| 1 | ; Project name : XTIDE Universal BIOS
|
|---|
| 2 | ; Description : Functions for detecting drive for the BIOS.
|
|---|
| 3 |
|
|---|
| 4 | ; Section containing code
|
|---|
| 5 | SECTION .text
|
|---|
| 6 |
|
|---|
| 7 | ;--------------------------------------------------------------------
|
|---|
| 8 | ; Detects all IDE hard disks to be controlled by this BIOS.
|
|---|
| 9 | ;
|
|---|
| 10 | ; DetectDrives_FromAllIDEControllers
|
|---|
| 11 | ; Parameters:
|
|---|
| 12 | ; DS: RAMVARS segment
|
|---|
| 13 | ; ES: BDA segment (zero)
|
|---|
| 14 | ; Returns:
|
|---|
| 15 | ; Nothing
|
|---|
| 16 | ; Corrupts registers:
|
|---|
| 17 | ; All (not segments)
|
|---|
| 18 | ;--------------------------------------------------------------------
|
|---|
| 19 | DetectDrives_FromAllIDEControllers:
|
|---|
| 20 | call RamVars_GetIdeControllerCountToCX
|
|---|
| 21 | mov bp, ROMVARS.ideVars0 ; CS:BP now points to first IDEVARS
|
|---|
| 22 | .DriveDetectLoop:
|
|---|
| 23 | call .DetectDrives_WithIDEVARS ; Detect Master and Slave
|
|---|
| 24 | add bp, BYTE IDEVARS_size ; Point to next IDEVARS
|
|---|
| 25 | loop .DriveDetectLoop
|
|---|
| 26 |
|
|---|
| 27 | %ifdef MODULE_SERIAL
|
|---|
| 28 | test BYTE [es:BDA.bKBFlgs1], 8 ; alt key depressed
|
|---|
| 29 | jz .done
|
|---|
| 30 | mov bp, ROMVARS.ideVarsSerialAuto
|
|---|
| 31 | ;;; fall-through
|
|---|
| 32 | %else
|
|---|
| 33 | ret
|
|---|
| 34 | %endif
|
|---|
| 35 |
|
|---|
| 36 | ;--------------------------------------------------------------------
|
|---|
| 37 | ; Detects IDE hard disks by using information from IDEVARS.
|
|---|
| 38 | ;
|
|---|
| 39 | ; DetectDrives_WithIDEVARS
|
|---|
| 40 | ; Parameters:
|
|---|
| 41 | ; CS:BP: Ptr to IDEVARS
|
|---|
| 42 | ; DS: RAMVARS segment
|
|---|
| 43 | ; ES: Zero (BDA segment)
|
|---|
| 44 | ; Returns:
|
|---|
| 45 | ; Nothing
|
|---|
| 46 | ; Corrupts registers:
|
|---|
| 47 | ; AX, BX, DX, SI, DI
|
|---|
| 48 | ;--------------------------------------------------------------------
|
|---|
| 49 | .DetectDrives_WithIDEVARS:
|
|---|
| 50 | push cx
|
|---|
| 51 | mov ax, g_szMaster
|
|---|
| 52 | mov bh, MASK_DRVNHEAD_SET ; Select Master drive
|
|---|
| 53 | call StartDetectionWithDriveSelectByteInBHandStringInAX ; Detect and create DPT + BOOTNFO
|
|---|
| 54 |
|
|---|
| 55 | mov ax, g_szSlave
|
|---|
| 56 | mov bh, MASK_DRVNHEAD_SET | FLG_DRVNHEAD_DRV
|
|---|
| 57 | call StartDetectionWithDriveSelectByteInBHandStringInAX
|
|---|
| 58 | pop cx
|
|---|
| 59 | .done:
|
|---|
| 60 | ret
|
|---|
| 61 |
|
|---|
| 62 |
|
|---|
| 63 | ;--------------------------------------------------------------------
|
|---|
| 64 | ; StartDetectionWithDriveSelectByteInBHandStringInAX
|
|---|
| 65 | ; Parameters:
|
|---|
| 66 | ; AX: Offset to "Master" or "Slave" string
|
|---|
| 67 | ; BH: Drive Select byte for Drive and Head Register
|
|---|
| 68 | ; CS:BP: Ptr to IDEVARS for the drive
|
|---|
| 69 | ; DS: RAMVARS segment
|
|---|
| 70 | ; ES: Zero (BDA segment)
|
|---|
| 71 | ; Returns:
|
|---|
| 72 | ; Nothing
|
|---|
| 73 | ; Corrupts registers:
|
|---|
| 74 | ; AX, BX, CX, DX, SI, DI
|
|---|
| 75 | ;--------------------------------------------------------------------
|
|---|
| 76 | StartDetectionWithDriveSelectByteInBHandStringInAX:
|
|---|
| 77 | call DetectPrint_StartDetectWithMasterOrSlaveStringInAXandIdeVarsInCSBP
|
|---|
| 78 | ; Fall to .ReadAtaInfoFromHardDisk
|
|---|
| 79 |
|
|---|
| 80 | ;--------------------------------------------------------------------
|
|---|
| 81 | ; .ReadAtaInfoFromHardDisk
|
|---|
| 82 | ; Parameters:
|
|---|
| 83 | ; BH: Drive Select byte for Drive and Head Register
|
|---|
| 84 | ; CS:BP: Ptr to IDEVARS for the drive
|
|---|
| 85 | ; DS: RAMVARS segment
|
|---|
| 86 | ; ES: Zero (BDA segment)
|
|---|
| 87 | ; Returns:
|
|---|
| 88 | ; CF: Cleared if ATA-information read successfully
|
|---|
| 89 | ; Set if any error
|
|---|
| 90 | ; Corrupts registers:
|
|---|
| 91 | ; AX, BL, CX, DX, SI, DI
|
|---|
| 92 | ;--------------------------------------------------------------------
|
|---|
| 93 | .ReadAtaInfoFromHardDisk:
|
|---|
| 94 | mov si, BOOTVARS.rgbAtaInfo ; ES:SI now points to ATA info location
|
|---|
| 95 | push es
|
|---|
| 96 | push si
|
|---|
| 97 | push bx
|
|---|
| 98 | call Device_IdentifyToBufferInESSIwithDriveSelectByteInBH
|
|---|
| 99 | pop bx
|
|---|
| 100 | pop si
|
|---|
| 101 | pop es
|
|---|
| 102 | jnc SHORT CreateBiosTablesForHardDisk
|
|---|
| 103 | ; Fall to .ReadAtapiInfoFromDrive
|
|---|
| 104 |
|
|---|
| 105 | .ReadAtapiInfoFromDrive: ; Not yet implemented
|
|---|
| 106 | ;call ReadAtapiInfoFromDrive ; Assume CD-ROM
|
|---|
| 107 | ;jnc SHORT _CreateBiosTablesForCDROM
|
|---|
| 108 | jmp DetectPrint_DriveNotFound
|
|---|
| 109 |
|
|---|
| 110 |
|
|---|
| 111 | ;--------------------------------------------------------------------
|
|---|
| 112 | ; CreateBiosTablesForHardDisk
|
|---|
| 113 | ; Parameters:
|
|---|
| 114 | ; BH: Drive Select byte for Drive and Head Register
|
|---|
| 115 | ; CS:BP: Ptr to IDEVARS for the drive
|
|---|
| 116 | ; ES:SI Ptr to ATA information for the drive
|
|---|
| 117 | ; DS: RAMVARS segment
|
|---|
| 118 | ; ES: BDA/Bootnfo segment
|
|---|
| 119 | ; Returns:
|
|---|
| 120 | ; Nothing
|
|---|
| 121 | ; Corrupts registers:
|
|---|
| 122 | ; AX, BX, CX, DX, SI, DI
|
|---|
| 123 | ;--------------------------------------------------------------------
|
|---|
| 124 | CreateBiosTablesForHardDisk:
|
|---|
| 125 | call CreateDPT_FromAtaInformation
|
|---|
| 126 | jc SHORT .InvalidAtaInfo
|
|---|
| 127 | call BootInfo_CreateForHardDisk
|
|---|
| 128 | jmp DetectPrint_DriveNameFromBootnfoInESBX
|
|---|
| 129 | .InvalidAtaInfo:
|
|---|
| 130 | jmp DetectPrint_DriveNotFound
|
|---|
