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/*++
Copyright (c) 1989 Microsoft Corporation
Module Name:
ixpcibrd.c
Abstract:
Get PCI-PCI bridge information
Author:
Ken Reneris (kenr) 14-June-1994
Environment:
Kernel mode
Revision History:
--*/
#include "halp.h"
#include "pci.h"
#include "pcip.h"
#include "stdio.h"
// debugging only...
// #define INIT_PCI_BRIDGE 1
extern WCHAR rgzMultiFunctionAdapter[];extern WCHAR rgzConfigurationData[];extern WCHAR rgzIdentifier[];extern WCHAR rgzReservedResources[];
#if DBG
#define DBGMSG(a) DbgPrint(a)
#else
#define DBGMSG(a)
#endif
#define IsPciBridge(a) \
((a)->VendorID != PCI_INVALID_VENDORID && \ PCI_CONFIG_TYPE(a) == PCI_BRIDGE_TYPE && \ (a)->BaseClass == PCI_CLASS_BRIDGE_DEV && \ (a)->SubClass == PCI_SUBCLASS_BR_PCI_TO_PCI)
#define IsCardbusBridge(a) \
((a)->VendorID != PCI_INVALID_VENDORID && \ PCI_CONFIG_TYPE(a) == PCI_CARDBUS_BRIDGE_TYPE && \ (a)->BaseClass == PCI_CLASS_BRIDGE_DEV && \ (a)->SubClass == PCI_SUBCLASS_BR_CARDBUS)
typedef struct { ULONG BusNo; PBUS_HANDLER BusHandler; PPCIPBUSDATA BusData; PCI_SLOT_NUMBER SlotNumber; PPCI_COMMON_CONFIG PciData; ULONG IO, Memory, PFMemory; UCHAR Buffer[PCI_COMMON_HDR_LENGTH];} CONFIGBRIDGE, *PCONFIGBRIDGE;
//
// Internal prototypes
//
#ifdef INIT_PCI_BRIDGE
VOIDHalpGetPciBridgeNeeds ( IN ULONG HwType, IN PUCHAR MaxPciBus, IN PCONFIGBRIDGE Current );#endif
VOIDHalpSetPciBridgedVgaCronk ( IN ULONG BusNumber, IN ULONG Base, IN ULONG Limit );
ULONGHalpGetBridgedPCIInterrupt ( IN PBUS_HANDLER BusHandler, IN PBUS_HANDLER RootHandler, IN ULONG BusInterruptLevel, IN ULONG BusInterruptVector, OUT PKIRQL Irql, OUT PKAFFINITY Affinity );
ULONGHalpGetBridgedPCIISAInt ( IN PBUS_HANDLER BusHandler, IN PBUS_HANDLER RootHandler, IN ULONG BusInterruptLevel, IN ULONG BusInterruptVector, OUT PKIRQL Irql, OUT PKAFFINITY Affinity );
VOIDHalpPCIBridgedPin2Line ( IN PBUS_HANDLER BusHandler, IN PBUS_HANDLER RootHandler, IN PCI_SLOT_NUMBER SlotNumber, IN PPCI_COMMON_CONFIG PciData );
VOIDHalpPCIBridgedLine2Pin ( IN PBUS_HANDLER BusHandler, IN PBUS_HANDLER RootHandler, IN PCI_SLOT_NUMBER SlotNumber, IN PPCI_COMMON_CONFIG PciNewData, IN PPCI_COMMON_CONFIG PciOldData );
NTSTATUSHalpGetBridgedPCIIrqTable ( IN PBUS_HANDLER BusHandler, IN PBUS_HANDLER RootHandler, IN PCI_SLOT_NUMBER PciSlot, OUT PUCHAR IrqTable );
#ifdef ALLOC_PRAGMA
#pragma alloc_text(INIT,HalpGetPciBridgeConfig)
#pragma alloc_text(INIT,HalpSetPciBridgedVgaCronk)
#pragma alloc_text(INIT,HalpFixupPciSupportedRanges)
#ifdef INIT_PCI_BRIDGE
#pragma alloc_text(PAGE,HalpGetBridgedPCIInterrupt)
//#pragma alloc_text(PAGE,HalpGetBridgedPCIIrqTable)
#pragma alloc_text(INIT,HalpGetPciBridgeNeeds)
#endif
#endif
VOIDHalpCardBusPin2Line( IN PBUS_HANDLER BusHandler, IN PBUS_HANDLER RootHandler, IN PCI_SLOT_NUMBER SlotNumber, IN PPCI_COMMON_CONFIG PciData )
/*++
Routine Description:
Devices on CardBus busses use the interrupt assigned to the bridge. That's how it works.
Arguments:
BusHandler Bus Handler for the bus this (cardbus) device. That is, the bus handler which was created for the bridge under which this device resides. RootHandler Pointer to the bus handler for the root. SlotNumber Slot number for the cardbus device (typically 0). PciData PCI Config space common header (64 bytes).
Return Value:
None.
--*/
{ PPCIPBUSDATA ChildBusData; ULONG Length; UCHAR ParentInterruptLine;
//
// If this device doesn't use interrupts, do nothing.
//
if (!PciData->u.type0.InterruptPin) { return; }
ChildBusData = (PPCIPBUSDATA)BusHandler->BusData;
//
// Read the interrupt information from the parent, ie the
// cardbus bridge's config space.
//
// Note: We use HalGetBusData because it will do the Pin2Line
// function in the parent for us.
Length = HalGetBusDataByOffset( PCIConfiguration, ChildBusData->ParentBus, ChildBusData->CommonData.ParentSlot.u.AsULONG, &ParentInterruptLine, FIELD_OFFSET(PCI_COMMON_CONFIG, u.type2.InterruptLine), sizeof(ParentInterruptLine) );
//
// Return the parent's interrupt line value.
//
PciData->u.type0.InterruptLine = ParentInterruptLine;} VOIDHalpPciMakeBusAChild( IN PBUS_HANDLER Child, IN PBUS_HANDLER Parent )
/*++
Routine Description:
Make bus 'Child' a child of bus 'Parent'. This routine is used when the child bus is disabled or not really present. The child bus consumes no resources.
Arguments:
Child The bus which is to become a child. Parent The bus Child is a child of.
Return Value:
None.
--*/
{ HalpSetBusHandlerParent(Child, Parent); ((PPCIPBUSDATA)(Child->BusData))->ParentBus = (UCHAR)Parent->BusNumber;
//
// Give the bus an empty range list so it isn't
// consumed from the parent.
//
HalpFreeRangeList(Child->BusAddresses); Child->BusAddresses = HalpAllocateNewRangeList();}
BOOLEANHalpGetPciBridgeConfig ( IN ULONG HwType, IN PUCHAR MaxPciBus )/*++
Routine Description:
Scan the devices on all known pci buses trying to locate any pci to pci bridges. Record the hierarchy for the buses, and which buses have what addressing limits.
Arguments:
HwType - Configuration type. MaxPciBus - # of PCI buses reported by the bios
--*/{ PBUS_HANDLER ChildBus; PBUS_HANDLER LastKnownRoot; PPCIPBUSDATA ChildBusData; ULONG d, f, i, j, BusNo; ULONG ChildBusNo, ChildSubNo, ChildPrimaryBusNo; ULONG FixupBusNo; UCHAR Rescan, TestLimit1, TestLimit2; BOOLEAN FoundDisabledBridge; BOOLEAN FoundSomeFunction; CONFIGBRIDGE CB;
Rescan = 0; FoundDisabledBridge = FALSE;
//
// Find each bus on a bridge and initialize it's base and limit information
//
CB.PciData = (PPCI_COMMON_CONFIG) CB.Buffer; CB.SlotNumber.u.bits.Reserved = 0; for (BusNo=0; BusNo < *MaxPciBus; BusNo++) {
CB.BusHandler = HalpHandlerForBus (PCIBus, BusNo); CB.BusData = (PPCIPBUSDATA) CB.BusHandler->BusData; FoundSomeFunction = FALSE;
for (d = 0; d < PCI_MAX_DEVICES; d++) { CB.SlotNumber.u.bits.DeviceNumber = d;
for (f = 0; f < PCI_MAX_FUNCTION; f++) { CB.SlotNumber.u.bits.FunctionNumber = f;
//
// Read PCI configuration information
//
HalpReadPCIConfig ( CB.BusHandler, CB.SlotNumber, CB.PciData, 0, PCI_COMMON_HDR_LENGTH );
if (CB.PciData->VendorID == PCI_INVALID_VENDORID) { // function not populated
continue; }
FoundSomeFunction = TRUE;
if (IsPciBridge(CB.PciData)) {
//
// PCI-PCI bridge
//
ChildBusNo = (ULONG)CB.PciData->u.type1.SecondaryBus; ChildSubNo = (ULONG)CB.PciData->u.type1.SubordinateBus; ChildPrimaryBusNo = (ULONG)CB.PciData->u.type1.PrimaryBus;
} else if (IsCardbusBridge(CB.PciData)) {
//
// PCI-Cardbus bridge
//
ChildBusNo = (ULONG)CB.PciData->u.type2.SecondaryBus; ChildSubNo = (ULONG)CB.PciData->u.type2.SubordinateBus; ChildPrimaryBusNo = (ULONG)CB.PciData->u.type2.PrimaryBus;
} else {
//
// Not a known bridge type, next function.
//
continue; }
//
// Whenever we find a bridge, mark all all bus nodes that
// have not already been processed between this bus and
// the new child as children of this bus.
//
// eg if, on bus 0, we find a bridge to bus 6 thru 8, mark
// busses 1 thru 8 as a child of 0. (unless they have
// already been processed).
//
// This stops non-existant busses in the gap between the
// primary bus and the first child bus from looking like
// additional root busses.
//
for (FixupBusNo = CB.BusHandler->BusNumber + 1; FixupBusNo <= ChildSubNo; FixupBusNo++) {
ChildBus = HalpHandlerForBus(PCIBus, FixupBusNo);
if (ChildBus == NULL) { continue; } ChildBusData = (PPCIPBUSDATA) ChildBus->BusData;
if (ChildBusData->BridgeConfigRead) {
//
// This child bus's relationships already processed
//
continue; } HalpPciMakeBusAChild(ChildBus, CB.BusHandler); ChildBusData->CommonData.ParentSlot = CB.SlotNumber; }
if (!(CB.PciData->Command & (PCI_ENABLE_IO_SPACE | PCI_ENABLE_MEMORY_SPACE))) { // this PCI bridge is not enabled - skip it for now
FoundDisabledBridge = TRUE;
// Even though the bridge is disabled the bus number
// may have been set. If so then update the parent
// child relation ship so that the we do not see this
// as a root bus.
if (ChildBusNo <= CB.BusHandler->BusNumber) { continue; }
ChildBus = HalpHandlerForBus (PCIBus, ChildBusNo); if (ChildBus == NULL) {
//
// Even though the bus is currently disabled,
// the system may configure it so we still
// want a bus handler created for it.
//
if (ChildBusNo > Rescan) { Rescan = (UCHAR)ChildBusNo; } continue; } ChildBusData = (PPCIPBUSDATA) ChildBus->BusData; if (ChildBusData->BridgeConfigRead) { // this child buses relationships already processed
continue; } HalpPciMakeBusAChild(ChildBus, CB.BusHandler); ChildBusData->CommonData.ParentSlot = CB.SlotNumber;
//
// Even though we won't actually configure the
// bridge, mark the configuration as read so we
// don't mistake it for a root bus.
//
ChildBusData->BridgeConfigRead = TRUE; continue; }
if (ChildPrimaryBusNo != CB.BusHandler->BusNumber) {
DBGMSG ("HAL GetPciData: bad primarybus!!!\n"); // skip it...
continue; }
if (ChildBusNo <= CB.BusHandler->BusNumber) {
// secondary bus number doesn't make any sense. HP Omnibook may
// not fill this field in on a virtually disabled pci-pci bridge
FoundDisabledBridge = TRUE; continue; }
//
// Found a PCI-PCI bridge. Determine it's parent child
// releationships
//
ChildBus = HalpHandlerForBus (PCIBus, ChildBusNo); if (!ChildBus) { DBGMSG ("HAL GetPciData: found configured pci bridge\n");
// up the number of buses
if (ChildBusNo > Rescan) { Rescan = (UCHAR)ChildBusNo; } continue; }
ChildBusData = (PPCIPBUSDATA) ChildBus->BusData; if (ChildBusData->BridgeConfigRead) { // this child buses releationships already processed
continue; }
//
// Remember the limits which are programmed into this bridge
//
ChildBusData->BridgeConfigRead = TRUE; HalpSetBusHandlerParent (ChildBus, CB.BusHandler); ChildBusData->ParentBus = (UCHAR) CB.BusHandler->BusNumber; ChildBusData->CommonData.ParentSlot = CB.SlotNumber;
if (IsCardbusBridge(CB.PciData)) {
//
// Cardbus handled by the PCI driver, don't try to
// interpret here.
//
HalpFreeRangeList(ChildBus->BusAddresses); ChildBus->BusAddresses = HalpAllocateNewRangeList();
//
// Pin to Line (and vis-versa) for a device plugged
// into the cardbus bus, get the same values as the
// bridge itself. Override the line2pin routine in
// the cardbus bridge handler to use the parent's
// slot value. Note: line2pin doesn't do much.
// In DBG PC/AT builds, it simply undoes the IRQXOR
// used to catch drivers that are accessing the h/w
// directly. The normal routine will do this just
// fine so we don't need to override it as well.
//
ChildBusData->CommonData.Pin2Line = HalpCardBusPin2Line; continue; }
ChildBus->BusAddresses->IO.Base = PciBridgeIO2Base( CB.PciData->u.type1.IOBase, CB.PciData->u.type1.IOBaseUpper16 );
ChildBus->BusAddresses->IO.Limit = PciBridgeIO2Limit( CB.PciData->u.type1.IOLimit, CB.PciData->u.type1.IOLimitUpper16 );
ChildBus->BusAddresses->IO.SystemAddressSpace = 1;
//
// Special VGA address remapping occuring on this bridge?
//
if (CB.PciData->u.type1.BridgeControl & PCI_ENABLE_BRIDGE_VGA) {
//
// Yes, then this bridge is positively decoding the
// range 0xA0000 thru 0xBFFFF regardless of the memory
// range settings. Add this range, if it overlaps it
// will get cleaned up later.
//
// Also, IO ranges 3b0 thru 3bb and 3c0 thru 3df.
//
HalpAddRange( &ChildBus->BusAddresses->Memory, 0, // address space
0, // system base
0xa0000, // range base
0xbffff // range limit
);
HalpAddRange( &ChildBus->BusAddresses->IO, 1, // address space
0, // system base
0x3b0, // range base
0x3bb // range limit
);
HalpAddRange( &ChildBus->BusAddresses->IO, 1, // address space
0, // system base
0x3c0, // range base
0x3df // range limit
);
//
// Claim all aliases to these IO addresses.
//
// Bits 15:10 are not decoded so anything in
// the same 10 bits as the above in the range
// 0x400 thru 0xffff is an alias.
//
HalpSetPciBridgedVgaCronk ( ChildBus->BusNumber, 0x0400, 0xffff ); }
//
// If supported I/O ranges on this bus are limitied to
// 256bytes on every 1K aligned boundry within the
// range, then redo supported IO BusAddresses to match
//
if (CB.PciData->u.type1.BridgeControl & PCI_ENABLE_BRIDGE_ISA && ChildBus->BusAddresses->IO.Base < ChildBus->BusAddresses->IO.Limit) {
// assume Base is 1K aligned
i = (ULONG) ChildBus->BusAddresses->IO.Base; j = (ULONG) ChildBus->BusAddresses->IO.Limit;
// convert head entry
ChildBus->BusAddresses->IO.Limit = i + 255; i += 1024;
// add remaining ranges
while (i < j) { HalpAddRange ( &ChildBus->BusAddresses->IO, 1, // address space
0, // system base
i, // bus address
i + 255 // bus limit
);
// next range
i += 1024; } }
ChildBus->BusAddresses->Memory.Base = PciBridgeMemory2Base(CB.PciData->u.type1.MemoryBase);
ChildBus->BusAddresses->Memory.Limit = PciBridgeMemory2Limit(CB.PciData->u.type1.MemoryLimit);
// On x86 it's ok to clip Prefetch to 32 bits
if (CB.PciData->u.type1.PrefetchBaseUpper32 == 0) { ChildBus->BusAddresses->PrefetchMemory.Base = PciBridgeMemory2Base(CB.PciData->u.type1.PrefetchBase);
ChildBus->BusAddresses->PrefetchMemory.Limit = PciBridgeMemory2Limit(CB.PciData->u.type1.PrefetchLimit);
if (CB.PciData->u.type1.PrefetchLimitUpper32) { ChildBus->BusAddresses->PrefetchMemory.Limit = 0xffffffff; } }
//
// h/w hack the Win9x people allowed folks to make. Determine
// if the bridge is subtractive decode or not by seeing if
// it's IObase/limit is read-only.
//
TestLimit1 = CB.PciData->u.type1.IOLimit + 1; if (!TestLimit1) { TestLimit1 = 0xFE; }#if 0
DbgPrint ("PciBridge OrigLimit=%d TestLimit=%d ", CB.PciData->u.type1.IOLimit, TestLimit1 );#endif
HalpWritePCIConfig ( CB.BusHandler, CB.SlotNumber, &TestLimit1, FIELD_OFFSET (PCI_COMMON_CONFIG, u.type1.IOLimit), 1 );
HalpReadPCIConfig ( CB.BusHandler, CB.SlotNumber, &TestLimit2, FIELD_OFFSET (PCI_COMMON_CONFIG, u.type1.IOLimit), 1 );
HalpWritePCIConfig ( CB.BusHandler, CB.SlotNumber, &CB.PciData->u.type1.IOLimit, FIELD_OFFSET (PCI_COMMON_CONFIG, u.type1.IOLimit), 1 );
ChildBusData->Subtractive = TestLimit1 != TestLimit2;#if 0
DbgPrint ("Result=%d, Subtractive=%d\n", TestLimit2, ChildBusData->Subtractive );
DbgPrint ("Device buffer %x\n", CB.PciData);#endif
//
// Now if its substractive, assume no range means the entire
// range.
//
if (ChildBusData->Subtractive) {
if (ChildBus->BusAddresses->IO.Base == PciBridgeIO2Base(0,0) && ChildBus->BusAddresses->IO.Limit <= PciBridgeIO2Limit(0,0)) {
ChildBus->BusAddresses->IO.Limit = 0x7FFFFFFFFFFFFFFF;
if (ChildBus->BusAddresses->Memory.Base == PciBridgeMemory2Base(0)) { ChildBus->BusAddresses->Memory.Limit = 0x7FFFFFFFFFFFFFFF; } } }
// should call HalpAssignPCISlotResources to assign
// baseaddresses, etc...
} } if (!((PPCIPBUSDATA)(CB.BusHandler->BusData))->BridgeConfigRead) {
//
// We believe this bus to be a root.
//
if ((FoundSomeFunction == FALSE) && (BusNo != 0)) {
//
// Nothing found on this bus. Assume it's not really
// a root. (Always assume 0 is a root). (This bus
// probably doesn't exist at all but ntdetect doesn't
// tell us that).
//
// Pretend this bus is a child of the last known root.
// At least this way it won't get a PDO and be handed
// to the PCI driver.
//
HalpPciMakeBusAChild(CB.BusHandler, LastKnownRoot);
} else {
//
// Found something on it (or it's zero), set as last
// known root.
//
LastKnownRoot = CB.BusHandler; } } }
if (Rescan) { *MaxPciBus = Rescan+1; return TRUE; }
if (!FoundDisabledBridge) { return FALSE; }
DBGMSG ("HAL GetPciData: found disabled pci bridge\n");
#ifdef INIT_PCI_BRIDGE
//
// We've calculated all the parent's buses known bases & limits.
// While doing this a pci-pci bus was found that the bios didn't
// configure. This is not expected, and we'll make some guesses
// at a configuration here and enable it.
//
// (this code is primarily for testing the above code since
// currently no system bioses actually configure the child buses)
//
for (BusNo=0; BusNo < *MaxPciBus; BusNo++) {
CB.BusHandler = HalpHandlerForBus (PCIBus, BusNo); CB.BusData = (PPCIPBUSDATA) CB.BusHandler->BusData;
for (d = 0; d < PCI_MAX_DEVICES; d++) { CB.SlotNumber.u.bits.DeviceNumber = d;
for (f = 0; f < PCI_MAX_FUNCTION; f++) { CB.SlotNumber.u.bits.FunctionNumber = f;
HalpReadPCIConfig ( CB.BusHandler, CB.SlotNumber, CB.PciData, 0, PCI_COMMON_HDR_LENGTH );
if (CB.PciData->VendorID == PCI_INVALID_VENDORID) { continue; }
if (!IsPciBridge (CB.PciData)) { // not a PCI-PCI bridge
continue; }
if ((CB.PciData->Command & (PCI_ENABLE_IO_SPACE | PCI_ENABLE_MEMORY_SPACE))) { // this PCI bridge is enabled
continue; }
//
// We have a disabled bus - assign it a number, then
// determine all the requirements of all devices
// on the other side of this bridge
//
CB.BusNo = BusNo; HalpGetPciBridgeNeeds (HwType, MaxPciBus, &CB); } } } // preform Rescan
return TRUE;
#else
return FALSE;
#endif
}
VOIDHalpFixupPciSupportedRanges ( IN ULONG MaxBuses )/*++
Routine Description:
PCI-PCI bridged buses only see addresses which their parent bueses support. So adjust any PCI SUPPORT_RANGES to be a complete subset of all of it's parent buses.
For PCI-PCI briges which use postive address decode to forward addresses, remove any addresses from any PCI bus which are bridged to a child PCI bus.
--*/{ ULONG i; PBUS_HANDLER Bus, ParentBus; PPCIPBUSDATA BusData; PSUPPORTED_RANGES HRanges;
//
// Pass 1 - shrink all PCI supported ranges to be a subset of
// all of it's parent buses
//
for (i = 0; i < MaxBuses; i++) {
Bus = HalpHandlerForBus (PCIBus, i);
ParentBus = Bus->ParentHandler; while (ParentBus) {
HRanges = Bus->BusAddresses; Bus->BusAddresses = HalpMergeRanges ( ParentBus->BusAddresses, HRanges );
HalpFreeRangeList (HRanges); ParentBus = ParentBus->ParentHandler; } }
//
// Pass 2 - remove all positive child PCI bus ranges from parent PCI buses
//
for (i = 0; i < MaxBuses; i++) { Bus = HalpHandlerForBus (PCIBus, i); BusData = (PPCIPBUSDATA) Bus->BusData;
//
// If the bridge is not subtractive, remove the ranges from the parents
//
if (!BusData->Subtractive) {
ParentBus = Bus->ParentHandler; while (ParentBus) {
if (ParentBus->InterfaceType == PCIBus) { HalpRemoveRanges ( ParentBus->BusAddresses, Bus->BusAddresses ); }
ParentBus = ParentBus->ParentHandler; } } }
//
// Cleanup
//
for (i = 0; i < MaxBuses; i++) { Bus = HalpHandlerForBus (PCIBus, i); HalpConsolidateRanges (Bus->BusAddresses); }}
VOIDHalpSetPciBridgedVgaCronk ( IN ULONG BusNumber, IN ULONG BaseAddress, IN ULONG LimitAddress )/*++
Routine Description: .
The 'vga compatible addresses' bit is set in the bridge control regiter. This causes the bridge to pass any I/O address in the range of: 10bit decode 3b0-3bb & 3c0-3df, as TEN bit addresses.
As far as I can tell this "feature" is an attempt to solve some problem which the folks solving it did not fully understand, so instead of doing it right we have this fine mess.
The solution is to take the least of all evils which is to remove any I/O port ranges which are getting remapped from any IoAssignResource request. (ie, IoAssignResources will never contimplate giving any I/O port out in the suspected ranges).
note: memory allocation error here is fatal so don't bother with the return codes.
Arguments:
Base - Base of IO address range in question Limit - Limit of IO address range in question
--*/{ UNICODE_STRING unicodeString; OBJECT_ATTRIBUTES objectAttributes; HANDLE handle; ULONG Length; PCM_RESOURCE_LIST ResourceList; PCM_PARTIAL_RESOURCE_DESCRIPTOR Descriptor; ULONG AddressMSBs; WCHAR ValueName[80]; NTSTATUS status;
//
// Open reserved resource settings
//
RtlInitUnicodeString (&unicodeString, rgzReservedResources); InitializeObjectAttributes( &objectAttributes, &unicodeString, OBJ_CASE_INSENSITIVE, NULL, (PSECURITY_DESCRIPTOR) NULL );
status = ZwOpenKey( &handle, KEY_READ|KEY_WRITE, &objectAttributes); if (!NT_SUCCESS(status)) { return; }
//
// Build resource list of reseved ranges
//
Length = ((LimitAddress - BaseAddress) / 1024 + 2) * 2 * sizeof (CM_PARTIAL_RESOURCE_DESCRIPTOR) + sizeof (CM_RESOURCE_LIST);
ResourceList = (PCM_RESOURCE_LIST)ExAllocatePoolWithTag(PagedPool, Length, HAL_POOL_TAG); if (!ResourceList) {
//
// Can't possibly be out of paged pool at this stage of the
// game. This system is very unwell, get out.
//
return; } RtlZeroMemory(ResourceList, Length);
ResourceList->Count = 1; ResourceList->List[0].InterfaceType = PCIBus; ResourceList->List[0].BusNumber = BusNumber; Descriptor = ResourceList->List[0].PartialResourceList.PartialDescriptors;
while (BaseAddress < LimitAddress) { AddressMSBs = BaseAddress & ~0x3ff; // get upper 10bits of addr
//
// Add xx3b0 through xx3bb
//
Descriptor->Type = CmResourceTypePort; Descriptor->ShareDisposition = CmResourceShareDeviceExclusive; Descriptor->Flags = CM_RESOURCE_PORT_IO; Descriptor->u.Port.Start.QuadPart = AddressMSBs | 0x3b0; Descriptor->u.Port.Length = 0xb;
Descriptor += 1; ResourceList->List[0].PartialResourceList.Count += 1;
//
// Add xx3c0 through xx3df
//
Descriptor->Type = CmResourceTypePort; Descriptor->ShareDisposition = CmResourceShareDeviceExclusive; Descriptor->Flags = CM_RESOURCE_PORT_IO; Descriptor->u.Port.Start.QuadPart = AddressMSBs | 0x3c0; Descriptor->u.Port.Length = 0x1f;
Descriptor += 1; ResourceList->List[0].PartialResourceList.Count += 1;
//
// Next range
//
BaseAddress += 1024; }
//
// Add the reserved ranges to avoid during IoAssignResource
//
swprintf(ValueName, L"HAL_PCI_%d", BusNumber); RtlInitUnicodeString(&unicodeString, ValueName);
ZwSetValueKey(handle, &unicodeString, 0L, REG_RESOURCE_LIST, ResourceList, (ULONG) Descriptor - (ULONG) ResourceList );
ExFreePool(ResourceList); ZwClose(handle);}
#ifdef INIT_PCI_BRIDGE
VOIDHalpGetPciBridgeNeeds ( IN ULONG HwType, IN PUCHAR MaxPciBus, IN PCONFIGBRIDGE Current ){ ACCESS_MASK DesiredAccess; UNICODE_STRING unicodeString; PUCHAR buffer; HANDLE handle; OBJECT_ATTRIBUTES objectAttributes; PCM_FULL_RESOURCE_DESCRIPTOR Descriptor; PCONFIGURATION_COMPONENT Component; CONFIGBRIDGE CB; ULONG mnum, d, f, i; NTSTATUS status;
buffer = ExAllocatePoolWithTag(PagedPool, 1024, HAL_POOL_TAG);
if (!buffer) {
//
// Give up, we're not going anywhere anyway.
//
return; }
//
// Init CB structure
//
CB.PciData = (PPCI_COMMON_CONFIG) CB.Buffer; CB.SlotNumber.u.bits.Reserved = 0; Current->IO = Current->Memory = Current->PFMemory = 0;
//
// Assign this bridge an ID, and turn on configuration space
//
Current->PciData->u.type1.PrimaryBus = (UCHAR) Current->BusNo; Current->PciData->u.type1.SecondaryBus = (UCHAR) *MaxPciBus; Current->PciData->u.type1.SubordinateBus = (UCHAR) 0xFF; Current->PciData->u.type1.SecondaryStatus = 0xffff; Current->PciData->Status = 0xffff; Current->PciData->Command = 0;
Current->PciData->u.type1.BridgeControl = PCI_ASSERT_BRIDGE_RESET;
HalpWritePCIConfig ( Current->BusHandler, Current->SlotNumber, Current->PciData, 0, PCI_COMMON_HDR_LENGTH );
KeStallExecutionProcessor (100);
Current->PciData->u.type1.BridgeControl = 0; HalpWritePCIConfig ( Current->BusHandler, Current->SlotNumber, Current->PciData, 0, PCI_COMMON_HDR_LENGTH );
KeStallExecutionProcessor (100);
//
// Allocate new handler for bus
//
CB.BusHandler = HalpAllocateAndInitPciBusHandler (HwType, *MaxPciBus, FALSE); CB.BusData = (PPCIPBUSDATA) CB.BusHandler->BusData; CB.BusNo = *MaxPciBus; *MaxPciBus += 1;
//
// Add another PCI bus in the registry
//
mnum = 0; for (; ;) { //
// Find next available MultiFunctionAdapter key
//
DesiredAccess = KEY_READ | KEY_WRITE; swprintf ((PWCHAR) buffer, L"%s\\%d", rgzMultiFunctionAdapter, mnum); RtlInitUnicodeString (&unicodeString, (PWCHAR) buffer);
InitializeObjectAttributes( &objectAttributes, &unicodeString, OBJ_CASE_INSENSITIVE, NULL, (PSECURITY_DESCRIPTOR) NULL );
status = ZwOpenKey( &handle, DesiredAccess, &objectAttributes); if (!NT_SUCCESS(status)) { break; }
// already exists, next
ZwClose (handle); mnum += 1; }
ZwCreateKey (&handle, DesiredAccess, &objectAttributes, 0, NULL, REG_OPTION_VOLATILE, &d );
//
// Add needed registry values for this MultifucntionAdapter entry
//
RtlInitUnicodeString (&unicodeString, rgzIdentifier); ZwSetValueKey (handle, &unicodeString, 0L, REG_SZ, L"PCI", sizeof (L"PCI") );
RtlInitUnicodeString (&unicodeString, rgzConfigurationData); Descriptor = (PCM_FULL_RESOURCE_DESCRIPTOR) buffer; Descriptor->InterfaceType = PCIBus; Descriptor->BusNumber = CB.BusNo; Descriptor->PartialResourceList.Version = 0; Descriptor->PartialResourceList.Revision = 0; Descriptor->PartialResourceList.Count = 0; ZwSetValueKey (handle, &unicodeString, 0L, REG_FULL_RESOURCE_DESCRIPTOR, Descriptor, sizeof (*Descriptor) );
RtlInitUnicodeString (&unicodeString, L"Component Information"); Component = (PCONFIGURATION_COMPONENT) buffer; RtlZeroMemory (Component, sizeof (*Component)); Component->AffinityMask = 0xffffffff; ZwSetValueKey (handle, &unicodeString, 0L, REG_BINARY, Component, FIELD_OFFSET (CONFIGURATION_COMPONENT, ConfigurationDataLength) );
ZwClose (handle);
//
// Since the BIOS didn't configure this bridge we'll assume that
// the PCI interrupts are bridged. (for BIOS configured buses we
// assume that the BIOS put the ISA bus IRQ in the InterruptLine value)
//
CB.BusData->Pin2Line = (PciPin2Line) HalpPCIBridgedPin2Line; CB.BusData->Line2Pin = (PciLine2Pin) HalpPCIBridgedLine2Pin; //CB.BusData->GetIrqTable = (PciIrqTable) HalpGetBridgedPCIIrqTable;
if (Current->BusHandler->GetInterruptVector == HalpGetPCIIntOnISABus) {
//
// The parent bus'es interrupt pin to vector mappings is not
// a static function, and is determined by the boot firmware.
//
//CB.BusHandler->GetInterruptVector = (PGETINTERRUPTVECTOR) HalpGetBridgedPCIISAInt;
// read each device on parent bus
for (d = 0; d < PCI_MAX_DEVICES; d++) { CB.SlotNumber.u.bits.DeviceNumber = d;
for (f = 0; f < PCI_MAX_FUNCTION; f++) { CB.SlotNumber.u.bits.FunctionNumber = f;
HalpReadPCIConfig ( Current->BusHandler, CB.SlotNumber, CB.PciData, 0, PCI_COMMON_HDR_LENGTH );
if (CB.PciData->VendorID == PCI_INVALID_VENDORID) { continue; }
if (CB.PciData->u.type0.InterruptPin && (PCI_CONFIG_TYPE (CB.PciData) == PCI_DEVICE_TYPE || PCI_CONFIG_TYPE (CB.PciData) == PCI_BRIDGE_TYPE)) {
// get bios supplied int mapping
i = CB.PciData->u.type0.InterruptPin + d % 4; CB.BusData->SwizzleIn[i] = CB.PciData->u.type0.InterruptLine; } } }
} else { _asm int 3; }
//
// Look at each device on the bus and determine it's resource needs
//
for (d = 0; d < PCI_MAX_DEVICES; d++) { CB.SlotNumber.u.bits.DeviceNumber = d;
for (f = 0; f < PCI_MAX_FUNCTION; f++) { CB.SlotNumber.u.bits.FunctionNumber = f;
HalpReadPCIConfig ( CB.BusHandler, CB.SlotNumber, CB.PciData, 0, PCI_COMMON_HDR_LENGTH );
if (CB.PciData->VendorID == PCI_INVALID_VENDORID) { continue; }
if (IsPciBridge (CB.PciData)) { // oh look - another bridge ...
HalpGetPciBridgeNeeds (HwType, MaxPciBus, &CB); continue; }
if (PCI_CONFIG_TYPE (CB.PciData) != PCI_DEVICE_TYPE) { continue; }
// found a device - figure out the resources it needs
} }
//
// Found all sub-buses set SubordinateBus accordingly
//
Current->PciData->u.type1.SubordinateBus = (UCHAR) *MaxPciBus - 1;
HalpWritePCIConfig ( Current->BusHandler, Current->SlotNumber, Current->PciData, 0, PCI_COMMON_HDR_LENGTH );
//
// Set the bridges IO, Memory, and Prefetch Memory windows
//
// For now just pick some numbers & set everyone the same
// IO 0x6000 - 0xFFFF
// MEM 0x40000000 - 0x4FFFFFFF
// PFMEM 0x50000000 - 0x5FFFFFFF
Current->PciData->u.type1.IOBase = 0x6000 >> 12 << 4; Current->PciData->u.type1.IOLimit = 0xffff >> 12 << 4; Current->PciData->u.type1.MemoryBase = 0x40000000 >> 20 << 4; Current->PciData->u.type1.MemoryLimit = 0x4fffffff >> 20 << 4; Current->PciData->u.type1.PrefetchBase = 0x50000000 >> 20 << 4; Current->PciData->u.type1.PrefetchLimit = 0x5fffffff >> 20 << 4;
Current->PciData->u.type1.PrefetchBaseUpper32 = 0; Current->PciData->u.type1.PrefetchLimitUpper32 = 0; Current->PciData->u.type1.IOBaseUpper16 = 0; Current->PciData->u.type1.IOLimitUpper16 = 0; Current->PciData->u.type1.BridgeControl = PCI_ENABLE_BRIDGE_ISA;
HalpWritePCIConfig ( Current->BusHandler, Current->SlotNumber, Current->PciData, 0, PCI_COMMON_HDR_LENGTH );
HalpReadPCIConfig ( Current->BusHandler, Current->SlotNumber, Current->PciData, 0, PCI_COMMON_HDR_LENGTH );
// enable memory & io decodes
Current->PciData->Command = PCI_ENABLE_IO_SPACE | PCI_ENABLE_MEMORY_SPACE | PCI_ENABLE_BUS_MASTER;
HalpWritePCIConfig ( Current->BusHandler, Current->SlotNumber, &Current->PciData->Command, FIELD_OFFSET (PCI_COMMON_CONFIG, Command), sizeof (Current->PciData->Command) );
ExFreePool (buffer);}
VOIDHalpPCIBridgedPin2Line ( IN PBUS_HANDLER BusHandler, IN PBUS_HANDLER RootHandler, IN PCI_SLOT_NUMBER SlotNumber, IN PPCI_COMMON_CONFIG PciData )/*++
This function maps the device's InterruptPin to an InterruptLine value.
test function particular to dec pci-pci bridge card
--*/{ PPCIPBUSDATA BusData; ULONG i;
if (!PciData->u.type0.InterruptPin) { return ; }
BusData = (PPCIPBUSDATA) BusHandler->BusData;
//
// Convert slot Pin into Bus INTA-D.
//
i = (PciData->u.type0.InterruptPin + SlotNumber.u.bits.DeviceNumber - 1) % 4;
PciData->u.type0.InterruptLine = BusData->SwizzleIn[i] ^ IRQXOR; PciData->u.type0.InterruptLine = 0x0b ^ IRQXOR;}
VOIDHalpPCIBridgedLine2Pin ( IN PBUS_HANDLER BusHandler, IN PBUS_HANDLER RootHandler, IN PCI_SLOT_NUMBER SlotNumber, IN PPCI_COMMON_CONFIG PciNewData, IN PPCI_COMMON_CONFIG PciOldData )/*++
This functions maps the device's InterruptLine to it's device specific InterruptPin value.
test function particular to dec pci-pci bridge card
--*/{ PPCIPBUSDATA BusData; ULONG i;
if (!PciNewData->u.type0.InterruptPin) { return ; }
BusData = (PPCIPBUSDATA) BusHandler->BusData;
i = (PciNewData->u.type0.InterruptPin + SlotNumber.u.bits.DeviceNumber - 1) % 4;
PciNewData->u.type0.InterruptLine = BusData->SwizzleIn[i] ^ IRQXOR; PciNewData->u.type0.InterruptLine = 0x0b ^ IRQXOR;}
#endif
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