[99] | 1 | ; Project name : XTIDE Universal BIOS |
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[3] | 2 | ; Description : Defines for DPT structs containing custom |
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| 3 | ; Disk Parameter Table used by this BIOS. |
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| 4 | %ifndef CUSTOMDPT_INC |
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| 5 | %define CUSTOMDPT_INC |
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| 6 | |
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[150] | 7 | ; Base DPT for all device types |
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[173] | 8 | struc DPT ; 10 bytes |
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[3] | 9 | ; General Disk Parameter Table related |
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[158] | 10 | .wFlags: |
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| 11 | .bFlagsLow resb 1 |
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| 12 | .bFlagsHigh resb 1 |
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[150] | 13 | .bIdevarsOffset resb 1 ; Offset to IDEVARS for this drive |
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[3] | 14 | |
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[150] | 15 | ; IDE Drive related |
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[238] | 16 | ; .bLbaHeads and .twLbaSectors are used for LBA addressing only. |
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[237] | 17 | .bLbaHeads: resb 1 ; Number of LBA assisted heads (1...255) |
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[227] | 18 | .twLbaSectors resb 2 ; 48-bit sector count for LBA addressing |
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[238] | 19 | |
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| 20 | ; .wPchsCylinders and .bPchsSectors are used for CHS addressing only. |
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[227] | 21 | .wPchsCylinders resb 2 ; Number of P-CHS Cylinders (1...16383) |
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| 22 | .wPchsHeadsAndSectors: |
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| 23 | .bPchsHeads resb 1 ; Number of P-CHS heads (1...16) |
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| 24 | .bPchsSectors resb 1 ; Number of P-CHS Sectors per Track (1...63) |
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[150] | 25 | endstruc |
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[3] | 26 | |
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[158] | 27 | ; Bit definitions for DPT.bFlagsLow |
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| 28 | MASKL_DPT_CHS_SHIFT_COUNT EQU (7<<0) ; Bits 0...3, P-CHS to L-CHS bit shift count (0...4) |
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| 29 | FLGL_DPT_SLAVE EQU FLG_DRVNHEAD_DRV ; (1<<4), Drive is slave drive |
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| 30 | MASKL_DPT_ADDRESSING_MODE EQU (3<<5) ; Bits 5..6, Addressing Mode (bit 6 == FLG_DRVNHEAD_LBA) |
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| 31 | FLGL_DPT_ENABLE_IRQ EQU (1<<7) |
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[3] | 32 | |
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[158] | 33 | ; Bit definitions for DPT.bFlagsHigh |
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| 34 | FLGH_DPT_REVERSED_A0_AND_A3 EQU (1<<0) ; XTIDE mod, Address lines 0 and 3 reversed |
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[165] | 35 | FLGH_DPT_BLOCK_MODE_SUPPORTED EQU (1<<1) ; Use block transfer commands (must be bit 1!) |
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[175] | 36 | %ifdef MODULE_SERIAL |
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[165] | 37 | FLGH_DPT_SERIAL_DEVICE EQU (1<<2) ; Serial Port Device |
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[175] | 38 | %endif |
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[158] | 39 | FLGH_DPT_INTERRUPT_IN_SERVICE EQU (1<<3) ; Set when waiting for IRQ |
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| 40 | |
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[363] | 41 | ; IDE device only |
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[364] | 42 | %ifdef MODULE_ADVANCED_ATA |
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[365] | 43 | FLGH_DPT_IORDY EQU (1<<7) ; Controller and Drive supports IORDY |
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[364] | 44 | %endif |
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[363] | 45 | |
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| 46 | ; Serial device only |
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[258] | 47 | FLGH_DPT_SERIAL_FLOPPY EQU (1<<4) |
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| 48 | FLGH_DPT_SERIAL_FLOPPY_TYPE_MASK EQU 0e0h |
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| 49 | FLGH_DPT_SERIAL_FLOPPY_TYPE_FIELD_POSITION EQU 5 |
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| 50 | |
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[150] | 51 | ; Addressing modes for DPT.wFlags |
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| 52 | ADDRESSING_MODE_FIELD_POSITION EQU 5 |
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| 53 | ADDRESSING_MODE_LCHS EQU 0 ; L-CHS Addressing Mode (NORMAL in many other BIOSes) |
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| 54 | ADDRESSING_MODE_PCHS EQU 1 ; P-CHS Addressing Mode (LARGE in many other BIOSes) |
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| 55 | ADDRESSING_MODE_LBA28 EQU 2 ; 28-bit LBA Addressing Mode |
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| 56 | ADDRESSING_MODE_LBA48 EQU 3 ; 48-bit LBA Addressing Mode |
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[3] | 57 | |
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[363] | 58 | |
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| 59 | ; DPT for ATA devices |
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| 60 | struc DPT_ATA ; 10 + 2 bytes = 12 bytes |
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| 61 | .dpt resb DPT_size |
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[365] | 62 | .bBlockSize resb 1 ; Current block size in sectors (do not set to zero!) |
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| 63 | .bInitError resb 1 |
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[363] | 64 | endstruc |
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| 65 | |
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[365] | 66 | ; Flags for BOOTMENUINFO.wInitErrorFlags |
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| 67 | FLG_INITERROR_FAILED_TO_SELECT_DRIVE EQU (1<<0) |
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| 68 | FLG_INITERROR_FAILED_TO_INITIALIZE_CHS_PARAMETERS EQU (1<<1) |
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| 69 | FLG_INITERROR_FAILED_TO_SET_WRITE_CACHE EQU (1<<2) |
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| 70 | FLG_INITERROR_FAILED_TO_RECALIBRATE_DRIVE EQU (1<<3) |
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| 71 | FLG_INITERROR_FAILED_TO_SET_BLOCK_MODE EQU (1<<4) |
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| 72 | FLG_INITERROR_FAILED_TO_SET_PIO_MODE EQU (1<<5) |
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[363] | 73 | |
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[365] | 74 | |
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[364] | 75 | ; Additional variables needed to initialize and reset Advanced IDE Controllers. |
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| 76 | ; EBDA must be reserved for DPTs when using these! |
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[363] | 77 | %ifdef MODULE_ADVANCED_ATA |
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| 78 | struc DPT_ADVANCED_ATA |
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| 79 | .dpt_ata resb DPT_ATA_size |
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[364] | 80 | .wControllerID resb 2 ; Controller specific ID WORD (from Advanced Controller detection) |
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[363] | 81 | .wControllerBasePort resb 2 ; Advanced Controller port (not IDE port) |
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[364] | 82 | .wMinPioCycleTime resb 2 ; Minimum PIO Cycle Time in ns |
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| 83 | .bPioMode resb 1 ; Best supported PIO mode |
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| 84 | .bDevice resb 1 ; Device Type from IDEVARS (overrided when 32-bit controller detected) |
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[363] | 85 | endstruc |
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| 86 | %endif |
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| 87 | |
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| 88 | |
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[364] | 89 | ; DPT for Serial devices |
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[363] | 90 | %ifdef MODULE_SERIAL |
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| 91 | struc DPT_SERIAL |
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| 92 | .dpt resb DPT_size |
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| 93 | .wSerialPortAndBaud: |
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| 94 | .bSerialPort resb 1 ; Serial connection I/O port address, divided by 4 |
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| 95 | .bSerialBaud resb 1 ; Serial connection baud rate divisor |
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| 96 | endstruc |
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| 97 | %endif |
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| 98 | |
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| 99 | |
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| 100 | ; This is the common size for all DPTs. All DPTs must be equal size. |
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[364] | 101 | %ifdef MODULE_ADVANCED_ATA |
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| 102 | LARGEST_DPT_SIZE EQU DPT_ADVANCED_ATA_size |
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| 103 | %else |
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[363] | 104 | LARGEST_DPT_SIZE EQU DPT_ATA_size |
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[364] | 105 | %endif |
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[363] | 106 | |
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| 107 | |
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[173] | 108 | ; Number of Sectors per Track is fixed to 63 for LBA assist calculation. |
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| 109 | ; 1024 cylinders, 256 heads, 63 sectors = 8.4 GB limit (but DOS does not support more than 255 heads) |
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| 110 | MAX_LCHS_CYLINDERS EQU 1024 |
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| 111 | LBA_ASSIST_SPT EQU 63 |
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[3] | 112 | |
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[173] | 113 | |
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[358] | 114 | ;-------------------------------------------------------------------- |
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| 115 | ; LIMIT_LBA_CYLINDERS_IN_DXAX_TO_LCHS_CYLINDERS |
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| 116 | ; Parameters: |
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| 117 | ; DX:AX: Number of LBA cylinders |
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| 118 | ; Returns: |
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| 119 | ; AX: Number of L-CHS cylinders |
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| 120 | ; Corrupts registers: |
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| 121 | ; Nothing |
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| 122 | ;-------------------------------------------------------------------- |
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| 123 | %macro LIMIT_LBA_CYLINDERS_IN_DXAX_TO_LCHS_CYLINDERS 0 |
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| 124 | test dx, dx |
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| 125 | jnz SHORT %%LoadMaxValueToAX |
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| 126 | cmp ax, MAX_LCHS_CYLINDERS |
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[370] | 127 | jb SHORT %%NoNeedToModify |
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[358] | 128 | %%LoadMaxValueToAX: |
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| 129 | mov ax, MAX_LCHS_CYLINDERS |
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| 130 | %%NoNeedToModify: |
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| 131 | %endmacro |
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| 132 | |
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| 133 | |
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[3] | 134 | %endif ; CUSTOMDPT_INC |
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