| 1 | ; $Id: timerA-r0drv-os2.asm 93115 2022-01-01 11:31:46Z vboxsync $
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| 2 | ;; @file
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| 3 | ; IPRT - DevHelp_VMGlobalToProcess, Ring-0 Driver, OS/2.
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| 4 | ;
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| 5 |
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| 6 | ;
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| 7 | ; Contributed by knut st. osmundsen.
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| 8 | ;
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| 9 | ; Copyright (C) 2007-2022 Oracle Corporation
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| 10 | ;
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| 11 | ; This file is part of VirtualBox Open Source Edition (OSE), as
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| 12 | ; available from http://www.virtualbox.org. This file is free software;
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| 13 | ; you can redistribute it and/or modify it under the terms of the GNU
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| 14 | ; General Public License (GPL) as published by the Free Software
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| 15 | ; Foundation, in version 2 as it comes in the "COPYING" file of the
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| 16 | ; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 17 | ; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 18 | ;
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| 19 | ; The contents of this file may alternatively be used under the terms
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| 20 | ; of the Common Development and Distribution License Version 1.0
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| 21 | ; (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 22 | ; VirtualBox OSE distribution, in which case the provisions of the
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| 23 | ; CDDL are applicable instead of those of the GPL.
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| 24 | ;
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| 25 | ; You may elect to license modified versions of this file under the
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| 26 | ; terms and conditions of either the GPL or the CDDL or both.
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| 27 | ; --------------------------------------------------------------------
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| 28 | ;
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| 29 | ; This code is based on:
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| 30 | ;
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| 31 | ; Copyright (c) 2007 knut st. osmundsen <[email protected]>
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| 32 | ;
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| 33 | ; Permission is hereby granted, free of charge, to any person
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| 34 | ; obtaining a copy of this software and associated documentation
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| 35 | ; files (the "Software"), to deal in the Software without
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| 36 | ; restriction, including without limitation the rights to use,
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| 37 | ; copy, modify, merge, publish, distribute, sublicense, and/or sell
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| 38 | ; copies of the Software, and to permit persons to whom the
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| 39 | ; Software is furnished to do so, subject to the following
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| 40 | ; conditions:
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| 41 | ;
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| 42 | ; The above copyright notice and this permission notice shall be
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| 43 | ; included in all copies or substantial portions of the Software.
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| 44 | ;
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| 45 | ; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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| 46 | ; EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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| 47 | ; OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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| 48 | ; NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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| 49 | ; HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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| 50 | ; WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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| 51 | ; FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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| 52 | ; OTHER DEALINGS IN THE SOFTWARE.
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| 53 | ;
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| 54 |
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| 55 |
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| 56 | ;*******************************************************************************
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| 57 | ;* Header Files *
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| 58 | ;*******************************************************************************
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| 59 | %define RT_INCL_16BIT_SEGMENTS
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| 60 | %include "iprt/asmdefs.mac"
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| 61 | %include "iprt/err.mac"
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| 62 |
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| 63 |
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| 64 | ;*******************************************************************************
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| 65 | ;* External Symbols *
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| 66 | ;*******************************************************************************
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| 67 | extern KernThunkStackTo32
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| 68 | extern KernThunkStackTo16
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| 69 | extern NAME(rtTimerOs2Tick)
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| 70 | extern NAME(RTErrConvertFromOS2)
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| 71 | BEGINDATA16
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| 72 | extern NAME(g_fpfnDevHlp)
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| 73 |
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| 74 |
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| 75 | ;*******************************************************************************
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| 76 | ;* Defined Constants And Macros *
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| 77 | ;*******************************************************************************
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| 78 | %define DevHlp_SetTimer 01dh
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| 79 | %define DevHlp_ResetTimer 01eh
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| 80 |
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| 81 |
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| 82 | BEGINCODE
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| 83 |
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| 84 | ;;
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| 85 | ; Arms the our OS/2 timer.
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| 86 | ;
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| 87 | ; @returns IPRT status code.
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| 88 | ;
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| 89 | BEGINPROC_EXPORTED rtTimerOs2Arm
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| 90 | call KernThunkStackTo16
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| 91 | push ebp
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| 92 | mov ebp, esp
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| 93 |
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| 94 | ; jump to the 16-bit code.
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| 95 | ;jmp far dword NAME(rtTimerOs2Arm_16) wrt CODE16
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| 96 | db 066h
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| 97 | db 0eah
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| 98 | dw NAME(rtTimerOs2Arm_16) wrt CODE16
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| 99 | dw CODE16
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| 100 | BEGINCODE16
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| 101 | GLOBALNAME rtTimerOs2Arm_16
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| 102 |
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| 103 | ; setup and do the call
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| 104 | push ds
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| 105 | push es
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| 106 | mov dx, DATA16
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| 107 | mov ds, dx
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| 108 | mov es, dx
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| 109 |
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| 110 | mov ax, NAME(rtTimerOs2TickAsm) wrt CODE16
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| 111 | mov dl, DevHlp_SetTimer
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| 112 | call far [NAME(g_fpfnDevHlp)]
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| 113 |
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| 114 | pop es
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| 115 | pop ds
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| 116 |
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| 117 | ;jmp far dword NAME(rtTimerOs2Arm_32) wrt FLAT
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| 118 | db 066h
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| 119 | db 0eah
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| 120 | dd NAME(rtTimerOs2Arm_32) ;wrt FLAT
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| 121 | dw TEXT32 wrt FLAT
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| 122 | BEGINCODE
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| 123 | GLOBALNAME rtTimerOs2Arm_32
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| 124 | jc .error
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| 125 | xor eax, eax
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| 126 | .done:
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| 127 |
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| 128 | leave
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| 129 | push eax
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| 130 | call KernThunkStackTo32
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| 131 | pop eax
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| 132 | ret
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| 133 |
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| 134 | ; convert the error code.
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| 135 | .error:
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| 136 | and eax, 0ffffh
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| 137 | call NAME(RTErrConvertFromOS2)
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| 138 | jmp .done
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| 139 | ENDPROC rtTimerOs2Arm
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| 140 |
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| 141 |
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| 142 | ;;
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| 143 | ; Dearms the our OS/2 timer.
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| 144 | ;
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| 145 | ; @returns IPRT status code.
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| 146 | ;
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| 147 | BEGINPROC_EXPORTED rtTimerOs2Dearm
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| 148 | call KernThunkStackTo16
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| 149 | push ebp
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| 150 | mov ebp, esp
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| 151 |
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| 152 | ; jump to the 16-bit code.
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| 153 | ;jmp far dword NAME(rtTimerOs2Dearm_16) wrt CODE16
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| 154 | db 066h
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| 155 | db 0eah
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| 156 | dw NAME(rtTimerOs2Dearm_16) wrt CODE16
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| 157 | dw CODE16
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| 158 | BEGINCODE16
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| 159 | GLOBALNAME rtTimerOs2Dearm_16
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| 160 |
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| 161 | ; setup and do the call
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| 162 | push ds
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| 163 | push es
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| 164 | mov dx, DATA16
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| 165 | mov ds, dx
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| 166 | mov es, dx
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| 167 |
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| 168 | mov ax, NAME(rtTimerOs2TickAsm) wrt CODE16
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| 169 | mov dl, DevHlp_ResetTimer
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| 170 | call far [NAME(g_fpfnDevHlp)]
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| 171 |
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| 172 | pop es
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| 173 | pop ds
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| 174 |
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| 175 | ;jmp far dword NAME(rtTimerOs2Dearm_32) wrt FLAT
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| 176 | db 066h
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| 177 | db 0eah
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| 178 | dd NAME(rtTimerOs2Dearm_32) ;wrt FLAT
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| 179 | dw TEXT32 wrt FLAT
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| 180 | BEGINCODE
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| 181 | GLOBALNAME rtTimerOs2Dearm_32
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| 182 | jc .error
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| 183 | xor eax, eax
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| 184 | .done:
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| 185 |
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| 186 | ; epilogue
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| 187 | leave
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| 188 | push eax
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| 189 | call KernThunkStackTo32
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| 190 | pop eax
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| 191 | ret
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| 192 |
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| 193 | ; convert the error code.
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| 194 | .error:
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| 195 | and eax, 0ffffh
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| 196 | call NAME(RTErrConvertFromOS2)
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| 197 | jmp .done
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| 198 | ENDPROC rtTimerOs2Dearm
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| 199 |
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| 200 |
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| 201 | BEGINCODE16
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| 202 |
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| 203 | ;;
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| 204 | ; OS/2 timer tick callback.
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| 205 | ;
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| 206 | BEGINPROC rtTimerOs2TickAsm
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| 207 | push ds
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| 208 | push es
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| 209 | push ecx
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| 210 | push edx
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| 211 | push eax
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| 212 |
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| 213 | mov ax, DATA32 wrt FLAT
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| 214 | mov ds, ax
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| 215 | mov es, ax
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| 216 |
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| 217 | ;jmp far dword NAME(rtTimerOs2TickAsm_32) wrt FLAT
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| 218 | db 066h
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| 219 | db 0eah
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| 220 | dd NAME(rtTimerOs2TickAsm_32) ;wrt FLAT
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| 221 | dw TEXT32 wrt FLAT
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| 222 | BEGINCODE
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| 223 | GLOBALNAME rtTimerOs2TickAsm_32
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| 224 | call KernThunkStackTo32
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| 225 | call NAME(rtTimerOs2Tick)
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| 226 | call KernThunkStackTo16
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| 227 |
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| 228 | ;jmp far dword NAME(rtTimerOs2TickAsm_16) wrt CODE16
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| 229 | db 066h
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| 230 | db 0eah
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| 231 | dw NAME(rtTimerOs2TickAsm_16) wrt CODE16
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| 232 | dw CODE16
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| 233 | BEGINCODE16
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| 234 | GLOBALNAME rtTimerOs2TickAsm_16
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| 235 |
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| 236 | pop eax
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| 237 | pop edx
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| 238 | pop ecx
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| 239 | pop es
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| 240 | pop ds
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| 241 | retf
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| 242 | ENDPROC rtTimerOs2TickAsm
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