[150] | 1 | ; Project name : XTIDE Universal BIOS |
---|
[3] | 2 | ; Description : Functions for detecting drive for the BIOS. |
---|
| 3 | |
---|
[376] | 4 | ; |
---|
| 5 | ; XTIDE Universal BIOS and Associated Tools |
---|
| 6 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2012 by XTIDE Universal BIOS Team. |
---|
| 7 | ; |
---|
| 8 | ; This program is free software; you can redistribute it and/or modify |
---|
| 9 | ; it under the terms of the GNU General Public License as published by |
---|
| 10 | ; the Free Software Foundation; either version 2 of the License, or |
---|
| 11 | ; (at your option) any later version. |
---|
| 12 | ; |
---|
| 13 | ; This program is distributed in the hope that it will be useful, |
---|
| 14 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
| 15 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
---|
| 16 | ; GNU General Public License for more details. |
---|
| 17 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html |
---|
| 18 | ; |
---|
| 19 | |
---|
[3] | 20 | ; Section containing code |
---|
| 21 | SECTION .text |
---|
| 22 | |
---|
| 23 | ;-------------------------------------------------------------------- |
---|
| 24 | ; Detects all IDE hard disks to be controlled by this BIOS. |
---|
| 25 | ; |
---|
| 26 | ; DetectDrives_FromAllIDEControllers |
---|
| 27 | ; Parameters: |
---|
| 28 | ; DS: RAMVARS segment |
---|
| 29 | ; ES: BDA segment (zero) |
---|
| 30 | ; Returns: |
---|
| 31 | ; Nothing |
---|
| 32 | ; Corrupts registers: |
---|
| 33 | ; All (not segments) |
---|
| 34 | ;-------------------------------------------------------------------- |
---|
| 35 | DetectDrives_FromAllIDEControllers: |
---|
[33] | 36 | call RamVars_GetIdeControllerCountToCX |
---|
[3] | 37 | mov bp, ROMVARS.ideVars0 ; CS:BP now points to first IDEVARS |
---|
[200] | 38 | |
---|
| 39 | .DriveDetectLoop: ; Loop through IDEVARS |
---|
[233] | 40 | push cx |
---|
| 41 | |
---|
| 42 | mov cx, g_szDetectMaster |
---|
| 43 | mov bh, MASK_DRVNHEAD_SET ; Select Master drive |
---|
[294] | 44 | call StartDetectionWithDriveSelectByteInBHandStringInCX ; Detect and create DPT + BOOTNFO |
---|
[233] | 45 | |
---|
| 46 | mov cx, g_szDetectSlave |
---|
[242] | 47 | mov bh, MASK_DRVNHEAD_SET | FLG_DRVNHEAD_DRV |
---|
[294] | 48 | call StartDetectionWithDriveSelectByteInBHandStringInCX |
---|
[242] | 49 | |
---|
[233] | 50 | pop cx |
---|
| 51 | |
---|
| 52 | add bp, BYTE IDEVARS_size ; Point to next IDEVARS |
---|
| 53 | |
---|
[242] | 54 | %ifdef MODULE_SERIAL |
---|
[262] | 55 | jcxz .AddHardDisks ; Set to zero on .ideVarsSerialAuto iteration (if any) |
---|
[196] | 56 | %endif |
---|
[3] | 57 | loop .DriveDetectLoop |
---|
[203] | 58 | |
---|
[242] | 59 | %ifdef MODULE_SERIAL |
---|
[258] | 60 | ;---------------------------------------------------------------------- |
---|
[203] | 61 | ; |
---|
[233] | 62 | ; if serial drive detected, do not scan (avoids duplicate drives and isn't needed - we already have a connection) |
---|
[203] | 63 | ; |
---|
[233] | 64 | call FindDPT_ToDSDIforSerialDevice |
---|
[262] | 65 | jnc .AddHardDisks |
---|
[233] | 66 | |
---|
[242] | 67 | mov bp, ROMVARS.ideVarsSerialAuto ; Point to our special IDEVARS structure, just for serial scans |
---|
| 68 | |
---|
[200] | 69 | mov al,[cs:ROMVARS.wFlags] ; Configurator set to always scan? |
---|
| 70 | or al,[es:BDA.bKBFlgs1] ; Or, did the user hold down the ALT key? |
---|
| 71 | and al,8 ; 8 = alt key depressed, same as FLG_ROMVARS_SERIAL_ALWAYSDETECT |
---|
[242] | 72 | jnz .DriveDetectLoop |
---|
[233] | 73 | %endif |
---|
[203] | 74 | |
---|
[262] | 75 | .AddHardDisks: |
---|
[258] | 76 | ;---------------------------------------------------------------------- |
---|
| 77 | ; |
---|
[262] | 78 | ; Add in hard disks to BDA, finalize our Count and First variables |
---|
[258] | 79 | ; |
---|
[269] | 80 | ; Note that we perform the add to bHDCount and store bFirstDrv even if the count is zero. |
---|
| 81 | ; This is done because we use the value of .bFirstDrv to know how many drives were in the system |
---|
| 82 | ; at the time of boot, and to return that number on int13h/8h calls. Because the count is zero, |
---|
| 83 | ; FindDPT_ForDriveNumber will not find any drives that are ours. |
---|
| 84 | ; |
---|
[262] | 85 | mov cx, [RAMVARS.wDrvCntAndFlopCnt] ; Our count of hard disks |
---|
[258] | 86 | |
---|
[262] | 87 | mov al, [es:BDA.bHDCount] |
---|
| 88 | add cl, al ; Add our drives to the system count |
---|
[294] | 89 | mov [es:BDA.bHDCount], cl |
---|
| 90 | or al, 80h ; Or in hard disk flag |
---|
| 91 | mov [RAMVARS.bFirstDrv], al ; Store first drive number |
---|
[262] | 92 | |
---|
[294] | 93 | .AddFloppies: |
---|
| 94 | %ifdef MODULE_SERIAL_FLOPPY |
---|
[262] | 95 | ;---------------------------------------------------------------------- |
---|
| 96 | ; |
---|
| 97 | ; Add in any emulated serial floppy drives, finalize our packed Count and First variables |
---|
| 98 | ; |
---|
| 99 | dec ch |
---|
| 100 | mov al, ch |
---|
[294] | 101 | js .NoFloppies ; if no drives are present, we store 0ffh |
---|
[262] | 102 | |
---|
[258] | 103 | call FloppyDrive_GetCountFromBIOS_or_BDA |
---|
| 104 | |
---|
| 105 | push ax |
---|
| 106 | |
---|
[262] | 107 | add al, ch ; Add our drives to existing drive count |
---|
[258] | 108 | cmp al, 3 ; For BDA, max out at 4 drives (ours is zero based) |
---|
[294] | 109 | jb .MaxBDAFloppiesExceeded |
---|
| 110 | mov al, 3 |
---|
[258] | 111 | .MaxBDAFloppiesExceeded: |
---|
| 112 | eROR_IM al, 2 ; move to bits 6-7 |
---|
| 113 | inc ax ; low order bit, indicating floppy drive exists |
---|
| 114 | |
---|
[294] | 115 | mov ah, [es:BDA.wEquipment] ; Load Equipment WORD low byte |
---|
[258] | 116 | and ah, 03eh ; Mask off drive number and drives present bit |
---|
| 117 | or al, ah ; Or in new values |
---|
| 118 | mov [es:BDA.wEquipment], al ; and store |
---|
| 119 | |
---|
| 120 | mov al, 1eh ; BDA pointer to Floppy DPT |
---|
| 121 | mov si, AH8h_FloppyDPT |
---|
| 122 | call Interrupts_InstallHandlerToVectorInALFromCSSI |
---|
| 123 | |
---|
| 124 | pop ax |
---|
| 125 | |
---|
[262] | 126 | shr ch, 1 ; number of drives, 1 or 2 only, to CF flag (clear=1, set=2) |
---|
[258] | 127 | rcl al, 1 ; starting drive number in upper 7 bits, number of drives in low bit |
---|
[294] | 128 | .NoFloppies: |
---|
[258] | 129 | mov [RAMVARS.xlateVars+XLATEVARS.bFlopCntAndFirst], al |
---|
[263] | 130 | %endif |
---|
[294] | 131 | |
---|
[3] | 132 | ret |
---|
| 133 | |
---|
[294] | 134 | %ifndef CHECK_FOR_UNUSED_ENTRYPOINTS |
---|
[261] | 135 | %if FLG_ROMVARS_SERIAL_SCANDETECT != 8 |
---|
| 136 | %error "DetectDrives is currently coded to assume that FLG_ROMVARS_SERIAL_SCANDETECT is the same bit as the ALT key code in the BDA. Changes in the code will be needed if these values are no longer the same." |
---|
| 137 | %endif |
---|
[199] | 138 | %endif |
---|
| 139 | |
---|
[242] | 140 | |
---|
[3] | 141 | ;-------------------------------------------------------------------- |
---|
[294] | 142 | ; StartDetectionWithDriveSelectByteInBHandStringInCX |
---|
[3] | 143 | ; Parameters: |
---|
| 144 | ; BH: Drive Select byte for Drive and Head Register |
---|
[233] | 145 | ; CX: Offset to "Master" or "Slave" string |
---|
[3] | 146 | ; CS:BP: Ptr to IDEVARS for the drive |
---|
| 147 | ; DS: RAMVARS segment |
---|
| 148 | ; ES: Zero (BDA segment) |
---|
| 149 | ; Returns: |
---|
[203] | 150 | ; None |
---|
[3] | 151 | ; Corrupts registers: |
---|
[98] | 152 | ; AX, BX, CX, DX, SI, DI |
---|
[3] | 153 | ;-------------------------------------------------------------------- |
---|
[294] | 154 | StartDetectionWithDriveSelectByteInBHandStringInCX: |
---|
| 155 | call DetectPrint_StartDetectWithMasterOrSlaveStringInCXandIdeVarsInCSBP |
---|
[395] | 156 | %ifdef MODULE_HOTKEYS |
---|
[392] | 157 | call HotkeyBar_UpdateDuringDriveDetection |
---|
[395] | 158 | %endif |
---|
[120] | 159 | ; Fall to .ReadAtaInfoFromHardDisk |
---|
[3] | 160 | |
---|
| 161 | ;-------------------------------------------------------------------- |
---|
[120] | 162 | ; .ReadAtaInfoFromHardDisk |
---|
[3] | 163 | ; Parameters: |
---|
| 164 | ; BH: Drive Select byte for Drive and Head Register |
---|
| 165 | ; CS:BP: Ptr to IDEVARS for the drive |
---|
| 166 | ; DS: RAMVARS segment |
---|
| 167 | ; ES: Zero (BDA segment) |
---|
| 168 | ; Returns: |
---|
| 169 | ; CF: Cleared if ATA-information read successfully |
---|
| 170 | ; Set if any error |
---|
| 171 | ; Corrupts registers: |
---|
[150] | 172 | ; AX, BL, CX, DX, SI, DI |
---|
[3] | 173 | ;-------------------------------------------------------------------- |
---|
[120] | 174 | .ReadAtaInfoFromHardDisk: |
---|
[150] | 175 | mov si, BOOTVARS.rgbAtaInfo ; ES:SI now points to ATA info location |
---|
| 176 | push es |
---|
| 177 | push si |
---|
| 178 | push bx |
---|
| 179 | call Device_IdentifyToBufferInESSIwithDriveSelectByteInBH |
---|
| 180 | pop bx |
---|
| 181 | pop si |
---|
| 182 | pop es |
---|
[120] | 183 | jnc SHORT CreateBiosTablesForHardDisk |
---|
| 184 | ; Fall to .ReadAtapiInfoFromDrive |
---|
[3] | 185 | |
---|
[120] | 186 | .ReadAtapiInfoFromDrive: ; Not yet implemented |
---|
| 187 | ;call ReadAtapiInfoFromDrive ; Assume CD-ROM |
---|
| 188 | ;jnc SHORT _CreateBiosTablesForCDROM |
---|
[242] | 189 | |
---|
[203] | 190 | ;jmp short DetectDrives_DriveNotFound |
---|
| 191 | ;;; fall-through instead of previous jmp instruction |
---|
| 192 | ;-------------------------------------------------------------------- |
---|
| 193 | ; DetectDrives_DriveNotFound |
---|
| 194 | ; Parameters: |
---|
| 195 | ; Nothing |
---|
| 196 | ; Returns: |
---|
| 197 | ; CF: Set (from BootMenuPrint_NullTerminatedStringFromCSSIandSetCF) |
---|
| 198 | ; Corrupts registers: |
---|
| 199 | ; AX, SI |
---|
| 200 | ;-------------------------------------------------------------------- |
---|
[242] | 201 | DetectDrives_DriveNotFound: |
---|
[203] | 202 | mov si, g_szNotFound |
---|
[386] | 203 | jmp DetectPrint_NullTerminatedStringFromCSSIandSetCF |
---|
[3] | 204 | |
---|
[120] | 205 | |
---|
[3] | 206 | ;-------------------------------------------------------------------- |
---|
[98] | 207 | ; CreateBiosTablesForHardDisk |
---|
[3] | 208 | ; Parameters: |
---|
| 209 | ; BH: Drive Select byte for Drive and Head Register |
---|
| 210 | ; CS:BP: Ptr to IDEVARS for the drive |
---|
[150] | 211 | ; ES:SI Ptr to ATA information for the drive |
---|
[3] | 212 | ; DS: RAMVARS segment |
---|
[98] | 213 | ; ES: BDA/Bootnfo segment |
---|
[3] | 214 | ; Returns: |
---|
[98] | 215 | ; Nothing |
---|
[3] | 216 | ; Corrupts registers: |
---|
[98] | 217 | ; AX, BX, CX, DX, SI, DI |
---|
[3] | 218 | ;-------------------------------------------------------------------- |
---|
[98] | 219 | CreateBiosTablesForHardDisk: |
---|
[3] | 220 | call CreateDPT_FromAtaInformation |
---|
[196] | 221 | jc SHORT DetectDrives_DriveNotFound |
---|
[254] | 222 | call BootMenuInfo_CreateForHardDisk |
---|
[386] | 223 | jmp SHORT DetectPrint_DriveNameFromBootnfoInESBX |
---|