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windows-nt-4.0/private/ntos/video/v7/v7.c

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/*++
Copyright (c) 1992 Microsoft Corporation
Module Name:
v7.c
Abstract:
This is the miniport driver for the V7 cards.
Environment:
kernel mode only
Notes:
Revision History:
--*/
#include "dderror.h"
#include "devioctl.h"
#include "miniport.h"
#include "ntddvdeo.h"
#include "video.h"
#include "v7.h"
// NOTE: should be a variable
#define POINTER_BANK 1
//
// Function declarations
//
// Functions that start with 'VGA' are entry points for the OS port driver.
//
VP_STATUS
VgaFindAdapter(
PVOID HwDeviceExtension,
PVOID HwContext,
PWSTR ArgumentString,
PVIDEO_PORT_CONFIG_INFO ConfigInfo,
PUCHAR Again
);
BOOLEAN
VgaInitialize(
PVOID HwDeviceExtension
);
BOOLEAN
VgaStartIO(
PVOID HwDeviceExtension,
PVIDEO_REQUEST_PACKET RequestPacket
);
//
// Private function prototypes.
//
VP_STATUS
VgaQueryAvailableModes(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_MODE_INFORMATION ModeInformation,
ULONG ModeInformationSize,
PULONG OutputSize
);
VP_STATUS
VgaQueryNumberOfAvailableModes(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_NUM_MODES NumModes,
ULONG NumModesSize,
PULONG OutputSize
);
VP_STATUS
VgaQueryCurrentMode(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_MODE_INFORMATION ModeInformation,
ULONG ModeInformationSize,
PULONG OutputSize
);
VP_STATUS
VgaSetMode(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_MODE Mode,
ULONG ModeSize
);
VP_STATUS
VgaLoadAndSetFont(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_LOAD_FONT_INFORMATION FontInformation,
ULONG FontInformationSize
);
VP_STATUS
VgaQueryCursorPosition(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_CURSOR_POSITION CursorPosition,
ULONG CursorPositionSize,
PULONG OutputSize
);
VP_STATUS
VgaSetCursorPosition(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_CURSOR_POSITION CursorPosition,
ULONG CursorPositionSize
);
VP_STATUS
VgaQueryCursorAttributes(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_CURSOR_ATTRIBUTES CursorAttributes,
ULONG CursorAttributesSize,
PULONG OutputSize
);
VP_STATUS
VgaSetCursorAttributes(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_CURSOR_ATTRIBUTES CursorAttributes,
ULONG CursorAttributesSize
);
BOOLEAN
VgaIsPresent(
PHW_DEVICE_EXTENSION HwDeviceExtension
);
VOID
V7EnablePointer(
PHW_DEVICE_EXTENSION HwDeviceExtension
);
VOID
V7DisablePointer(
PHW_DEVICE_EXTENSION HwDeviceExtension
);
BOOLEAN
V7IsPresent(
PHW_DEVICE_EXTENSION HwDeviceExtension
);
VOID
VgaInterpretCmdStream(
PVOID HwDeviceExtension,
PUSHORT pusCmdStream
);
VP_STATUS
VgaSetPaletteReg(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_PALETTE_DATA PaletteBuffer,
ULONG PaletteBufferSize
);
VP_STATUS
VgaSetColorLookup(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_CLUT ClutBuffer,
ULONG ClutBufferSize
);
VP_STATUS
VgaRestoreHardwareState(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_HARDWARE_STATE HardwareState,
ULONG HardwareStateSize
);
VP_STATUS
VgaSaveHardwareState(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_HARDWARE_STATE HardwareState,
ULONG HardwareStateSize,
PULONG OutputSize
);
VP_STATUS
VgaGetBankSelectCode(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_BANK_SELECT BankSelect,
ULONG BankSelectSize,
PULONG OutputSize
);
VP_STATUS
VgaQueryPointerCapabilities(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_POINTER_CAPABILITIES PointerCaps,
ULONG PointerCapsSize,
PULONG OutputSize
);
VP_STATUS
VgaSetPointerPosition(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_POINTER_POSITION pPointerPosition,
ULONG PointerPositionSize,
PULONG OutputSize
);
VP_STATUS
VgaQueryPointerPosition(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_POINTER_POSITION pPointerPosition,
ULONG PointerPositionSize,
PULONG OutputSize
);
VP_STATUS
VgaSetPointerAttributes(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_POINTER_ATTRIBUTES pVideoPointerAttributes,
ULONG PointerAttributesSize,
PULONG OutputSize
);
VP_STATUS
VgaQueryPointerAttributes(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_POINTER_ATTRIBUTES pVideoPointerAttributes,
ULONG PointerAttributesSize,
PULONG OutputSize
);
VOID
vBankMap_1RW(
LONG iBankRead,
LONG iBankWrite,
PVOID pvContext
);
VOID
vBankMap_2RW(
LONG iBankRead,
LONG iBankWrite,
PVOID pvContext
);
#if defined(ALLOC_PRAGMA)
#pragma alloc_text(PAGE,DriverEntry)
#pragma alloc_text(PAGE,VgaFindAdapter)
#pragma alloc_text(PAGE,VgaInitialize)
#pragma alloc_text(PAGE,VgaStartIO)
#pragma alloc_text(PAGE,VgaLoadAndSetFont)
#pragma alloc_text(PAGE,VgaQueryCursorPosition)
#pragma alloc_text(PAGE,VgaSetCursorPosition)
#pragma alloc_text(PAGE,VgaQueryCursorAttributes)
#pragma alloc_text(PAGE,VgaSetCursorAttributes)
#pragma alloc_text(PAGE,VgaIsPresent)
#pragma alloc_text(PAGE,V7EnablePointer)
#pragma alloc_text(PAGE,V7DisablePointer)
#pragma alloc_text(PAGE,V7IsPresent)
#pragma alloc_text(PAGE,VgaSetPaletteReg)
#pragma alloc_text(PAGE,VgaSetColorLookup)
#pragma alloc_text(PAGE,VgaRestoreHardwareState)
#pragma alloc_text(PAGE,VgaSaveHardwareState)
#pragma alloc_text(PAGE,VgaGetBankSelectCode)
#pragma alloc_text(PAGE,VgaQueryPointerCapabilities)
#pragma alloc_text(PAGE,VgaSetPointerPosition)
#pragma alloc_text(PAGE,VgaQueryPointerPosition)
#pragma alloc_text(PAGE,VgaSetPointerAttributes)
#pragma alloc_text(PAGE,VgaQueryPointerAttributes)
#pragma alloc_text(PAGE,VgaValidatorUcharEntry)
#pragma alloc_text(PAGE,VgaValidatorUshortEntry)
#pragma alloc_text(PAGE,VgaValidatorUlongEntry)
#endif
//
// exported from modeset.c
//
VOID
VgaSizeMemory(
PHW_DEVICE_EXTENSION HwDeviceExtension
);
VOID
VgaValidateModes(
PHW_DEVICE_EXTENSION HwDeviceExtension
);
ULONG
DriverEntry(
PVOID Context1,
PVOID Context2
)
/*++
Routine Description:
Installable driver initialization entry point.
This entry point is called directly by the I/O system.
Arguments:
Context1 - First context value passed by the operating system. This is
the value with which the miniport driver calls VideoPortInitialize().
Context2 - Second context value passed by the operating system. This is
the value with which the miniport driver calls VideoPortInitialize().
Return Value:
Status from VideoPortInitialize()
--*/
{
VIDEO_HW_INITIALIZATION_DATA hwInitData;
ULONG status;
ULONG initializationStatus;
//
// Zero out structure.
//
VideoPortZeroMemory(&hwInitData, sizeof(VIDEO_HW_INITIALIZATION_DATA));
//
// Specify sizes of structure and extension.
//
hwInitData.HwInitDataSize = sizeof(VIDEO_HW_INITIALIZATION_DATA);
//
// Set entry points.
//
hwInitData.HwFindAdapter = VgaFindAdapter;
hwInitData.HwInitialize = VgaInitialize;
hwInitData.HwInterrupt = NULL;
hwInitData.HwStartIO = VgaStartIO;
//
// Determine the size we require for the device extension.
//
hwInitData.HwDeviceExtensionSize = sizeof(HW_DEVICE_EXTENSION);
//
// Always start with parameters for device0 in this case.
// We can leave it like this since we know we will only ever find one
// VGA type adapter in a machine.
//
// hwInitData.StartingDeviceNumber = 0;
//
// Once all the relevant information has been stored, call the video
// port driver to do the initialization.
// For this device we will repeat this call three times, for ISA, EISA
// and MCA.
// We will return the minimum of all return values.
//
hwInitData.AdapterInterfaceType = Isa;
initializationStatus = VideoPortInitialize(Context1,
Context2,
&hwInitData,
NULL);
hwInitData.AdapterInterfaceType = Eisa;
status = VideoPortInitialize(Context1,
Context2,
&hwInitData,
NULL);
if (initializationStatus > status) {
initializationStatus = status;
}
hwInitData.AdapterInterfaceType = MicroChannel;
status = VideoPortInitialize(Context1,
Context2,
&hwInitData,
NULL);
if (initializationStatus > status) {
initializationStatus = status;
}
return initializationStatus;
} // end DriverEntry()
VP_STATUS
VgaFindAdapter(
PVOID HwDeviceExtension,
PVOID HwContext,
PWSTR ArgumentString,
PVIDEO_PORT_CONFIG_INFO ConfigInfo,
PUCHAR Again
)
/*++
Routine Description:
This routine is called to determine if the adapter for this driver
is present in the system.
If it is present, the function fills out some information describing
the adapter.
Arguments:
HwDeviceExtension - Supplies the miniport driver's adapter storage. This
storage is initialized to zero before this call.
HwContext - Supplies the context value which was passed to
VideoPortInitialize().
ArgumentString - Suuplies a NULL terminated ASCII string. This string
originates from the user.
ConfigInfo - Returns the configuration information structure which is
filled by the miniport driver. This structure is initialized with
any knwon configuration information (such as SystemIoBusNumber) by
the port driver. Where possible, drivers should have one set of
defaults which do not require any supplied configuration information.
Again - Indicates if the miniport driver wants the port driver to call
its VIDEO_HW_FIND_ADAPTER function again with a new device extension
and the same config info. This is used by the miniport drivers which
can search for several adapters on a bus.
Return Value:
This routine must return:
NO_ERROR - Indicates a host adapter was found and the
configuration information was successfully determined.
ERROR_INVALID_PARAMETER - Indicates an adapter was found but there was an
error obtaining the configuration information. If possible an error
should be logged.
ERROR_DEV_NOT_EXIST - Indicates no host adapter was found for the
supplied configuration information.
--*/
{
PHW_DEVICE_EXTENSION hwDeviceExtension = HwDeviceExtension;
VP_STATUS status;
PHYSICAL_ADDRESS physicalAddress;
//
// Make sure the size of the structure is at least as large as what we
// are expecting (check version of the config info structure).
//
if (ConfigInfo->Length < sizeof(VIDEO_PORT_CONFIG_INFO)) {
return ERROR_INVALID_PARAMETER;
}
//
// No interrupt information is necessary.
//
//
// Check to see if there is a hardware resource conflict.
//
status = VideoPortVerifyAccessRanges(HwDeviceExtension,
NUM_VGA_ACCESS_RANGES,
VgaAccessRange);
if (status != NO_ERROR) {
return status;
}
//
// Get logical IO port addresses.
//
if ( (hwDeviceExtension->IOAddress =
VideoPortGetDeviceBase(hwDeviceExtension,
VgaAccessRange->RangeStart,
VGA_MAX_IO_PORT - VGA_BASE_IO_PORT + 1,
TRUE)) == NULL) {
VideoDebugPrint((2, "VgaFindAdapter - Fail to get io address\n"));
return ERROR_INVALID_PARAMETER;
}
//
// Determine whether a VGA is present.
//
if (!VgaIsPresent(hwDeviceExtension)) {
return ERROR_DEV_NOT_EXIST;
}
//
// Pass a pointer to the emulator range we are using.
//
ConfigInfo->NumEmulatorAccessEntries = VGA_NUM_EMULATOR_ACCESS_ENTRIES;
ConfigInfo->EmulatorAccessEntries = VgaEmulatorAccessEntries;
ConfigInfo->EmulatorAccessEntriesContext = (ULONG) hwDeviceExtension;
ConfigInfo->VdmPhysicalVideoMemoryAddress.LowPart = MEM_VGA;
ConfigInfo->VdmPhysicalVideoMemoryAddress.HighPart = 0x00000000;
ConfigInfo->VdmPhysicalVideoMemoryLength = MEM_VGA_SIZE;
//
// Minimum size of the buffer required to store the hardware state
// information returned by IOCTL_VIDEO_SAVE_HARDWARE_STATE.
//
ConfigInfo->HardwareStateSize = VGA_TOTAL_STATE_SIZE;
//
// Video memory information
//
hwDeviceExtension->PhysicalVideoMemoryBase.HighPart = 0x00000000;
hwDeviceExtension->PhysicalVideoMemoryBase.LowPart = MEM_VGA;
hwDeviceExtension->PhysicalVideoMemoryLength = MEM_VGA_SIZE;
//
// Map the video memory into the system virtual address space so we can
// clear it out and use it for save and restore.
//
if ( (hwDeviceExtension->VideoMemoryAddress =
VideoPortGetDeviceBase(hwDeviceExtension,
hwDeviceExtension->PhysicalVideoMemoryBase,
hwDeviceExtension->PhysicalVideoMemoryLength,
FALSE)) == NULL) {
VideoDebugPrint((1, "VgaFindAdapter - Fail to get memory address\n"));
return ERROR_INVALID_PARAMETER;
}
//
// Map the regen of memory where Fonts can be found or loaded from.
// Note that this is also used for identifying the adapter, below, so
// it cannot be removed even if font loading from the ROM is eliminated.
//
physicalAddress.LowPart = ROM_BASE;
physicalAddress.HighPart = 0x00000000;
if ( (hwDeviceExtension->ROMBaseAddress =
VideoPortGetDeviceBase(hwDeviceExtension,
physicalAddress,
ROM_LENGTH,
FALSE)) == NULL) {
VideoDebugPrint((2, "VgaFindAdapter - Fail to get font address\n"));
return ERROR_INVALID_PARAMETER;
}
//
// Determine whether a supported V7 adapter is present, and if so, what
// kind.
//
if (!V7IsPresent(hwDeviceExtension)) {
return ERROR_DEV_NOT_EXIST;
}
//
// Indicate we do not wish to be called again for another initialization.
//
*Again = 0;
//
// Indicate a successful completion status.
//
return NO_ERROR;
} // VgaFindAdapter()
BOOLEAN
VgaInitialize(
PVOID HwDeviceExtension
)
/*++
Routine Description:
This routine does one time initialization of the device.
Arguments:
HwDeviceExtension - Pointer to the miniport driver's adapter information.
Return Value:
None.
--*/
{
PHW_DEVICE_EXTENSION hwDeviceExtension = HwDeviceExtension;
//
// ***************************
// ***** IMPORTANT NOTE ******
// ***************************
//
// We do the memory size detection and calculate valid modes here
// because we need to do an int10 for that.
// An int 10 is only possible when being called by the display driver,
// (more precisely in the context of the caller)
// and must therefore be done in the Initialize routine.
//
VgaSizeMemory(HwDeviceExtension);
//
// Write amount of memory to registry
//
VideoPortSetRegistryParameters(hwDeviceExtension,
L"HardwareInformation.MemorySize",
&hwDeviceExtension->AdapterMemorySize,
sizeof(ULONG));
VgaValidateModes(HwDeviceExtension);
//
// set up the default cursor position and type.
//
hwDeviceExtension->CursorPosition.Column = 0;
hwDeviceExtension->CursorPosition.Row = 0;
hwDeviceExtension->CursorTopScanLine = 0;
hwDeviceExtension->CursorBottomScanLine = 31;
hwDeviceExtension->CursorEnable = TRUE;
return TRUE;
} // VgaInitialize()
BOOLEAN
VgaStartIO(
PVOID HwDeviceExtension,
PVIDEO_REQUEST_PACKET RequestPacket
)
/*++
Routine Description:
This routine is the main execution routine for the miniport driver. It
acceptss a Video Request Packet, performs the request, and then returns
with the appropriate status.
Arguments:
HwDeviceExtension - Pointer to the miniport driver's adapter information.
RequestPacket - Pointer to the video request packet. This structure
contains all the parameters passed to the VideoIoControl function.
Return Value:
This routine will return error codes from the various support routines
and will also return ERROR_INSUFFICIENT_BUFFER for incorrectly sized
buffers and ERROR_INVALID_FUNCTION for unsupported functions.
--*/
{
PHW_DEVICE_EXTENSION hwDeviceExtension = HwDeviceExtension;
VP_STATUS status;
VIDEO_MODE videoMode;
PVIDEO_MEMORY_INFORMATION memoryInformation;
ULONG inIoSpace;
PVIDEO_SHARE_MEMORY pShareMemory;
PVIDEO_SHARE_MEMORY_INFORMATION pShareMemoryInformation;
PHYSICAL_ADDRESS shareAddress;
PVOID virtualAddress;
ULONG sharedViewSize;
ULONG ulBankSize;
VOID (*pfnBank)(LONG,LONG,PVOID);
//
// Switch on the IoContolCode in the RequestPacket. It indicates which
// function must be performed by the driver.
//
switch (RequestPacket->IoControlCode) {
case IOCTL_VIDEO_SHARE_VIDEO_MEMORY:
VideoDebugPrint((2, "VgaStartIO - ShareVideoMemory\n"));
if ( (RequestPacket->OutputBufferLength < sizeof(VIDEO_SHARE_MEMORY_INFORMATION)) ||
(RequestPacket->InputBufferLength < sizeof(VIDEO_MEMORY)) ) {
status = ERROR_INSUFFICIENT_BUFFER;
VideoDebugPrint((0, "VgaStartIO - ShareVideoMemory - ERROR_INSUFFICIENT_BUFFER\n"));
break;
}
pShareMemory = RequestPacket->InputBuffer;
if ( (pShareMemory->ViewOffset > hwDeviceExtension->AdapterMemorySize) ||
((pShareMemory->ViewOffset + pShareMemory->ViewSize) >
hwDeviceExtension->AdapterMemorySize) ) {
status = ERROR_INVALID_PARAMETER;
VideoDebugPrint((0, "VgaStartIO - ShareVideoMemory - ERROR_INVALID_PARAMETER\n"));
break;
}
RequestPacket->StatusBlock->Information =
sizeof(VIDEO_SHARE_MEMORY_INFORMATION);
//
// Beware: the input buffer and the output buffer are the same
// buffer, and therefore data should not be copied from one to the
// other
//
virtualAddress = pShareMemory->ProcessHandle;
sharedViewSize = pShareMemory->ViewSize;
inIoSpace = 0;
//
// NOTE: we are ignoring ViewOffset
//
shareAddress.QuadPart =
hwDeviceExtension->PhysicalFrameBase.QuadPart;
switch(hwDeviceExtension->CurrentMode->banktype) {
case VideoBanked1RW:
ulBankSize = 0x10000; // 64K bank granularity
pfnBank = vBankMap_1RW;
break;
case VideoBanked2RW:
ulBankSize = 0x1000; // 4K bank granularity
pfnBank = vBankMap_2RW;
break;
default:
VideoDebugPrint((0, "IOCTL_VIDEO_SHARE_VIDEO_MEMORY - Unsupported bank type\n"));
return ERROR_INVALID_PARAMETER;
}
status = VideoPortMapBankedMemory(hwDeviceExtension,
shareAddress,
&sharedViewSize,
&inIoSpace,
&virtualAddress,
ulBankSize, // bank size
TRUE, // we don't have separate read/write
pfnBank,
(PVOID)hwDeviceExtension);
pShareMemoryInformation = RequestPacket->OutputBuffer;
pShareMemoryInformation->SharedViewOffset = pShareMemory->ViewOffset;
pShareMemoryInformation->VirtualAddress = virtualAddress;
pShareMemoryInformation->SharedViewSize = sharedViewSize;
break;
case IOCTL_VIDEO_UNSHARE_VIDEO_MEMORY:
VideoDebugPrint((2, "VgaStartIO - UnshareVideoMemory\n"));
if (RequestPacket->InputBufferLength < sizeof(VIDEO_SHARE_MEMORY)) {
status = ERROR_INSUFFICIENT_BUFFER;
break;
}
pShareMemory = RequestPacket->InputBuffer;
status = VideoPortUnmapMemory(hwDeviceExtension,
pShareMemory->RequestedVirtualAddress,
pShareMemory->ProcessHandle);
break;
case IOCTL_VIDEO_MAP_VIDEO_MEMORY:
VideoDebugPrint((2, "VgaStartIO - MapVideoMemory\n"));
if ( (RequestPacket->OutputBufferLength <
(RequestPacket->StatusBlock->Information =
sizeof(VIDEO_MEMORY_INFORMATION))) ||
(RequestPacket->InputBufferLength < sizeof(VIDEO_MEMORY)) ) {
status = ERROR_INSUFFICIENT_BUFFER;
}
memoryInformation = RequestPacket->OutputBuffer;
memoryInformation->VideoRamBase = ((PVIDEO_MEMORY)
(RequestPacket->InputBuffer))->RequestedVirtualAddress;
memoryInformation->VideoRamLength =
hwDeviceExtension->PhysicalVideoMemoryLength;
inIoSpace = 0;
status = VideoPortMapMemory(hwDeviceExtension,
hwDeviceExtension->PhysicalVideoMemoryBase,
&(memoryInformation->VideoRamLength),
&inIoSpace,
&(memoryInformation->VideoRamBase));
memoryInformation->FrameBufferBase =
((PUCHAR) (memoryInformation->VideoRamBase)) +
(hwDeviceExtension->PhysicalFrameBase.LowPart -
hwDeviceExtension->PhysicalVideoMemoryBase.LowPart);
memoryInformation->FrameBufferLength =
hwDeviceExtension->PhysicalFrameLength;
break;
case IOCTL_VIDEO_UNMAP_VIDEO_MEMORY:
VideoDebugPrint((2, "VgaStartIO - UnMapVideoMemory\n"));
if (RequestPacket->InputBufferLength < sizeof(VIDEO_MEMORY)) {
status = ERROR_INSUFFICIENT_BUFFER;
}
status = VideoPortUnmapMemory(hwDeviceExtension,
((PVIDEO_MEMORY)
(RequestPacket->InputBuffer))->
RequestedVirtualAddress,
0);
break;
case IOCTL_VIDEO_QUERY_AVAIL_MODES:
VideoDebugPrint((2, "VgaStartIO - QueryAvailableModes\n"));
status = VgaQueryAvailableModes(HwDeviceExtension,
(PVIDEO_MODE_INFORMATION)
RequestPacket->OutputBuffer,
RequestPacket->OutputBufferLength,
&RequestPacket->StatusBlock->Information);
break;
case IOCTL_VIDEO_QUERY_NUM_AVAIL_MODES:
VideoDebugPrint((2, "VgaStartIO - QueryNumAvailableModes\n"));
status = VgaQueryNumberOfAvailableModes(HwDeviceExtension,
(PVIDEO_NUM_MODES)
RequestPacket->OutputBuffer,
RequestPacket->OutputBufferLength,
&RequestPacket->StatusBlock->Information);
break;
case IOCTL_VIDEO_QUERY_CURRENT_MODE:
VideoDebugPrint((2, "VgaStartIO - QueryCurrentMode\n"));
status = VgaQueryCurrentMode(HwDeviceExtension,
(PVIDEO_MODE_INFORMATION) RequestPacket->OutputBuffer,
RequestPacket->OutputBufferLength,
&RequestPacket->StatusBlock->Information);
break;
case IOCTL_VIDEO_SET_CURRENT_MODE:
VideoDebugPrint((2, "VgaStartIO - SetCurrentModes\n"));
status = VgaSetMode(HwDeviceExtension,
(PVIDEO_MODE) RequestPacket->InputBuffer,
RequestPacket->InputBufferLength);
break;
case IOCTL_VIDEO_RESET_DEVICE:
VideoDebugPrint((2, "VgaStartIO - Reset Device\n"));
videoMode.RequestedMode = DEFAULT_MODE;
status = VgaSetMode(HwDeviceExtension,
(PVIDEO_MODE) &videoMode,
sizeof(videoMode));
break;
case IOCTL_VIDEO_LOAD_AND_SET_FONT:
VideoDebugPrint((2, "VgaStartIO - LoadAndSetFont\n"));
status = VgaLoadAndSetFont(HwDeviceExtension,
(PVIDEO_LOAD_FONT_INFORMATION) RequestPacket->InputBuffer,
RequestPacket->InputBufferLength);
break;
case IOCTL_VIDEO_QUERY_CURSOR_POSITION:
VideoDebugPrint((2, "VgaStartIO - QueryCursorPosition\n"));
status = VgaQueryCursorPosition(HwDeviceExtension,
(PVIDEO_CURSOR_POSITION) RequestPacket->OutputBuffer,
RequestPacket->OutputBufferLength,
&RequestPacket->StatusBlock->Information);
break;
case IOCTL_VIDEO_SET_CURSOR_POSITION:
VideoDebugPrint((2, "VgaStartIO - SetCursorPosition\n"));
status = VgaSetCursorPosition(HwDeviceExtension,
(PVIDEO_CURSOR_POSITION)
RequestPacket->InputBuffer,
RequestPacket->InputBufferLength);
break;
case IOCTL_VIDEO_QUERY_CURSOR_ATTR:
VideoDebugPrint((2, "VgaStartIO - QueryCursorAttributes\n"));
status = VgaQueryCursorAttributes(HwDeviceExtension,
(PVIDEO_CURSOR_ATTRIBUTES) RequestPacket->OutputBuffer,
RequestPacket->OutputBufferLength,
&RequestPacket->StatusBlock->Information);
break;
case IOCTL_VIDEO_SET_CURSOR_ATTR:
VideoDebugPrint((2, "VgaStartIO - SetCursorAttributes\n"));
status = VgaSetCursorAttributes(HwDeviceExtension,
(PVIDEO_CURSOR_ATTRIBUTES) RequestPacket->InputBuffer,
RequestPacket->InputBufferLength);
break;
case IOCTL_VIDEO_SET_PALETTE_REGISTERS:
VideoDebugPrint((2, "VgaStartIO - SetPaletteRegs\n"));
status = VgaSetPaletteReg(HwDeviceExtension,
(PVIDEO_PALETTE_DATA) RequestPacket->InputBuffer,
RequestPacket->InputBufferLength);
break;
case IOCTL_VIDEO_SET_COLOR_REGISTERS:
VideoDebugPrint((2, "VgaStartIO - SetColorRegs\n"));
status = VgaSetColorLookup(HwDeviceExtension,
(PVIDEO_CLUT) RequestPacket->InputBuffer,
RequestPacket->InputBufferLength);
break;
case IOCTL_VIDEO_ENABLE_VDM:
VideoDebugPrint((2, "VgaStartIO - EnableVDM\n"));
hwDeviceExtension->TrappedValidatorCount = 0;
hwDeviceExtension->SequencerAddressValue = 0;
hwDeviceExtension->CurrentNumVdmAccessRanges =
NUM_MINIMAL_VGA_VALIDATOR_ACCESS_RANGE;
hwDeviceExtension->CurrentVdmAccessRange =
MinimalVgaValidatorAccessRange;
VideoPortSetTrappedEmulatorPorts(hwDeviceExtension,
hwDeviceExtension->CurrentNumVdmAccessRanges,
hwDeviceExtension->CurrentVdmAccessRange);
status = NO_ERROR;
break;
case IOCTL_VIDEO_RESTORE_HARDWARE_STATE:
VideoDebugPrint((2, "VgaStartIO - RestoreHardwareState\n"));
status = VgaRestoreHardwareState(HwDeviceExtension,
(PVIDEO_HARDWARE_STATE) RequestPacket->InputBuffer,
RequestPacket->InputBufferLength);
break;
case IOCTL_VIDEO_SAVE_HARDWARE_STATE:
VideoDebugPrint((2, "VgaStartIO - SaveHardwareState\n"));
status = VgaSaveHardwareState(HwDeviceExtension,
(PVIDEO_HARDWARE_STATE) RequestPacket->OutputBuffer,
RequestPacket->OutputBufferLength,
&RequestPacket->StatusBlock->Information);
break;
case IOCTL_VIDEO_GET_BANK_SELECT_CODE:
VideoDebugPrint((2, "VgaStartIO - GetBankSelectCode\n"));
status = VgaGetBankSelectCode(HwDeviceExtension,
(PVIDEO_BANK_SELECT) RequestPacket->OutputBuffer,
RequestPacket->OutputBufferLength,
&RequestPacket->StatusBlock->Information);
break;
//
// There is a monochrome hardware cursor.
//
case IOCTL_VIDEO_QUERY_POINTER_CAPABILITIES:
VideoDebugPrint((2, "V7 - QueryPointerCapabilities\n"));
status = VgaQueryPointerCapabilities(HwDeviceExtension,
(PVIDEO_POINTER_CAPABILITIES) RequestPacket->OutputBuffer,
RequestPacket->OutputBufferLength,
&RequestPacket->StatusBlock->Information);
break;
case IOCTL_VIDEO_ENABLE_POINTER:
V7EnablePointer(HwDeviceExtension);
hwDeviceExtension->videoPointerAttributes.Enable = 1;
status = NO_ERROR;
break;
case IOCTL_VIDEO_DISABLE_POINTER:
V7DisablePointer(HwDeviceExtension);
hwDeviceExtension->videoPointerAttributes.Enable = 0;
status = NO_ERROR;
break;
case IOCTL_VIDEO_SET_POINTER_ATTR:
status = VgaSetPointerAttributes(HwDeviceExtension,
(PVIDEO_POINTER_ATTRIBUTES) RequestPacket->InputBuffer,
RequestPacket->InputBufferLength,
&RequestPacket->StatusBlock->Information);
break;
case IOCTL_VIDEO_QUERY_POINTER_ATTR:
status = VgaQueryPointerAttributes(HwDeviceExtension,
(PVIDEO_POINTER_ATTRIBUTES) RequestPacket->OutputBuffer,
RequestPacket->OutputBufferLength,
&RequestPacket->StatusBlock->Information);
break;
case IOCTL_VIDEO_SET_POINTER_POSITION:
status = VgaSetPointerPosition(HwDeviceExtension,
(PVIDEO_POINTER_POSITION) RequestPacket->InputBuffer,
RequestPacket->InputBufferLength,
&RequestPacket->StatusBlock->Information);
break;
case IOCTL_VIDEO_QUERY_POINTER_POSITION:
status = VgaQueryPointerPosition(HwDeviceExtension,
(PVIDEO_POINTER_POSITION) RequestPacket->OutputBuffer,
RequestPacket->OutputBufferLength,
&RequestPacket->StatusBlock->Information);
break;
//
// If we get here, an invalid IoControlCode was specified.
//
default:
VideoDebugPrint((1, "Fell through vga startIO routine - invalid command\n"));
RequestPacket->StatusBlock->Information = 0;
status = ERROR_INVALID_FUNCTION;
break;
}
RequestPacket->StatusBlock->Status = status;
return TRUE;
} // VgaStartIO()
//
// private routines
//
VP_STATUS
VgaLoadAndSetFont(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_LOAD_FONT_INFORMATION FontInformation,
ULONG FontInformationSize
)
/*++
Routine Description:
Takes a buffer containing a user-defined font and loads it into the
VGA soft font memory and programs the VGA to the appropriate character
cell size.
Arguments:
HwDeviceExtension - Pointer to the miniport driver's device extension.
FontInformation - Pointer to the structure containing the information
about the loadable ROM font to be set.
FontInformationSize - Length of the input buffer supplied by the user.
Return Value:
NO_ERROR - information returned successfully
ERROR_INSUFFICIENT_BUFFER - input buffer not large enough for input data.
ERROR_INVALID_PARAMETER - invalid video mode
--*/
{
PUCHAR destination;
PUCHAR source;
USHORT width;
ULONG i;
//
// check if a mode has been set
//
if (HwDeviceExtension->CurrentMode == NULL) {
return ERROR_INVALID_FUNCTION;
}
//
// Text mode only; If we are in a graphics mode, return an error
//
if (HwDeviceExtension->CurrentMode->fbType & VIDEO_MODE_GRAPHICS) {
return ERROR_INVALID_PARAMETER;
}
//
// Check if the size of the data in the input buffer is large enough
// and that it contains all the data.
//
if ( (FontInformationSize < sizeof(VIDEO_LOAD_FONT_INFORMATION)) ||
(FontInformationSize < sizeof(VIDEO_LOAD_FONT_INFORMATION) +
sizeof(UCHAR) * (FontInformation->FontSize - 1)) ) {
return ERROR_INSUFFICIENT_BUFFER;
}
//
// Check for the width and height of the font
//
if ( ((FontInformation->WidthInPixels != 8) &&
(FontInformation->WidthInPixels != 9)) ||
(FontInformation->HeightInPixels > 32) ) {
return ERROR_INVALID_PARAMETER;
}
//
// Check the size of the font buffer is the right size for the size
// font being passed down.
//
if (FontInformation->FontSize < FontInformation->HeightInPixels * 256 *
sizeof(UCHAR) ) {
return ERROR_INSUFFICIENT_BUFFER;
}
//
// Since the font parameters are valid, store the parameters in the
// device extension and load the font.
//
HwDeviceExtension->FontPelRows = FontInformation->HeightInPixels;
HwDeviceExtension->FontPelColumns = FontInformation->WidthInPixels;
HwDeviceExtension->CurrentMode->row =
HwDeviceExtension->CurrentMode->vres / FontInformation->HeightInPixels;
width =
HwDeviceExtension->CurrentMode->hres / HwDeviceExtension->FontPelColumns;
if (width < (USHORT)HwDeviceExtension->CurrentMode->col) {
HwDeviceExtension->CurrentMode->col = width;
}
source = &(FontInformation->Font[0]);
//
// Set up the destination and source pointers for the font
//
destination = (PUCHAR)HwDeviceExtension->VideoMemoryAddress;
//
// Map font buffer at A0000
//
VgaInterpretCmdStream(HwDeviceExtension, EnableA000Data);
//
// Move the font to its destination
//
for (i = 1; i <= 256; i++) {
VideoPortWriteRegisterBufferUchar(destination,
source,
FontInformation->HeightInPixels);
destination += 32;
source += FontInformation->HeightInPixels;
}
VgaInterpretCmdStream(HwDeviceExtension, DisableA000Color);
//
// Restore to a text mode.
//
//
// Set Height of font.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
CRTC_ADDRESS_PORT_COLOR, 0x9);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
CRTC_DATA_PORT_COLOR,
(UCHAR)(FontInformation->HeightInPixels - 1));
//
// Set Width of font.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
CRTC_ADDRESS_PORT_COLOR, 0x12);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
CRTC_DATA_PORT_COLOR,
(UCHAR)(((USHORT)FontInformation->HeightInPixels *
(USHORT)HwDeviceExtension->CurrentMode->row) - 1));
i = HwDeviceExtension->CurrentMode->vres /
HwDeviceExtension->CurrentMode->row;
//
// Set Cursor End
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
CRTC_ADDRESS_PORT_COLOR, 0xb);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
CRTC_DATA_PORT_COLOR, (UCHAR)--i);
//
// Set Cursor Statr
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
CRTC_ADDRESS_PORT_COLOR, 0xa);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
CRTC_DATA_PORT_COLOR, (UCHAR)--i);
return NO_ERROR;
} //end VgaLoadAndSetFont()
VP_STATUS
VgaQueryCursorPosition(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_CURSOR_POSITION CursorPosition,
ULONG CursorPositionSize,
PULONG OutputSize
)
/*++
Routine Description:
This routine returns the row and column of the cursor.
Arguments:
HwDeviceExtension - Pointer to the miniport driver's device extension.
CursorPosition - Pointer to the output buffer supplied by the user. This
is where the cursor position is stored.
CursorPositionSize - Length of the output buffer supplied by the user.
OutputSize - Pointer to a buffer in which to return the actual size of
the data in the buffer. If the buffer was not large enough, this
contains the minimum required buffer size.
Return Value:
NO_ERROR - information returned successfully
ERROR_INSUFFICIENT_BUFFER - output buffer not large enough to return
any useful data
ERROR_INVALID_PARAMETER - invalid video mode
--*/
{
//
// check if a mode has been set
//
if (HwDeviceExtension->CurrentMode == NULL) {
return ERROR_INVALID_FUNCTION;
}
//
// Text mode only; If we are in a graphics mode, return an error
//
if (HwDeviceExtension->CurrentMode->fbType & VIDEO_MODE_GRAPHICS) {
*OutputSize = 0;
return ERROR_INVALID_PARAMETER;
}
//
// If the buffer passed in is not large enough return an
// appropriate error code.
//
if (CursorPositionSize < (*OutputSize = sizeof(VIDEO_CURSOR_POSITION)) ) {
*OutputSize = 0;
return ERROR_INSUFFICIENT_BUFFER;
}
//
// Store the postition of the cursor into the buffer.
//
CursorPosition->Column = HwDeviceExtension->CursorPosition.Column;
CursorPosition->Row = HwDeviceExtension->CursorPosition.Row;
return NO_ERROR;
} // end VgaQueryCursorPosition()
VP_STATUS
VgaSetCursorPosition(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_CURSOR_POSITION CursorPosition,
ULONG CursorPositionSize
)
/*++
Routine Description:
This routine verifies that the requested cursor position is within
the row and column bounds of the current mode and font. If valid, then
it sets the row and column of the cursor.
Arguments:
HwDeviceExtension - Pointer to the miniport driver's device extension.
CursorPosition - Pointer to the structure containing the cursor position.
CursorPositionSize - Length of the input buffer supplied by the user.
Return Value:
NO_ERROR - information returned successfully
ERROR_INSUFFICIENT_BUFFER - input buffer not large enough for input data
ERROR_INVALID_PARAMETER - invalid video mode
--*/
{
USHORT position;
//
// check if a mode has been set
//
if (HwDeviceExtension->CurrentMode == NULL) {
return ERROR_INVALID_FUNCTION;
}
//
// Text mode only; If we are in a graphics mode, return an error
//
if (HwDeviceExtension->CurrentMode->fbType & VIDEO_MODE_GRAPHICS) {
return ERROR_INVALID_PARAMETER;
}
//
// Check if the size of the data in the input buffer is large enough.
//
if (CursorPositionSize < sizeof(VIDEO_CURSOR_POSITION)) {
return ERROR_INSUFFICIENT_BUFFER;
}
//
// Check if the new values for the cursor positions are in the valid
// bounds for the screen.
//
if ((CursorPosition->Column >= HwDeviceExtension->CurrentMode->col) ||
(CursorPosition->Row >= HwDeviceExtension->CurrentMode->row)) {
return ERROR_INVALID_PARAMETER;
}
//
// Store these new values in the device extension so we can use them in
// a QUERY.
//
HwDeviceExtension->CursorPosition.Column = CursorPosition->Column;
HwDeviceExtension->CursorPosition.Row = CursorPosition->Row;
//
// Calculate the position on the screen at which the cursor must be
// be displayed
//
position = (USHORT) (HwDeviceExtension->CurrentMode->col *
CursorPosition->Row + CursorPosition->Column);
//
// Address Cursor Location Low Register in CRT Controller Registers
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
CRTC_ADDRESS_PORT_COLOR, IND_CURSOR_LOW_LOC);
//
// Set Cursor Location Low Register
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
CRTC_DATA_PORT_COLOR, (UCHAR) (position & 0x00FF));
//
// Address Cursor Location High Register in CRT Controller Registers
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
CRTC_ADDRESS_PORT_COLOR, IND_CURSOR_HIGH_LOC);
//
// Set Cursor Location High Register
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
CRTC_DATA_PORT_COLOR, (UCHAR) (position >> 8));
return NO_ERROR;
} // end VgaSetCursorPosition()
VP_STATUS
VgaQueryCursorAttributes(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_CURSOR_ATTRIBUTES CursorAttributes,
ULONG CursorAttributesSize,
PULONG OutputSize
)
/*++
Routine Description:
This routine returns information about the height and visibility of the
cursor.
Arguments:
HwDeviceExtension - Pointer to the miniport driver's device extension.
CursorAttributes - Pointer to the output buffer supplied by the user.
This is where the cursor type is stored.
CursorAttributesSize - Length of the output buffer supplied by the user.
OutputSize - Pointer to a buffer in which to return the actual size of
the data in the buffer. If the buffer was not large enough, this
contains the minimum required buffer size.
Return Value:
NO_ERROR - information returned successfully
ERROR_INSUFFICIENT_BUFFER - output buffer not large enough to return
any useful data
ERROR_INVALID_PARAMETER - invalid video mode
--*/
{
//
// check if a mode has been set
//
if (HwDeviceExtension->CurrentMode == NULL) {
return ERROR_INVALID_FUNCTION;
}
//
// Text mode only; If we are in a graphics mode, return an error
//
if (HwDeviceExtension->CurrentMode->fbType & VIDEO_MODE_GRAPHICS) {
*OutputSize = 0;
return ERROR_INVALID_PARAMETER;
}
//
// Find out the size of the data to be put in the the buffer and return
// that in the status information (whether or not the information is
// there). If the buffer passed in is not large enough return an
// appropriate error code.
//
if (CursorAttributesSize < (*OutputSize =
sizeof(VIDEO_CURSOR_ATTRIBUTES)) ) {
*OutputSize = 0;
return ERROR_INSUFFICIENT_BUFFER;
}
//
// Store the cursor information into the buffer.
//
CursorAttributes->Height = (USHORT) HwDeviceExtension->CursorTopScanLine;
CursorAttributes->Width = (USHORT) HwDeviceExtension->CursorBottomScanLine;
CursorAttributes->Enable = HwDeviceExtension->CursorEnable;
return NO_ERROR;
} // end VgaQueryCursorAttributes()
VP_STATUS
VgaSetCursorAttributes(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_CURSOR_ATTRIBUTES CursorAttributes,
ULONG CursorAttributesSize
)
/*++
Routine Description:
This routine verifies that the requested cursor height is within the
bounds of the character cell. If valid, then it sets the new
visibility and height of the cursor.
Arguments:
HwDeviceExtension - Pointer to the miniport driver's device extension.
CursorType - Pointer to the structure containing the cursor information.
CursorTypeSize - Length of the input buffer supplied by the user.
Return Value:
NO_ERROR - information returned successfully
ERROR_INSUFFICIENT_BUFFER - input buffer not large enough for input data
ERROR_INVALID_PARAMETER - invalid video mode
--*/
{
UCHAR cursorLine;
//
// check if a mode has been set
//
if (HwDeviceExtension->CurrentMode == NULL) {
return ERROR_INVALID_FUNCTION;
}
//
// Text mode only; If we are in a graphics mode, return an error
//
if (HwDeviceExtension->CurrentMode->fbType & VIDEO_MODE_GRAPHICS) {
return ERROR_INVALID_PARAMETER;
}
//
// Check if the size of the data in the input buffer is large enough.
//
if (CursorAttributesSize < sizeof(VIDEO_CURSOR_ATTRIBUTES)) {
return ERROR_INSUFFICIENT_BUFFER;
}
//
// Check if the new values for the cursor type are in the valid range.
//
if ((CursorAttributes->Height >= HwDeviceExtension->FontPelRows) ||
(CursorAttributes->Width > 31)) {
return ERROR_INVALID_PARAMETER;
}
//
// Store the cursor information in the device extension so we can use
// them in a QUERY.
//
HwDeviceExtension->CursorTopScanLine = (UCHAR) CursorAttributes->Height;
HwDeviceExtension->CursorBottomScanLine = (UCHAR) CursorAttributes->Width;
HwDeviceExtension->CursorEnable = CursorAttributes->Enable;
//
// Address Cursor Start Register in CRT Controller Registers
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
CRTC_ADDRESS_PORT_COLOR,
IND_CURSOR_START);
//
// Set Cursor Start Register by writting to CRTCtl Data Register
// Preserve the high three bits of this register.
//
// Only the Five low bits are used for the cursor height.
// Bit 5 is cursor enable, bit 6 and 7 preserved.
//
cursorLine = (UCHAR) CursorAttributes->Height & 0x1F;
cursorLine |= VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
CRTC_DATA_PORT_COLOR) & 0xC0;
if (!CursorAttributes->Enable) {
cursorLine |= 0x20; // Flip cursor off bit
}
VideoPortWritePortUchar(HwDeviceExtension->IOAddress + CRTC_DATA_PORT_COLOR,
cursorLine);
//
// Address Cursor End Register in CRT Controller Registers
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
CRTC_ADDRESS_PORT_COLOR,
IND_CURSOR_END);
//
// Set Cursor End Register. Preserve the high three bits of this
// register.
//
cursorLine = (UCHAR)
(CursorAttributes->Width < (USHORT) (HwDeviceExtension->FontPelRows - 1)) ?
CursorAttributes->Width : (HwDeviceExtension->FontPelRows - 1);
cursorLine &= 0x1f;
cursorLine |= VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
CRTC_DATA_PORT_COLOR) & 0xE0;
VideoPortWritePortUchar(HwDeviceExtension->IOAddress + CRTC_DATA_PORT_COLOR,
cursorLine);
return NO_ERROR;
} // end VgaSetCursorAttributes()
BOOLEAN
VgaIsPresent(
PHW_DEVICE_EXTENSION HwDeviceExtension
)
/*++
Routine Description:
This routine returns TRUE if a VGA is present. Determining whether a VGA
is present is a two-step process. First, this routine walks bits through
the Bit Mask register, to establish that there are readable indexed
registers (EGAs normally don't have readable registers, and other adapters
are unlikely to have indexed registers). This test is done first because
it's a non-destructive EGA rejection test (correctly rejects EGAs, but
doesn't potentially mess up the screen or the accessibility of display
memory). Normally, this would be an adequate test, but some EGAs have
readable registers, so next, we check for the existence of the Chain4 bit
in the Memory Mode register; this bit doesn't exist in EGAs. It's
conceivable that there are EGAs with readable registers and a register bit
where Chain4 is stored, although I don't know of any; if a better test yet
is needed, memory could be written to in Chain4 mode, and then examined
plane by plane in non-Chain4 mode to make sure the Chain4 bit did what it's
supposed to do. However, the current test should be adequate to eliminate
just about all EGAs, and 100% of everything else.
If this function fails to find a VGA, it attempts to undo any damage it
may have inadvertently done while testing. The underlying assumption for
the damage control is that if there's any non-VGA adapter at the tested
ports, it's an EGA or an enhanced EGA, because: a) I don't know of any
other adapters that use 3C4/5 or 3CE/F, and b), if there are other
adapters, I certainly don't know how to restore their original states. So
all error recovery is oriented toward putting an EGA back in a writable
state, so that error messages are visible. The EGA's state on entry is
assumed to be text mode, so the Memory Mode register is restored to the
default state for text mode.
If a VGA is found, the VGA is returned to its original state after
testing is finished.
Arguments:
None.
s
Return Value:
TRUE if a VGA is present, FALSE if not.
--*/
{
UCHAR originalGCAddr;
UCHAR originalSCAddr;
UCHAR originalBitMask;
UCHAR originalReadMap;
UCHAR originalMemoryMode;
UCHAR testMask;
BOOLEAN returnStatus;
//
// Remember the original state of the Graphics Controller Address register.
//
originalGCAddr = VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
GRAPH_ADDRESS_PORT);
//
// Write the Read Map register with a known state so we can verify
// that it isn't changed after we fool with the Bit Mask. This ensures
// that we're dealing with indexed registers, since both the Read Map and
// the Bit Mask are addressed at GRAPH_DATA_PORT.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_ADDRESS_PORT, IND_READ_MAP);
//
// If we can't read back the Graphics Address register setting we just
// performed, it's not readable and this isn't a VGA.
//
if ((VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
GRAPH_ADDRESS_PORT) & GRAPH_ADDR_MASK) != IND_READ_MAP) {
return FALSE;
}
//
// Set the Read Map register to a known state.
//
originalReadMap = VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
GRAPH_DATA_PORT);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_DATA_PORT, READ_MAP_TEST_SETTING);
if (VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
GRAPH_DATA_PORT) != READ_MAP_TEST_SETTING) {
//
// The Read Map setting we just performed can't be read back; not a
// VGA. Restore the default Read Map state.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_DATA_PORT, READ_MAP_DEFAULT);
return FALSE;
}
//
// Remember the original setting of the Bit Mask register.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_ADDRESS_PORT, IND_BIT_MASK);
if ((VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
GRAPH_ADDRESS_PORT) & GRAPH_ADDR_MASK) != IND_BIT_MASK) {
//
// The Graphics Address register setting we just made can't be read
// back; not a VGA. Restore the default Read Map state.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_ADDRESS_PORT, IND_READ_MAP);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_DATA_PORT, READ_MAP_DEFAULT);
return FALSE;
}
originalBitMask = VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
GRAPH_DATA_PORT);
//
// Set up the initial test mask we'll write to and read from the Bit Mask.
//
testMask = 0xBB;
do {
//
// Write the test mask to the Bit Mask.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_DATA_PORT, testMask);
//
// Make sure the Bit Mask remembered the value.
//
if (VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
GRAPH_DATA_PORT) != testMask) {
//
// The Bit Mask is not properly writable and readable; not a VGA.
// Restore the Bit Mask and Read Map to their default states.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_DATA_PORT, BIT_MASK_DEFAULT);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_ADDRESS_PORT, IND_READ_MAP);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_DATA_PORT, READ_MAP_DEFAULT);
return FALSE;
}
//
// Cycle the mask for next time.
//
testMask >>= 1;
} while (testMask != 0);
//
// There's something readable at GRAPH_DATA_PORT; now switch back and
// make sure that the Read Map register hasn't changed, to verify that
// we're dealing with indexed registers.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_ADDRESS_PORT, IND_READ_MAP);
if (VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
GRAPH_DATA_PORT) != READ_MAP_TEST_SETTING) {
//
// The Read Map is not properly writable and readable; not a VGA.
// Restore the Bit Mask and Read Map to their default states, in case
// this is an EGA, so subsequent writes to the screen aren't garbled.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_DATA_PORT, READ_MAP_DEFAULT);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_ADDRESS_PORT, IND_BIT_MASK);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_DATA_PORT, BIT_MASK_DEFAULT);
return FALSE;
}
//
// We've pretty surely verified the existence of the Bit Mask register.
// Put the Graphics Controller back to the original state.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_DATA_PORT, originalReadMap);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_ADDRESS_PORT, IND_BIT_MASK);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_DATA_PORT, originalBitMask);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_ADDRESS_PORT, originalGCAddr);
//
// Now, check for the existence of the Chain4 bit.
//
//
// Remember the original states of the Sequencer Address and Memory Mode
// registers.
//
originalSCAddr = VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT, IND_MEMORY_MODE);
if ((VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT) & SEQ_ADDR_MASK) != IND_MEMORY_MODE) {
//
// Couldn't read back the Sequencer Address register setting we just
// performed.
//
return FALSE;
}
originalMemoryMode = VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
SEQ_DATA_PORT);
//
// Toggle the Chain4 bit and read back the result. This must be done during
// sync reset, since we're changing the chaining state.
//
//
// Begin sync reset.
//
VideoPortWritePortUshort((PUSHORT)(HwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT),
(IND_SYNC_RESET + (START_SYNC_RESET_VALUE << 8)));
//
// Toggle the Chain4 bit.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT, IND_MEMORY_MODE);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
SEQ_DATA_PORT, (UCHAR)(originalMemoryMode ^ CHAIN4_MASK));
if (VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
SEQ_DATA_PORT) != (UCHAR) (originalMemoryMode ^ CHAIN4_MASK)) {
//
// Chain4 bit not there; not a VGA.
// Set text mode default for Memory Mode register.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
SEQ_DATA_PORT, MEMORY_MODE_TEXT_DEFAULT);
//
// End sync reset.
//
VideoPortWritePortUshort((PUSHORT) (HwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT),
(IND_SYNC_RESET + (END_SYNC_RESET_VALUE << 8)));
returnStatus = FALSE;
} else {
//
// It's a VGA.
//
//
// Restore the original Memory Mode setting.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
SEQ_DATA_PORT, originalMemoryMode);
//
// End sync reset.
//
VideoPortWritePortUshort((PUSHORT)(HwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT),
(USHORT)(IND_SYNC_RESET + (END_SYNC_RESET_VALUE << 8)));
//
// Restore the original Sequencer Address setting.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT, originalSCAddr);
returnStatus = TRUE;
}
return returnStatus;
} // VgaIsPresent()
VP_STATUS
VgaSetPaletteReg(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_PALETTE_DATA PaletteBuffer,
ULONG PaletteBufferSize
)
/*++
Routine Description:
This routine sets a specified portion of the EGA (not DAC) palette
registers.
Arguments:
HwDeviceExtension - Pointer to the miniport driver's device extension.
PaletteBuffer - Pointer to the structure containing the palette data.
PaletteBufferSize - Length of the input buffer supplied by the user.
Return Value:
NO_ERROR - information returned successfully
ERROR_INSUFFICIENT_BUFFER - input buffer not large enough for input data.
ERROR_INVALID_PARAMETER - invalid palette size.
--*/
{
USHORT i;
//
// Check if the size of the data in the input buffer is large enough.
//
if ((PaletteBufferSize) < (sizeof(VIDEO_PALETTE_DATA)) ||
(PaletteBufferSize < (sizeof(VIDEO_PALETTE_DATA) +
(sizeof(USHORT) * (PaletteBuffer->NumEntries -1)) ))) {
return ERROR_INSUFFICIENT_BUFFER;
}
//
// Check to see if the parameters are valid.
//
if ( (PaletteBuffer->FirstEntry > VIDEO_MAX_COLOR_REGISTER ) ||
(PaletteBuffer->NumEntries == 0) ||
(PaletteBuffer->FirstEntry + PaletteBuffer->NumEntries >
VIDEO_MAX_PALETTE_REGISTER + 1 ) ) {
return ERROR_INVALID_PARAMETER;
}
//
// Reset ATC to index mode
//
VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
ATT_INITIALIZE_PORT_COLOR);
//
// Blast out our palette values.
//
for (i = 0; i < PaletteBuffer->NumEntries; i++) {
VideoPortWritePortUchar(HwDeviceExtension->IOAddress + ATT_ADDRESS_PORT,
(UCHAR)(i+PaletteBuffer->FirstEntry));
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
ATT_DATA_WRITE_PORT,
(UCHAR)PaletteBuffer->Colors[i]);
}
VideoPortWritePortUchar(HwDeviceExtension->IOAddress + ATT_ADDRESS_PORT,
VIDEO_ENABLE);
return NO_ERROR;
} // end VgaSetPaletteReg()
VP_STATUS
VgaSetColorLookup(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_CLUT ClutBuffer,
ULONG ClutBufferSize
)
/*++
Routine Description:
This routine sets a specified portion of the DAC color lookup table
settings.
Arguments:
HwDeviceExtension - Pointer to the miniport driver's device extension.
ClutBufferSize - Length of the input buffer supplied by the user.
ClutBuffer - Pointer to the structure containing the color lookup table.
Return Value:
NO_ERROR - information returned successfully
ERROR_INSUFFICIENT_BUFFER - input buffer not large enough for input data.
ERROR_INVALID_PARAMETER - invalid clut size.
--*/
{
USHORT i;
//
// Check if the size of the data in the input buffer is large enough.
//
if ( (ClutBufferSize < sizeof(VIDEO_CLUT) - sizeof(ULONG)) ||
(ClutBufferSize < sizeof(VIDEO_CLUT) +
(sizeof(ULONG) * (ClutBuffer->NumEntries - 1)) ) ) {
return ERROR_INSUFFICIENT_BUFFER;
}
//
// Check to see if the parameters are valid.
//
if ( (ClutBuffer->NumEntries == 0) ||
(ClutBuffer->FirstEntry > VIDEO_MAX_COLOR_REGISTER) ||
(ClutBuffer->FirstEntry + ClutBuffer->NumEntries >
VIDEO_MAX_COLOR_REGISTER + 1) ) {
return ERROR_INVALID_PARAMETER;
}
//
// Set CLUT registers directly on the hardware
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
DAC_ADDRESS_WRITE_PORT,
(UCHAR) ClutBuffer->FirstEntry);
for (i = 0; i < ClutBuffer->NumEntries; i++) {
VideoPortWritePortBufferUchar((PUCHAR)HwDeviceExtension->IOAddress +
DAC_DATA_REG_PORT,
&(ClutBuffer->LookupTable[i].RgbArray.Red),
0x03);
}
return NO_ERROR;
} // end VgaSetColorLookup()
VP_STATUS
VgaRestoreHardwareState(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_HARDWARE_STATE HardwareState,
ULONG HardwareStateSize
)
/*++
Routine Description:
Restores all registers and memory of the VGA.
Note: HardwareState points to the actual buffer from which the state
is to be restored. This buffer will always be big enough (we specified
the required size at DriverEntry).
Note: The offset in the hardware state header from which each general
register is restored is the offset of the write address of that register
from the base I/O address of the VGA.
Arguments:
HwDeviceExtension - Pointer to the miniport driver's device extension.
HardwareState - Pointer to a structure from which the saved state is to be
restored (actually only info about and a pointer to the actual save
buffer).
HardwareStateSize - Length of the input buffer supplied by the user.
(Actually only the size of the HardwareState structure, not the
buffer it points to from which the state is actually restored. The
pointed-to buffer is assumed to be big enough.)
Return Value:
NO_ERROR - restore performed successfully
ERROR_INSUFFICIENT_BUFFER - input buffer not large enough to provide data
--*/
{
PVIDEO_HARDWARE_STATE_HEADER hardwareStateHeader;
ULONG i;
UCHAR dummy;
PUCHAR pScreen;
PUCHAR pucLatch;
PULONG pulBuffer;
PUCHAR port;
PUCHAR portValue;
PUCHAR portValueDAC;
ULONG bIsColor;
//
// Check if the size of the data in the input buffer is large enough.
//
if ((HardwareStateSize < sizeof(VIDEO_HARDWARE_STATE)) ||
(HardwareState->StateLength < VGA_TOTAL_STATE_SIZE)) {
return ERROR_INSUFFICIENT_BUFFER;
}
//
// Point to the buffer where the restore data is actually stored.
//
hardwareStateHeader = HardwareState->StateHeader;
//
// Make sure the offset are in the structure ...
//
if ((hardwareStateHeader->BasicSequencerOffset + VGA_NUM_SEQUENCER_PORTS >
HardwareState->StateLength) ||
(hardwareStateHeader->BasicCrtContOffset + VGA_NUM_CRTC_PORTS >
HardwareState->StateLength) ||
(hardwareStateHeader->BasicGraphContOffset + VGA_NUM_GRAPH_CONT_PORTS >
HardwareState->StateLength) ||
(hardwareStateHeader->BasicAttribContOffset + VGA_NUM_ATTRIB_CONT_PORTS >
HardwareState->StateLength) ||
(hardwareStateHeader->BasicDacOffset + (3 * VGA_NUM_DAC_ENTRIES) >
HardwareState->StateLength) ||
(hardwareStateHeader->BasicLatchesOffset + 4 >
HardwareState->StateLength) ||
(hardwareStateHeader->ExtendedSequencerOffset + EXT_NUM_SEQUENCER_PORTS >
HardwareState->StateLength) ||
(hardwareStateHeader->ExtendedCrtContOffset + EXT_NUM_CRTC_PORTS >
HardwareState->StateLength) ||
(hardwareStateHeader->ExtendedGraphContOffset + EXT_NUM_GRAPH_CONT_PORTS >
HardwareState->StateLength) ||
(hardwareStateHeader->ExtendedAttribContOffset + EXT_NUM_ATTRIB_CONT_PORTS >
HardwareState->StateLength) ||
(hardwareStateHeader->ExtendedDacOffset + (4 * EXT_NUM_DAC_ENTRIES) >
HardwareState->StateLength) ||
//
// Only check the validator state offset if there is unemulated data.
//
((hardwareStateHeader->VGAStateFlags & VIDEO_STATE_UNEMULATED_VGA_STATE) &&
(hardwareStateHeader->ExtendedValidatorStateOffset + VGA_VALIDATOR_AREA_SIZE >
HardwareState->StateLength)) ||
(hardwareStateHeader->ExtendedMiscDataOffset + VGA_MISC_DATA_AREA_OFFSET >
HardwareState->StateLength) ||
(hardwareStateHeader->Plane1Offset + hardwareStateHeader->PlaneLength >
HardwareState->StateLength) ||
(hardwareStateHeader->Plane2Offset + hardwareStateHeader->PlaneLength >
HardwareState->StateLength) ||
(hardwareStateHeader->Plane3Offset + hardwareStateHeader->PlaneLength >
HardwareState->StateLength) ||
(hardwareStateHeader->Plane4Offset + hardwareStateHeader->PlaneLength >
HardwareState->StateLength) ||
(hardwareStateHeader->DIBOffset +
hardwareStateHeader->DIBBitsPerPixel / 8 *
hardwareStateHeader->DIBXResolution *
hardwareStateHeader->DIBYResolution > HardwareState->StateLength) ||
(hardwareStateHeader->DIBXlatOffset + hardwareStateHeader->DIBXlatLength >
HardwareState->StateLength)) {
return ERROR_INVALID_PARAMETER;
}
//
// Turn off the screen to avoid flickering. The screen will turn back on
// when we restore the DAC state at the end of this routine.
//
// Wait for the leading edge of vertical sync, to blank the screen cleanly.
//
if (VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
MISC_OUTPUT_REG_READ_PORT) & 0x01) {
port = INPUT_STATUS_1_COLOR + HwDeviceExtension->IOAddress;
} else {
port = INPUT_STATUS_1_MONO + HwDeviceExtension->IOAddress;
}
// while (VideoPortReadPortUchar(port) & 0x08)
// ; // wait for not vertical sync
// while (!(VideoPortReadPortUchar(port) & 0x08))
// ; // wait for vertical sync
//
// Set DAC register 0 to display black.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
DAC_ADDRESS_WRITE_PORT, 0);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
DAC_DATA_REG_PORT, 0);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
DAC_DATA_REG_PORT, 0);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
DAC_DATA_REG_PORT, 0);
//
// Set the DAC mask register to force DAC register 0 to display all the
// time (this is the register we just set to display black). From now on,
// nothing but black will show up on the screen.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
DAC_PIXEL_MASK_PORT, 0);
//
// Restore the latches and the contents of display memory.
//
// Set up the VGA's hardware to allow us to copy to each plane in turn.
//
// Begin sync reset.
//
VideoPortWritePortUshort((PUSHORT) (HwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT),
(USHORT) (IND_SYNC_RESET + (START_SYNC_RESET_VALUE << 8)));
//
// Turn off Chain mode and map display memory at A0000 for 64K.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_ADDRESS_PORT, IND_GRAPH_MISC);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_DATA_PORT, (UCHAR) ((VideoPortReadPortUchar(
HwDeviceExtension->IOAddress + GRAPH_DATA_PORT) & 0xF1) | 0x04));
//
// Turn off Chain4 mode and odd/even.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT, IND_MEMORY_MODE);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
SEQ_DATA_PORT,
(UCHAR) ((VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
SEQ_DATA_PORT) & 0xF3) | 0x04));
//
// End sync reset.
//
VideoPortWritePortUshort((PUSHORT) (HwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT), (USHORT) (IND_SYNC_RESET +
(END_SYNC_RESET_VALUE << 8)));
//
// Set the write mode to 0, the read mode to 0, and turn off odd/even.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_ADDRESS_PORT, IND_GRAPH_MODE);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_DATA_PORT,
(UCHAR) ((VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
GRAPH_DATA_PORT) & 0xE4) | 0x00));
//
// Set the Bit Mask to 0xFF to allow all CPU bits through.
//
VideoPortWritePortUshort((PUSHORT) (HwDeviceExtension->IOAddress +
GRAPH_ADDRESS_PORT), (USHORT) (IND_BIT_MASK + (0xFF << 8)));
//
// Set the Data Rotation and Logical Function fields to 0 to allow CPU
// data through unmodified.
//
VideoPortWritePortUshort((PUSHORT)(HwDeviceExtension->IOAddress +
GRAPH_ADDRESS_PORT), (USHORT) (IND_DATA_ROTATE + (0 << 8)));
//
// Set Set/Reset Enable to 0 to select CPU data for all planes.
//
VideoPortWritePortUshort((PUSHORT) (HwDeviceExtension->IOAddress +
GRAPH_ADDRESS_PORT), (USHORT) (IND_SET_RESET_ENABLE + (0 << 8)));
//
// Point the Sequencer Index to the Map Mask register.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT, IND_MAP_MASK);
//
// Restore the latches.
//
// Point to the saved data for the first latch.
//
pucLatch = ((PUCHAR) (hardwareStateHeader)) +
hardwareStateHeader->BasicLatchesOffset;
//
// Point to first byte of display memory.
//
pScreen = (PUCHAR) HwDeviceExtension->VideoMemoryAddress;
//
// Write the contents to be restored to each of the four latches in turn.
//
for (i = 0; i < 4; i++) {
//
// Set the Map Mask to select the plane we want to restore next.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
SEQ_DATA_PORT, (UCHAR)(1<<i));
//
// Write this plane's latch.
//
VideoPortWriteRegisterUchar(pScreen, *pucLatch++);
}
//
// Read the latched data into the latches, and the latches are set.
//
dummy = VideoPortReadRegisterUchar(pScreen);
//
// Point to the offset of the saved data for the first plane.
//
pulBuffer = &(hardwareStateHeader->Plane1Offset);
//
// Restore each of the four planes in turn.
//
for (i = 0; i < 4; i++) {
//
// Set the Map Mask to select the plane we want to restore next.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
SEQ_DATA_PORT, (UCHAR)(1<<i));
//
// Restore this plane from the buffer.
//
VideoPortMoveMemory((PUCHAR) HwDeviceExtension->VideoMemoryAddress,
((PUCHAR) (hardwareStateHeader)) + *pulBuffer,
hardwareStateHeader->PlaneLength);
pulBuffer++;
}
//
// If we have some unemulated data, put it back into the buffer
//
if (hardwareStateHeader->VGAStateFlags & VIDEO_STATE_UNEMULATED_VGA_STATE) {
if (!hardwareStateHeader->ExtendedValidatorStateOffset) {
return ERROR_INVALID_PARAMETER;
}
//
// Get the right offset in the struct and save all the data associated
// with the trapped validator data.
//
VideoPortMoveMemory(&(HwDeviceExtension->TrappedValidatorCount),
((PUCHAR) (hardwareStateHeader)) +
hardwareStateHeader->ExtendedValidatorStateOffset,
VGA_VALIDATOR_AREA_SIZE);
//
// Check to see if this is an appropriate access range.
// We are trapping - so we must have the trapping access range enabled.
//
if (((HwDeviceExtension->CurrentVdmAccessRange != FullVgaValidatorAccessRange) ||
(HwDeviceExtension->CurrentNumVdmAccessRanges != NUM_FULL_VGA_VALIDATOR_ACCESS_RANGE)) &&
((HwDeviceExtension->CurrentVdmAccessRange != MinimalVgaValidatorAccessRange) ||
(HwDeviceExtension->CurrentNumVdmAccessRanges != NUM_MINIMAL_VGA_VALIDATOR_ACCESS_RANGE))) {
return ERROR_INVALID_PARAMETER;
}
VideoPortSetTrappedEmulatorPorts(HwDeviceExtension,
HwDeviceExtension->CurrentNumVdmAccessRanges,
HwDeviceExtension->CurrentVdmAccessRange);
}
//
// Set the critical registers (clock and timing states) during sync reset.
//
// Begin sync reset.
//
VideoPortWritePortUshort((PUSHORT) (HwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT), (USHORT) (IND_SYNC_RESET +
(START_SYNC_RESET_VALUE << 8)));
//
// Restore the Miscellaneous Output register.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
MISC_OUTPUT_REG_WRITE_PORT,
(UCHAR) (hardwareStateHeader->PortValue[MISC_OUTPUT_REG_WRITE_PORT] & 0xF7));
//
// Restore all Sequencer registers except the Sync Reset register, which
// is always not in reset (except when we send out a batched sync reset
// register set, but that can't be interrupted, so we know we're never in
// sync reset at save/restore time).
//
portValue = ((PUCHAR) hardwareStateHeader) +
hardwareStateHeader->BasicSequencerOffset + 1;
for (i = 1; i < VGA_NUM_SEQUENCER_PORTS; i++) {
VideoPortWritePortUshort((PUSHORT) (HwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT), (USHORT) (i + ((*portValue++) << 8)) );
}
//
// Restore the Graphics Controller Miscellaneous register, which contains
// the Chain bit.
//
portValue = ((PUCHAR) hardwareStateHeader) +
hardwareStateHeader->BasicGraphContOffset + IND_GRAPH_MISC;
VideoPortWritePortUshort((PUSHORT) (HwDeviceExtension->IOAddress +
GRAPH_ADDRESS_PORT), (USHORT)(IND_GRAPH_MISC + (*portValue << 8)));
//
// End sync reset.
//
VideoPortWritePortUshort((PUSHORT) (HwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT), (USHORT) (IND_SYNC_RESET +
(END_SYNC_RESET_VALUE << 8)));
//
// Figure out if color/mono switchable registers are at 3BX or 3DX.
// At the same time, save the state of the Miscellaneous Output register
// which is read from 3CC but written at 3C2.
//
if (hardwareStateHeader->PortValue[MISC_OUTPUT_REG_WRITE_PORT] & 0x01) {
bIsColor = TRUE;
} else {
bIsColor = FALSE;
}
//
// Restore the CRT Controller indexed registers.
//
// Unlock CRTC registers 0-7.
//
portValue = (PUCHAR) hardwareStateHeader +
hardwareStateHeader->BasicCrtContOffset;
if (bIsColor) {
VideoPortWritePortUshort((PUSHORT) (HwDeviceExtension->IOAddress +
CRTC_ADDRESS_PORT_COLOR), (USHORT) (IND_CRTC_PROTECT +
(((*(portValue + IND_CRTC_PROTECT)) & 0x7F) << 8)));
} else {
VideoPortWritePortUshort((PUSHORT) (HwDeviceExtension->IOAddress +
CRTC_ADDRESS_PORT_MONO), (USHORT) (IND_CRTC_PROTECT +
(((*(portValue + IND_CRTC_PROTECT)) & 0x7F) << 8)));
}
//
// Now restore the CRTC registers.
//
for (i = 0; i < VGA_NUM_CRTC_PORTS; i++) {
if (bIsColor) {
VideoPortWritePortUshort((PUSHORT) (HwDeviceExtension->IOAddress +
CRTC_ADDRESS_PORT_COLOR),
(USHORT) (i + ((*portValue++) << 8)));
} else {
VideoPortWritePortUshort((PUSHORT) (HwDeviceExtension->IOAddress +
CRTC_ADDRESS_PORT_MONO),
(USHORT) (i + ((*portValue++) << 8)));
}
}
//
// Restore the Graphics Controller indexed registers.
//
portValue = (PUCHAR) hardwareStateHeader +
hardwareStateHeader->BasicGraphContOffset;
for (i = 0; i < VGA_NUM_GRAPH_CONT_PORTS; i++) {
VideoPortWritePortUshort((PUSHORT) (HwDeviceExtension->IOAddress +
GRAPH_ADDRESS_PORT), (USHORT) (i + ((*portValue++) << 8)));
}
//
// Restore the Attribute Controller indexed registers.
//
portValue = (PUCHAR) hardwareStateHeader +
hardwareStateHeader->BasicAttribContOffset;
//
// Reset the AC index/data toggle, then blast out all the register
// settings.
//
if (bIsColor) {
dummy = VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
INPUT_STATUS_1_COLOR);
} else {
dummy = VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
INPUT_STATUS_1_MONO);
}
for (i = 0; i < VGA_NUM_ATTRIB_CONT_PORTS; i++) {
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
ATT_ADDRESS_PORT, (UCHAR)i);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
ATT_DATA_WRITE_PORT, *portValue++);
}
//
// Restore DAC registers 1 through 255. We'll do register 0, the DAC Mask,
// and the index registers later.
//
// Wait for the leading edge of vertical sync, so we can read out the DAC
// registers without causing sparkles on the screen.
//
if (bIsColor) {
port = HwDeviceExtension->IOAddress + INPUT_STATUS_1_COLOR;
} else {
port = HwDeviceExtension->IOAddress + INPUT_STATUS_1_MONO;
}
// while (VideoPortReadPortUchar(port) & 0x08)
// ; // wait for not vertical sync
// while (!(VideoPortReadPortUchar(port) & 0x08))
// ; // wait for vertical sync
//
// Set the Write Index to one, to write to DAC register 1 first (we'll do
// register 0 later), then read out the 255 DAC registers other than
// register 0. Each successive three writes set Red, Green, and Blue
// components for that register, then the index autoincrements.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
DAC_ADDRESS_WRITE_PORT, 1);
VideoPortWritePortBufferUchar(HwDeviceExtension->IOAddress +
DAC_DATA_REG_PORT, (PUCHAR) hardwareStateHeader +
hardwareStateHeader->BasicDacOffset + 3,
(VGA_NUM_DAC_ENTRIES - 1) * 3);
//
// Extended registers are not supported in this driver.
//
//
// Restore the Feature Control register.
//
if (bIsColor) {
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
FEAT_CTRL_WRITE_PORT_COLOR,
hardwareStateHeader->PortValue[FEAT_CTRL_WRITE_PORT_COLOR]);
} else {
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
FEAT_CTRL_WRITE_PORT_MONO,
hardwareStateHeader->PortValue[FEAT_CTRL_WRITE_PORT_MONO]);
}
//
// Restore the Sequencer Index.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT,
hardwareStateHeader->PortValue[SEQ_ADDRESS_PORT]);
//
// Restore the CRT Controller Index.
//
if (bIsColor) {
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
CRTC_ADDRESS_PORT_COLOR,
hardwareStateHeader->PortValue[CRTC_ADDRESS_PORT_COLOR]);
} else {
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
CRTC_ADDRESS_PORT_MONO,
hardwareStateHeader->PortValue[CRTC_ADDRESS_PORT_MONO]);
}
//
// Restore the Graphics Controller Index.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_ADDRESS_PORT,
hardwareStateHeader->PortValue[GRAPH_ADDRESS_PORT]);
//
// Restore the Attribute Controller Index and index/data toggle state.
//
if (bIsColor) {
port = HwDeviceExtension->IOAddress + INPUT_STATUS_1_COLOR;
} else {
port = HwDeviceExtension->IOAddress + INPUT_STATUS_1_MONO;
}
VideoPortReadPortUchar(port); // reset the toggle to Index state
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
ATT_ADDRESS_PORT, // restore the AC Index
hardwareStateHeader->PortValue[ATT_ADDRESS_PORT]);
//
// If the toggle should be in Data state, we're all set. If it should be in
// Index state, reset it to that condition.
//
if (hardwareStateHeader->AttribIndexDataState == 0) {
//
// Reset the toggle to Index state.
//
VideoPortReadPortUchar(port);
}
//
// Restore DAC register 0 and the DAC Mask, to unblank the screen.
//
portValueDAC = (PUCHAR) hardwareStateHeader +
hardwareStateHeader->BasicDacOffset;
//
// Restore the DAC Mask register.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
DAC_PIXEL_MASK_PORT,
hardwareStateHeader->PortValue[DAC_PIXEL_MASK_PORT]);
//
// Restore DAC register 0.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
DAC_ADDRESS_WRITE_PORT, 0);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
DAC_DATA_REG_PORT, *portValueDAC++);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
DAC_DATA_REG_PORT, *portValueDAC++);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
DAC_DATA_REG_PORT, *portValueDAC++);
//
// Restore the read/write state and the current index of the DAC.
//
// See whether the Read or Write Index was written to most recently.
// (The upper nibble stored at DAC_STATE_PORT is the # of reads/writes
// for the current index.)
//
if ((hardwareStateHeader->PortValue[DAC_STATE_PORT] & 0x0F) == 3) {
//
// The DAC Read Index was written to last. Restore the DAC by setting
// up to read from the saved index - 1, because the way the Read
// Index works is that it autoincrements after reading, so you actually
// end up reading the data for the index you read at the DAC Write
// Mask register - 1.
//
// Set the Read Index to the index we read, minus 1, accounting for
// wrap from 255 back to 0. The DAC hardware immediately reads this
// register into a temporary buffer, then adds 1 to the index.
//
if (hardwareStateHeader->PortValue[DAC_ADDRESS_WRITE_PORT] == 0) {
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
DAC_ADDRESS_READ_PORT, 255);
} else {
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
DAC_ADDRESS_READ_PORT, (UCHAR)
(hardwareStateHeader->PortValue[DAC_ADDRESS_WRITE_PORT] -
1));
}
//
// Now read the hardware however many times are required to get to
// the partial read state we saved.
//
for (i = hardwareStateHeader->PortValue[DAC_STATE_PORT] >> 4;
i > 0; i--) {
dummy = VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
DAC_DATA_REG_PORT);
}
} else {
//
// The DAC Write Index was written to last. Set the Write Index to the
// index value we read out of the DAC. Then, if a partial write
// (partway through an RGB triplet) was in place, write the partial
// values, which we obtained by writing them to the current DAC
// register. This DAC register will be wrong until the write is
// completed, but at least the values will be right once the write is
// finished, and most importantly we won't have messed up the sequence
// of RGB writes (which can be as long as 768 in a row).
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
DAC_ADDRESS_WRITE_PORT,
hardwareStateHeader->PortValue[DAC_ADDRESS_WRITE_PORT]);
//
// Now write to the hardware however many times are required to get to
// the partial write state we saved (if any).
//
// Point to the saved value for the DAC register that was in the
// process of being written to; we wrote the partial value out, so now
// we can restore it.
//
portValueDAC = (PUCHAR) hardwareStateHeader +
hardwareStateHeader->BasicDacOffset +
(hardwareStateHeader->PortValue[DAC_ADDRESS_WRITE_PORT] * 3);
for (i = hardwareStateHeader->PortValue[DAC_STATE_PORT] >> 4;
i > 0; i--) {
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
DAC_DATA_REG_PORT, *portValueDAC++);
}
}
return NO_ERROR;
} // end VgaRestoreHardwareState()
VP_STATUS
VgaSaveHardwareState(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_HARDWARE_STATE HardwareState,
ULONG HardwareStateSize,
PULONG OutputSize
)
/*++
Routine Description:
Saves all registers and memory of the VGA.
Note: HardwareState points to the actual buffer in which the state
is saved. This buffer will always be big enough (we specified
the required size at DriverEntry).
Note: This routine leaves registers in any state it cares to, except
that it will not mess with any of the CRT or Sequencer parameters that
might make the monitor unhappy. It leaves the screen blanked by setting
the DAC Mask and DAC register 0 to all zero values. The next video
operation we expect after this is a mode set to take us back to Win32.
Note: The offset in the hardware state header in which each general
register is saved is the offset of the write address of that register from
the base I/O address of the VGA.
Arguments:
HwDeviceExtension - Pointer to the miniport driver's device extension.
HardwareState - Pointer to a structure in which the saved state will be
returned (actually only info about and a pointer to the actual save
buffer).
HardwareStateSize - Length of the output buffer supplied by the user.
(Actually only the size of the HardwareState structure, not the
buffer it points to where the state is actually saved. The pointed-
to buffer is assumed to be big enough.)
OutputSize - Pointer to a buffer in which to return the actual size of
the data returned in the buffer.
Return Value:
NO_ERROR - information returned successfully
ERROR_INSUFFICIENT_BUFFER - output buffer not large enough to return
any useful data
--*/
{
PVIDEO_HARDWARE_STATE_HEADER hardwareStateHeader;
PUCHAR port;
PUCHAR pScreen;
PUCHAR portValue;
PUCHAR portValueDAC;
PUCHAR bufferPointer;
ULONG i;
UCHAR dummy, originalACIndex, originalACData;
UCHAR ucCRTC03;
ULONG bIsColor;
//
// See if the buffer is big enough to hold the hardware state structure.
// (This is only the HardwareState structure itself, not the buffer it
// points to.)
//
if (HardwareStateSize < sizeof(VIDEO_HARDWARE_STATE) ) {
*OutputSize = 0; // nothing returned
return ERROR_INSUFFICIENT_BUFFER;
}
//
// Amount of data we're going to return in the output buffer.
// (The VIDEO_HARDWARE_STATE in the output buffer points to the actual
// buffer in which the state is stored, which is assumed to be large
// enough.)
//
*OutputSize = sizeof(VIDEO_HARDWARE_STATE);
//
// Indicate the size of the full state save info.
//
HardwareState->StateLength = VGA_TOTAL_STATE_SIZE;
//
// hardwareStateHeader is a structure of offsets at the start of the
// actual save area that indicates the locations in which various VGA
// register and memory components are saved.
//
hardwareStateHeader = HardwareState->StateHeader;
//
// Zero out the structure.
//
VideoPortZeroMemory(hardwareStateHeader, sizeof(VIDEO_HARDWARE_STATE_HEADER));
//
// Set the Length field, which is basically a version ID.
//
hardwareStateHeader->Length = sizeof(VIDEO_HARDWARE_STATE_HEADER);
//
// Set the basic register offsets properly.
//
hardwareStateHeader->BasicSequencerOffset = VGA_BASIC_SEQUENCER_OFFSET;
hardwareStateHeader->BasicCrtContOffset = VGA_BASIC_CRTC_OFFSET;
hardwareStateHeader->BasicGraphContOffset = VGA_BASIC_GRAPH_CONT_OFFSET;
hardwareStateHeader->BasicAttribContOffset = VGA_BASIC_ATTRIB_CONT_OFFSET;
hardwareStateHeader->BasicDacOffset = VGA_BASIC_DAC_OFFSET;
hardwareStateHeader->BasicLatchesOffset = VGA_BASIC_LATCHES_OFFSET;
//
// Figure out if color/mono switchable registers are at 3BX or 3DX.
// At the same time, save the state of the Miscellaneous Output register
// which is read from 3CC but written at 3C2.
//
if ((hardwareStateHeader->PortValue[MISC_OUTPUT_REG_WRITE_PORT] =
VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
MISC_OUTPUT_REG_READ_PORT))
& 0x01) {
bIsColor = TRUE;
} else {
bIsColor = FALSE;
}
//
// Force the video subsystem enable state to enabled.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
VIDEO_SUBSYSTEM_ENABLE_PORT, 1);
//
// Save the DAC state first, so we can set the DAC to blank the screen
// so nothing after this shows up at all.
//
// Save the DAC Mask register.
//
hardwareStateHeader->PortValue[DAC_PIXEL_MASK_PORT] =
VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
DAC_PIXEL_MASK_PORT);
//
// Save the DAC Index register. Note that there is actually only one DAC
// Index register, which functions as either the Read Index or the Write
// Index as needed.
//
hardwareStateHeader->PortValue[DAC_ADDRESS_WRITE_PORT] =
VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
DAC_ADDRESS_WRITE_PORT);
//
// Save the DAC read/write state. We determine if the DAC has been written
// to or read from at the current index 0, 1, or 2 times (the application
// is in the middle of reading or writing a DAC register triplet if the
// count is 1 or 2), and save enough info so we can restore things
// properly. The only hole is if the application writes to the Write Index,
// then reads from instead of writes to the Data register, or vice-versa,
// or if they do a partial read write, then never finish it.
// This is fairly ridiculous behavior, however, and anyway there's nothing
// we can do about it.
//
hardwareStateHeader->PortValue[DAC_STATE_PORT] =
VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
DAC_STATE_PORT);
if (hardwareStateHeader->PortValue[DAC_STATE_PORT] == 3) {
//
// The DAC Read Index was written to last. Figure out how many reads
// have been done from the current index. We'll restart this on restore
// by setting the Read Index to the current index - 1 (the read index
// is one greater than the index being read), then doing the proper
// number of reads.
//
// Read the Data register once, and see if the index changes.
//
dummy = VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
DAC_DATA_REG_PORT);
if (VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
DAC_ADDRESS_WRITE_PORT) !=
hardwareStateHeader->PortValue[DAC_ADDRESS_WRITE_PORT]) {
//
// The DAC Index changed, so two reads had already been done from
// the current index. Store the count "2" in the upper nibble of
// the read/write state field.
//
hardwareStateHeader->PortValue[DAC_STATE_PORT] |= 0x20;
} else {
//
// Read the Data register again, and see if the index changes.
//
dummy = VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
DAC_DATA_REG_PORT);
if (VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
DAC_ADDRESS_WRITE_PORT) !=
hardwareStateHeader->PortValue[DAC_ADDRESS_WRITE_PORT]) {
//
// The DAC Index changed, so one read had already been done
// from the current index. Store the count "1" in the upper
// nibble of the read/write state field.
//
hardwareStateHeader->PortValue[DAC_STATE_PORT] |= 0x10;
}
//
// If neither 2 nor 1 reads had been done from the current index,
// then 0 reads were done, and we're all set, since the upper
// nibble of the read/write state field is already 0.
//
}
} else {
//
// The DAC Write Index was written to last. Figure out how many writes
// have been done to the current index. We'll restart this on restore
// by setting the Write Index to the proper index, then doing the
// proper number of writes. When we do the DAC register save, we'll
// read out the value that gets written (if there was a partial write
// in progress), so we can restore the proper data later. This will
// cause this current DAC location to be briefly wrong in the 1- and
// 2-bytes-written case (until the app finishes the write), but that's
// better than having the wrong DAC values written for good.
//
// Write the Data register once, and see if the index changes.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
DAC_DATA_REG_PORT, 0);
if (VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
DAC_ADDRESS_WRITE_PORT) !=
hardwareStateHeader->PortValue[DAC_ADDRESS_WRITE_PORT]) {
//
// The DAC Index changed, so two writes had already been done to
// the current index. Store the count "2" in the upper nibble of
// the read/write state field.
//
hardwareStateHeader->PortValue[DAC_STATE_PORT] |= 0x20;
} else {
//
// Write the Data register again, and see if the index changes.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
DAC_DATA_REG_PORT, 0);
if (VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
DAC_ADDRESS_WRITE_PORT) !=
hardwareStateHeader->PortValue[DAC_ADDRESS_WRITE_PORT]) {
//
// The DAC Index changed, so one write had already been done
// to the current index. Store the count "1" in the upper
// nibble of the read/write state field.
//
hardwareStateHeader->PortValue[DAC_STATE_PORT] |= 0x10;
}
//
// If neither 2 nor 1 writes had been done to the current index,
// then 0 writes were done, and we're all set.
//
}
}
//
// Now, read out the 256 18-bit DAC palette registers (256 RGB triplets),
// and blank the screen.
//
portValueDAC = (PUCHAR) hardwareStateHeader + VGA_BASIC_DAC_OFFSET;
//
// Read out DAC register 0, so we can set it to black.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
DAC_ADDRESS_READ_PORT, 0);
*portValueDAC++ = VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
DAC_DATA_REG_PORT);
*portValueDAC++ = VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
DAC_DATA_REG_PORT);
*portValueDAC++ = VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
DAC_DATA_REG_PORT);
//
// Set DAC register 0 to display black.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
DAC_ADDRESS_WRITE_PORT, 0);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
DAC_DATA_REG_PORT, 0);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
DAC_DATA_REG_PORT, 0);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
DAC_DATA_REG_PORT, 0);
//
// Set the DAC mask register to force DAC register 0 to display all the
// time (this is the register we just set to display black). From now on,
// nothing but black will show up on the screen.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
DAC_PIXEL_MASK_PORT, 0);
//
// Wait until we've gotten the Attribute Controller toggle state to save
// the rest of the DAC registers, so we can wait for vertical sync.
//
//
// Read out the Attribute Controller Index state, and deduce the Index/Data
// toggle state at the same time.
//
// Save the state of the Attribute Controller, both Index and Data,
// so we can test in which state the toggle currently is.
//
originalACIndex = hardwareStateHeader->PortValue[ATT_ADDRESS_PORT] =
VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
ATT_ADDRESS_PORT);
originalACData = VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
ATT_DATA_READ_PORT);
//
// Sequencer Index.
//
hardwareStateHeader->PortValue[SEQ_ADDRESS_PORT] =
VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT);
//
// Begin sync reset, just in case this is an SVGA and the currently
// indexed Attribute Controller register controls clocking stuff (a
// normal VGA won't require this).
//
VideoPortWritePortUshort((PUSHORT) (HwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT),
(USHORT) (IND_SYNC_RESET + (START_SYNC_RESET_VALUE << 8)));
//
// Now, write a different Index setting to the Attribute Controller, and
// see if the Index changes.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
ATT_ADDRESS_PORT, (UCHAR) (originalACIndex ^ 0x10));
if (VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
ATT_ADDRESS_PORT) == originalACIndex) {
//
// The Index didn't change, so the toggle was in the Data state.
//
hardwareStateHeader->AttribIndexDataState = 1;
//
// Restore the original Data state; we just corrupted it, and we need
// to read it out later; also, it may glitch the screen if not
// corrected. The toggle is already in the Index state.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
ATT_ADDRESS_PORT, originalACIndex);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
ATT_DATA_WRITE_PORT, originalACData);
} else {
//
// The Index did change, so the toggle was in the Index state.
// No need to restore anything, because the Data register didn't
// change, and we've already read out the Index register.
//
hardwareStateHeader->AttribIndexDataState = 0;
}
//
// End sync reset.
//
VideoPortWritePortUshort((PUSHORT) (HwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT),
(USHORT) (IND_SYNC_RESET + (END_SYNC_RESET_VALUE << 8)));
//
// Save the rest of the DAC registers.
//
// Wait for the leading edge of vertical sync, so we can read out the DAC
// registers without causing sparkles on the screen.
//
if (bIsColor) {
port = HwDeviceExtension->IOAddress + INPUT_STATUS_1_COLOR;
} else {
port = HwDeviceExtension->IOAddress + INPUT_STATUS_1_MONO;
}
// while (VideoPortReadPortUchar(port) & 0x08)
// ; // wait for not vertical sync
// while (!(VideoPortReadPortUchar(port) & 0x08))
// ; // wait for vertical sync
//
// Set the Read Index to one, to read DAC register 1 first (we already read
// register 0), then read out the other 255 DAC registers. Each successive
// three reads get Red, Green, and Blue components for that register, then
// the index autoincrements.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
DAC_ADDRESS_READ_PORT, 1);
VideoPortReadPortBufferUchar((PUCHAR) HwDeviceExtension->IOAddress +
DAC_DATA_REG_PORT, portValueDAC, (VGA_NUM_DAC_ENTRIES - 1) * 3);
//
// The Feature Control register is read from 3CA but written at 3BA/3DA.
//
if (bIsColor) {
hardwareStateHeader->PortValue[FEAT_CTRL_WRITE_PORT_COLOR] =
VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
FEAT_CTRL_READ_PORT);
} else {
hardwareStateHeader->PortValue[FEAT_CTRL_WRITE_PORT_MONO] =
VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
FEAT_CTRL_READ_PORT);
}
//
// CRT Controller Index.
//
if (bIsColor) {
hardwareStateHeader->PortValue[CRTC_ADDRESS_PORT_COLOR] =
VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
CRTC_ADDRESS_PORT_COLOR);
} else {
hardwareStateHeader->PortValue[CRTC_ADDRESS_PORT_MONO] =
VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
CRTC_ADDRESS_PORT_MONO);
}
//
// Graphics Controller Index.
//
hardwareStateHeader->PortValue[GRAPH_ADDRESS_PORT] =
VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
GRAPH_ADDRESS_PORT);
//
// Sequencer indexed registers.
//
portValue = ((PUCHAR) hardwareStateHeader) + VGA_BASIC_SEQUENCER_OFFSET;
for (i = 0; i < VGA_NUM_SEQUENCER_PORTS; i++) {
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT, (UCHAR)i);
*portValue++ = VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
SEQ_DATA_PORT);
}
//
// CRT Controller indexed registers.
//
//
// Remember the state of CRTC register 3, then force bit 7
// to 1 so we will read back the Vertical Retrace start and
// end registers rather than the light pen info.
//
if (bIsColor) {
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
CRTC_ADDRESS_PORT_COLOR, 3);
ucCRTC03 = VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
CRTC_DATA_PORT_COLOR);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
CRTC_DATA_PORT_COLOR, (UCHAR) (ucCRTC03 | 0x80));
} else {
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
CRTC_ADDRESS_PORT_MONO, 3);
ucCRTC03 = VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
CRTC_DATA_PORT_MONO);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
CRTC_DATA_PORT_MONO, (UCHAR) (ucCRTC03 | 0x80));
}
portValue = (PUCHAR) hardwareStateHeader + VGA_BASIC_CRTC_OFFSET;
for (i = 0; i < VGA_NUM_CRTC_PORTS; i++) {
if (bIsColor) {
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
CRTC_ADDRESS_PORT_COLOR, (UCHAR)i);
*portValue++ =
VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
CRTC_DATA_PORT_COLOR);
} else {
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
CRTC_ADDRESS_PORT_MONO, (UCHAR)i);
*portValue++ =
VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
CRTC_DATA_PORT_MONO);
}
}
portValue = (PUCHAR) hardwareStateHeader + VGA_BASIC_CRTC_OFFSET;
portValue[3] = ucCRTC03;
//
// Graphics Controller indexed registers.
//
portValue = (PUCHAR) hardwareStateHeader + VGA_BASIC_GRAPH_CONT_OFFSET;
for (i = 0; i < VGA_NUM_GRAPH_CONT_PORTS; i++) {
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_ADDRESS_PORT, (UCHAR)i);
*portValue++ = VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
GRAPH_DATA_PORT);
}
//
// Attribute Controller indexed registers.
//
portValue = (PUCHAR) hardwareStateHeader + VGA_BASIC_ATTRIB_CONT_OFFSET;
//
// For each indexed AC register, reset the flip-flop for reading the
// attribute register, then write the desired index to the AC Index,
// then read the value of the indexed register from the AC Data register.
//
for (i = 0; i < VGA_NUM_ATTRIB_CONT_PORTS; i++) {
if (bIsColor) {
dummy = VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
INPUT_STATUS_1_COLOR);
} else {
dummy = VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
INPUT_STATUS_1_MONO);
}
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
ATT_ADDRESS_PORT, (UCHAR)i);
*portValue++ = VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
ATT_DATA_READ_PORT);
}
//
// Save the latches. This destroys one byte of display memory in each
// plane, which is unfortunate but unavoidable. Chips that provide
// a way to read back the latches can avoid this problem.
//
// Set up the VGA's hardware so we can write the latches, then read them
// back.
//
//
// Begin sync reset.
//
VideoPortWritePortUshort((PUSHORT) (HwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT),
(USHORT) (IND_SYNC_RESET + (START_SYNC_RESET_VALUE << 8)));
//
// Set the Miscellaneous register to make sure we can access video RAM.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
MISC_OUTPUT_REG_WRITE_PORT, (UCHAR)(
hardwareStateHeader->PortValue[MISC_OUTPUT_REG_WRITE_PORT] |
0x02));
//
// Turn off Chain mode and map display memory at A0000 for 64K.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_ADDRESS_PORT, IND_GRAPH_MISC);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_DATA_PORT,
(UCHAR) ((VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
GRAPH_DATA_PORT) & 0xF1) | 0x04));
//
// Turn off Chain4 mode and odd/even.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT, IND_MEMORY_MODE);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
SEQ_DATA_PORT,
(UCHAR) ((VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
SEQ_DATA_PORT) & 0xF3) | 0x04));
//
// End sync reset.
//
VideoPortWritePortUshort((PUSHORT) (HwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT),
(USHORT) (IND_SYNC_RESET + (END_SYNC_RESET_VALUE << 8)));
//
// Set the Map Mask to write to all planes.
//
VideoPortWritePortUshort((PUSHORT) (HwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT), (USHORT) (IND_MAP_MASK + (0x0F << 8)));
//
// Set the write mode to 0, the read mode to 0, and turn off odd/even.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_ADDRESS_PORT, IND_GRAPH_MODE);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_DATA_PORT,
(UCHAR) ((VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
GRAPH_DATA_PORT) & 0xE4) | 0x01));
//
// Point to the last byte of display memory.
//
pScreen = (PUCHAR) HwDeviceExtension->VideoMemoryAddress +
VGA_PLANE_SIZE - 1;
//
// Write the latches to the last byte of display memory.
//
VideoPortWriteRegisterUchar(pScreen, 0);
//
// Cycle through the four planes, reading the latch data from each plane.
//
//
// Point the Graphics Controller Index to the Read Map register.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_ADDRESS_PORT, IND_READ_MAP);
portValue = (PUCHAR) hardwareStateHeader + VGA_BASIC_LATCHES_OFFSET;
for (i=0; i<4; i++) {
//
// Set the Read Map for the current plane.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_DATA_PORT, (UCHAR)i);
//
// Read the latched data we've written to memory.
//
*portValue++ = VideoPortReadRegisterUchar(pScreen);
}
//
// Set the VDM flags
// We are a standard VGA, and then check if we have unemulated state.
//
hardwareStateHeader->VGAStateFlags = 0;
if (HwDeviceExtension->TrappedValidatorCount) {
hardwareStateHeader->VGAStateFlags |= VIDEO_STATE_UNEMULATED_VGA_STATE;
//
// Save the VDM Emulator data
// No need to save the state of the seuencer port register for our
// emulated data since it may change when we come back. It will be
// recomputed.
//
hardwareStateHeader->ExtendedValidatorStateOffset = VGA_VALIDATOR_OFFSET;
VideoPortMoveMemory(((PUCHAR) (hardwareStateHeader)) +
hardwareStateHeader->ExtendedValidatorStateOffset,
&(HwDeviceExtension->TrappedValidatorCount),
VGA_VALIDATOR_AREA_SIZE);
} else {
hardwareStateHeader->ExtendedValidatorStateOffset = 0;
}
//
// Set the size of each plane.
//
hardwareStateHeader->PlaneLength = VGA_PLANE_SIZE;
//
// Store all the offsets for the planes in the structure.
//
hardwareStateHeader->Plane1Offset = VGA_PLANE_0_OFFSET;
hardwareStateHeader->Plane2Offset = VGA_PLANE_1_OFFSET;
hardwareStateHeader->Plane3Offset = VGA_PLANE_2_OFFSET;
hardwareStateHeader->Plane4Offset = VGA_PLANE_3_OFFSET;
//
// Now copy the contents of video VRAM into the buffer.
//
// The VGA hardware is already set up so that video memory is readable;
// we already turned off Chain mode, mapped in at A0000, turned off Chain4,
// turned off odd/even, and set read mode 0 when we saved the latches.
//
// Point the Graphics Controller Index to the Read Map register.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_ADDRESS_PORT, IND_READ_MAP);
//
// Point to the save area for the first plane.
//
bufferPointer = ((PUCHAR) (hardwareStateHeader)) +
hardwareStateHeader->Plane1Offset;
//
// Save the four planes consecutively.
//
for (i = 0; i < 4; i++) {
//
// Set the Read Map to select the plane we want to save next.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
GRAPH_DATA_PORT, (UCHAR)i);
//
// Copy this plane into the buffer.
//
VideoPortMoveMemory(bufferPointer,
(PUCHAR) HwDeviceExtension->VideoMemoryAddress,
VGA_PLANE_SIZE);
//
// Point to the next plane's save area.
//
bufferPointer += VGA_PLANE_SIZE;
}
return NO_ERROR;
} // end VgaSaveHardwareState()
VP_STATUS
VgaGetBankSelectCode(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_BANK_SELECT BankSelect,
ULONG BankSelectSize,
PULONG OutputSize
)
/*++
Routine Description:
Returns information needed in order for caller to implement bank
management.
Arguments:
HwDeviceExtension - Pointer to the miniport driver's device extension.
BankSelectMode - Pointer to a VIDEO_MODE structure in which is
passed the mode for which bank select data is to be returned (input
buffer).
BankSelectModeSize - Length of the input buffer supplied by the user.
BankSelect - Pointer to a VIDEO_BANK_SELECT structure in which the bank
select data will be returned (output buffer).
BankSelectSize - Length of the output buffer supplied by the user.
OutputSize - Pointer to a variable in which to return the actual size of
the data returned in the output buffer.
Return Value:
NO_ERROR - information returned successfully
ERROR_MORE_DATA - output buffer not large enough to hold all info (but
Size is returned, so caller can tell how large a buffer to allocate)
ERROR_INSUFFICIENT_BUFFER - output buffer not large enough to return
any useful data
ERROR_INVALID_PARAMETER - invalid video mode selection
--*/
{
ULONG codeSize;
ULONG codePlanarSize;
PUCHAR pCodeDest;
PUCHAR pCodeBank;
PUCHAR pCodePlanarBank;
ULONG AdapterType = HwDeviceExtension->AdapterType;
PVIDEOMODE pMode = HwDeviceExtension->CurrentMode;
//
// check if a mode has been set
//
if (HwDeviceExtension->CurrentMode == NULL) {
return ERROR_INVALID_FUNCTION;
}
//
// The minimum passed buffer size is a VIDEO_BANK_SELECT
// structure, so that we can return the required size; we can't do
// anything if we don't have at least that much buffer.
//
if (BankSelectSize < sizeof(VIDEO_BANK_SELECT)) {
return ERROR_INSUFFICIENT_BUFFER;
}
//
// Determine the banking type, and set whether any banking is actually
// supported in this mode.
//
BankSelect->BankingFlags = 0;
codeSize = 0;
codePlanarSize = 0;
pCodeBank = NULL;
switch(pMode->banktype) {
case NoBanking:
BankSelect->BankingType = VideoNotBanked;
BankSelect->Granularity = 0;
break;
case NormalBanking:
//
// The Vram supports independent 64K read and write banks in
// 16 color mode
//
BankSelect->BankingType = VideoBanked1R1W;
BankSelect->Granularity = 0x10000; // 64K bank start adjustment
pCodeBank = &BankSwitchStart;
codeSize = ((ULONG)&BankSwitchEnd) - ((ULONG)&BankSwitchStart);
break;
case PlanarHCBanking:
BankSelect->BankingFlags = PLANAR_HC; // planar mode supported
BankSelect->PlanarHCBankingType = pMode->VideoPlanarBank[AdapterType];
switch(BankSelect->PlanarHCBankingType) {
case VideoBanked2RW:
BankSelect->PlanarHCGranularity = 0x8000;
// 32K bank granularity
pCodePlanarBank = &PlanarHCBankSwitchStart256_2RW;
codePlanarSize = ((ULONG)&PlanarHCBankSwitchEnd256_2RW) -
((ULONG)&PlanarHCBankSwitchStart256_2RW);
break;
case VideoBanked1R1W:
BankSelect->PlanarHCGranularity = 0x10000;
// 64K bank granularity
pCodePlanarBank = &PlanarHCBankSwitchStart256;
codePlanarSize = ((ULONG)&PlanarHCBankSwitchEnd256) -
((ULONG)&PlanarHCBankSwitchStart256);
break;
default:
VideoDebugPrint((1, "Unsupported planar bank type\n"));
return ERROR_INVALID_PARAMETER;
break;
}
//
// Fall through to Normal256Banking...
//
case Normal256Banking:
BankSelect->BankingType = pMode->VideoBank[AdapterType];
switch(BankSelect->BankingType) {
case VideoBanked1RW:
BankSelect->Granularity = 0x10000; // 64K bank granularity
pCodeBank = &BankSwitchStart256;
codeSize = ((ULONG)&BankSwitchEnd256) -
((ULONG)&BankSwitchStart256);
break;
case VideoBanked2RW:
BankSelect->Granularity = 0x1000; // 4K bank granularity
pCodeBank = &BankSwitchStart256_2RW;
codeSize = ((ULONG)&BankSwitchEnd256_2RW) -
((ULONG)&BankSwitchStart256_2RW);
break;
default:
VideoDebugPrint((1, "Unsupported bank type\n"));
return ERROR_INVALID_PARAMETER;
break;
}
}
//
// Size of banking info.
//
BankSelect->Size = sizeof(VIDEO_BANK_SELECT) + codeSize;
if (BankSelect->BankingFlags & PLANAR_HC) {
BankSelect->Size += codePlanarSize +
(((ULONG)&EnablePlanarHCEnd) - ((ULONG)&EnablePlanarHCStart)) +
(((ULONG)&DisablePlanarHCEnd) - ((ULONG)&DisablePlanarHCStart));
}
//
// This serves an a ID for the version of the structure we're using.
//
BankSelect->Length = sizeof(VIDEO_BANK_SELECT);
//
// If the buffer isn't big enough to hold all info, just return
// ERROR_MORE_DATA; Size is already set.
//
if (BankSelectSize < BankSelect->Size ) {
//
// We're returning only the VIDEO_BANK_SELECT structure.
//
*OutputSize = sizeof(VIDEO_BANK_SELECT);
return ERROR_MORE_DATA;
}
//
// There's room enough for everything, so fill in all fields in
// VIDEO_BANK_SELECT. (All fields are always returned; the caller can
// just choose to ignore them, based on BankingFlags and BankingType.)
//
BankSelect->BitmapWidthInBytes = pMode->wbytes;
BankSelect->BitmapSize = pMode->sbytes;
//
// Copy all banking code into the output buffer.
//
pCodeDest = (PUCHAR)BankSelect + sizeof(VIDEO_BANK_SELECT);
if (pCodeBank != NULL) {
BankSelect->CodeOffset = pCodeDest - (PUCHAR)BankSelect;
VideoPortMoveMemory(pCodeDest, pCodeBank, codeSize);
pCodeDest += codeSize;
}
if (BankSelect->BankingFlags & PLANAR_HC) {
//
// Copy appropriate high-color planar Bank Switch code:
//
BankSelect->PlanarHCBankCodeOffset = pCodeDest - (PUCHAR)BankSelect;
VideoPortMoveMemory(pCodeDest, pCodePlanarBank, codePlanarSize);
pCodeDest += codePlanarSize;
//
// Copy high-color planar bank mode Enable code:
//
BankSelect->PlanarHCEnableCodeOffset = pCodeDest - (PUCHAR)BankSelect;
VideoPortMoveMemory(pCodeDest,
&EnablePlanarHCStart,
((ULONG)&EnablePlanarHCEnd) -
((ULONG)&EnablePlanarHCStart));
pCodeDest += ((ULONG)&EnablePlanarHCEnd) -
((ULONG)&EnablePlanarHCStart);
//
// Copy high-color planar bank mode Disable code:
//
BankSelect->PlanarHCDisableCodeOffset = pCodeDest - (PUCHAR)BankSelect;
VideoPortMoveMemory(pCodeDest,
&DisablePlanarHCStart,
((ULONG)&DisablePlanarHCEnd) -
((ULONG)&DisablePlanarHCStart));
}
//
// Number of bytes we're returning is the full banking info size.
//
*OutputSize = BankSelect->Size;
return NO_ERROR;
} // end VgaGetBankSelectCode()
VP_STATUS
VgaValidatorUcharEntry(
ULONG Context,
ULONG Port,
UCHAR AccessMode,
PUCHAR Data
)
/*++
Routine Description:
Entry point into the validator for byte I/O operations.
The entry point will be called whenever a byte operation was performed
by a DOS application on one of the specified Video ports. The kernel
emulator will forward these requests.
Arguments:
Context - Context value that is passed to each call made to the validator
function. This is the value the miniport driver specified in the
MiniportConfigInfo->EmulatorAccessEntriesContext.
Port - Port on which the operation is to be performed.
AccessMode - Determines if it is a read or write operation.
Data - Pointer to a variable containing the data to be written or a
variable into which the read data should be stored.
Return Value:
NO_ERROR.
--*/
{
PHW_DEVICE_EXTENSION hwDeviceExtension = (PHW_DEVICE_EXTENSION) Context;
ULONG endEmulation;
UCHAR temp;
Port -= VGA_BASE_IO_PORT;
if (hwDeviceExtension->TrappedValidatorCount) {
//
// If we are processing a WRITE instruction, then store it in the
// playback buffer. If the buffer is full, then play it back right
// away, end sync reset and reinitialize the buffer with a sync
// reset instruction.
//
// If we have a READ, we must flush the buffer (which has the side
// effect of starting SyncReset), perform the read operation, stop
// sync reset, and put back a sync reset instruction in the buffer
// so we can go on appropriately
//
if (AccessMode & EMULATOR_WRITE_ACCESS) {
//
// Make sure Bit 3 of the Miscellaneous register is always 0.
// If it is 1 it could select a non-existent clock, and kill the
// system
//
if (Port == MISC_OUTPUT_REG_WRITE_PORT) {
*Data &= 0xF7;
}
hwDeviceExtension->TrappedValidatorData[hwDeviceExtension->
TrappedValidatorCount].Port = Port;
hwDeviceExtension->TrappedValidatorData[hwDeviceExtension->
TrappedValidatorCount].AccessType = VGA_VALIDATOR_UCHAR_ACCESS;
hwDeviceExtension->TrappedValidatorData[hwDeviceExtension->
TrappedValidatorCount].Data = *Data;
hwDeviceExtension->TrappedValidatorCount++;
//
// Check to see if this instruction was ending sync reset.
// If it did, we must flush the buffer and reset the trapped
// IO ports to the minimal set.
//
if ( (Port == SEQ_DATA_PORT) &&
((*Data & END_SYNC_RESET_VALUE) == END_SYNC_RESET_VALUE) &&
(hwDeviceExtension->SequencerAddressValue == IND_SYNC_RESET)) {
endEmulation = 1;
} else {
//
// If we are accessing the seq address port, keep track of the
// data value
//
if (Port == SEQ_ADDRESS_PORT) {
hwDeviceExtension->SequencerAddressValue = *Data;
}
//
// If the buffer is not full, then just return right away.
//
if (hwDeviceExtension->TrappedValidatorCount <
VGA_MAX_VALIDATOR_DATA - 1) {
return NO_ERROR;
}
endEmulation = 0;
}
}
//
// We are either in a READ path or a WRITE path that caused a
// a full buffer. So flush the buffer either way.
//
// To do this put an END_SYNC_RESET at the end since we want to make
// the buffer is ended sync reset ended.
//
hwDeviceExtension->TrappedValidatorData[hwDeviceExtension->
TrappedValidatorCount].Port = SEQ_ADDRESS_PORT;
hwDeviceExtension->TrappedValidatorData[hwDeviceExtension->
TrappedValidatorCount].AccessType = VGA_VALIDATOR_USHORT_ACCESS;
hwDeviceExtension->TrappedValidatorData[hwDeviceExtension->
TrappedValidatorCount].Data = (USHORT) (IND_SYNC_RESET +
(END_SYNC_RESET_VALUE << 8));
hwDeviceExtension->TrappedValidatorCount++;
VideoPortSynchronizeExecution(hwDeviceExtension,
VpHighPriority,
(PMINIPORT_SYNCHRONIZE_ROUTINE)
VgaPlaybackValidatorData,
hwDeviceExtension);
//
// Write back the real value of the sequencer address port.
//
VideoPortWritePortUchar(hwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT,
(UCHAR) hwDeviceExtension->SequencerAddressValue);
//
// If we are in a READ path, read the data
//
if (AccessMode & EMULATOR_READ_ACCESS) {
*Data = VideoPortReadPortUchar(hwDeviceExtension->IOAddress + Port);
endEmulation = 0;
}
//
// If we are ending emulation, reset trapping to the minimal amount
// and exit.
//
if (endEmulation) {
VideoPortSetTrappedEmulatorPorts(hwDeviceExtension,
NUM_MINIMAL_VGA_VALIDATOR_ACCESS_RANGE,
MinimalVgaValidatorAccessRange);
return NO_ERROR;
}
//
// For both cases, put back a START_SYNC_RESET in the buffer.
//
hwDeviceExtension->TrappedValidatorCount = 1;
hwDeviceExtension->TrappedValidatorData[0].Port = SEQ_ADDRESS_PORT;
hwDeviceExtension->TrappedValidatorData[0].AccessType =
VGA_VALIDATOR_USHORT_ACCESS;
hwDeviceExtension->TrappedValidatorData[0].Data =
(ULONG) (IND_SYNC_RESET + (START_SYNC_RESET_VALUE << 8));
} else {
//
// Nothing trapped.
// Lets check is the IO is trying to do something that would require
// us to stop trapping
//
if (AccessMode & EMULATOR_WRITE_ACCESS) {
//
// Make sure Bit 3 of the Miscelaneous register is always 0.
// If it is 1 it could select a non-existant clock, and kill the
// system
//
if (Port == MISC_OUTPUT_REG_WRITE_PORT) {
temp = VideoPortReadPortUchar(hwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT);
VideoPortWritePortUshort((PUSHORT) (hwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT),
(USHORT) (IND_SYNC_RESET +
(START_SYNC_RESET_VALUE << 8)));
VideoPortWritePortUchar(hwDeviceExtension->IOAddress + Port,
(UCHAR) (*Data & 0xF7) );
VideoPortWritePortUshort((PUSHORT) (hwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT),
(USHORT) (IND_SYNC_RESET +
(END_SYNC_RESET_VALUE << 8)));
VideoPortWritePortUchar(hwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT,
temp);
return NO_ERROR;
}
//
// If we get an access to the sequencer register, start trapping.
//
if ( (Port == SEQ_DATA_PORT) &&
((*Data & END_SYNC_RESET_VALUE) != END_SYNC_RESET_VALUE) &&
(VideoPortReadPortUchar(hwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT) == IND_SYNC_RESET)) {
VideoPortSetTrappedEmulatorPorts(hwDeviceExtension,
NUM_FULL_VGA_VALIDATOR_ACCESS_RANGE,
FullVgaValidatorAccessRange);
hwDeviceExtension->TrappedValidatorCount = 1;
hwDeviceExtension->TrappedValidatorData[0].Port = Port;
hwDeviceExtension->TrappedValidatorData[0].AccessType =
VGA_VALIDATOR_UCHAR_ACCESS;
hwDeviceExtension->TrappedValidatorData[0].Data = *Data;
//
// Start keeping track of the state of the sequencer port.
//
hwDeviceExtension->SequencerAddressValue = IND_SYNC_RESET;
} else {
VideoPortWritePortUchar(hwDeviceExtension->IOAddress + Port,
*Data);
}
} else {
*Data = VideoPortReadPortUchar(hwDeviceExtension->IOAddress + Port);
}
}
return NO_ERROR;
} // end VgaValidatorUcharEntry()
VP_STATUS
VgaValidatorUshortEntry(
ULONG Context,
ULONG Port,
UCHAR AccessMode,
PUSHORT Data
)
/*++
Routine Description:
Entry point into the validator for word I/O operations.
The entry point will be called whenever a byte operation was performed
by a DOS application on one of the specified Video ports. The kernel
emulator will forward these requests.
Arguments:
Context - Context value that is passed to each call made to the validator
function. This is the value the miniport driver specified in the
MiniportConfigInfo->EmulatorAccessEntriesContext.
Port - Port on which the operation is to be performed.
AccessMode - Determines if it is a read or write operation.
Data - Pointer to a variable containing the data to be written or a
variable into which the read data should be stored.
Return Value:
NO_ERROR.
--*/
{
PHW_DEVICE_EXTENSION hwDeviceExtension = (PHW_DEVICE_EXTENSION) Context;
ULONG endEmulation;
UCHAR temp;
Port -= VGA_BASE_IO_PORT;
if (hwDeviceExtension->TrappedValidatorCount) {
//
// If we are processing a WRITE instruction, then store it in the
// playback buffer. If the buffer is full, then play it back right
// away, end sync reset and reinitialize the buffer with a sync
// reset instruction.
//
// If we have a READ, we must flush the buffer (which has the side
// effect of starting SyncReset), perform the read operation, stop
// sync reset, and put back a sync reset instruction in the buffer
// so we can go on appropriately
//
if (AccessMode & EMULATOR_WRITE_ACCESS) {
//
// Make sure Bit 3 of the Miscellaneous register is always 0.
// If it is 1 it could select a non-existent clock, and kill the
// system
//
if (Port == MISC_OUTPUT_REG_WRITE_PORT) {
*Data &= 0xFFF7;
}
hwDeviceExtension->TrappedValidatorData[hwDeviceExtension->
TrappedValidatorCount].Port = Port;
hwDeviceExtension->TrappedValidatorData[hwDeviceExtension->
TrappedValidatorCount].AccessType = VGA_VALIDATOR_USHORT_ACCESS;
hwDeviceExtension->TrappedValidatorData[hwDeviceExtension->
TrappedValidatorCount].Data = *Data;
hwDeviceExtension->TrappedValidatorCount++;
//
// Check to see if this instruction was ending sync reset.
// If it did, we must flush the buffer and reset the trapped
// IO ports to the minimal set.
//
if (Port == SEQ_ADDRESS_PORT) {
//
// If we are accessing the seq address port, keep track of its
// value
//
hwDeviceExtension->SequencerAddressValue = (*Data & 0xFF);
}
if ((Port == SEQ_ADDRESS_PORT) &&
( ((*Data >> 8) & END_SYNC_RESET_VALUE) ==
END_SYNC_RESET_VALUE) &&
(hwDeviceExtension->SequencerAddressValue == IND_SYNC_RESET)) {
endEmulation = 1;
} else {
//
// If the buffer is not full, then just return right away.
//
if (hwDeviceExtension->TrappedValidatorCount <
VGA_MAX_VALIDATOR_DATA - 1) {
return NO_ERROR;
}
endEmulation = 0;
}
}
//
// We are either in a READ path or a WRITE path that caused a
// a full buffer. So flush the buffer either way.
//
// To do this put an END_SYNC_RESET at the end since we want to make
// the buffer is ended sync reset ended.
//
hwDeviceExtension->TrappedValidatorData[hwDeviceExtension->
TrappedValidatorCount].Port = SEQ_ADDRESS_PORT;
hwDeviceExtension->TrappedValidatorData[hwDeviceExtension->
TrappedValidatorCount].AccessType = VGA_VALIDATOR_USHORT_ACCESS;
hwDeviceExtension->TrappedValidatorData[hwDeviceExtension->
TrappedValidatorCount].Data = (USHORT) (IND_SYNC_RESET +
(END_SYNC_RESET_VALUE << 8));
hwDeviceExtension->TrappedValidatorCount++;
VideoPortSynchronizeExecution(hwDeviceExtension,
VpHighPriority,
(PMINIPORT_SYNCHRONIZE_ROUTINE)
VgaPlaybackValidatorData,
hwDeviceExtension);
//
// Write back the real value of the sequencer address port.
//
VideoPortWritePortUchar((PUCHAR) (hwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT),
(UCHAR) hwDeviceExtension->SequencerAddressValue);
//
// If we are in a READ path, read the data
//
if (AccessMode & EMULATOR_READ_ACCESS) {
*Data = VideoPortReadPortUshort((PUSHORT)(hwDeviceExtension->IOAddress
+ Port));
endEmulation = 0;
}
//
// If we are ending emulation, reset trapping to the minimal amount
// and exit.
//
if (endEmulation) {
VideoPortSetTrappedEmulatorPorts(hwDeviceExtension,
NUM_MINIMAL_VGA_VALIDATOR_ACCESS_RANGE,
MinimalVgaValidatorAccessRange);
return NO_ERROR;
}
//
// For both cases, put back a START_SYNC_RESET in the buffer.
//
hwDeviceExtension->TrappedValidatorCount = 1;
hwDeviceExtension->TrappedValidatorData[0].Port = SEQ_ADDRESS_PORT;
hwDeviceExtension->TrappedValidatorData[0].AccessType =
VGA_VALIDATOR_USHORT_ACCESS;
hwDeviceExtension->TrappedValidatorData[0].Data =
(ULONG) (IND_SYNC_RESET + (START_SYNC_RESET_VALUE << 8));
} else {
//
// Nothing trapped.
// Lets check is the IO is trying to do something that would require
// us to stop trapping
//
if (AccessMode & EMULATOR_WRITE_ACCESS) {
//
// Make sure Bit 3 of the Miscelaneous register is always 0.
// If it is 1 it could select a non-existant clock, and kill the
// system
//
if (Port == MISC_OUTPUT_REG_WRITE_PORT) {
temp = VideoPortReadPortUchar(hwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT);
VideoPortWritePortUshort((PUSHORT) (hwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT),
(USHORT) (IND_SYNC_RESET +
(START_SYNC_RESET_VALUE << 8)));
VideoPortWritePortUshort((PUSHORT) (hwDeviceExtension->IOAddress +
(ULONG)Port),
(USHORT) (*Data & 0xFFF7) );
VideoPortWritePortUshort((PUSHORT) (hwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT),
(USHORT) (IND_SYNC_RESET +
(END_SYNC_RESET_VALUE << 8)));
VideoPortWritePortUchar(hwDeviceExtension->IOAddress + SEQ_ADDRESS_PORT,
temp);
return NO_ERROR;
}
if ( (Port == SEQ_ADDRESS_PORT) &&
(((*Data>> 8) & END_SYNC_RESET_VALUE) != END_SYNC_RESET_VALUE) &&
((*Data & 0xFF) == IND_SYNC_RESET)) {
VideoPortSetTrappedEmulatorPorts(hwDeviceExtension,
NUM_FULL_VGA_VALIDATOR_ACCESS_RANGE,
FullVgaValidatorAccessRange);
hwDeviceExtension->TrappedValidatorCount = 1;
hwDeviceExtension->TrappedValidatorData[0].Port = Port;
hwDeviceExtension->TrappedValidatorData[0].AccessType =
VGA_VALIDATOR_USHORT_ACCESS;
hwDeviceExtension->TrappedValidatorData[0].Data = *Data;
//
// Start keeping track of the state of the sequencer port.
//
hwDeviceExtension->SequencerAddressValue = IND_SYNC_RESET;
} else {
VideoPortWritePortUshort((PUSHORT)(hwDeviceExtension->IOAddress +
Port),
*Data);
}
} else {
*Data = VideoPortReadPortUshort((PUSHORT)(hwDeviceExtension->IOAddress +
Port));
}
}
return NO_ERROR;
} // end VgaValidatorUshortEntry()
VP_STATUS
VgaValidatorUlongEntry(
ULONG Context,
ULONG Port,
UCHAR AccessMode,
PULONG Data
)
/*++
Routine Description:
Entry point into the validator for dword I/O operations.
The entry point will be called whenever a byte operation was performed
by a DOS application on one of the specified Video ports. The kernel
emulator will forward these requests.
Arguments:
Context - Context value that is passed to each call made to the validator
function. This is the value the miniport driver specified in the
MiniportConfigInfo->EmulatorAccessEntriesContext.
Port - Port on which the operation is to be performed.
AccessMode - Determines if it is a read or write operation.
Data - Pointer to a variable containing the data to be written or a
variable into which the read data should be stored.
Return Value:
NO_ERROR.
--*/
{
PHW_DEVICE_EXTENSION hwDeviceExtension = (PHW_DEVICE_EXTENSION) Context;
ULONG endEmulation;
UCHAR temp;
Port -= VGA_BASE_IO_PORT;
if (hwDeviceExtension->TrappedValidatorCount) {
//
// If we are processing a WRITE instruction, then store it in the
// playback buffer. If the buffer is full, then play it back right
// away, end sync reset and reinitialize the buffer with a sync
// reset instruction.
//
// If we have a READ, we must flush the buffer (which has the side
// effect of starting SyncReset), perform the read operation, stop
// sync reset, and put back a sync reset instruction in the buffer
// so we can go on appropriately
//
if (AccessMode & EMULATOR_WRITE_ACCESS) {
//
// Make sure Bit 3 of the Miscellaneous register is always 0.
// If it is 1 it could select a non-existent clock, and kill the
// system
//
if (Port == MISC_OUTPUT_REG_WRITE_PORT) {
*Data &= 0xFFFFFFF7;
}
hwDeviceExtension->TrappedValidatorData[hwDeviceExtension->
TrappedValidatorCount].Port = Port;
hwDeviceExtension->TrappedValidatorData[hwDeviceExtension->
TrappedValidatorCount].AccessType = VGA_VALIDATOR_ULONG_ACCESS;
hwDeviceExtension->TrappedValidatorData[hwDeviceExtension->
TrappedValidatorCount].Data = *Data;
hwDeviceExtension->TrappedValidatorCount++;
//
// Check to see if this instruction was ending sync reset.
// If it did, we must flush the buffer and reset the trapped
// IO ports to the minimal set.
//
if (Port == SEQ_ADDRESS_PORT) {
//
// If we are accessing the seq address port, keep track of its
// value
//
hwDeviceExtension->SequencerAddressValue = (*Data & 0xFF);
}
if ((Port == SEQ_ADDRESS_PORT) &&
( ((*Data >> 8) & END_SYNC_RESET_VALUE) ==
END_SYNC_RESET_VALUE) &&
(hwDeviceExtension->SequencerAddressValue == IND_SYNC_RESET)) {
endEmulation = 1;
} else {
//
// If the buffer is not full, then just return right away.
//
if (hwDeviceExtension->TrappedValidatorCount <
VGA_MAX_VALIDATOR_DATA - 1) {
return NO_ERROR;
}
endEmulation = 0;
}
}
//
// We are either in a READ path or a WRITE path that caused a
// a full buffer. So flush the buffer either way.
//
// To do this put an END_SYNC_RESET at the end since we want to make
// the buffer is ended sync reset ended.
//
hwDeviceExtension->TrappedValidatorData[hwDeviceExtension->
TrappedValidatorCount].Port = SEQ_ADDRESS_PORT;
hwDeviceExtension->TrappedValidatorData[hwDeviceExtension->
TrappedValidatorCount].AccessType = VGA_VALIDATOR_USHORT_ACCESS;
hwDeviceExtension->TrappedValidatorData[hwDeviceExtension->
TrappedValidatorCount].Data = (USHORT) (IND_SYNC_RESET +
(END_SYNC_RESET_VALUE << 8));
hwDeviceExtension->TrappedValidatorCount++;
VideoPortSynchronizeExecution(hwDeviceExtension,
VpHighPriority,
(PMINIPORT_SYNCHRONIZE_ROUTINE)
VgaPlaybackValidatorData,
hwDeviceExtension);
//
// Write back the real value of the sequencer address port.
//
VideoPortWritePortUchar(hwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT,
(UCHAR) hwDeviceExtension->SequencerAddressValue);
//
// If we are in a READ path, read the data
//
if (AccessMode & EMULATOR_READ_ACCESS) {
*Data = VideoPortReadPortUlong((PULONG) (hwDeviceExtension->IOAddress +
Port));
endEmulation = 0;
}
//
// If we are ending emulation, reset trapping to the minimal amount
// and exit.
//
if (endEmulation) {
VideoPortSetTrappedEmulatorPorts(hwDeviceExtension,
NUM_MINIMAL_VGA_VALIDATOR_ACCESS_RANGE,
MinimalVgaValidatorAccessRange);
return NO_ERROR;
}
//
// For both cases, put back a START_SYNC_RESET in the buffer.
//
hwDeviceExtension->TrappedValidatorCount = 1;
hwDeviceExtension->TrappedValidatorData[0].Port = SEQ_ADDRESS_PORT;
hwDeviceExtension->TrappedValidatorData[0].AccessType =
VGA_VALIDATOR_USHORT_ACCESS;
hwDeviceExtension->TrappedValidatorData[0].Data =
(ULONG) (IND_SYNC_RESET + (START_SYNC_RESET_VALUE << 8));
} else {
//
// Nothing trapped.
// Lets check is the IO is trying to do something that would require
// us to stop trapping
//
if (AccessMode & EMULATOR_WRITE_ACCESS) {
//
// Make sure Bit 3 of the Miscelaneous register is always 0.
// If it is 1 it could select a non-existant clock, and kill the
// system
//
if (Port == MISC_OUTPUT_REG_WRITE_PORT) {
temp = VideoPortReadPortUchar(hwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT);
VideoPortWritePortUshort((PUSHORT) (hwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT),
(USHORT) (IND_SYNC_RESET +
(START_SYNC_RESET_VALUE << 8)));
VideoPortWritePortUlong((PULONG) (hwDeviceExtension->IOAddress +
Port),
(ULONG) (*Data & 0xFFFFFFF7) );
VideoPortWritePortUshort((PUSHORT) (hwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT),
(USHORT) (IND_SYNC_RESET +
(END_SYNC_RESET_VALUE << 8)));
VideoPortWritePortUchar(hwDeviceExtension->IOAddress + SEQ_ADDRESS_PORT,
temp);
return NO_ERROR;
}
if ( (Port == SEQ_ADDRESS_PORT) &&
(((*Data>> 8) & END_SYNC_RESET_VALUE) != END_SYNC_RESET_VALUE) &&
((*Data & 0xFF) == IND_SYNC_RESET)) {
VideoPortSetTrappedEmulatorPorts(hwDeviceExtension,
NUM_FULL_VGA_VALIDATOR_ACCESS_RANGE,
FullVgaValidatorAccessRange);
hwDeviceExtension->TrappedValidatorCount = 1;
hwDeviceExtension->TrappedValidatorData[0].Port = Port;
hwDeviceExtension->TrappedValidatorData[0].AccessType =
VGA_VALIDATOR_ULONG_ACCESS;
hwDeviceExtension->TrappedValidatorData[0].Data = *Data;
//
// Start keeping track of the state of the sequencer port.
//
hwDeviceExtension->SequencerAddressValue = IND_SYNC_RESET;
} else {
VideoPortWritePortUlong((PULONG) (hwDeviceExtension->IOAddress +
Port),
*Data);
}
} else {
*Data = VideoPortReadPortUlong((PULONG) (hwDeviceExtension->IOAddress +
Port));
}
}
return NO_ERROR;
} // end VgaValidatorUlongEntry()
BOOLEAN
VgaPlaybackValidatorData(
PVOID Context
)
/*++
Routine Description:
Performs all the DOS apps IO port accesses that were trapped by the
validator. Only IO accesses that can be processed are WRITEs
The number of outstanding IO access in deviceExtension is set to
zero as a side effect.
This function must be called via a call to VideoPortSynchronizeRoutine.
Arguments:
Context - Context parameter passed to the synchronized routine.
Must be a pointer to the miniport driver's device extension.
Return Value:
TRUE.
--*/
{
PHW_DEVICE_EXTENSION hwDeviceExtension = Context;
ULONG ioBaseAddress = (ULONG) hwDeviceExtension->IOAddress;
ULONG i;
PVGA_VALIDATOR_DATA validatorData = hwDeviceExtension->TrappedValidatorData;
for (i = 0; i < hwDeviceExtension->TrappedValidatorCount;
i++, validatorData++) {
//
// Calculate base address first
//
ioBaseAddress = (ULONG)hwDeviceExtension->IOAddress +
validatorData->Port;
//
// This is a write operation. We will automatically stop when the
// buffer is empty.
//
switch (validatorData->AccessType) {
case VGA_VALIDATOR_UCHAR_ACCESS :
//
// Compensate for hardware bug in the VRAM 1 with certain oddball
// tests.
//
if (validatorData->Port == CRTC_DATA_PORT_COLOR) {
ULONG temp;
if (VideoPortReadPortUchar((PUCHAR) hwDeviceExtension->IOAddress +
CRTC_ADDRESS_PORT_COLOR) == 0x00) {
VideoPortWritePortUchar((PUCHAR)
hwDeviceExtension->IOAddress +
CRTC_ADDRESS_PORT_COLOR, 1);
temp = VideoPortReadPortUchar((PUCHAR)
hwDeviceExtension->IOAddress +
CRTC_DATA_PORT_COLOR);
VideoPortWritePortUchar((PUCHAR)
hwDeviceExtension->IOAddress +
CRTC_ADDRESS_PORT_COLOR, 0);
if (validatorData->Data < (temp - 2)) {
validatorData->Data = temp - 2;
}
}
}
if (validatorData->Port == CRTC_DATA_PORT_MONO) {
ULONG temp;
if (VideoPortReadPortUchar((PUCHAR) hwDeviceExtension->IOAddress +
CRTC_ADDRESS_PORT_MONO) == 0x00) {
VideoPortWritePortUchar((PUCHAR)
hwDeviceExtension->IOAddress +
CRTC_ADDRESS_PORT_MONO, 1);
temp = VideoPortReadPortUchar((PUCHAR)
hwDeviceExtension->IOAddress +
CRTC_DATA_PORT_MONO);
VideoPortWritePortUchar((PUCHAR)
hwDeviceExtension->IOAddress +
CRTC_ADDRESS_PORT_MONO, 0);
if (validatorData->Data < (temp - 2)) {
validatorData->Data = temp - 2;
}
}
}
VideoPortWritePortUchar((PUCHAR)ioBaseAddress,
(UCHAR) validatorData->Data);
break;
case VGA_VALIDATOR_USHORT_ACCESS :
VideoPortWritePortUshort((PUSHORT)ioBaseAddress,
(USHORT) validatorData->Data);
break;
case VGA_VALIDATOR_ULONG_ACCESS :
VideoPortWritePortUlong((PULONG)ioBaseAddress,
(ULONG) validatorData->Data);
break;
default:
VideoDebugPrint((0, "InvalidValidatorAccessType\n" ));
}
}
hwDeviceExtension->TrappedValidatorCount = 0;
return TRUE;
} // end VgaPlaybackValidatorData()
VP_STATUS
VgaQueryPointerCapabilities(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_POINTER_CAPABILITIES PointerCaps,
ULONG PointerCapsSize,
PULONG OutputSize
)
/*++
Routine Description:
Returns information about miniport pointer support in the specified mode.
Arguments:
HwDeviceExtension - Pointer to the miniport driver's device extension.
PointerCaps - Pointer to a VIDEO_POINTER_CAPABILITIES structure.
PointerCapsSize - Size of output buffer supplied by the user.
OutputSize - Pointer to a variable in which to return the actual size of
the data returned in the output buffer.
Return Value:
NO_ERROR - information returned successfully
ERROR_INSUFFICIENT_BUFFER - output buffer not large enough to return
any useful data
--*/
{
UNREFERENCED_PARAMETER(HwDeviceExtension);
//
// The minimum passed buffer size is a VIDEO_BANK_SELECT
// structure, so that we can return the required size; we can't do
// anything if we don't have at least that much buffer.
//
if (PointerCapsSize < sizeof(VIDEO_POINTER_CAPABILITIES)) {
*OutputSize = 0; // nothing to return
return ERROR_INSUFFICIENT_BUFFER;
}
//
// Normally, this would be mode based, but the hardware pointer works in
// all modes, even text.
// WARNING when we support 256-color modes, the pointer load address will
// change; also, this should change depending on how much memory is present
//
PointerCaps->Flags = VIDEO_MODE_MONO_POINTER; // mono cursor only
PointerCaps->MaxWidth = PTR_WIDTH_IN_PIXELS;
PointerCaps->MaxHeight = PTR_HEIGHT;
PointerCaps->HWPtrBitmapStart =
0xC000+(HW_POINTER_LOAD_LEN*DEFAULT_PPA_NUM);
PointerCaps->HWPtrBitmapEnd =
PointerCaps->HWPtrBitmapStart + HW_POINTER_LOAD_LEN - 1;
//
// Number of bytes we're returning.
//
*OutputSize = sizeof(VIDEO_POINTER_CAPABILITIES);
return NO_ERROR;
} // end VgaQueryPointerCapsCode()
VP_STATUS
VgaSetPointerPosition(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_POINTER_POSITION pPointerPosition,
ULONG PointerPositionSize,
PULONG OutputSize
)
/*++
Routine Description:
Sets the location of the hardware pointer. Does not enable it if it's not
already enabled.
Arguments:
HwDeviceExtension - Pointer to the miniport driver's device extension.
pPointerPosition - Pointer to PVIDEO_POINTER_POSITION structure describing
new pointer position.
PointerPositionSize - Length of the input buffer supplied by the user.
OutputSize - Pointer to a variable in which to return the actual size of
the data returned in the output buffer.
Return Value:
NO_ERROR - information returned successfully
ERROR_INSUFFICIENT_BUFFER - input buffer not large enough to return
any useful data
--*/
{
//
// We don't return anything.
//
*OutputSize = 0;
//
// Make sure enough data was passed in.
//
if (PointerPositionSize < sizeof(VIDEO_POINTER_POSITION)) {
return ERROR_INSUFFICIENT_BUFFER;
}
//
// Update the pointer position variables.
//
HwDeviceExtension->videoPointerAttributes.Row = pPointerPosition->Row;
HwDeviceExtension->videoPointerAttributes.Column = pPointerPosition->Column;
//
// Move the pointer.
// LATER: shouldn't be hardwired for bank.
//
V7DrawPointer((ULONG)pPointerPosition->Column,
(ULONG)pPointerPosition->Row,
(PUCHAR)HwDeviceExtension->VideoMemoryAddress +
(0xC000+(HW_POINTER_LOAD_LEN*DEFAULT_PPA_NUM)),
POINTER_BANK,
HwDeviceExtension->jCurAndMask,
&HwDeviceExtension->hwPtrShiftInfo);
V7EnablePointer(HwDeviceExtension); // make sure the pointer is on
// LATER: should this be part of this function?
return NO_ERROR;
} // end VgaSetPointerPosition()
VP_STATUS
VgaQueryPointerPosition(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_POINTER_POSITION pPointerPosition,
ULONG PointerPositionSize,
PULONG OutputSize
)
/*++
Routine Description:
Gets the location of the hardware pointer.
Arguments:
HwDeviceExtension - Pointer to the miniport driver's device extension.
pPointerPosition - Pointer to PVIDEO_POINTER_POSITION structure in which
current pointer position is to be returned.
PointerPositionSize - Length of the output buffer supplied by the user.
OutputSize - Pointer to a variable in which to return the actual size of
the data returned in the output buffer.
Return Value:
NO_ERROR - information returned successfully
ERROR_INSUFFICIENT_BUFFER - output buffer not large enough to return
any useful data
--*/
{
//
// Make sure the output buffer is big enough.
//
if (PointerPositionSize < sizeof(VIDEO_POINTER_POSITION)) {
*OutputSize = 0;
return ERROR_INSUFFICIENT_BUFFER;
}
//
// Return the pointer position
//
pPointerPosition->Row =
(SHORT)HwDeviceExtension->videoPointerAttributes.Row;
pPointerPosition->Column =
(SHORT)HwDeviceExtension->videoPointerAttributes.Column;
*OutputSize = sizeof(VIDEO_POINTER_POSITION);
return NO_ERROR;
} // end VgaQueryPointerPosition()
VP_STATUS
VgaSetPointerAttributes(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_POINTER_ATTRIBUTES pVideoPointerAttributes,
ULONG PointerAttributesSize,
PULONG OutputSize
)
/*++
Routine Description:
Sets the desired pointer attributes. If the pointer is not accepted,
for any reason, an error is returned and the pointer is disabled.
Arguments:
HwDeviceExtension - Pointer to the miniport driver's device extension.
pVideoPointerAttributes - Pointer to PVIDEO_POINTER_ATTRIBUTES structure
containing the desired pointer attributes.
PointerAttributesSize - Length of the input buffer supplied by the user.
OutputSize - Pointer to a variable in which to return the actual size of
the data returned in the output buffer.
Return Value:
NO_ERROR - information returned successfully
ERROR_INSUFFICIENT_BUFFER - output buffer not large enough to return
any useful data
--*/
{
//
// We don't return anything.
//
*OutputSize = 0;
//
// Make sure the input buffer is big enough to have the basic pointer
// attributes structure.
//
if (PointerAttributesSize < sizeof(VIDEO_POINTER_ATTRIBUTES)) {
V7DisablePointer(HwDeviceExtension);
HwDeviceExtension->videoPointerAttributes.Enable = FALSE;
return ERROR_INSUFFICIENT_BUFFER;
}
//
// See if we can accept these attributes. We only support a monochrome
// pointer up to a certain size.
//
if ( (pVideoPointerAttributes->Flags & VIDEO_MODE_COLOR_POINTER) ||
(!(pVideoPointerAttributes->Flags & VIDEO_MODE_MONO_POINTER)) ||
(pVideoPointerAttributes->Height > PTR_HEIGHT) ||
(pVideoPointerAttributes->Width > PTR_WIDTH_IN_PIXELS) ) {
V7DisablePointer(HwDeviceExtension);
HwDeviceExtension->videoPointerAttributes.Enable = FALSE;
return ERROR_INVALID_PARAMETER;
}
//
// Make sure the input buffer is big enough to have the basic pointer
// attributes structure plus the pointer bitmap.
//
if (PointerAttributesSize <
(sizeof(VIDEO_POINTER_ATTRIBUTES) +
(pVideoPointerAttributes->Height *
pVideoPointerAttributes->WidthInBytes * 2)) ) {
V7DisablePointer(HwDeviceExtension);
HwDeviceExtension->videoPointerAttributes.Enable = FALSE;
return ERROR_INSUFFICIENT_BUFFER;
}
//
// Disable the pointer while we change and move it.
//
if (!(pVideoPointerAttributes->Flags & VIDEO_MODE_ANIMATE_UPDATE))
V7DisablePointer(HwDeviceExtension);
//
// Copy the AND and XOR masks to the local buffer.
//
VideoPortMoveMemory(HwDeviceExtension->jCurAndMask,
pVideoPointerAttributes->Pixels,
PTR_HEIGHT * PTR_WIDTH * 2);
//
// Mark that there is no currently loaded cursor.
//
HwDeviceExtension->hwPtrShiftInfo.ulShiftedFlag = 0xFF;
//
// Restore default Sequencer Index.
//
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT, IND_MAP_MASK);
//
// Load the pointer and Set the position.
// LATER: shouldn't be hardwired for bank.
//
V7DrawPointer(pVideoPointerAttributes->Column,
pVideoPointerAttributes->Row,
(PUCHAR)HwDeviceExtension->VideoMemoryAddress +
(0xC000+(HW_POINTER_LOAD_LEN*DEFAULT_PPA_NUM)),
POINTER_BANK,
HwDeviceExtension->jCurAndMask,
&HwDeviceExtension->hwPtrShiftInfo);
//
// Enable if appropriate.
//
if (pVideoPointerAttributes->Enable != 0) {
V7EnablePointer(HwDeviceExtension);
}
//
// Copy over the pointer attributes.
//
HwDeviceExtension->videoPointerAttributes = *pVideoPointerAttributes;
return NO_ERROR;
} // end VgaQueryPointerAttributes()
VP_STATUS
VgaQueryPointerAttributes(
PHW_DEVICE_EXTENSION HwDeviceExtension,
PVIDEO_POINTER_ATTRIBUTES pVideoPointerAttributes,
ULONG PointerAttributesSize,
PULONG OutputSize
)
/*++
Routine Description:
Returns the current pointer attributes.
Arguments:
HwDeviceExtension - Pointer to the miniport driver's device extension.
pVideoPointerAttributes - Pointer to PVIDEO_POINTER_ATTRIBUTES structure in
which current pointer attributes are to be returned.
PointerAttributesSize - Length of the output buffer supplied by the user.
OutputSize - Pointer to a variable in which to return the actual size of
the data returned in the output buffer.
Return Value:
NO_ERROR - information returned successfully
ERROR_INSUFFICIENT_BUFFER - output buffer not large enough to return
any useful data
--*/
{
//
// Make sure the output buffer is big enough.
//
if (PointerAttributesSize < sizeof(VIDEO_POINTER_ATTRIBUTES)) {
*OutputSize = 0;
return ERROR_INSUFFICIENT_BUFFER;
}
//
// Return the pointer attributes.
//
*pVideoPointerAttributes = HwDeviceExtension->videoPointerAttributes;
*OutputSize = sizeof(VIDEO_POINTER_ATTRIBUTES);
return NO_ERROR;
} // end VgaQueryPointerAttributes()
VOID
V7EnablePointer(
PHW_DEVICE_EXTENSION HwDeviceExtension
)
/*++
Routine Description:
Enables the hardware pointer (makes it visible).
Arguments:
None.
Return Value:
None.
--*/
{
// Turn on the hardware graphics pointer.
VideoPortWritePortUchar(HwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT, IND_SEQ_HW_POINTER);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress + SEQ_DATA_PORT,
(UCHAR) ((ULONG) VideoPortReadPortUchar(
HwDeviceExtension->IOAddress + SEQ_DATA_PORT) |
(ULONG) HW_POINTER_ON));
// Restore default Map Mask setting.
VideoPortWritePortUshort((PUSHORT) (HwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT), IND_MAP_MASK + (MAP_MASK_DEFAULT << 8));
} // end V7EnablePointer()
VOID
V7DisablePointer(
PHW_DEVICE_EXTENSION HwDeviceExtension
)
/*++
Routine Description:
Disables the hardware pointer (makes it invisible).
Arguments:
None.
Return Value:
None.
--*/
{
// Turn off the hardware graphics pointer.
VideoPortWritePortUchar(HwDeviceExtension->IOAddress + SEQ_ADDRESS_PORT,
IND_SEQ_HW_POINTER);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress + SEQ_DATA_PORT,
(UCHAR) ((ULONG) VideoPortReadPortUchar(
HwDeviceExtension->IOAddress + SEQ_DATA_PORT) &
(ULONG) HW_POINTER_OFF));
// Restore default Map Mask setting.
VideoPortWritePortUshort((PUSHORT) (HwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT), IND_MAP_MASK + (MAP_MASK_DEFAULT << 8));
} // end V7DisablePointer()
BOOLEAN
V7IsPresent(
PHW_DEVICE_EXTENSION HwDeviceExtension
)
/*++
Routine Description:
This routine returns TRUE if a supported V7 adapter is present. It assumes
that it's already been established that a VGA is present. It tests for
a V7 VGA chip by checking that whatever value we put in CRTC0A shows up in
CRTC1F, XORed with 0xEA. If this works, then we look at the BIOS V7
ID word to figure out if it's a supported V7 VGA.
If this function fails to find a supported V7 adapter, it attempts to undo
any damage it may have inadvertently done while testing.
If a supported V7 adapter is found, the adapter is returned to its original
state after testing is finished, and the adapter type in the hardware
device extension is set to the appropriate adapter type.
Arguments:
None.
Return Value:
TRUE if a supported V7 adapter (currently VRAM 1, VRAM 2, or VRAM 2 Ergo)
is present, FALSE if not.
--*/
{
UCHAR originalCRTCIndex;
UCHAR originalIndV7IDWrite;
UCHAR temp1, temp2, temp3;
PUCHAR CRTCAddressPort, CRTCDataPort;
PUSHORT pusROMPtr;
//
// Determine where the CRTC registers are addressed (color or mono).
//
CRTCAddressPort = HwDeviceExtension->IOAddress;
CRTCDataPort = HwDeviceExtension->IOAddress;
if (VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
MISC_OUTPUT_REG_READ_PORT) & 0x01) {
CRTCAddressPort += CRTC_ADDRESS_PORT_COLOR;
CRTCDataPort += CRTC_DATA_PORT_COLOR;
} else {
CRTCAddressPort += CRTC_ADDRESS_PORT_MONO;
CRTCDataPort += CRTC_DATA_PORT_MONO;
}
//
// Save the original state of the CRTC Index.
//
originalCRTCIndex = VideoPortReadPortUchar(CRTCAddressPort);
//
// Modify IND_V7_ID_WRITE, then see whether IND_V7_ID_READ changes to the
// value written to IND_V7_ID_WRITE XORed with 0xEA.
//
//
// Set the CRTC Index to IND_V7_ID_WRITE.
//
VideoPortWritePortUchar(CRTCAddressPort, IND_V7_ID_WRITE);
//
// Save the original state of CRTC register IND_V7_ID_WRITE.
//
originalIndV7IDWrite = VideoPortReadPortUchar(CRTCDataPort);
//
// Write one possible IND_V7_ID_WRITE state and read it back from
// IND_V7_ID_READ (where it should be XORed with 0xEA).
//
VideoPortWritePortUshort((PUSHORT)CRTCAddressPort,
(USHORT)((0x55 << 8) + IND_V7_ID_WRITE));
VideoPortWritePortUchar(CRTCAddressPort, IND_V7_ID_READ);
temp1 = VideoPortReadPortUchar(CRTCDataPort);
//
// Write another possible IND_V7_ID_WRITE state and read it back.
//
VideoPortWritePortUshort((PUSHORT)CRTCAddressPort,
(USHORT)((0xAA << 8) + IND_V7_ID_WRITE));
VideoPortWritePortUchar(CRTCAddressPort, IND_V7_ID_READ);
temp2 = VideoPortReadPortUchar(CRTCDataPort);
//
// Write yet another possible IND_V7_ID_WRITE state and read it back.
//
VideoPortWritePortUshort((PUSHORT)CRTCAddressPort,
(USHORT)((0x3E << 8) + IND_V7_ID_WRITE));
VideoPortWritePortUchar(CRTCAddressPort, IND_V7_ID_READ);
temp3 = VideoPortReadPortUchar(CRTCDataPort);
//
// Restore the original IND_V7_ID_WRITE state.
//
VideoPortWritePortUshort((PUSHORT)CRTCAddressPort,
(USHORT)((originalIndV7IDWrite << 8) + IND_V7_ID_WRITE));
//
// Restore the original CRTC Index.
//
VideoPortWritePortUchar(CRTCAddressPort, originalCRTCIndex);
//
// See if CRTC1F changed properly.
//
if ((temp1 != (UCHAR) (0x55 ^ 0xEA)) ||
(temp2 != (UCHAR) (0xAA ^ 0xEA)) ||
(temp3 != (UCHAR) (0x3E ^ 0xEA))) {
//
// Didn't change properly; not a V7 VGA chip.
//
VideoDebugPrint((1, "V7 VGA chip not found\n"));
return FALSE;
}
//
// Determine if this is a V7 VRAM (I). We do the check
// for the older VRAM this way since it is possible that
// this card may have the old BIOS.
//
//
// Save Sequencer index, enable extensions, get chip revision,
// disable extensions, and restore index.
//
temp1 = VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT);
VideoPortWritePortUshort((PUSHORT)(HwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT),(USHORT)0xea06);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress + SEQ_ADDRESS_PORT,
IND_CHIP_REVISION);
temp2 = VideoPortReadPortUchar(HwDeviceExtension->IOAddress +
SEQ_DATA_PORT) & 0xF0;
VideoPortWritePortUshort((PUSHORT)(HwDeviceExtension->IOAddress +
SEQ_ADDRESS_PORT),(USHORT)0xae06);
VideoPortWritePortUchar(HwDeviceExtension->IOAddress + SEQ_ADDRESS_PORT,
temp1);
//
// Assume this is a VRAM1.
//
HwDeviceExtension->AdapterType = Vram1;
HwDeviceExtension->ChipWithRefreshProblems = 0; // VRAM1s always refresh OK
if (temp2 != 0x70) {
//
// It *is* a V7 VGA chip, but is not a VRAM1,
// Now see if it's a supported V7 adapter, by checking the V7 adapter
// ID word in the BIOS.
//
pusROMPtr = (PUSHORT) (((PUCHAR)HwDeviceExtension->ROMBaseAddress) +
V7_ID_WORD_ROM_OFFSET);
switch (*pusROMPtr) {
case VRAM2_ROM_ID_1:
case VRAM2_ROM_ID_2:
HwDeviceExtension->AdapterType = Vram2;
break;
case VRAM2ERGO_ROM_ID:
HwDeviceExtension->AdapterType = Vram2Ergo;
break;
default:
HwDeviceExtension->AdapterType = OtherV7;
VideoDebugPrint((1,
"ID #%x is not a V7 VRAM adapter \n", *pusROMPtr));
//
// We do not support the 1024 i because it has weird bugs in
// it.
// If we did want to support it, just brak instead of returning
// and try to solve the other bugs ...
//
// break;
return FALSE;
}
//
// See if this is a version of the VRAM2 chip that doesn't refresh
// offscreen memory (version 0x5X).
//
if (temp2 == 0x50) {
//
// It is a no-offscreen-refresh chip, so tell the display driver
// not to use offscreen memory.
//
HwDeviceExtension->ChipWithRefreshProblems = 1;
}
}
//
// It's a supported V7 adapter.
//
//
// ***************************
// ***** IMPORTANT NOTE ******
// ***************************
//
// We can not get the memory size and calculate valid modes here
// because we need to do an int10 for that.
// An int 10 is only possible when being called by the display driver,
// and must therefore be done in the Initialize routine
//
return TRUE;
} // V7IsPresent()
//---------------------------------------------------------------------------
//
// The memory manager needs a "C" interface to the banking function
//
/*++
Routine Description:
These functions are a "C" callable interface to the ASM banking
functions. They are NON paged because they are called from the
Memory Manager during some page faults.
Arguments:
iBankRead - Index of bank we want mapped in to read from.
iBankWrite - Index of bank we want mapped in to write to.
Return Value:
None.
--*/
VOID
vBankMap_1RW(
LONG iBankRead,
LONG iBankWrite,
PVOID pvContext
)
{
VideoDebugPrint((1, "vBankMap_1RW(%d,%d) - enter\n",iBankRead,iBankWrite));
//
// This adapter doesn't support separate read and write banks. We'll use
// the read bank requested since they should be the same.
//
#ifdef _X86_
_asm {
mov eax,iBankRead
lea ebx,BankSwitchStart256
call ebx
}
#endif
VideoDebugPrint((1, "vBankMap_1RW - exit\n"));
}
VOID
vBankMap_2RW(
LONG iBankRead,
LONG iBankWrite,
PVOID pvContext
)
{
VideoDebugPrint((1, "vBankMap_2RW(%d,%d) - enter\n",iBankRead,iBankWrite));
#ifdef _X86_
_asm {
mov eax,iBankRead
mov edx,eax
inc edx
lea ebx,BankSwitchStart256_2RW
call ebx
}
#endif
VideoDebugPrint((1, "vBankMap_2RW - exit\n"));
}