[541] | 1 | ; Project name : XTIDE Universal BIOS |
---|
| 2 | ; Description : Functions to handle DPT structs to present drive geometry |
---|
| 3 | ; to ill behaving applications that want |
---|
| 4 | ; to read DPT from interrupt vectors 41h and 46h. |
---|
| 5 | |
---|
| 6 | ; |
---|
| 7 | ; XTIDE Universal BIOS and Associated Tools |
---|
| 8 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team. |
---|
| 9 | ; |
---|
| 10 | ; This program is free software; you can redistribute it and/or modify |
---|
| 11 | ; it under the terms of the GNU General Public License as published by |
---|
| 12 | ; the Free Software Foundation; either version 2 of the License, or |
---|
| 13 | ; (at your option) any later version. |
---|
| 14 | ; |
---|
| 15 | ; This program is distributed in the hope that it will be useful, |
---|
| 16 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
| 17 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
---|
| 18 | ; GNU General Public License for more details. |
---|
| 19 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html |
---|
| 20 | ; |
---|
| 21 | |
---|
| 22 | ; Section containing code |
---|
| 23 | SECTION .text |
---|
| 24 | |
---|
| 25 | ;-------------------------------------------------------------------- |
---|
| 26 | ; CompatibleDPT_CreateToAXSIforDriveDL |
---|
| 27 | ; Parameters: |
---|
| 28 | ; DL: Drive number (80h or 81h) |
---|
| 29 | ; DS:DI: Ptr to DPT |
---|
| 30 | ; Returns: |
---|
| 31 | ; AX:SI Ptr to destination buffer |
---|
| 32 | ; Corrupts registers: |
---|
| 33 | ; CX, DX |
---|
| 34 | ;-------------------------------------------------------------------- |
---|
| 35 | CompatibleDPT_CreateToAXSIforDriveDL: |
---|
| 36 | push es |
---|
| 37 | |
---|
| 38 | call AccessDPT_GetDeviceControlByteToAL |
---|
| 39 | xchg cx, ax ; Device control byte to CL |
---|
| 40 | mov si, di ; DPT now in DS:SI |
---|
| 41 | call GetBufferForDrive80hToESDI |
---|
| 42 | shr dx, 1 |
---|
| 43 | jnc SHORT .BufferLoadedToESDI |
---|
| 44 | add di, BYTE TRANSLATED_DPT_size ; For drive 81h |
---|
| 45 | .BufferLoadedToESDI: |
---|
| 46 | |
---|
| 47 | call FillToESDIusingDPTfromDSSI |
---|
| 48 | xchg di, si |
---|
| 49 | mov ax, es |
---|
| 50 | |
---|
| 51 | pop es |
---|
| 52 | ret |
---|
| 53 | |
---|
| 54 | |
---|
| 55 | ;-------------------------------------------------------------------- |
---|
| 56 | ; GetTemporaryBufferForDPTEtoESDI |
---|
| 57 | ; GetBufferForDrive80hToESDI |
---|
| 58 | ; Parameters: |
---|
| 59 | ; DS: RAMVARS segment |
---|
| 60 | ; Returns: |
---|
| 61 | ; ES:DI: Ptr to buffer (in RAMVARS segment) |
---|
| 62 | ; Corrupts registers: |
---|
| 63 | ; Nothing |
---|
| 64 | ;-------------------------------------------------------------------- |
---|
| 65 | GetTemporaryBufferForDPTEtoESDI: |
---|
| 66 | call GetBufferForDrive80hToESDI |
---|
| 67 | add di, BYTE TRANSLATED_DPT_size * 2 |
---|
| 68 | ret |
---|
| 69 | |
---|
| 70 | GetBufferForDrive80hToESDI: |
---|
| 71 | push ds |
---|
| 72 | pop es |
---|
| 73 | mov di, [cs:ROMVARS.bStealSize] ; No harm to read WORD |
---|
| 74 | eSHL_IM di, 10 ; DI = RAMVARS size in bytes |
---|
| 75 | sub di, BYTE (TRANSLATED_DPT_size * 2) + DPTE_size |
---|
| 76 | ret |
---|
| 77 | |
---|
| 78 | |
---|
| 79 | ;-------------------------------------------------------------------- |
---|
| 80 | ; FillToESDIusingDPTfromDSSI |
---|
| 81 | ; Parameters: |
---|
| 82 | ; CL: Device Control Byte |
---|
| 83 | ; DS:SI: Ptr to DPT |
---|
| 84 | ; ES:DI Ptr to destination buffer |
---|
| 85 | ; Returns: |
---|
| 86 | ; Nothing |
---|
| 87 | ; Corrupts registers: |
---|
| 88 | ; AX, CX, DX |
---|
| 89 | ;-------------------------------------------------------------------- |
---|
| 90 | FillToESDIusingDPTfromDSSI: |
---|
| 91 | test BYTE [si+DPT.bFlagsLow], MASKL_DPT_TRANSLATEMODE |
---|
| 92 | jz SHORT FillStandardDPTtoESDIfromDPTinDSSI |
---|
| 93 | ; Fall to FillTranslatedDPTtoESDIfromDPTinDSSI |
---|
| 94 | |
---|
| 95 | ;-------------------------------------------------------------------- |
---|
| 96 | ; FillTranslatedDPTtoESDIfromDPTinDSSI |
---|
| 97 | ; Parameters: |
---|
| 98 | ; CL: Device Control Byte |
---|
| 99 | ; DS:SI: Ptr to DPT |
---|
| 100 | ; ES:DI: Ptr to destination buffer |
---|
| 101 | ; Returns: |
---|
| 102 | ; Nothing |
---|
| 103 | ; Corrupts registers: |
---|
| 104 | ; AX, CX, DX |
---|
| 105 | ;-------------------------------------------------------------------- |
---|
| 106 | FillTranslatedDPTtoESDIfromDPTinDSSI: |
---|
| 107 | xor dx, dx ; Clear for checksum |
---|
| 108 | mov ax, [si+DPT.wLchsCylinders] |
---|
[542] | 109 | ;MIN_U ax, MAX_LCHS_CYLINDERS ; Our DPT can have up to 1027 |
---|
[541] | 110 | call StoswThenAddALandAHtoDL ; Bytes 0 and 1 (Logical number of cylinders) |
---|
| 111 | |
---|
| 112 | mov al, BYTE [si+DPT.bLchsHeads] |
---|
| 113 | mov ah, TRANSLATED_DPT_SIGNATURE |
---|
| 114 | call StoswThenAddALandAHtoDL ; Bytes 2 (Logical number of heads) and 3 (Axh signature to indicate Translated DPT) |
---|
| 115 | |
---|
| 116 | eMOVZX ax, BYTE [si+DPT.bPchsSectorsPerTrack] |
---|
| 117 | call StoswThenAddALandAHtoDL ; Bytes 4 (Physical sectors per track) and 5 (Write Precompensation Cylinder low) |
---|
| 118 | |
---|
| 119 | mov al, ah |
---|
| 120 | call StoswThenAddALandAHtoDL ; Bytes 6 (Write Precompensation Cylinder high) and 7 |
---|
| 121 | |
---|
| 122 | xchg ax, cx ; Device Control byte to AL |
---|
| 123 | mov ah, [si+DPT.wPchsCylinders] |
---|
| 124 | call StoswThenAddALandAHtoDL ; Bytes 8 (Drive Control Byte) and 9 (Physical number of cylinders low) |
---|
| 125 | |
---|
| 126 | mov al, [si+DPT.wPchsCylinders+1] |
---|
| 127 | mov ah, [si+DPT.bPchsHeads] |
---|
| 128 | call StoswThenAddALandAHtoDL ; Bytes 10 (Physical number of cylinders high) and 11 (Physical number of heads) |
---|
| 129 | |
---|
| 130 | xor ax, ax |
---|
| 131 | call StoswThenAddALandAHtoDL ; Bytes 12 and 13 (Landing Zone Cylinder) |
---|
| 132 | |
---|
| 133 | mov al, [si+DPT.bLchsSectorsPerTrack] |
---|
| 134 | %ifdef USE_186 |
---|
| 135 | push FillStandardDPTtoESDIfromDPTinDSSI.RestoreOffsetsAndReturn |
---|
| 136 | jmp StoswALandChecksumFromDL ; Bytes 14 (Logical sectors per track) and 15 (Checksum) |
---|
| 137 | %else |
---|
| 138 | call StoswALandChecksumFromDL |
---|
| 139 | jmp SHORT FillStandardDPTtoESDIfromDPTinDSSI.RestoreOffsetsAndReturn |
---|
| 140 | %endif |
---|
| 141 | |
---|
| 142 | |
---|
| 143 | ;-------------------------------------------------------------------- |
---|
| 144 | ; FillStandardDPTtoESDIfromDPTinDSSI |
---|
| 145 | ; Parameters: |
---|
| 146 | ; CL: Device Control Byte |
---|
| 147 | ; DS:SI: Ptr to DPT |
---|
| 148 | ; ES:DI: Ptr to destination buffer |
---|
| 149 | ; Returns: |
---|
| 150 | ; Nothing |
---|
| 151 | ; Corrupts registers: |
---|
| 152 | ; AX |
---|
| 153 | ;-------------------------------------------------------------------- |
---|
| 154 | FillStandardDPTtoESDIfromDPTinDSSI: |
---|
| 155 | mov ax, [si+DPT.wLchsCylinders] |
---|
| 156 | stosw ; Bytes 0 and 1 (Physical number of cylinders) |
---|
| 157 | eMOVZX ax, BYTE [si+DPT.bLchsHeads] |
---|
| 158 | stosw ; Bytes 2 (Physical number of heads) and 3 |
---|
| 159 | mov al, ah ; Zero AX |
---|
| 160 | stosw ; Bytes 4 and 5 (Write Precompensation Cylinder low) |
---|
| 161 | stosw ; Bytes 6 (Write Precompensation Cylinder high) and 7 |
---|
| 162 | mov al, cl ; Device control byte to AL |
---|
| 163 | stosw ; Bytes 8 (Drive Control Byte) and 9 |
---|
| 164 | mov al, ah ; Zero AX |
---|
| 165 | stosw ; Bytes 10 and 11 |
---|
| 166 | stosw ; Bytes 12 and 13 (Landing Zone Cylinder) |
---|
| 167 | mov al, [si+DPT.bLchsSectorsPerTrack] |
---|
| 168 | stosw ; Bytes 14 (Physical sectors per track) and 15 |
---|
| 169 | |
---|
| 170 | .RestoreOffsetsAndReturn: |
---|
| 171 | sub di, BYTE STANDARD_DPT_size |
---|
| 172 | ret |
---|
| 173 | |
---|
| 174 | |
---|
| 175 | ;-------------------------------------------------------------------- |
---|
| 176 | ; CompatibleDPT_CreateDeviceParameterTableExtensionToESBXfromDPTinDSSI |
---|
| 177 | ; Parameters: |
---|
| 178 | ; DS:SI: Ptr to DPT (in RAMVARS segment) |
---|
| 179 | ; Returns: |
---|
| 180 | ; ES:BX: Ptr to Device Parameter Table Extension (DPTE) |
---|
| 181 | ; Corrupts registers: |
---|
| 182 | ; AX, CX, DX, DI |
---|
| 183 | ;-------------------------------------------------------------------- |
---|
| 184 | CompatibleDPT_CreateDeviceParameterTableExtensionToESBXfromDPTinDSSI: |
---|
| 185 | call GetTemporaryBufferForDPTEtoESDI ; valid until next AH=48h call |
---|
| 186 | |
---|
| 187 | ; Set 32-bit flag for 32-bit controllers |
---|
| 188 | mov cx, FLG_LBA_TRANSLATION_ENABLED ; DPTE.wFlags |
---|
| 189 | cmp BYTE [si+DPT_ATA.bDevice], DEVICE_32BIT_ATA |
---|
| 190 | eCMOVE cl, FLG_LBA_TRANSLATION_ENABLED | FLG_32BIT_XFER_MODE |
---|
| 191 | |
---|
| 192 | ; DPTE.wBasePort |
---|
| 193 | mov ax, [si+DPT.wBasePort] |
---|
| 194 | call StoswThenAddALandAHtoDL ; Bytes 0 and 1 |
---|
| 195 | |
---|
| 196 | ; DPTE.wControlBlockPort |
---|
| 197 | eMOVZX bx, BYTE [si+DPT.bIdevarsOffset] |
---|
| 198 | mov ax, [cs:bx+IDEVARS.wControlBlockPort] |
---|
| 199 | call StoswThenAddALandAHtoDL ; Bytes 2 and 3 |
---|
| 200 | |
---|
| 201 | ; DPTE.bDrvnhead and DPTE.bBiosVendor |
---|
| 202 | xchg di, si |
---|
[542] | 203 | call AccessDPT_GetDriveSelectByteToAL |
---|
[541] | 204 | xchg si, di |
---|
| 205 | call StoswThenAddALandAHtoDL ; Bytes 4 and 5 |
---|
| 206 | |
---|
| 207 | ; DPTE.bIRQ and DPTE.bBlockSize |
---|
| 208 | mov al, [cs:bx+IDEVARS.bIRQ] ; No way to define that we might not use IRQ |
---|
| 209 | mov ah, [si+DPT_ATA.bBlockSize] |
---|
| 210 | cmp ah, 1 |
---|
| 211 | jbe SHORT .DoNotSetBlockModeFlag |
---|
| 212 | or cl, FLG_BLOCK_MODE_ENABLED |
---|
| 213 | .DoNotSetBlockModeFlag: |
---|
| 214 | call StoswThenAddALandAHtoDL ; Bytes 6 and 7 |
---|
| 215 | |
---|
| 216 | ; DPTE.bDmaChannelAndType and DPTE.bPioMode |
---|
| 217 | xor ax, ax |
---|
| 218 | %ifdef MODULE_ADVANCED_ATA |
---|
| 219 | or ah, [si+DPT_ADVANCED_ATA.bPioMode] |
---|
| 220 | jz SHORT .NoDotSetFastPioFlag |
---|
| 221 | cmp WORD [si+DPT_ADVANCED_ATA.wControllerID], BYTE 0 |
---|
| 222 | je SHORT .NoDotSetFastPioFlag |
---|
| 223 | inc cx ; FLG_FAST_PIO_ENABLED |
---|
| 224 | .NoDotSetFastPioFlag: |
---|
| 225 | %endif |
---|
| 226 | call StoswThenAddALandAHtoDL ; Bytes 8 and 9 |
---|
| 227 | |
---|
| 228 | ; Set CHS translation flags and store DPTE.wFlags |
---|
| 229 | mov al, [si+DPT.bFlagsLow] |
---|
| 230 | and al, MASKL_DPT_TRANSLATEMODE |
---|
| 231 | jz SHORT .NoChsTranslationOrBitShiftTranslationSet |
---|
| 232 | or cl, FLG_CHS_TRANSLATION_ENABLED |
---|
| 233 | test al, FLGL_DPT_ASSISTED_LBA |
---|
| 234 | jz SHORT .NoChsTranslationOrBitShiftTranslationSet |
---|
| 235 | or cx, LBA_ASSISTED_TRANSLATION << TRANSLATION_TYPE_FIELD_POSITION |
---|
| 236 | .NoChsTranslationOrBitShiftTranslationSet: |
---|
| 237 | xchg ax, cx |
---|
| 238 | call StoswThenAddALandAHtoDL ; Bytes 10 and 11 |
---|
| 239 | |
---|
| 240 | ; DPTE.wReserved (must be zero) |
---|
| 241 | xor ax, ax |
---|
| 242 | call StoswThenAddALandAHtoDL ; Bytes 12 and 13 |
---|
| 243 | |
---|
| 244 | ; DPTE.bRevision and DPTE.bChecksum |
---|
| 245 | mov al, DPTE_REVISION |
---|
| 246 | call StoswALandChecksumFromDL ; Bytes 14 and 15 |
---|
| 247 | lea bx, [di-DPTE_size] |
---|
| 248 | ret |
---|
| 249 | |
---|
| 250 | |
---|
| 251 | ;-------------------------------------------------------------------- |
---|
| 252 | ; StoswThenAddALandAHtoDL |
---|
| 253 | ; Parameters: |
---|
| 254 | ; AX: WORD to store |
---|
| 255 | ; DL: Sum of bytes so far |
---|
| 256 | ; ES:DI: Ptr to where to store AX |
---|
| 257 | ; Returns: |
---|
| 258 | ; DL: Sum of bytes so far |
---|
| 259 | ; DI: Incremented by 2 |
---|
| 260 | ; Corrupts registers: |
---|
| 261 | ; Nothing |
---|
| 262 | ;-------------------------------------------------------------------- |
---|
| 263 | StoswThenAddALandAHtoDL: |
---|
| 264 | stosw |
---|
| 265 | add dl, al |
---|
| 266 | add dl, ah |
---|
| 267 | ret |
---|
| 268 | |
---|
| 269 | |
---|
| 270 | ;-------------------------------------------------------------------- |
---|
| 271 | ; StoswALandChecksumFromDL |
---|
| 272 | ; Parameters: |
---|
| 273 | ; AL: Last byte to store before checksum byte |
---|
| 274 | ; DL: Sum of bytes so far |
---|
| 275 | ; ES:DI: Ptr to where to store AL and Checksum byte |
---|
| 276 | ; Returns: |
---|
| 277 | ; DL: Sum of bytes so far |
---|
| 278 | ; DI: Incremented by 2 |
---|
| 279 | ; Corrupts registers: |
---|
| 280 | ; Nothing |
---|
| 281 | ;-------------------------------------------------------------------- |
---|
| 282 | StoswALandChecksumFromDL: |
---|
| 283 | mov ah, al |
---|
| 284 | add ah, dl |
---|
| 285 | neg ah |
---|
| 286 | stosw |
---|
| 287 | ret |
---|