| 1 | ; $Id: startup.inc,v 1.1.1.1 2003/07/02 13:56:56 eleph Exp $
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| 2 | ;*
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| 3 | ;* Assembly macro and constant definitions
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| 4 | ;*
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| 5 | ;* (C) 2000-2002 InnoTek Systemberatung GmbH
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| 6 | ;* (C) 2000-2001 Sander van Leeuwen (sandervl@xs4all.nl)
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| 7 | ;*
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| 8 | ;* This program is free software; you can redistribute it and/or
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| 9 | ;* modify it under the terms of the GNU General Public License as
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| 10 | ;* published by the Free Software Foundation; either version 2 of
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| 11 | ;* the License, or (at your option) any later version.
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| 12 | ;*
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| 13 | ;* This program is distributed in the hope that it will be useful,
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| 14 | ;* but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 15 | ;* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 16 | ;* GNU General Public License for more details.
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| 17 | ;*
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| 18 | ;* You should have received a copy of the GNU General Public
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| 19 | ;* License along with this program; if not, write to the Free
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| 20 | ;* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
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| 21 | ;* USA.
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| 22 | ;*
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| 23 |
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| 24 |
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| 25 | ; MACRO'S
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| 26 | ;*******************************************************************************
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| 27 | ;enter a 16:32 far function
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| 28 | ;*******************************************************************************
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| 29 | enter32 MACRO
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| 30 | push bp
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| 31 | mov bp, sp
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| 32 | push ds
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| 33 | mov ax, DATA16
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| 34 | mov ds, ax
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| 35 | ENDM
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| 36 | ;*******************************************************************************
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| 37 | ;return to 16:32 far caller
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| 38 | ;*******************************************************************************
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| 39 | ret32 MACRO
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| 40 | pop ds
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| 41 | pop bp
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| 42 | db 66h ; Force next instruction 32-bit
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| 43 | ret
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| 44 | ENDM
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| 45 |
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| 46 | enter16 MACRO
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| 47 | push bp
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| 48 | mov bp, sp
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| 49 | ENDM
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| 50 | ret16 MACRO
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| 51 | pop bp
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| 52 | ret
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| 53 | ENDM
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| 54 |
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| 55 | ;pushfd/popfd trashed by fucking BUGY KernThunkStackTo32
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| 56 | ;fix idea by zuko
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| 57 |
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| 58 | ;;******************************************************************************
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| 59 | ;;Need to preserve fs:ebx!! (all other registers must be saved by the caller)
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| 60 | ;;******************************************************************************
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| 61 | DevThunkStackTo32 MACRO
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| 62 | push stacksel
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| 63 | push stackbase
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| 64 | push edx
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| 65 | mov edx, ss
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| 66 | mov stacksel, edx
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| 67 | pushfd
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| 68 | call KernThunkStackTo32
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| 69 | popfd
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| 70 | mov stackbase, edx
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| 71 | pop edx ;trashed by KernThunkStackTo32
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| 72 | ENDM
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| 73 |
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| 74 | ;;******************************************************************************
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| 75 | ;;******************************************************************************
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| 76 | DevThunkStackTo32_Int MACRO
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| 77 | push eax
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| 78 | push edx
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| 79 | pushfd
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| 80 | call KernThunkStackTo32
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| 81 | popfd
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| 82 | pop edx ;trashed by KernThunkStackTo32
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| 83 | pop eax ;trashed by KernThunkStackTo32
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| 84 | ENDM
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| 85 |
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| 86 | ;;******************************************************************************
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| 87 | ;;******************************************************************************
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| 88 | DevThunkStackTo16 MACRO
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| 89 | push edx
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| 90 | push eax
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| 91 | pushfd
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| 92 | call KernThunkStackTo16
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| 93 | popfd
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| 94 | pop eax ;trashed by KernThunkStackTo16
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| 95 | pop edx ;trashed by KernThunkStackTo16 when called in interrupt context
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| 96 | pop stackbase
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| 97 | pop stacksel
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| 98 | ENDM
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| 99 |
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| 100 | ;;******************************************************************************
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| 101 | ;;******************************************************************************
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| 102 | DevThunkStackTo16_Int MACRO
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| 103 | push edx
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| 104 | push eax
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| 105 | pushfd
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| 106 | call KernThunkStackTo16
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| 107 | popfd
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| 108 | pop eax ;trashed by KernThunkStackTo16
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| 109 | pop edx ;trashed by KernThunkStackTo16 when called in interrupt context
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| 110 | ENDM
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| 111 |
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| 112 | ;*******************************************************************************
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| 113 | ;enter a function that needs to switch to a 16 bits stack
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| 114 | ;*******************************************************************************
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| 115 | enterKEERM MACRO
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| 116 | push ebp
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| 117 | mov ebp, esp
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| 118 | push ds
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| 119 | push es
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| 120 | push ebx
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| 121 | push ecx
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| 122 | push edx
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| 123 | push esi
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| 124 | push edi
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| 125 | ;to access the parameters on the 32 bits stack, once we've switched
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| 126 | mov edi, ebp
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| 127 | DevThunkStackTo16_Int
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| 128 | ENDM
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| 129 |
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| 130 | ;*******************************************************************************
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| 131 | ;switch stack from 16 bits to 32 bits and return
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| 132 | ;*******************************************************************************
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| 133 | retKEERM MACRO
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| 134 | DevThunkStackTo32_Int
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| 135 | pop edi
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| 136 | pop esi
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| 137 | pop edx
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| 138 | pop ecx
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| 139 | pop ebx
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| 140 | pop es
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| 141 | pop ds
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| 142 | pop ebp
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| 143 | ret
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| 144 | ENDM
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| 145 |
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| 146 | ;;******************************************************************************
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| 147 | ;;******************************************************************************
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| 148 |
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| 149 |
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| 150 | ;Constants and structure definitions
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| 151 |
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| 152 | ; Status word masks
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| 153 | STERR EQU 8000H ; Bit 15 - Error
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| 154 | STINTER EQU 0400H ; Bit 10 - Interim character
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| 155 | STBUI EQU 0200H ; Bit 9 - Busy
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| 156 | STDON EQU 0100H ; Bit 8 - Done
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| 157 | STECODE EQU 00FFH ; Error code
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| 158 |
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| 159 | ; Definition of the request packet header.
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| 160 |
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| 161 | reqPacket struc
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| 162 | reqLenght db ?
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| 163 | reqUnit db ?
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| 164 | reqCommand db ?
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| 165 | reqStatus dw ?
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| 166 | reqFlags db ?
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| 167 | db 3 dup (?) ; Reserved field
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| 168 | reqLink dd ?
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| 169 | reqPacket ends
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| 170 |
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| 171 | rpInitIn struc
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| 172 | i_rph db size reqPacket dup (?)
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| 173 | i_unit db ?
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| 174 | i_devHelp dd ?
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| 175 | i_initArgs dd ?
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| 176 | i_driveNum db ?
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| 177 | rpInitIn ends
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| 178 |
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| 179 | rpInitOut struc
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| 180 | o_rph db size reqPacket dup (?)
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| 181 | o_unit db ?
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| 182 | o_codeend dw ?
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| 183 | o_dataend dw ?
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| 184 | o_bpbarray dd ?
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| 185 | o_status dw ?
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| 186 | rpInitOut ends
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