[150] | 1 | ; Project name : XTIDE Universal BIOS |
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[3] | 2 | ; Description : Functions for detecting drive for the BIOS. |
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| 3 | |
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| 4 | ; Section containing code |
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| 5 | SECTION .text |
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| 6 | |
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| 7 | ;-------------------------------------------------------------------- |
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| 8 | ; Detects all IDE hard disks to be controlled by this BIOS. |
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| 9 | ; |
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| 10 | ; DetectDrives_FromAllIDEControllers |
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| 11 | ; Parameters: |
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| 12 | ; DS: RAMVARS segment |
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| 13 | ; ES: BDA segment (zero) |
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| 14 | ; Returns: |
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| 15 | ; Nothing |
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| 16 | ; Corrupts registers: |
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| 17 | ; All (not segments) |
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| 18 | ;-------------------------------------------------------------------- |
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| 19 | DetectDrives_FromAllIDEControllers: |
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[33] | 20 | call RamVars_GetIdeControllerCountToCX |
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[3] | 21 | mov bp, ROMVARS.ideVars0 ; CS:BP now points to first IDEVARS |
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[200] | 22 | |
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| 23 | .DriveDetectLoop: ; Loop through IDEVARS |
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[233] | 24 | push cx |
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| 25 | |
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| 26 | mov cx, g_szDetectMaster |
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| 27 | mov bh, MASK_DRVNHEAD_SET ; Select Master drive |
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| 28 | call StartDetectionWithDriveSelectByteInBHandStringInAX ; Detect and create DPT + BOOTNFO |
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| 29 | |
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| 30 | mov cx, g_szDetectSlave |
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| 31 | mov bh, MASK_DRVNHEAD_SET | FLG_DRVNHEAD_DRV |
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| 32 | call StartDetectionWithDriveSelectByteInBHandStringInAX |
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| 33 | |
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| 34 | pop cx |
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| 35 | |
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| 36 | add bp, BYTE IDEVARS_size ; Point to next IDEVARS |
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| 37 | |
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[203] | 38 | %ifdef MODULE_SERIAL |
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[233] | 39 | jcxz .done ; Set to zero on .ideVarsSerialAuto iteration (if any) |
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[196] | 40 | %endif |
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[233] | 41 | |
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[3] | 42 | loop .DriveDetectLoop |
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[203] | 43 | |
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| 44 | %ifdef MODULE_SERIAL |
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| 45 | ; |
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[233] | 46 | ; if serial drive detected, do not scan (avoids duplicate drives and isn't needed - we already have a connection) |
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[203] | 47 | ; |
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[233] | 48 | call FindDPT_ToDSDIforSerialDevice |
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| 49 | jc .done |
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| 50 | |
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| 51 | mov bp, ROMVARS.ideVarsSerialAuto ; Point to our special IDEVARS sructure, just for serial scans |
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| 52 | |
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[200] | 53 | mov al,[cs:ROMVARS.wFlags] ; Configurator set to always scan? |
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| 54 | or al,[es:BDA.bKBFlgs1] ; Or, did the user hold down the ALT key? |
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| 55 | and al,8 ; 8 = alt key depressed, same as FLG_ROMVARS_SERIAL_ALWAYSDETECT |
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[233] | 56 | jnz .DriveDetectLoop |
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| 57 | %endif |
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[203] | 58 | |
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[233] | 59 | .done: |
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[3] | 60 | ret |
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| 61 | |
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[199] | 62 | %if FLG_ROMVARS_SERIAL_SCANDETECT != 8 |
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[200] | 63 | %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." |
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[199] | 64 | %endif |
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| 65 | |
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[200] | 66 | |
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[3] | 67 | ;-------------------------------------------------------------------- |
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[98] | 68 | ; StartDetectionWithDriveSelectByteInBHandStringInAX |
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[3] | 69 | ; Parameters: |
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| 70 | ; BH: Drive Select byte for Drive and Head Register |
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[233] | 71 | ; CX: Offset to "Master" or "Slave" string |
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[3] | 72 | ; CS:BP: Ptr to IDEVARS for the drive |
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| 73 | ; DS: RAMVARS segment |
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| 74 | ; ES: Zero (BDA segment) |
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| 75 | ; Returns: |
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[203] | 76 | ; None |
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[3] | 77 | ; Corrupts registers: |
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[98] | 78 | ; AX, BX, CX, DX, SI, DI |
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[3] | 79 | ;-------------------------------------------------------------------- |
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[98] | 80 | StartDetectionWithDriveSelectByteInBHandStringInAX: |
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| 81 | call DetectPrint_StartDetectWithMasterOrSlaveStringInAXandIdeVarsInCSBP |
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[120] | 82 | ; Fall to .ReadAtaInfoFromHardDisk |
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[3] | 83 | |
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| 84 | ;-------------------------------------------------------------------- |
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[120] | 85 | ; .ReadAtaInfoFromHardDisk |
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[3] | 86 | ; Parameters: |
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| 87 | ; BH: Drive Select byte for Drive and Head Register |
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| 88 | ; CS:BP: Ptr to IDEVARS for the drive |
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| 89 | ; DS: RAMVARS segment |
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| 90 | ; ES: Zero (BDA segment) |
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| 91 | ; Returns: |
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| 92 | ; CF: Cleared if ATA-information read successfully |
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| 93 | ; Set if any error |
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| 94 | ; Corrupts registers: |
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[150] | 95 | ; AX, BL, CX, DX, SI, DI |
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[3] | 96 | ;-------------------------------------------------------------------- |
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[120] | 97 | .ReadAtaInfoFromHardDisk: |
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[150] | 98 | mov si, BOOTVARS.rgbAtaInfo ; ES:SI now points to ATA info location |
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| 99 | push es |
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| 100 | push si |
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| 101 | push bx |
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| 102 | call Device_IdentifyToBufferInESSIwithDriveSelectByteInBH |
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| 103 | pop bx |
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| 104 | pop si |
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| 105 | pop es |
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[120] | 106 | jnc SHORT CreateBiosTablesForHardDisk |
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| 107 | ; Fall to .ReadAtapiInfoFromDrive |
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[3] | 108 | |
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[120] | 109 | .ReadAtapiInfoFromDrive: ; Not yet implemented |
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| 110 | ;call ReadAtapiInfoFromDrive ; Assume CD-ROM |
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| 111 | ;jnc SHORT _CreateBiosTablesForCDROM |
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[203] | 112 | |
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| 113 | ;jmp short DetectDrives_DriveNotFound |
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| 114 | ;;; fall-through instead of previous jmp instruction |
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| 115 | ;-------------------------------------------------------------------- |
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| 116 | ; DetectDrives_DriveNotFound |
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| 117 | ; Parameters: |
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| 118 | ; Nothing |
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| 119 | ; Returns: |
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| 120 | ; CF: Set (from BootMenuPrint_NullTerminatedStringFromCSSIandSetCF) |
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| 121 | ; Corrupts registers: |
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| 122 | ; AX, SI |
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| 123 | ;-------------------------------------------------------------------- |
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| 124 | DetectDrives_DriveNotFound: |
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| 125 | mov si, g_szNotFound |
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| 126 | jmp BootMenuPrint_NullTerminatedStringFromCSSIandSetCF |
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[3] | 127 | |
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[120] | 128 | |
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[3] | 129 | ;-------------------------------------------------------------------- |
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[98] | 130 | ; CreateBiosTablesForHardDisk |
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[3] | 131 | ; Parameters: |
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| 132 | ; BH: Drive Select byte for Drive and Head Register |
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| 133 | ; CS:BP: Ptr to IDEVARS for the drive |
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[150] | 134 | ; ES:SI Ptr to ATA information for the drive |
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[3] | 135 | ; DS: RAMVARS segment |
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[98] | 136 | ; ES: BDA/Bootnfo segment |
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[3] | 137 | ; Returns: |
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[98] | 138 | ; Nothing |
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[3] | 139 | ; Corrupts registers: |
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[98] | 140 | ; AX, BX, CX, DX, SI, DI |
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[3] | 141 | ;-------------------------------------------------------------------- |
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[98] | 142 | CreateBiosTablesForHardDisk: |
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[3] | 143 | call CreateDPT_FromAtaInformation |
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[196] | 144 | jc SHORT DetectDrives_DriveNotFound |
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[3] | 145 | call BootInfo_CreateForHardDisk |
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[196] | 146 | jmp short DetectPrint_DriveNameFromBootnfoInESBX |
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| 147 | |
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| 148 | |
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