+++ /dev/null
-/*
- * COPYRIGHT: GPL - See COPYING in the top level directory
- * PROJECT: ReactOS Virtual DOS Machine
- * FILE: subsystems/mvdm/ntvdm/bios/bios32/bios32.c
- * PURPOSE: VDM 32-bit BIOS
- * PROGRAMMERS: Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
- * Hermes Belusca-Maito (hermes.belusca@sfr.fr)
- */
-
-/* INCLUDES *******************************************************************/
-
-#include "ntvdm.h"
-
-/* BIOS Version number and Copyright */
-#include <reactos/buildno.h>
-#include <reactos/version.h>
-
-#define NDEBUG
-#include <debug.h>
-
-#include "emulator.h"
-#include "cpu/cpu.h" // for EMULATOR_FLAG_CF
-#include "cpu/bop.h"
-#include "int32.h"
-#include <isvbop.h>
-
-#include <bios/bios.h>
-#include <bios/rom.h>
-#include "bios32.h"
-#include "bios32p.h"
-#include "dskbios32.h"
-#include "kbdbios32.h"
-#include "vidbios32.h"
-#include "moubios32.h"
-
-#include "memory.h"
-#include "io.h"
-#include "hardware/cmos.h"
-#include "hardware/pic.h"
-#include "hardware/pit.h"
-#include "hardware/ps2.h"
-
-/* PRIVATE VARIABLES **********************************************************/
-
-CALLBACK16 BiosContext;
-
-/*
-
-Bochs BIOS, see rombios.h
-=========================
-
-// model byte 0xFC = AT
-#define SYS_MODEL_ID 0xFC
-#define SYS_SUBMODEL_ID 0x00
-#define BIOS_REVISION 1
-#define BIOS_CONFIG_TABLE 0xe6f5
-
-#ifndef BIOS_BUILD_DATE
-# define BIOS_BUILD_DATE "06/23/99"
-#endif
-
-// 1K of base memory used for Extended Bios Data Area (EBDA)
-// EBDA is used for PS/2 mouse support, and IDE BIOS, etc.
-#define EBDA_SEG 0x9FC0
-#define EBDA_SIZE 1 // In KiB
-#define BASE_MEM_IN_K (640 - EBDA_SIZE)
-
-
-See rombios.c
-=============
-
-ROM BIOS compatibility entry points:
-===================================
-$e05b ; POST Entry Point
-$e2c3 ; NMI Handler Entry Point
-$e3fe ; INT 13h Fixed Disk Services Entry Point
-$e401 ; Fixed Disk Parameter Table
-$e6f2 ; INT 19h Boot Load Service Entry Point
-$e6f5 ; Configuration Data Table
-$e729 ; Baud Rate Generator Table
-$e739 ; INT 14h Serial Communications Service Entry Point
-$e82e ; INT 16h Keyboard Service Entry Point
-$e987 ; INT 09h Keyboard Service Entry Point
-$ec59 ; INT 13h Diskette Service Entry Point
-$ef57 ; INT 0Eh Diskette Hardware ISR Entry Point
-$efc7 ; Diskette Controller Parameter Table
-$efd2 ; INT 17h Printer Service Entry Point
-$f045 ; INT 10 Functions 0-Fh Entry Point
-$f065 ; INT 10h Video Support Service Entry Point
-$f0a4 ; MDA/CGA Video Parameter Table (INT 1Dh)
-$f841 ; INT 12h Memory Size Service Entry Point
-$f84d ; INT 11h Equipment List Service Entry Point
-$f859 ; INT 15h System Services Entry Point
-$fa6e ; Character Font for 320x200 & 640x200 Graphics (lower 128 characters)
-$fe6e ; INT 1Ah Time-of-day Service Entry Point
-$fea5 ; INT 08h System Timer ISR Entry Point
-$fef3 ; Initial Interrupt Vector Offsets Loaded by POST
-$ff53 ; IRET Instruction for Dummy Interrupt Handler
-$ff54 ; INT 05h Print Screen Service Entry Point
-$fff0 ; Power-up Entry Point
-$fff5 ; ASCII Date ROM was built - 8 characters in MM/DD/YY
-$fffe ; System Model ID
-
-*/
-
-/*
- * See Ralf Brown: http://www.ctyme.com/intr/rb-1594.htm#Table515
- * for more information.
- */
-#define BIOS_MODEL 0xFC // PC-AT
-#define BIOS_SUBMODEL 0x01 // AT models 319,339 8 MHz, Enh Keyb, 3.5"
-#define BIOS_REVISION 0x00
-// FIXME: Find a nice PS/2 486 + 487 BIOS combination!
-
-static const BIOS_CONFIG_TABLE BiosConfigTable =
-{
- sizeof(BIOS_CONFIG_TABLE) - sizeof(((BIOS_CONFIG_TABLE*)0)->Length), // Length: Number of bytes following
-
- BIOS_MODEL, // BIOS Model
- BIOS_SUBMODEL, // BIOS Sub-Model
- BIOS_REVISION, // BIOS Revision
-
- // Feature bytes
- {
- 0x78, // At the moment we don't have any Extended BIOS Area; see http://www.ctyme.com/intr/rb-1594.htm#Table510
- 0x00, // We don't support anything from here; see http://www.ctyme.com/intr/rb-1594.htm#Table511
- 0x10, // Bit 4: POST supports ROM-to-RAM enable/disable
- 0x00,
- 0x00
- }
-};
-
-
-/*
- * WARNING! For compatibility purposes the string "IBM" should be at F000:E00E .
- * Some programs otherwise look for "COPR. IBM" at F000:E008 .
- */
-static const CHAR BiosCopyright[] = "0000000 NTVDM IBM COMPATIBLE 486 BIOS COPYRIGHT (C) ReactOS Team 1996-"COPYRIGHT_YEAR;
-static const CHAR BiosVersion[] = "ReactOS NTVDM 32-bit BIOS Version "KERNEL_VERSION_STR"\0"
- "BIOS32 Version "KERNEL_VERSION_STR" (Build "KERNEL_VERSION_BUILD_STR")";
-static const CHAR BiosDate[] = "06/17/13";
-
-C_ASSERT(sizeof(BiosCopyright)-1 <= 0x5B); // Ensures that we won't overflow on the POST Code starting at F000:E05B
-C_ASSERT(sizeof(BiosDate)-1 == 0x08);
-
-/* 16-bit bootstrap code at F000:FFF0 */
-static const BYTE Bootstrap[] =
-{
- 0xEA, // jmp far ptr
- 0x5B, 0xE0, 0x00, 0xF0, // F000:E05B
-};
-
-/*
- * POST code at F000:E05B. All the POST is done in 32 bit
- * and only at the end it calls the bootstrap interrupt.
- */
-static const BYTE PostCode[] =
-{
- LOBYTE(EMULATOR_BOP), HIBYTE(EMULATOR_BOP), BOP_RESET, // Call BIOS POST
- 0xCD, BIOS_BOOTSTRAP_LOADER, // INT 0x19
- 0xCD, BIOS_ROM_BASIC, // INT 0x18
- LOBYTE(EMULATOR_BOP), HIBYTE(EMULATOR_BOP), BOP_UNSIMULATE
-};
-
-
-/* PRIVATE FUNCTIONS **********************************************************/
-
-static VOID BiosCharPrint(CHAR Character)
-{
- /* Save AX and BX */
- USHORT AX = getAX();
- USHORT BX = getBX();
-
- /*
- * Set the parameters:
- * AL contains the character to print,
- * BL contains the character attribute,
- * BH contains the video page to use.
- */
- setAL(Character);
- setBL(DEFAULT_ATTRIBUTE);
- setBH(Bda->VideoPage);
-
- /* Call the BIOS INT 10h, AH=0Eh "Teletype Output" */
- setAH(0x0E);
- Int32Call(&BiosContext, BIOS_VIDEO_INTERRUPT);
-
- /* Restore AX and BX */
- setBX(BX);
- setAX(AX);
-}
-
-static VOID WINAPI BiosException(LPWORD Stack)
-{
- /* Get the exception number and call the emulator API */
- BYTE ExceptionNumber = LOBYTE(Stack[STACK_INT_NUM]);
- EmulatorException(ExceptionNumber, Stack);
-}
-
-VOID WINAPI BiosEquipmentService(LPWORD Stack)
-{
- /* Return the equipment list */
- setAX(Bda->EquipmentList);
-}
-
-VOID WINAPI BiosGetMemorySize(LPWORD Stack)
-{
- /* Return the conventional memory size in kB, typically 640 kB */
- setAX(Bda->MemorySize);
-}
-
-static VOID WINAPI BiosMiscService(LPWORD Stack)
-{
- switch (getAH())
- {
- /* OS Hooks for Multitasking */
- case 0x80: // Device Open
- case 0x81: // Device Close
- case 0x82: // Program Termination
- case 0x90: // Device Busy
- case 0x91: // Device POST
- {
- /* Return success by default */
- setAH(0x00);
- Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
- break;
- }
-
- /* Wait on External Event */
- case 0x41:
- {
- BYTE Value;
- BOOLEAN Return;
- static DWORD StartingCount;
-
- /* Check if this is the first time this BOP occurred */
- if (!getCF())
- {
- /* Set the starting count */
- StartingCount = Bda->TickCounter;
- }
-
- if (getBL() != 0 && (Bda->TickCounter - StartingCount) >= getBL())
- {
- /* Timeout expired */
- setCF(0);
- break;
- }
-
- if (getAL() & (1 << 4))
- {
- /* Read from the I/O port */
- Value = IOReadB(getDX());
- }
- else
- {
- /* Read from the memory */
- Value = *(LPBYTE)SEG_OFF_TO_PTR(getES(), getDI());
- }
-
- switch (getAL() & 7)
- {
- /* Any external event */
- case 0:
- {
- /* Return if this is not the first time the BOP occurred */
- Return = getCF();
- break;
- }
-
- /* Compare and return if equal */
- case 1:
- {
- Return = Value == getBH();
- break;
- }
-
- /* Compare and return if not equal */
- case 2:
- {
- Return = Value != getBH();
- break;
- }
-
- /* Test and return if not zero */
- case 3:
- {
- Return = (Value & getBH()) != 0;
- break;
- }
-
- /* Test and return if zero */
- case 4:
- {
- Return = (Value & getBH()) == 0;
- break;
- }
-
- default:
- {
- DPRINT1("INT 15h, AH = 41h - Unknown condition type: %u\n", getAL() & 7);
- Return = TRUE;
- break;
- }
- }
-
- /* Repeat the BOP if we shouldn't return */
- setCF(!Return);
- break;
- }
-
- /* Keyboard intercept */
- case 0x4F:
- {
- /* CF should be set but let's just set it again just in case */
- /* Do not modify AL (the hardware scan code), but set CF to continue processing */
- // setCF(1);
- Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
- break;
- }
-
- /* Wait */
- case 0x86:
- {
- /*
- * Interval in microseconds in CX:DX
- * See Ralf Brown: http://www.ctyme.com/intr/rb-1525.htm
- * for more information.
- */
-
- static ULONG CompletionTime = 0;
-
- /* Check if we're already looping */
- if (getCF())
- {
- if (GetTickCount() >= CompletionTime)
- {
- /* Stop looping */
- setCF(0);
-
- /* Clear the CF on the stack too */
- Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
- }
- }
- else
- {
- /* Set the CF on the stack */
- Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
-
- /* Set the completion time and start looping */
- CompletionTime = GetTickCount() + (MAKELONG(getDX(), getCX()) / 1000);
- setCF(1);
- }
-
- break;
- }
-
- /* Copy Extended Memory */
- case 0x87:
- {
- DWORD Count = (DWORD)getCX() * 2;
- PFAST486_GDT_ENTRY Gdt = (PFAST486_GDT_ENTRY)SEG_OFF_TO_PTR(getES(), getSI());
- DWORD SourceBase = Gdt[2].Base + (Gdt[2].BaseMid << 16) + (Gdt[2].BaseHigh << 24);
- DWORD SourceLimit = Gdt[2].Limit + (Gdt[2].LimitHigh << 16);
- DWORD DestBase = Gdt[3].Base + (Gdt[3].BaseMid << 16) + (Gdt[3].BaseHigh << 24);
- DWORD DestLimit = Gdt[3].Limit + (Gdt[3].LimitHigh << 16);
-
- /* Check for flags */
- if (Gdt[2].Granularity) SourceLimit = (SourceLimit << 12) | 0xFFF;
- if (Gdt[3].Granularity) DestLimit = (DestLimit << 12) | 0xFFF;
-
- if ((Count > SourceLimit) || (Count > DestLimit))
- {
- setAX(0x80);
- Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
- break;
- }
-
- /* Copy */
- RtlMoveMemory((PVOID)((ULONG_PTR)BaseAddress + DestBase),
- (PVOID)((ULONG_PTR)BaseAddress + SourceBase),
- Count);
-
- setAX(ERROR_SUCCESS);
- Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
- break;
- }
-
- /* Get Extended Memory Size */
- case 0x88:
- {
- UCHAR Low, High;
-
- /*
- * Return the (usable) extended memory (after 1 MB)
- * size in kB from CMOS.
- */
- IOWriteB(CMOS_ADDRESS_PORT, CMOS_REG_ACTUAL_EXT_MEMORY_LOW | CMOS_DISABLE_NMI);
- Low = IOReadB(CMOS_DATA_PORT);
- IOWriteB(CMOS_ADDRESS_PORT, CMOS_REG_ACTUAL_EXT_MEMORY_HIGH | CMOS_DISABLE_NMI);
- High = IOReadB(CMOS_DATA_PORT);
- setAX(MAKEWORD(Low, High));
-
- /* Clear CF */
- Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
- break;
- }
-
- /* Switch to Protected Mode */
- case 0x89:
- {
- DPRINT1("BIOS INT 15h, AH=89h \"Switch to Protected Mode\" is UNIMPLEMENTED");
-
- Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
- goto Default;
- }
-
- /* Get Configuration */
- case 0xC0:
- {
- /* Return the BIOS ROM Configuration Table address in ES:BX */
- // The BCT is found at F000:E6F5 for 100% compatible BIOSes.
- setES(BIOS_SEGMENT);
- setBX(0xE6F5);
-
- /* Call successful; clear CF */
- setAH(0x00);
- Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
- break;
- }
-
- /* Return Extended-Bios Data-Area Segment Address (PS) */
- case 0xC1:
- {
- /* We do not support EBDA yet */
- UNIMPLEMENTED;
- Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
- goto Default;
- }
-
- /* Pointing Device BIOS Interface (PS) */
- case 0xC2:
- {
- // FIXME: Reenable this call when we understand why
- // our included mouse driver doesn't correctly reeanble
- // mouse reporting!
- // BiosMousePs2Interface(Stack);
- // break;
- goto Default;
- }
-
- /* Get CPU Type and Mask Revision */
- case 0xC9:
- {
- /*
- * We can see this function as a CPUID replacement.
- * See Ralf Brown: http://www.ctyme.com/intr/rb-1613.htm
- * for more information.
- */
-
- /*
- * Fast486 is a 486DX with FPU included,
- * but old enough to not support CPUID.
- */
- setCX(0x0400);
-
- /* Call successful; clear CF */
- setAH(0x00);
- Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
- break;
- }
-
- /* Get System Memory Map */
- case 0xE8:
- {
- if (getAL() == 0x01)
- {
- /* The amount of memory between 1M and 16M, in kilobytes */
- ULONG Above1M = (min(MAX_ADDRESS, 0x01000000) - 0x00100000) >> 10;
-
- /* The amount of memory above 16M, in 64K blocks */
- ULONG Above16M = (MAX_ADDRESS > 0x01000000) ? ((MAX_ADDRESS - 0x01000000) >> 16) : 0;
-
- setAX(Above1M);
- setBX(Above16M);
- setCX(Above1M);
- setDX(Above16M);
-
- Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
- }
- else if (getAL() == 0x20 && getEDX() == 'SMAP')
- {
- ULONG Offset = getEBX();
- ULONG Length;
- ULONG BytesWritten = 0;
- BOOLEAN Hooked;
- PBIOS_MEMORY_MAP Map = (PBIOS_MEMORY_MAP)SEG_OFF_TO_PTR(getES(), getDI());
-
- /* Assume the buffer won't be large enough */
- Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
-
- while (BytesWritten < getECX() && (ULONG_PTR)Map < (MAX_ADDRESS - sizeof(BIOS_MEMORY_MAP)))
- {
- /* Let's ask our memory controller */
- if (!MemQueryMemoryZone(Offset, &Length, &Hooked))
- {
- /* No more memory blocks */
- Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
- break;
- }
-
- Map->BaseAddress = (ULONGLONG)Offset;
- Map->Length = (ULONGLONG)Length;
- Map->Type = Hooked ? BIOS_MEMORY_RESERVED : BIOS_MEMORY_AVAILABLE;
-
- /* Go to the next record */
- Map++;
- Offset += Length;
- BytesWritten += sizeof(BIOS_MEMORY_MAP);
- }
-
- setEAX('SMAP');
- setEBX(Offset);
- setECX(BytesWritten);
- }
- else
- {
- DPRINT1("BIOS Function INT 15h, AH = 0xE8 - unexpected AL = %02X, EDX = %08X\n",
- getAL(), getEDX());
- }
-
- break;
- }
-
- default: Default:
- {
- DPRINT1("BIOS Function INT 15h, AH = 0x%02X NOT IMPLEMENTED\n",
- getAH());
-
- /*
- * The original signification of the error code 0x86 is that
- * no PC Cassette is present. The CF is also set in this case.
- * To keep backward compatibility, newer BIOSes use this value
- * to indicate an unimplemented call in INT 15h.
- */
- setAH(0x86);
- Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
- }
- }
-}
-
-static VOID WINAPI BiosRomBasic(LPWORD Stack)
-{
- PrintMessageAnsi(BiosCharPrint, "FATAL: INT18: BOOT FAILURE.");
-
- /* ROM Basic is unsupported, display a message to the user */
- DisplayMessage(L"NTVDM doesn't support ROM Basic. The VDM is closing.");
-
- /* Stop the VDM */
- EmulatorTerminate();
-}
-
-
-extern VOID DosBootsectorInitialize(VOID);
-extern VOID WINAPI BiosDiskService(LPWORD Stack);
-
-static VOID WINAPI BiosBootstrapLoader(LPWORD Stack)
-{
- USHORT BootOrder;
-
- USHORT AX, BX, CX, DX, ES;
- AX = getAX();
- BX = getBX();
- CX = getCX();
- DX = getDX();
- ES = getES();
-
- /*
- * Read the boot sequence order from the CMOS, old behaviour AMI-style.
- *
- * For more information, see:
- * http://www.virtualbox.org/svn/vbox/trunk/src/VBox/Devices/PC/BIOS/orgs.asm
- * http://www.virtualbox.org/svn/vbox/trunk/src/VBox/Devices/PC/BIOS/boot.c
- * http://bochs.sourceforge.net/cgi-bin/lxr/source/iodev/cmos.cc
- * https://web.archive.org/web/20111209041013/http://www-ivs.cs.uni-magdeburg.de/~zbrog/asm/cmos.html
- * http://www.bioscentral.com/misc/cmosmap.htm
- */
- IOWriteB(CMOS_ADDRESS_PORT, CMOS_REG_SYSOP);
- BootOrder = (IOReadB(CMOS_DATA_PORT) & 0x20) >> 5;
-
- /*
- * BootOrder =
- * 0: Hard Disk, then Floppy Disk
- * 1: Floppy Disk, then Hard Disk
- * In all cases, if booting from those devices failed,
- * ROM DOS-32 is started. If it fails, INT 18h is called.
- */
-
- DPRINT("BiosBootstrapLoader (BootOrder = 0x%02X) -->\n", BootOrder);
-
- /*
- * Format of the BootOrder command:
- * 2 bytes. Each half-byte contains the ID of the drive to boot.
- * Currently defined:
- * 0x0: 1st Floppy disk
- * 0x1: 1st Hard disk
- * Other, or 0xF: Stop boot sequence.
- */
- BootOrder = 0xFF00 | ((1 << (4 * BootOrder)) & 0xFF);
-
-Retry:
- switch (BootOrder & 0x0F)
- {
- /* Boot from 1st floppy drive */
- case 0:
- {
- setAH(0x02); // Read sectors
- setAL(0x01); // Number of sectors
- setDH(0x00); // Head 0
- setCH(0x00); // Cylinder 0
- setCL(0x01); // Sector 1
- setDL(0x00); // First diskette drive (used by loader code, so should not be cleared)
- setES(0x0000); // Write data in 0000:7C00
- setBX(0x7C00);
- BiosDiskService(Stack);
- if (!(Stack[STACK_FLAGS] & EMULATOR_FLAG_CF)) goto Quit;
- DPRINT1("An error happened while loading the bootsector from floppy 0, error = %d\n", getAH());
-
- break;
- }
-
- /* Boot from 1st HDD drive */
- case 1:
- {
- setAH(0x02); // Read sectors
- setAL(0x01); // Number of sectors
- setDH(0x00); // Head 0
- setCH(0x00); // Cylinder 0
- setCL(0x01); // Sector 1
- setDL(0x80); // First HDD drive (used by loader code, so should not be cleared)
- setES(0x0000); // Write data in 0000:7C00
- setBX(0x7C00);
- BiosDiskService(Stack);
- if (!(Stack[STACK_FLAGS] & EMULATOR_FLAG_CF)) goto Quit;
- DPRINT1("An error happened while loading the bootsector from HDD 0, error = %d\n", getAH());
-
- break;
- }
-
- default:
- goto StartDos;
- }
-
- /* Go to next drive and invalidate the last half-byte. */
- BootOrder = (BootOrder >> 4) | 0xF000;
- goto Retry;
-
-StartDos:
- /* Clear everything, we are going to load DOS32 */
- setAX(AX);
- setBX(BX);
- setCX(CX);
- setDX(DX);
- setES(ES);
- Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
-
- /* Load our DOS */
- DosBootsectorInitialize();
-
-Quit:
- /*
- * Jump to 0000:7C00 to boot the OS.
- *
- * Since we are called via the INT32 mechanism, we need to correctly set
- * CS:IP, not by changing the current one (otherwise the interrupt could
- * not be clean up and return properly), but by changing the CS:IP in the
- * stack, so that when the interrupt returns, the modified CS:IP is popped
- * off the stack and the CPU is correctly repositioned.
- */
- Stack[STACK_CS] = 0x0000;
- Stack[STACK_IP] = 0x7C00;
-
- DPRINT("<-- BiosBootstrapLoader\n");
-}
-
-static VOID WINAPI BiosTimeService(LPWORD Stack)
-{
- switch (getAH())
- {
- /* Get System Time */
- case 0x00:
- {
- /* Set AL to 1 if midnight had passed, 0 otherwise */
- setAL(Bda->MidnightPassed ? 0x01 : 0x00);
-
- /* Return the tick count in CX:DX */
- setCX(HIWORD(Bda->TickCounter));
- setDX(LOWORD(Bda->TickCounter));
-
- /* Reset the midnight flag */
- Bda->MidnightPassed = FALSE;
-
- break;
- }
-
- /* Set System Time */
- case 0x01:
- {
- /* Set the tick count to CX:DX */
- Bda->TickCounter = MAKELONG(getDX(), getCX());
-
- /* Reset the midnight flag */
- Bda->MidnightPassed = FALSE;
-
- break;
- }
-
- /* Get Real-Time Clock Time */
- case 0x02:
- {
- UCHAR StatusB;
-
- IOWriteB(CMOS_ADDRESS_PORT, CMOS_REG_HOURS);
- setCH(IOReadB(CMOS_DATA_PORT));
-
- IOWriteB(CMOS_ADDRESS_PORT, CMOS_REG_MINUTES);
- setCL(IOReadB(CMOS_DATA_PORT));
-
- IOWriteB(CMOS_ADDRESS_PORT, CMOS_REG_SECONDS);
- setDH(IOReadB(CMOS_DATA_PORT));
-
- /* Daylight Savings Time */
- IOWriteB(CMOS_ADDRESS_PORT, CMOS_REG_STATUS_B);
- StatusB = IOReadB(CMOS_DATA_PORT);
- setDL(StatusB & 0x01);
-
- /* Clear CF */
- Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
- break;
- }
-
- // /* Set Real-Time Clock Time */
- // case 0x03:
- // {
- // break;
- // }
-
- /* Get Real-Time Clock Date */
- case 0x04:
- {
- IOWriteB(CMOS_ADDRESS_PORT, CMOS_REG_CENTURY);
- setCH(IOReadB(CMOS_DATA_PORT));
-
- IOWriteB(CMOS_ADDRESS_PORT, CMOS_REG_YEAR);
- setCL(IOReadB(CMOS_DATA_PORT));
-
- IOWriteB(CMOS_ADDRESS_PORT, CMOS_REG_MONTH);
- setDH(IOReadB(CMOS_DATA_PORT));
-
- IOWriteB(CMOS_ADDRESS_PORT, CMOS_REG_DAY);
- setDL(IOReadB(CMOS_DATA_PORT));
-
- /* Clear CF */
- Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
- break;
- }
-
- // /* Set Real-Time Clock Date */
- // case 0x05:
- // {
- // break;
- // }
-
- default:
- {
- DPRINT1("BIOS Function INT 1Ah, AH = 0x%02X NOT IMPLEMENTED\n",
- getAH());
- }
- }
-}
-
-static VOID WINAPI BiosSystemTimerInterrupt(LPWORD Stack)
-{
- /* Increase the system tick count */
- Bda->TickCounter++;
-}
-
-
-// From SeaBIOS
-static VOID PicSetIRQMask(USHORT off, USHORT on)
-{
- UCHAR pic1off = off, pic1on = on, pic2off = off>>8, pic2on = on>>8;
- IOWriteB(PIC_MASTER_DATA, (IOReadB(PIC_MASTER_DATA) & ~pic1off) | pic1on);
- IOWriteB(PIC_SLAVE_DATA , (IOReadB(PIC_SLAVE_DATA ) & ~pic2off) | pic2on);
-}
-
-// From SeaBIOS
-VOID EnableHwIRQ(UCHAR hwirq, EMULATOR_INT32_PROC func)
-{
- UCHAR vector;
-
- PicSetIRQMask(1 << hwirq, 0);
- if (hwirq < 8)
- vector = BIOS_PIC_MASTER_INT + hwirq;
- else
- vector = BIOS_PIC_SLAVE_INT + hwirq - 8;
-
- RegisterBiosInt32(vector, func);
-}
-
-
-VOID PicIRQComplete(BYTE IntNum)
-{
- /*
- * If this was a PIC IRQ, send an End-of-Interrupt to the PIC.
- */
- if (IntNum >= BIOS_PIC_MASTER_INT && IntNum < BIOS_PIC_MASTER_INT + 8)
- {
- /* It was an IRQ from the master PIC */
- IOWriteB(PIC_MASTER_CMD, PIC_OCW2_EOI);
- }
- else if (IntNum >= BIOS_PIC_SLAVE_INT && IntNum < BIOS_PIC_SLAVE_INT + 8)
- {
- /* It was an IRQ from the slave PIC */
- IOWriteB(PIC_SLAVE_CMD , PIC_OCW2_EOI);
- IOWriteB(PIC_MASTER_CMD, PIC_OCW2_EOI);
- }
-}
-
-static VOID WINAPI BiosHandleMasterPicIRQ(LPWORD Stack)
-{
- BYTE IrqNumber;
-
- IOWriteB(PIC_MASTER_CMD, PIC_OCW3_READ_ISR /* == 0x0B */);
- IrqNumber = IOReadB(PIC_MASTER_CMD);
-
- DPRINT("Master - IrqNumber = 0x%02X\n", IrqNumber);
-
- PicIRQComplete(LOBYTE(Stack[STACK_INT_NUM]));
-}
-
-static VOID WINAPI BiosHandleSlavePicIRQ(LPWORD Stack)
-{
- BYTE IrqNumber;
-
- IOWriteB(PIC_SLAVE_CMD, PIC_OCW3_READ_ISR /* == 0x0B */);
- IrqNumber = IOReadB(PIC_SLAVE_CMD);
-
- DPRINT("Slave - IrqNumber = 0x%02X\n", IrqNumber);
-
- PicIRQComplete(LOBYTE(Stack[STACK_INT_NUM]));
-}
-
-// Timer IRQ 0
-static VOID WINAPI BiosTimerIrq(LPWORD Stack)
-{
- /*
- * Perform the system timer interrupt.
- *
- * Do not call directly BiosSystemTimerInterrupt(Stack);
- * because some programs may hook only BIOS_SYS_TIMER_INTERRUPT
- * for their purpose...
- */
-
- WORD AX = getAX();
- WORD CX = getCX();
- WORD DX = getDX();
- WORD BX = getBX();
- WORD BP = getBP();
- WORD SI = getSI();
- WORD DI = getDI();
- WORD DS = getDS();
- WORD ES = getES();
-
- Int32Call(&BiosContext, BIOS_SYS_TIMER_INTERRUPT);
-
- setAX(AX);
- setCX(CX);
- setDX(DX);
- setBX(BX);
- setBP(BP);
- setSI(SI);
- setDI(DI);
- setDS(DS);
- setES(ES);
- setCF(0);
-
- // BiosSystemTimerInterrupt(Stack);
- PicIRQComplete(LOBYTE(Stack[STACK_INT_NUM]));
-}
-
-
-static VOID BiosHwSetup(VOID)
-{
- /* Initialize the master and the slave PICs (cascade mode) */
- IOWriteB(PIC_MASTER_CMD, PIC_ICW1 | PIC_ICW1_ICW4);
- IOWriteB(PIC_SLAVE_CMD , PIC_ICW1 | PIC_ICW1_ICW4);
-
- /*
- * Set the interrupt vector offsets for each PIC
- * (base IRQs: 0x08-0x0F for IRQ 0-7, 0x70-0x77 for IRQ 8-15)
- */
- IOWriteB(PIC_MASTER_DATA, BIOS_PIC_MASTER_INT);
- IOWriteB(PIC_SLAVE_DATA , BIOS_PIC_SLAVE_INT );
-
- /* Tell the master PIC that there is a slave PIC at IRQ 2 */
- IOWriteB(PIC_MASTER_DATA, 1 << 2);
- /* Tell the slave PIC its cascade identity */
- IOWriteB(PIC_SLAVE_DATA , 2);
-
- /* Make sure both PICs are in 8086 mode */
- IOWriteB(PIC_MASTER_DATA, PIC_ICW4_8086);
- IOWriteB(PIC_SLAVE_DATA , PIC_ICW4_8086);
-
- /* Clear the masks for both PICs */
- // IOWriteB(PIC_MASTER_DATA, 0x00);
- // IOWriteB(PIC_SLAVE_DATA , 0x00);
- /* Disable all IRQs */
- IOWriteB(PIC_MASTER_DATA, 0xFF);
- IOWriteB(PIC_SLAVE_DATA , 0xFF);
-
-
- /* Initialize PIT Counter 0 - Mode 2, 16bit binary count */
- // NOTE: Some BIOSes set it to Mode 3 instead.
- IOWriteB(PIT_COMMAND_PORT, 0x34);
- // 18.2Hz refresh rate
- IOWriteB(PIT_DATA_PORT(0), 0x00);
- IOWriteB(PIT_DATA_PORT(0), 0x00);
-
- /* Initialize PIT Counter 1 - Mode 2, 8bit binary count */
- IOWriteB(PIT_COMMAND_PORT, 0x54);
- // DRAM refresh every 15ms: http://www.cs.dartmouth.edu/~spl/Academic/Organization/docs/PC%20Timer%208253.html
- IOWriteB(PIT_DATA_PORT(1), 18);
-
- /* Initialize PIT Counter 2 - Mode 3, 16bit binary count */
- IOWriteB(PIT_COMMAND_PORT, 0xB6);
- // Count for 440Hz
- IOWriteB(PIT_DATA_PORT(2), 0x97);
- IOWriteB(PIT_DATA_PORT(2), 0x0A);
-
-
- /* Initialize PS/2 keyboard port */
- // Enable the port
- IOWriteB(PS2_CONTROL_PORT, 0xAE);
- // Port interrupts and clock enabled,
- // enable keyboard scancode translation.
- // POST passed, force keyboard unlocking.
- IOWriteB(PS2_CONTROL_PORT, 0x60);
- IOWriteB(PS2_DATA_PORT , 0x6D);
- // Enable data reporting
- IOWriteB(PS2_DATA_PORT , 0xF4);
-
- EnableHwIRQ(0, BiosTimerIrq);
-}
-
-static VOID InitializeBiosInt32(VOID)
-{
- USHORT i;
-
- /* Initialize the callback context */
- InitializeContext(&BiosContext, BIOS_SEGMENT, 0x0000);
-
- /* Register the default BIOS interrupt vectors */
-
- /*
- * Zero out all of the IVT (0x00 -- 0xFF). Some applications
- * indeed expect to have free vectors at the end of the IVT.
- */
- RtlZeroMemory(BaseAddress, 0x0100 * sizeof(ULONG));
-
-#if defined(ADVANCED_DEBUGGING) && (ADVANCED_DEBUGGING_LEVEL >= 3)
- // Initialize all the interrupt vectors to the default one.
- for (i = 0x00; i <= 0xFF; i++)
- RegisterBiosInt32(i, NULL);
-#endif
-
- /* Initialize the exception interrupt vectors to a default Exception handler */
- for (i = 0x00; i <= 0x07; i++)
- RegisterBiosInt32(i, BiosException);
-
- /* Initialize HW interrupt vectors to a default HW handler */
- for (i = BIOS_PIC_MASTER_INT; i < BIOS_PIC_MASTER_INT + 8; i++) // 0x08 -- 0x0F
- RegisterBiosInt32(i, BiosHandleMasterPicIRQ);
- for (i = BIOS_PIC_SLAVE_INT ; i < BIOS_PIC_SLAVE_INT + 8; i++) // 0x70 -- 0x77
- RegisterBiosInt32(i, BiosHandleSlavePicIRQ);
-
- /* Initialize software vector handlers */
- // BIOS_VIDEO_INTERRUPT : 0x10 (vidbios32.c)
- RegisterBiosInt32(BIOS_EQUIPMENT_INTERRUPT, BiosEquipmentService );
- RegisterBiosInt32(BIOS_MEMORY_SIZE , BiosGetMemorySize );
- // BIOS_DISK_INTERRUPT : 0x13 (dskbios32.c)
- // BIOS_SERIAL_INTERRUPT : 0x14 -- UNIMPLEMENTED
- RegisterBiosInt32(BIOS_MISC_INTERRUPT , BiosMiscService );
- // BIOS_KBD_INTERRUPT : 0x16 (kbdbios32.c)
- // BIOS_PRINTER_INTERRUPT: 0x17 -- UNIMPLEMENTED
- RegisterBiosInt32(BIOS_ROM_BASIC , BiosRomBasic );
- RegisterBiosInt32(BIOS_BOOTSTRAP_LOADER , BiosBootstrapLoader );
- RegisterBiosInt32(BIOS_TIME_INTERRUPT , BiosTimeService );
- // BIOS_KBD_CTRL_BREAK_INTERRUPT: 0x1B -- UNIMPLEMENTED
- RegisterBiosInt32(BIOS_SYS_TIMER_INTERRUPT, BiosSystemTimerInterrupt);
-
- /* Vectors that should be implemented (see above) */
- RegisterBiosInt32(0x14, NULL);
- RegisterBiosInt32(0x17, NULL);
- RegisterBiosInt32(0x1B, NULL);
- RegisterBiosInt32(0x4A, NULL); // User Alarm Handler
-
- /* Relocated services by the BIOS (when needed) */
- RegisterBiosInt32(0x40, NULL); // ROM BIOS Diskette Handler relocated by Hard Disk BIOS
- RegisterBiosInt32(0x42, NULL); // Relocated Default INT 10h Video Services
-
- /* Miscellaneous unimplemented vector handlers that should better have a default one */
- RegisterBiosInt32(0x4B, NULL); // Virtual DMA Specification Services
- RegisterBiosInt32(0x5C, NULL); // NetBIOS
-
- // ROM-BASIC interrupts span from 0x80 up to 0xEF.
- // They don't have any default handler at the moment.
-
- /* Some vectors are in fact addresses to tables */
- ((PULONG)BaseAddress)[0x1D] = (ULONG)NULL; // Video Parameter Tables
- ((PULONG)BaseAddress)[0x1E] = (ULONG)NULL; // Diskette Parameters
- ((PULONG)BaseAddress)[0x1F] = (ULONG)NULL; // 8x8 Graphics Font
- ((PULONG)BaseAddress)[0x41] = (ULONG)NULL; // Hard Disk 0 Parameter Table Address
- ((PULONG)BaseAddress)[0x43] = (ULONG)NULL; // Character Table (EGA, MCGA, VGA)
- ((PULONG)BaseAddress)[0x46] = (ULONG)NULL; // Hard Disk 1 Drive Parameter Table Address
- /* Tables that are always uninitialized */
- ((PULONG)BaseAddress)[0x44] = (ULONG)NULL; // ROM BIOS Character Font, Characters 00h-7Fh (PCjr)
- ((PULONG)BaseAddress)[0x48] = (ULONG)NULL; // Cordless Keyboard Translation (PCjr)
- ((PULONG)BaseAddress)[0x49] = (ULONG)NULL; // Non-Keyboard Scan-code Translation Table (PCJr)
-}
-
-static VOID InitializeBiosData(VOID)
-{
- UCHAR Low, High;
-
- /* Initialize the BDA contents */
- RtlZeroMemory(Bda, sizeof(*Bda));
-
- /*
- * Retrieve the basic equipment list from the CMOS
- */
- IOWriteB(CMOS_ADDRESS_PORT, CMOS_REG_EQUIPMENT_LIST | CMOS_DISABLE_NMI);
- Bda->EquipmentList = IOReadB(CMOS_DATA_PORT);
- // TODO: Update it if required.
- Bda->EquipmentList &= 0x00FF; // High byte cleared for now...
-
- /*
- * Retrieve the conventional memory size
- * in kB from the CMOS, typically 640 kB.
- */
- IOWriteB(CMOS_ADDRESS_PORT, CMOS_REG_BASE_MEMORY_LOW | CMOS_DISABLE_NMI);
- Low = IOReadB(CMOS_DATA_PORT);
- IOWriteB(CMOS_ADDRESS_PORT, CMOS_REG_BASE_MEMORY_HIGH | CMOS_DISABLE_NMI);
- High = IOReadB(CMOS_DATA_PORT);
- Bda->MemorySize = MAKEWORD(Low, High);
-}
-
-
-/*
- * The BIOS POST (Power On-Self Test)
- */
-/*static*/ VOID
-WINAPI
-Bios32Post(LPWORD Stack)
-{
- static BOOLEAN FirstBoot = TRUE;
- BYTE ShutdownStatus;
-
- /*
- * Initialize BIOS/Keyboard/Video RAM dynamic data
- */
-
- DPRINT("Bios32Post\n");
-
- /* Disable interrupts */
- setIF(0);
-
- /* Set the data segment */
- setDS(BDA_SEGMENT);
-
- /* Initialize the stack */
- // Temporary stack for POST (to be used only before initializing the INT vectors)
- // setSS(0x0000);
- // setSP(0x0400);
- //
- // Stack to be used after the initialization of the INT vectors
- setSS(0x0000); // Stack at 00:8000, going downwards
- setSP(0x8000);
-
- /*
- * Perform early CMOS shutdown status checks
- */
-
- /* Read the CMOS shutdown status byte and reset it */
- IOWriteB(CMOS_ADDRESS_PORT, CMOS_REG_SHUTDOWN_STATUS | CMOS_DISABLE_NMI);
- ShutdownStatus = IOReadB(CMOS_DATA_PORT);
- IOWriteB(CMOS_ADDRESS_PORT, CMOS_REG_SHUTDOWN_STATUS | CMOS_DISABLE_NMI);
- IOWriteB(CMOS_DATA_PORT, 0x00);
-
- DPRINT1("Bda->SoftReset = 0x%04X ; ShutdownStatus = 0x%02X\n",
- Bda->SoftReset, ShutdownStatus);
-
- switch (ShutdownStatus)
- {
- /* Shutdown after Memory Tests (unsupported) */
- case 0x01: case 0x02: case 0x03:
- /* Shutdown after Protected Mode Tests (unsupported) */
- case 0x06: case 0x07: case 0x08:
- /* Shutdown after Block Move Test (unsupported) */
- case 0x09:
- {
- DisplayMessage(L"Unsupported CMOS Shutdown Status value 0x%02X. The VDM will shut down.", ShutdownStatus);
- EmulatorTerminate();
- return;
- }
-
- /* Shutdown to Boot Loader */
- case 0x04:
- {
- DPRINT1("Fast restart to Bootstrap Loader...\n");
- goto Quit; // Reenable interrupts and exit.
- }
-
- /* Flush keyboard, issue an EOI... */
- case 0x05:
- {
- IOReadB(PS2_DATA_PORT);
-
- /* Send EOI */
- IOWriteB(PIC_SLAVE_CMD , PIC_OCW2_EOI);
- IOWriteB(PIC_MASTER_CMD, PIC_OCW2_EOI);
-
- // Fall back
- }
-
- /*
- * ... and far JMP to user-specified location at 0040:0067
- * (Bda->ResumeEntryPoint) with interrupts and NMI disabled.
- */
- case 0x0A:
- {
- DPRINT1("Bda->ResumeEntryPoint = %04X:%04X\n",
- HIWORD(Bda->ResumeEntryPoint),
- LOWORD(Bda->ResumeEntryPoint));
-
- /* Position execution pointers and return with interrupts disabled */
- setCS(HIWORD(Bda->ResumeEntryPoint));
- setIP(LOWORD(Bda->ResumeEntryPoint));
- return;
- }
-
- /* Soft reset or unexpected shutdown... */
- case 0x00:
- /* ... or other possible shutdown codes: just continue the POST */
- default:
- break;
- }
-
- /*
- * FIXME: UNIMPLEMENTED!
- * Check the word at 0040h:0072h (Bda->SoftReset) and do one of the
- * following actions:
- * - if the word is 0000h, perform a cold reboot (aka. Reset). Everything gets initialized.
- * - if the word is 1234h, perform a warm reboot (aka. Ctrl-Alt-Del). Some stuff is skipped.
- */
- switch (Bda->SoftReset)
- {
- case 0x0000:
- {
- if (!FirstBoot)
- {
- DisplayMessage(L"NTVDM is performing a COLD reboot! The program you are currently testing does not seem to behave correctly! The VDM will shut down...");
- EmulatorTerminate();
- return;
- }
- break;
- }
-
- case 0x1234:
- {
- DisplayMessage(L"NTVDM is performing a WARM reboot! This is not supported at the moment. The VDM will shut down...");
- EmulatorTerminate();
- return;
- }
-
- default:
- break;
- }
-
- FirstBoot = FALSE;
-
- /* Initialize the BDA */
- InitializeBiosData();
-
- /* Initialize the User Data Area at 0050:XXXX */
- RtlZeroMemory(SEG_OFF_TO_PTR(0x50, 0x0000), sizeof(USER_DATA_AREA));
-
-
-
- //////// NOTE: This is more or less bios-specific ////////
-
- /*
- * Initialize IVT and hardware
- */
-
- // WriteUnProtectRom(...);
-
- /* Register the BIOS 32-bit Interrupts */
- InitializeBiosInt32();
-
- /* Initialize platform hardware (PIC/PIT chips, ...) */
- BiosHwSetup();
-
- /* Initialize the Keyboard, Video and Mouse BIOS */
- KbdBios32Post();
- VidBiosPost();
- MouseBios32Post();
- DiskBios32Post();
-
- // WriteProtectRom(...);
-
- //////// End of more or less bios-specific section ///////
-
-
-
- SearchAndInitRoms(&BiosContext);
-
- /*
- * End of the 32-bit POST portion. We then fall back into 16-bit where
- * the rest of the POST code is executed, typically calling INT 19h
- * to boot up the OS.
- */
-
-Quit:
- /* Enable interrupts */
- setIF(1);
-}
-
-
-/* PUBLIC FUNCTIONS ***********************************************************/
-
-BOOLEAN Bios32Initialize(VOID)
-{
- /*
- * Initialize BIOS/Keyboard/Video ROM static data
- */
-
- /* System BIOS Copyright */
- RtlCopyMemory(SEG_OFF_TO_PTR(BIOS_SEGMENT, 0xE000), BiosCopyright, sizeof(BiosCopyright)-1);
-
- /* System BIOS Version */
- RtlCopyMemory(SEG_OFF_TO_PTR(BIOS_SEGMENT, 0xE070), BiosVersion, sizeof(BiosVersion)-1);
-
- /* System BIOS Date */
- RtlCopyMemory(SEG_OFF_TO_PTR(BIOS_SEGMENT, 0xFFF5), BiosDate, sizeof(BiosDate)-1);
-
- /* Bootstrap code */
- RtlCopyMemory(SEG_OFF_TO_PTR(BIOS_SEGMENT, 0xE05B), PostCode , sizeof(PostCode ));
- RtlCopyMemory(SEG_OFF_TO_PTR(BIOS_SEGMENT, 0xFFF0), Bootstrap, sizeof(Bootstrap));
-
- /* BIOS ROM Information */
- RtlCopyMemory(SEG_OFF_TO_PTR(BIOS_SEGMENT, 0xE6F5), &BiosConfigTable, sizeof(BiosConfigTable));
-
- /* System BIOS Model (same as Bct->Model) */
- *(PBYTE)(SEG_OFF_TO_PTR(BIOS_SEGMENT, 0xFFFE)) = BIOS_MODEL;
-
- /* Initialize the Keyboard and Video BIOS */
- if (!KbdBiosInitialize() || !VidBiosInitialize() || !MouseBiosInitialize() || !DiskBios32Initialize())
- {
- /* Stop the VDM */
- EmulatorTerminate();
- return FALSE;
- }
-
- /* Redefine our POST function */
- RegisterBop(BOP_RESET, Bios32Post);
-
- WriteProtectRom((PVOID)TO_LINEAR(BIOS_SEGMENT, 0x0000),
- ROM_AREA_END - TO_LINEAR(BIOS_SEGMENT, 0x0000) + 1);
-
- /* We are done */
- return TRUE;
-}
-
-VOID Bios32Cleanup(VOID)
-{
- DiskBios32Cleanup();
- MouseBios32Cleanup();
- VidBios32Cleanup();
- KbdBiosCleanup();
-}
-
-/* EOF */
projects / reactos.git / blobdiff