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[FREELDR]

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- copy ebp into REGS structure on Int386
- Write pointer and size of extended bios data area in physical page 0 location 0x740 and pointers to vga rom fonts in location 0x700. This is required by windows 2003's videoprt. Now freeldr is more Windows 2003 ready then ever!

svn path=/trunk/; revision=53876
This commit is contained in:
Timo Kreuzer 2011-09-27 20:25:51 +00:00
parent 5bfa5255bf
commit bf557a26c1
2 changed files with 76 additions and 0 deletions
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74
reactos/boot/freeldr/freeldr/arch/i386/winldr.c
View file

@ -279,6 +279,77 @@ WinLdrMapSpecialPages(void)
return TRUE;
}
#define ExtendedBIOSDataArea ((PULONG)0x740)
#define ExtendedBIOSDataSize ((PULONG)0x744)
#define RomFontPointers ((PULONG)0x700)
enum
{
INT1FhFont = 0x00,
INT43hFont = 0x01,
ROM_8x14CharacterFont = 0x02,
ROM_8x8DoubleDotFontLo = 0x03,
ROM_8x8DoubleDotFontHi = 0x04,
ROM_AlphaAlternate = 0x05,
ROM_8x16Font = 0x06,
ROM_Alternate9x16Font = 0x07,
UltraVision_8x20Font = 0x11,
UltraVision_8x10Font = 0x12,
};
void WinLdrSetupSpecialDataPointers()
{
REGS BiosRegs;
/* Get the address of the bios rom fonts. Win 2003 videoprt reads these
values from address 0x700 .. 0x718 and store them in the registry
in HKLM\System\CurrentControlSet\Control\Wow\RomFontPointers
Int 10h, AX=1130h, BH = pointer specifier
returns: es:bp = address */
BiosRegs.d.eax = 0x1130;
BiosRegs.b.bh = ROM_8x14CharacterFont;
Int386(0x10, &BiosRegs, &BiosRegs);
RomFontPointers[0] = BiosRegs.w.es << 4 | BiosRegs.w.bp;
BiosRegs.b.bh = ROM_8x8DoubleDotFontLo;
Int386(0x10, &BiosRegs, &BiosRegs);
RomFontPointers[1] = BiosRegs.w.es << 16 | BiosRegs.w.bp;
BiosRegs.b.bh = ROM_8x8DoubleDotFontHi;
Int386(0x10, &BiosRegs, &BiosRegs);
RomFontPointers[2] = BiosRegs.w.es << 16 | BiosRegs.w.bp;
BiosRegs.b.bh = ROM_AlphaAlternate;
Int386(0x10, &BiosRegs, &BiosRegs);
RomFontPointers[3] = BiosRegs.w.es << 16 | BiosRegs.w.bp;
BiosRegs.b.bh = ROM_8x16Font;
Int386(0x10, &BiosRegs, &BiosRegs);
RomFontPointers[4] = BiosRegs.w.es << 16 | BiosRegs.w.bp;
BiosRegs.b.bh = ROM_Alternate9x16Font;
Int386(0x10, &BiosRegs, &BiosRegs);
RomFontPointers[5] = BiosRegs.w.es << 16 | BiosRegs.w.bp;
/* Store address of the extended bios data area in 0x740 */
BiosRegs.d.eax = 0xC100;
Int386(0x15, &BiosRegs, &BiosRegs);
if (INT386_SUCCESS(BiosRegs))
{
*ExtendedBIOSDataArea = BiosRegs.w.es << 4;
*ExtendedBIOSDataSize = 1024;
ERR(">> *ExtendedBIOSDataArea = 0x%lx\n", *ExtendedBIOSDataArea);
}
else
{
ERR("Couldn't get address of extended BIOS data area\n");
*ExtendedBIOSDataArea = 0;
*ExtendedBIOSDataSize = 0;
}
/* Store size of the extended bios data area in 0x740 */
}
void WinLdrSetupMachineDependent(PLOADER_PARAMETER_BLOCK LoaderBlock)
{
ULONG TssSize;
@ -331,6 +402,9 @@ void WinLdrSetupMachineDependent(PLOADER_PARAMETER_BLOCK LoaderBlock)
/* Map stuff like PCR, KI_USER_SHARED_DATA and Apic */
WinLdrMapSpecialPages();
/* Set some special fields */
WinLdrSetupSpecialDataPointers();
}

2
reactos/boot/freeldr/freeldr/arch/realmode/int386.inc
View file

@ -29,6 +29,7 @@ Int386:
mov edx, dword ptr cs:[BSS_RegisterSet + REGS_EDX]
mov esi, dword ptr cs:[BSS_RegisterSet + REGS_ESI]
mov edi, dword ptr cs:[BSS_RegisterSet + REGS_EDI]
mov ebp, dword ptr cs:[BSS_RegisterSet + REGS_EBP]
/* Do not set the flags register */
/* only return its value in regsout */
@ -46,6 +47,7 @@ Int386_vector_opcode:
mov dword ptr cs:[BSS_RegisterSet + REGS_EDX], edx
mov dword ptr cs:[BSS_RegisterSet + REGS_ESI], esi
mov dword ptr cs:[BSS_RegisterSet + REGS_EDI], edi
mov dword ptr cs:[BSS_RegisterSet + REGS_EBP], ebp
mov ax, ds
mov word ptr cs:[BSS_RegisterSet + REGS_DS], ax