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|
; $Id: timerA-r0drv-os2.asm $
;; @file
; IPRT - DevHelp_VMGlobalToProcess, Ring-0 Driver, OS/2.
;
;
; Copyright (c) 2007 knut st. osmundsen <bird-src-spam@anduin.net>
;
; Permission is hereby granted, free of charge, to any person
; obtaining a copy of this software and associated documentation
; files (the "Software"), to deal in the Software without
; restriction, including without limitation the rights to use,
; copy, modify, merge, publish, distribute, sublicense, and/or sell
; copies of the Software, and to permit persons to whom the
; Software is furnished to do so, subject to the following
; conditions:
;
; The above copyright notice and this permission notice shall be
; included in all copies or substantial portions of the Software.
;
; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
; EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
; OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
; NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
; HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
; WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
; FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
; OTHER DEALINGS IN THE SOFTWARE.
;
;*******************************************************************************
;* Header Files *
;*******************************************************************************
%define RT_INCL_16BIT_SEGMENTS
%include "iprt/asmdefs.mac"
%include "iprt/err.mac"
;*******************************************************************************
;* External Symbols *
;*******************************************************************************
extern KernThunkStackTo32
extern KernThunkStackTo16
extern NAME(rtTimerOs2Tick)
extern NAME(RTErrConvertFromOS2)
BEGINDATA16
extern NAME(g_fpfnDevHlp)
;*******************************************************************************
;* Defined Constants And Macros *
;*******************************************************************************
%define DevHlp_SetTimer 01dh
%define DevHlp_ResetTimer 01eh
BEGINCODE
;;
; Arms the our OS/2 timer.
;
; @returns IPRT status code.
;
BEGINPROC_EXPORTED rtTimerOs2Arm
call KernThunkStackTo16
push ebp
mov ebp, esp
; jump to the 16-bit code.
;jmp far dword NAME(rtTimerOs2Arm_16) wrt CODE16
db 066h
db 0eah
dw NAME(rtTimerOs2Arm_16) wrt CODE16
dw CODE16
BEGINCODE16
GLOBALNAME rtTimerOs2Arm_16
; setup and do the call
push ds
push es
mov dx, DATA16
mov ds, dx
mov es, dx
mov ax, NAME(rtTimerOs2TickAsm) wrt CODE16
mov dl, DevHlp_SetTimer
call far [NAME(g_fpfnDevHlp)]
pop es
pop ds
;jmp far dword NAME(rtTimerOs2Arm_32) wrt FLAT
db 066h
db 0eah
dd NAME(rtTimerOs2Arm_32) ;wrt FLAT
dw TEXT32 wrt FLAT
BEGINCODE
GLOBALNAME rtTimerOs2Arm_32
jc .error
xor eax, eax
.done:
leave
push eax
call KernThunkStackTo32
pop eax
ret
; convert the error code.
.error:
and eax, 0ffffh
call NAME(RTErrConvertFromOS2)
jmp .done
ENDPROC rtTimerOs2Arm
;;
; Dearms the our OS/2 timer.
;
; @returns IPRT status code.
;
BEGINPROC_EXPORTED rtTimerOs2Dearm
call KernThunkStackTo16
push ebp
mov ebp, esp
; jump to the 16-bit code.
;jmp far dword NAME(rtTimerOs2Dearm_16) wrt CODE16
db 066h
db 0eah
dw NAME(rtTimerOs2Dearm_16) wrt CODE16
dw CODE16
BEGINCODE16
GLOBALNAME rtTimerOs2Dearm_16
; setup and do the call
push ds
push es
mov dx, DATA16
mov ds, dx
mov es, dx
mov ax, NAME(rtTimerOs2TickAsm) wrt CODE16
mov dl, DevHlp_ResetTimer
call far [NAME(g_fpfnDevHlp)]
pop es
pop ds
;jmp far dword NAME(rtTimerOs2Dearm_32) wrt FLAT
db 066h
db 0eah
dd NAME(rtTimerOs2Dearm_32) ;wrt FLAT
dw TEXT32 wrt FLAT
BEGINCODE
GLOBALNAME rtTimerOs2Dearm_32
jc .error
xor eax, eax
.done:
; epilogue
leave
push eax
call KernThunkStackTo32
pop eax
ret
; convert the error code.
.error:
and eax, 0ffffh
call NAME(RTErrConvertFromOS2)
jmp .done
ENDPROC rtTimerOs2Dearm
BEGINCODE16
;;
; OS/2 timer tick callback.
;
BEGINPROC rtTimerOs2TickAsm
push ds
push es
push ecx
push edx
push eax
mov ax, DATA32 wrt FLAT
mov ds, ax
mov es, ax
;jmp far dword NAME(rtTimerOs2TickAsm_32) wrt FLAT
db 066h
db 0eah
dd NAME(rtTimerOs2TickAsm_32) ;wrt FLAT
dw TEXT32 wrt FLAT
BEGINCODE
GLOBALNAME rtTimerOs2TickAsm_32
call KernThunkStackTo32
call NAME(rtTimerOs2Tick)
call KernThunkStackTo16
;jmp far dword NAME(rtTimerOs2TickAsm_16) wrt CODE16
db 066h
db 0eah
dw NAME(rtTimerOs2TickAsm_16) wrt CODE16
dw CODE16
BEGINCODE16
GLOBALNAME rtTimerOs2TickAsm_16
pop eax
pop edx
pop ecx
pop es
pop ds
retf
ENDPROC rtTimerOs2TickAsm
|
