diff options
Diffstat (limited to 'board/MAI/bios_emulator/scitech/src/pm/common/_mtrr.asm')
| -rw-r--r-- | board/MAI/bios_emulator/scitech/src/pm/common/_mtrr.asm | 272 |
1 files changed, 0 insertions, 272 deletions
diff --git a/board/MAI/bios_emulator/scitech/src/pm/common/_mtrr.asm b/board/MAI/bios_emulator/scitech/src/pm/common/_mtrr.asm deleted file mode 100644 index 1e0a6966ce..0000000000 --- a/board/MAI/bios_emulator/scitech/src/pm/common/_mtrr.asm +++ /dev/null @@ -1,272 +0,0 @@ -;**************************************************************************** -;* -;* SciTech OS Portability Manager Library -;* -;* ======================================================================== -;* -;* The contents of this file are subject to the SciTech MGL Public -;* License Version 1.0 (the "License"); you may not use this file -;* except in compliance with the License. You may obtain a copy of -;* the License at http://www.scitechsoft.com/mgl-license.txt -;* -;* Software distributed under the License is distributed on an -;* "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or -;* implied. See the License for the specific language governing -;* rights and limitations under the License. -;* -;* The Original Code is Copyright (C) 1991-1998 SciTech Software, Inc. -;* -;* The Initial Developer of the Original Code is SciTech Software, Inc. -;* All Rights Reserved. -;* -;* ======================================================================== -;* -;* Language: 80386 Assembler, TASM 4.0 or NASM -;* Environment: 16/32 bit Ring 0 device driver -;* -;* Description: Assembler support routines for the Memory Type Range Register -;* (MTRR) module. -;* -;**************************************************************************** - - IDEAL - -include "scitech.mac" ; Memory model macros - -header _mtrr ; Set up memory model - -begdataseg _mtrr - -ifdef DOS4GW - cextern _PM_haveCauseWay,UINT -endif - -enddataseg _mtrr - -begcodeseg _mtrr ; Start of code segment - -P586 - -;---------------------------------------------------------------------------- -; ibool _MTRR_isRing0(void); -;---------------------------------------------------------------------------- -; Checks to see if we are running at ring 0. This check is only relevant -; for 32-bit DOS4GW and compatible programs. If we are not running under -; DOS4GW, then we simply assume we are a ring 0 device driver. -;---------------------------------------------------------------------------- -cprocnear _MTRR_isRing0 - -; Are we running under CauseWay? - -ifdef DOS4GW - enter_c - mov ax,cs - and eax,3 - xor eax,3 - jnz @@Exit - -; CauseWay runs the apps at ring 3, but implements support for specific -; ring 0 instructions that we need to get stuff done under real DOS. - - mov eax,1 - cmp [UINT _PM_haveCauseWay],0 - jnz @@Exit -@@Fail: xor eax,eax -@@Exit: leave_c - ret -else -ifdef __SMX32__ - mov eax,1 ; SMX is ring 0! - ret -else -ifdef __VXD__ - mov eax,1 ; VxD is ring 0! - ret -else -ifdef __NT_DRIVER__ - mov eax,1 ; NT/W2K is ring 0! - ret -else -else - xor eax,eax ; Assume ring 3 for 32-bit DOS - ret -endif -endif -endif -endif - -cprocend - -;---------------------------------------------------------------------------- -; ulong _MTRR_disableInt(void); -;---------------------------------------------------------------------------- -; Return processor interrupt status and disable interrupts. -;---------------------------------------------------------------------------- -cprocstart _MTRR_disableInt - - pushfd ; Put flag word on stack - cli ; Disable interrupts! - pop eax ; deposit flag word in return register - ret - -cprocend - -;---------------------------------------------------------------------------- -; void _MTRR_restoreInt(ulong ps); -;---------------------------------------------------------------------------- -; Restore processor interrupt status. -;---------------------------------------------------------------------------- -cprocstart _MTRR_restoreInt - - ARG ps:ULONG - - push ebp - mov ebp,esp ; Set up stack frame - mov ecx,[ps] - test ecx,200h ; SMP safe interrupt flag restore! - jz @@1 - sti -@@1: pop ebp - ret - -cprocend - -;---------------------------------------------------------------------------- -; ulong _MTRR_saveCR4(void); -;---------------------------------------------------------------------------- -; Save the value of CR4 and clear the Page Global Enable (bit 7). We also -; disable and flush the caches. -;---------------------------------------------------------------------------- -cprocstart _MTRR_saveCR4 - - enter_c - -; Save value of CR4 and clear Page Global Enable (bit 7) - - mov ebx,cr4 - mov eax,ebx - and al,7Fh - mov cr4,eax - -; Disable and flush caches - - mov eax,cr0 - or eax,40000000h - wbinvd - mov cr0,eax - wbinvd - -; Return value from CR4 - - mov eax,ebx - leave_c - ret - -cprocend - -;---------------------------------------------------------------------------- -; void _MTRR_restoreCR4(ulong cr4Val) -;---------------------------------------------------------------------------- -; Save the value of CR4 and clear the Page Global Enable (bit 7). We also -; disable and flush the caches. -;---------------------------------------------------------------------------- -cprocstart _MTRR_restoreCR4 - - ARG cr4Val:ULONG - - enter_c - -; Enable caches - - mov eax,cr0 - and eax,0BFFFFFFFh - mov cr0,eax - mov eax,[cr4Val] - mov cr4,eax - leave_c - ret - -cprocend - -;---------------------------------------------------------------------------- -; uchar _MTRR_getCx86(uchar reg); -;---------------------------------------------------------------------------- -; Read a Cyrix CPU indexed register -;---------------------------------------------------------------------------- -cprocstart _MTRR_getCx86 - - ARG reg:UCHAR - - enter_c - mov al,[reg] - out 22h,al - in al,23h - leave_c - ret - -cprocend - -;---------------------------------------------------------------------------- -; uchar _MTRR_setCx86(uchar reg,uchar val); -;---------------------------------------------------------------------------- -; Write a Cyrix CPU indexed register -;---------------------------------------------------------------------------- -cprocstart _MTRR_setCx86 - - ARG reg:UCHAR, val:UCHAR - - enter_c - mov al,[reg] - out 22h,al - mov al,[val] - out 23h,al - leave_c - ret - -cprocend - -;---------------------------------------------------------------------------- -; void _MTRR_readMSR(uong reg, ulong FAR *eax, ulong FAR *edx); -;---------------------------------------------------------------------------- -; Writes the specific Machine Status Register used on the newer Intel -; Pentium Pro and Pentium II motherboards. -;---------------------------------------------------------------------------- -cprocnear _MTRR_readMSR - - ARG reg:ULONG, v_eax:DPTR, v_edx:DPTR - - enter_c - mov ecx,[reg] - rdmsr - mov ebx,[v_eax] - mov [ebx],eax - mov ebx,[v_edx] - mov [ebx],edx - leave_c - ret - -cprocend - -;---------------------------------------------------------------------------- -; void _MTRR_writeMSR(uong reg, ulong eax, ulong edx); -;---------------------------------------------------------------------------- -; Writes the specific Machine Status Register used on the newer Intel -; Pentium Pro and Pentium II motherboards. -;---------------------------------------------------------------------------- -cprocnear _MTRR_writeMSR - - ARG reg:ULONG, v_eax:ULONG, v_edx:ULONG - - enter_c - mov ecx,[reg] - mov eax,[v_eax] - mov edx,[v_edx] - wrmsr - leave_c - ret - -cprocend - -endcodeseg _mtrr - - END ; End of module |
