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101 lines
2.7 KiB
C
101 lines
2.7 KiB
C
/*
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* COPYRIGHT: GPL - See COPYING in the top level directory
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* PROJECT: ReactOS Virtual DOS Machine
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* FILE: subsystems/mvdm/ntvdm/bios/kbdbios.c
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* PURPOSE: VDM 32-bit PS/2 Keyboard BIOS Support Library
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* PROGRAMMERS: Hermes Belusca-Maito (hermes.belusca@sfr.fr)
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*/
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/* INCLUDES *******************************************************************/
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#include "ntvdm.h"
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#define NDEBUG
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#include <debug.h>
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#include "emulator.h"
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#include "cpu/bop.h"
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#include "int32.h"
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#include "bios.h"
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// #include "kbdbios.h"
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/* DEFINES ********************************************************************/
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/* BOP Identifiers */
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#define BOP_KBD_IRQ 0x09
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#define BOP_KBD_INT 0x16
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/* PUBLIC FUNCTIONS ***********************************************************/
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extern VOID WINAPI BiosKeyboardIrq(LPWORD Stack);
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static VOID WINAPI KbdBiosIRQ(LPWORD Stack)
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{
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/*
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* Set up a false stack to hardwire the BOP function (that can directly
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* manipulate CPU registers) to the 32-bit interrupt function (which uses
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* the stack to be able to modify the original CS:IP and FLAGS).
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*
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* See int32.h stack codes.
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*/
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WORD EmuStack[4];
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DWORD Flags = getEFLAGS();
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DPRINT1("Calling BOP KbdBiosIRQ\n");
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EmuStack[STACK_FLAGS] = LOWORD(Flags);
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EmuStack[STACK_CS] = getCS();
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EmuStack[STACK_IP] = getIP();
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EmuStack[STACK_INT_NUM] = BOP_KBD_IRQ;
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BiosKeyboardIrq(EmuStack);
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setIP(EmuStack[STACK_IP]);
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setCS(EmuStack[STACK_CS]);
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setEFLAGS(MAKELONG(EmuStack[STACK_FLAGS], HIWORD(Flags)));
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}
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extern VOID WINAPI BiosKeyboardService(LPWORD Stack);
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static VOID WINAPI KbdBiosINT(LPWORD Stack)
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{
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/*
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* Set up a false stack to hardwire the BOP function (that can directly
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* manipulate CPU registers) to the 32-bit interrupt function (which uses
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* the stack to be able to modify the original CS:IP and FLAGS).
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*
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* See int32.h stack codes.
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*/
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WORD EmuStack[4];
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DWORD Flags = getEFLAGS();
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DPRINT1("Calling BOP KbdBiosINT\n");
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EmuStack[STACK_FLAGS] = LOWORD(Flags);
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EmuStack[STACK_CS] = getCS();
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EmuStack[STACK_IP] = getIP();
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EmuStack[STACK_INT_NUM] = BOP_KBD_IRQ;
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BiosKeyboardService(EmuStack);
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setIP(EmuStack[STACK_IP]);
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setCS(EmuStack[STACK_CS]);
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setEFLAGS(MAKELONG(EmuStack[STACK_FLAGS], HIWORD(Flags)));
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}
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BOOLEAN KbdBiosInitialize(VOID)
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{
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/* Register the BIOS support BOPs */
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RegisterBop(BOP_KBD_IRQ, KbdBiosIRQ); // BiosKeyboardIrq in kbdbios32.c
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RegisterBop(BOP_KBD_INT, KbdBiosINT); // BiosKeyboardService in kbdbios32.c
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return TRUE;
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}
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VOID KbdBiosCleanup(VOID)
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{
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/* Unregister the BIOS support BOPs */
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RegisterBop(BOP_KBD_IRQ, NULL);
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RegisterBop(BOP_KBD_INT, NULL);
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}
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/* EOF */
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