You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
235 lines
4.0 KiB
235 lines
4.0 KiB
/*++
|
|
|
|
Copyright (c) 1994 Microsoft Corporation
|
|
|
|
Module Name:
|
|
|
|
inoutops.c
|
|
|
|
Abstract:
|
|
|
|
This module implements the code to emulate the in and out opcodes.
|
|
|
|
Author:
|
|
|
|
David N. Cutler (davec) 7-Nov-1994
|
|
|
|
Environment:
|
|
|
|
Kernel mode only.
|
|
|
|
Revision History:
|
|
|
|
--*/
|
|
|
|
#include "nthal.h"
|
|
#include "emulate.h"
|
|
|
|
VOID
|
|
XmInOp (
|
|
IN PRXM_CONTEXT P
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
This function emulates a inb/w/d opcode.
|
|
|
|
Arguments:
|
|
|
|
P - Supplies a pointer to the emulation context structure.
|
|
|
|
Return Value:
|
|
|
|
None.
|
|
|
|
--*/
|
|
|
|
{
|
|
|
|
//
|
|
// Check if the I/O port number is valid.
|
|
//
|
|
|
|
if ((P->SrcValue.Long + P->DataType) > 0xffff) {
|
|
longjmp(&P->JumpBuffer[0], XM_ILLEGAL_PORT_NUMBER);
|
|
}
|
|
|
|
//
|
|
// Set the destination address, input from the specified port, and
|
|
// store the result.
|
|
//
|
|
|
|
P->DstLong = (ULONG UNALIGNED *)(&P->Gpr[EAX].Exx);
|
|
XmStoreResult(P, (P->ReadIoSpace)(P->DataType, P->SrcValue.Word));
|
|
return;
|
|
}
|
|
|
|
VOID
|
|
XmInsOp (
|
|
IN PRXM_CONTEXT P
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
This function emulates a insb/w/d opcode.
|
|
|
|
Arguments:
|
|
|
|
P - Supplies a pointer to the emulation context structure.
|
|
|
|
Return Value:
|
|
|
|
None.
|
|
|
|
--*/
|
|
|
|
{
|
|
|
|
ULONG Count;
|
|
USHORT PortNumber;
|
|
|
|
//
|
|
// If a repeat prefix is active, then the loop count is specified
|
|
// by eCX. Otherwise, the loop count is one.
|
|
//
|
|
|
|
Count = 1;
|
|
if (P->RepeatPrefixActive != FALSE) {
|
|
if (P->OpaddrPrefixActive != FALSE) {
|
|
Count = P->Gpr[ECX].Exx;
|
|
P->Gpr[ECX].Exx = 0;
|
|
|
|
} else {
|
|
Count = P->Gpr[CX].Xx;
|
|
P->Gpr[CX].Xx = 0;
|
|
}
|
|
}
|
|
|
|
//
|
|
// Move items from the input port to the destination string.
|
|
//
|
|
|
|
PortNumber = P->SrcValue.Word;
|
|
while (Count != 0) {
|
|
|
|
//
|
|
// Set the destination address, input from the specified port, and
|
|
// store the result.
|
|
//
|
|
|
|
P->DstLong = (ULONG UNALIGNED *)XmGetStringAddress(P, ES, EDI);
|
|
XmStoreResult(P, (P->ReadIoSpace)(P->DataType, PortNumber));
|
|
Count -= 1;
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
VOID
|
|
XmOutOp (
|
|
IN PRXM_CONTEXT P
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
This function emulates a outb/w/d opcode.
|
|
|
|
Arguments:
|
|
|
|
P - Supplies a pointer to the emulation context structure.
|
|
|
|
Return Value:
|
|
|
|
None.
|
|
|
|
--*/
|
|
|
|
{
|
|
|
|
USHORT PortNumber;
|
|
|
|
//
|
|
// Check if the I/O port number is valid.
|
|
//
|
|
|
|
if ((P->SrcValue.Long + P->DataType) > 0xffff) {
|
|
longjmp(&P->JumpBuffer[0], XM_ILLEGAL_PORT_NUMBER);
|
|
}
|
|
|
|
//
|
|
// Save the port number, get the source value, and output to the port.
|
|
//
|
|
|
|
PortNumber = P->SrcValue.Word;
|
|
XmSetSourceValue(P, &P->Gpr[EAX].Exx);
|
|
(P->WriteIoSpace)(P->DataType, PortNumber, P->SrcValue.Long);
|
|
return;
|
|
}
|
|
|
|
VOID
|
|
XmOutsOp (
|
|
IN PRXM_CONTEXT P
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
This function emulates a outsb/w/d opcode.
|
|
|
|
Arguments:
|
|
|
|
P - Supplies a pointer to the emulation context structure.
|
|
|
|
Return Value:
|
|
|
|
None.
|
|
|
|
--*/
|
|
|
|
{
|
|
|
|
ULONG Count;
|
|
USHORT PortNumber;
|
|
|
|
//
|
|
// If a repeat prefix is active, then the loop count is specified
|
|
// by eCX. Otherwise, the loop count is one.
|
|
//
|
|
|
|
Count = 1;
|
|
if (P->RepeatPrefixActive != FALSE) {
|
|
if (P->OpaddrPrefixActive != FALSE) {
|
|
Count = P->Gpr[ECX].Exx;
|
|
P->Gpr[ECX].Exx = 0;
|
|
|
|
} else {
|
|
Count = P->Gpr[CX].Xx;
|
|
P->Gpr[CX].Xx = 0;
|
|
}
|
|
}
|
|
|
|
//
|
|
// Move items from the source string to the output port.
|
|
//
|
|
|
|
PortNumber = P->SrcValue.Word;
|
|
while (Count != 0) {
|
|
|
|
//
|
|
// Set the source value and output to the specified port.
|
|
//
|
|
|
|
XmSetSourceValue(P, XmGetStringAddress(P, P->DataSegment, ESI));
|
|
(P->WriteIoSpace)(P->DataType, PortNumber, P->SrcValue.Long);
|
|
Count -= 1;
|
|
}
|
|
|
|
return;
|
|
}
|