| ;**************************************************************************** |
| ;* |
| ;* 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: 32-bit Windows NT device driver |
| ;* |
| ;* Description: Low level assembly support for the PM library specific to |
| ;* Windows NT device drivers. |
| ;* |
| ;**************************************************************************** |
| |
| IDEAL |
| |
| include "scitech.mac" ; Memory model macros |
| |
| header _pm ; Set up memory model |
| |
| P586 |
| |
| begdataseg |
| |
| ; Watcom C++ externals required to link when compiling floating point |
| ; C code. They are not actually used in the code because we compile with |
| ; inline floating point instructions, however the compiler still generates |
| ; the references in the object modules. |
| |
| __8087 dd 0 |
| PUBLIC __8087 |
| __imthread: |
| __fltused: |
| _fltused_ dd 0 |
| PUBLIC __imthread |
| PUBLIC _fltused_ |
| PUBLIC __fltused |
| |
| enddataseg |
| |
| begcodeseg _pm ; Start of code segment |
| |
| ;---------------------------------------------------------------------------- |
| ; void PM_segread(PMSREGS *sregs) |
| ;---------------------------------------------------------------------------- |
| ; Read the current value of all segment registers |
| ;---------------------------------------------------------------------------- |
| cprocstart PM_segread |
| |
| ARG sregs:DPTR |
| |
| enter_c |
| |
| mov ax,es |
| _les _si,[sregs] |
| mov [_ES _si],ax |
| mov [_ES _si+2],cs |
| mov [_ES _si+4],ss |
| mov [_ES _si+6],ds |
| mov [_ES _si+8],fs |
| mov [_ES _si+10],gs |
| |
| leave_c |
| ret |
| |
| cprocend |
| |
| ;---------------------------------------------------------------------------- |
| ; int PM_int386x(int intno, PMREGS *in, PMREGS *out,PMSREGS *sregs) |
| ;---------------------------------------------------------------------------- |
| ; Issues a software interrupt in protected mode. This routine has been |
| ; written to allow user programs to load CS and DS with different values |
| ; other than the default. |
| ;---------------------------------------------------------------------------- |
| cprocstart PM_int386x |
| |
| ; Not used for NT device drivers |
| |
| ret |
| |
| cprocend |
| |
| ;---------------------------------------------------------------------------- |
| ; void PM_setBankA(int bank) |
| ;---------------------------------------------------------------------------- |
| cprocstart PM_setBankA |
| |
| ; Not used for NT device drivers |
| |
| ret |
| |
| cprocend |
| |
| ;---------------------------------------------------------------------------- |
| ; void PM_setBankAB(int bank) |
| ;---------------------------------------------------------------------------- |
| cprocstart PM_setBankAB |
| |
| ; Not used for NT device drivers |
| |
| ret |
| |
| cprocend |
| |
| ;---------------------------------------------------------------------------- |
| ; void PM_setCRTStart(int x,int y,int waitVRT) |
| ;---------------------------------------------------------------------------- |
| cprocstart PM_setCRTStart |
| |
| ; Not used for NT device drivers |
| |
| ret |
| |
| cprocend |
| |
| ; Macro to delay briefly to ensure that enough time has elapsed between |
| ; successive I/O accesses so that the device being accessed can respond |
| ; to both accesses even on a very fast PC. |
| |
| ifdef USE_NASM |
| %macro DELAY 0 |
| jmp short $+2 |
| jmp short $+2 |
| jmp short $+2 |
| %endmacro |
| %macro IODELAYN 1 |
| %rep %1 |
| DELAY |
| %endrep |
| %endmacro |
| else |
| macro DELAY |
| jmp short $+2 |
| jmp short $+2 |
| jmp short $+2 |
| endm |
| macro IODELAYN N |
| rept N |
| DELAY |
| endm |
| endm |
| endif |
| |
| ;---------------------------------------------------------------------------- |
| ; uchar _PM_readCMOS(int index) |
| ;---------------------------------------------------------------------------- |
| ; Read the value of a specific CMOS register. We do this with both |
| ; normal interrupts and NMI disabled. |
| ;---------------------------------------------------------------------------- |
| cprocstart _PM_readCMOS |
| |
| ARG index:UINT |
| |
| push _bp |
| mov _bp,_sp |
| pushfd |
| mov al,[BYTE index] |
| or al,80h ; Add disable NMI flag |
| cli |
| out 70h,al |
| IODELAYN 5 |
| in al,71h |
| mov ah,al |
| xor al,al |
| IODELAYN 5 |
| out 70h,al ; Re-enable NMI |
| mov al,ah ; Return value in AL |
| popfd |
| pop _bp |
| ret |
| |
| cprocend |
| |
| ;---------------------------------------------------------------------------- |
| ; void _PM_writeCMOS(int index,uchar value) |
| ;---------------------------------------------------------------------------- |
| ; Read the value of a specific CMOS register. We do this with both |
| ; normal interrupts and NMI disabled. |
| ;---------------------------------------------------------------------------- |
| cprocstart _PM_writeCMOS |
| |
| ARG index:UINT, value:UCHAR |
| |
| push _bp |
| mov _bp,_sp |
| pushfd |
| mov al,[BYTE index] |
| or al,80h ; Add disable NMI flag |
| cli |
| out 70h,al |
| IODELAYN 5 |
| mov al,[value] |
| out 71h,al |
| xor al,al |
| IODELAYN 5 |
| out 70h,al ; Re-enable NMI |
| popfd |
| pop _bp |
| ret |
| |
| cprocend |
| |
| ;---------------------------------------------------------------------------- |
| ; double _ftol(double f) |
| ;---------------------------------------------------------------------------- |
| ; Calls to __ftol are generated by the Borland C++ compiler for code |
| ; that needs to convert a floating point type to an integral type. |
| ; |
| ; Input: floating point number on the top of the '87. |
| ; |
| ; Output: a (signed or unsigned) long in EAX |
| ; All other registers preserved. |
| ;----------------------------------------------------------------------- |
| cprocstart _ftol |
| |
| LOCAL temp1:WORD, temp2:QWORD = LocalSize |
| |
| push ebp |
| mov ebp,esp |
| sub esp,LocalSize |
| |
| fstcw [temp1] ; save the control word |
| fwait |
| mov al,[BYTE temp1+1] |
| or [BYTE temp1+1],0Ch ; set rounding control to chop |
| fldcw [temp1] |
| fistp [temp2] ; convert to 64-bit integer |
| mov [BYTE temp1+1],al |
| fldcw [temp1] ; restore the control word |
| mov eax,[DWORD temp2] ; return LS 32 bits |
| mov edx,[DWORD temp2+4] ; MS 32 bits |
| |
| mov esp,ebp |
| pop ebp |
| ret |
| |
| cprocend |
| |
| ;---------------------------------------------------------------------------- |
| ; _PM_getPDB - Return the Page Table Directory Base address |
| ;---------------------------------------------------------------------------- |
| cprocstart _PM_getPDB |
| |
| mov eax,cr3 |
| and eax,0FFFFF000h |
| ret |
| |
| cprocend |
| |
| ;---------------------------------------------------------------------------- |
| ; Flush the Translation Lookaside buffer |
| ;---------------------------------------------------------------------------- |
| cprocstart PM_flushTLB |
| |
| wbinvd ; Flush the CPU cache |
| mov eax,cr3 |
| mov cr3,eax ; Flush the TLB |
| ret |
| |
| cprocend |
| |
| endcodeseg _pm |
| |
| END ; End of module |
