[99] | 1 | ; Project name : XTIDE Universal BIOS |
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[3] | 2 | ; Description : Functions for accessing ATA information read with |
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| 3 | ; IDENTIFY DEVICE command. |
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| 4 | |
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[376] | 5 | ; |
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| 6 | ; XTIDE Universal BIOS and Associated Tools |
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| 7 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2012 by XTIDE Universal BIOS Team. |
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| 8 | ; |
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| 9 | ; This program is free software; you can redistribute it and/or modify |
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| 10 | ; it under the terms of the GNU General Public License as published by |
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| 11 | ; the Free Software Foundation; either version 2 of the License, or |
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| 12 | ; (at your option) any later version. |
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| 13 | ; |
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| 14 | ; This program is distributed in the hope that it will be useful, |
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| 15 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 17 | ; GNU General Public License for more details. |
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| 18 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html |
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| 19 | ; |
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| 20 | |
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[3] | 21 | ; Section containing code |
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| 22 | SECTION .text |
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| 23 | |
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| 24 | ;-------------------------------------------------------------------- |
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[169] | 25 | ; AtaID_GetPCHStoAXBLBHfromAtaInfoInESSI |
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[3] | 26 | ; Parameters: |
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| 27 | ; ES:SI: Ptr to 512-byte ATA information read from the drive |
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| 28 | ; Returns: |
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| 29 | ; AX: Number of user specified P-CHS cylinders |
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[99] | 30 | ; BH: Number of user specified P-CHS sectors per track |
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| 31 | ; BL: Number of user specified P-CHS heads |
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[3] | 32 | ; Corrupts registers: |
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| 33 | ; Nothing |
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| 34 | ;-------------------------------------------------------------------- |
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[169] | 35 | AtaID_GetPCHStoAXBLBHfromAtaInfoInESSI: |
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[3] | 36 | mov ax, [es:si+ATA1.wCylCnt] ; Cylinders (1...16383) |
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[99] | 37 | mov bl, [es:si+ATA1.wHeadCnt] ; Heads (1...16) |
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| 38 | mov bh, [es:si+ATA1.wSPT] ; Sectors per Track (1...63) |
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[3] | 39 | ret |
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| 40 | |
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| 41 | |
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| 42 | ;-------------------------------------------------------------------- |
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[165] | 43 | ; AtaID_GetTotalSectorCountToBXDXAXfromAtaInfoInESSI |
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[3] | 44 | ; Parameters: |
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| 45 | ; ES:SI: Ptr to 512-byte ATA information read from the drive |
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| 46 | ; Returns: |
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| 47 | ; BX:DX:AX: 48-bit sector count |
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| 48 | ; Corrupts registers: |
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| 49 | ; Nothing |
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| 50 | ;-------------------------------------------------------------------- |
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[165] | 51 | AtaID_GetTotalSectorCountToBXDXAXfromAtaInfoInESSI: |
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[181] | 52 | mov bx, Registers_ExchangeDSSIwithESDI |
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| 53 | call bx ; ATA info now in DS:DI |
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| 54 | push bx ; We will return via Registers_ExchangeDSSIwithESDI |
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[3] | 55 | xor bx, bx |
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[173] | 56 | test BYTE [di+ATA1.wCaps+1], A1_wCaps_LBA>>8 |
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[99] | 57 | jz SHORT .GetChsSectorCount |
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| 58 | ; Fall to .GetLbaSectorCount |
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[3] | 59 | |
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| 60 | ;-------------------------------------------------------------------- |
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[99] | 61 | ; .GetLbaSectorCount |
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[173] | 62 | ; .GetLba28SectorCount |
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| 63 | ; .GetChsSectorCount |
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[3] | 64 | ; Parameters: |
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| 65 | ; BX: Zero |
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[181] | 66 | ; DS:DI: Ptr to 512-byte ATA information read from the drive |
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[3] | 67 | ; Returns: |
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| 68 | ; BX:DX:AX: 48-bit sector count |
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| 69 | ; Corrupts registers: |
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| 70 | ; Nothing |
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| 71 | ;-------------------------------------------------------------------- |
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[99] | 72 | .GetLbaSectorCount: |
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[411] | 73 | %ifdef MODULE_EBIOS |
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[173] | 74 | test BYTE [di+ATA6.wSetSup83+1], A6_wSetSup83_LBA48>>8 |
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[3] | 75 | jz SHORT .GetLba28SectorCount |
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[411] | 76 | |
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| 77 | ; Get LBA48 sector count |
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[173] | 78 | mov ax, [di+ATA6.qwLBACnt] |
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| 79 | mov dx, [di+ATA6.qwLBACnt+2] |
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| 80 | mov bx, [di+ATA6.qwLBACnt+4] |
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[181] | 81 | ret |
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[411] | 82 | %endif |
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[173] | 83 | |
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[3] | 84 | .GetLba28SectorCount: |
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[173] | 85 | mov ax, [di+ATA1.dwLBACnt] |
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| 86 | mov dx, [di+ATA1.dwLBACnt+2] |
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[181] | 87 | ret |
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[3] | 88 | |
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[99] | 89 | .GetChsSectorCount: |
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[173] | 90 | mov al, [di+ATA1.wSPT] ; AL=Sectors per track |
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| 91 | mul BYTE [di+ATA1.wHeadCnt] ; AX=Sectors per track * number of heads |
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| 92 | mul WORD [di+ATA1.wCylCnt] ; DX:AX=Sectors per track * number of heads * number of cylinders |
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[181] | 93 | ret |
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[363] | 94 | |
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| 95 | |
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| 96 | %ifdef MODULE_ADVANCED_ATA |
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| 97 | ;-------------------------------------------------------------------- |
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[364] | 98 | ; AtaID_GetMaxPioModeToAXandMinCycleTimeToCX |
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[363] | 99 | ; Parameters: |
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| 100 | ; ES:SI: Ptr to 512-byte ATA information read from the drive |
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| 101 | ; Returns: |
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[364] | 102 | ; AL: Max supported PIO mode |
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| 103 | ; AH: FLGH_DPT_IORDY if IORDY supported, zero otherwise |
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| 104 | ; CX: Minimum Cycle Time in nanosecs |
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[363] | 105 | ; Corrupts registers: |
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| 106 | ; BX |
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| 107 | ;-------------------------------------------------------------------- |
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[364] | 108 | AtaID_GetMaxPioModeToAXandMinCycleTimeToCX: |
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[363] | 109 | ; Get PIO mode and cycle time for PIO 0...2 |
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| 110 | mov bx, [es:si+ATA1.bPioMode] |
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[370] | 111 | mov ax, bx ; AH = 0, AL = PIO mode 0, 1 or 2 |
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[363] | 112 | shl bx, 1 ; Shift for WORD lookup |
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[364] | 113 | mov cx, [cs:bx+.rgwPio0to2CycleTimeInNanosecs] |
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[363] | 114 | |
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[364] | 115 | ; Check if IORDY is supported |
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| 116 | test BYTE [es:si+ATA2.wCaps+1], A2_wCaps_IORDY >> 8 |
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| 117 | jz SHORT .ReturnPioTimings ; No PIO 3 or higher if no IORDY |
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| 118 | mov ah, FLGH_DPT_IORDY |
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| 119 | |
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[363] | 120 | ; Check if Advanced PIO modes are supported (3 and above) |
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| 121 | test BYTE [es:si+ATA2.wFields], A2_wFields_64to70 |
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| 122 | jz SHORT .ReturnPioTimings |
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| 123 | |
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| 124 | ; Get Advanced PIO mode |
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[364] | 125 | ; (Hard Disks supports up to 4 but CF cards can support 5 and 6) |
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[370] | 126 | mov bl, [es:si+ATA2.bPIOSupp] |
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[363] | 127 | .CheckNextFlag: |
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| 128 | inc ax |
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[370] | 129 | shr bl, 1 |
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[363] | 130 | jnz SHORT .CheckNextFlag |
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[364] | 131 | MIN_U al, 6 ; Make sure not above lookup tables |
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| 132 | mov cx, [es:si+ATA2.wPIOMinCyF] ; Advanced modes use IORDY |
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[363] | 133 | .ReturnPioTimings: |
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| 134 | ret |
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| 135 | |
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| 136 | .rgwPio0to2CycleTimeInNanosecs: |
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| 137 | dw PIO_0_MIN_CYCLE_TIME_NS |
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| 138 | dw PIO_1_MIN_CYCLE_TIME_NS |
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| 139 | dw PIO_2_MIN_CYCLE_TIME_NS |
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| 140 | |
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| 141 | |
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| 142 | ;-------------------------------------------------------------------- |
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[364] | 143 | ; AtaID_GetRecoveryTimeToAXfromPioModeInBXandCycleTimeInCX |
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[363] | 144 | ; Parameters: |
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[364] | 145 | ; BX: PIO Mode |
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| 146 | ; CX: PIO Cycle Time in nanosecs |
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[363] | 147 | ; Returns: |
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[364] | 148 | ; AX: Active Time in nanosecs |
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[363] | 149 | ; Corrupts registers: |
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[364] | 150 | ; BX, CX |
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[363] | 151 | ;-------------------------------------------------------------------- |
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[364] | 152 | AtaID_GetRecoveryTimeToAXfromPioModeInBXandCycleTimeInCX: |
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| 153 | call AtaID_GetActiveTimeToAXfromPioModeInBX |
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| 154 | mov bl, [cs:bx+.rgbPioModeToAddressValidTimeNs] |
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| 155 | sub cx, bx ; Cycle Time (t0) - Address Valid Time (t1) |
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| 156 | sub cx, ax ; - Active Time (t2) |
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| 157 | xchg ax, cx ; AX = Recovery Time (t2i) |
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[363] | 158 | ret |
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| 159 | |
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| 160 | .rgbPioModeToAddressValidTimeNs: |
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| 161 | db PIO_0_MIN_ADDRESS_VALID_NS |
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| 162 | db PIO_1_MIN_ADDRESS_VALID_NS |
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| 163 | db PIO_2_MIN_ADDRESS_VALID_NS |
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| 164 | db PIO_3_MIN_ADDRESS_VALID_NS |
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| 165 | db PIO_4_MIN_ADDRESS_VALID_NS |
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[364] | 166 | db PIO_5_MIN_ADDRESS_VALID_NS |
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| 167 | db PIO_6_MIN_ADDRESS_VALID_NS |
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[363] | 168 | |
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[364] | 169 | |
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| 170 | ;-------------------------------------------------------------------- |
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| 171 | ; AtaID_GetActiveTimeToAXfromPioModeInBX |
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| 172 | ; Parameters: |
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| 173 | ; BX: PIO Mode |
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| 174 | ; Returns: |
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| 175 | ; AX: Active Time in nanosecs |
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| 176 | ; Corrupts registers: |
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| 177 | ; Nothing |
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| 178 | ;-------------------------------------------------------------------- |
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| 179 | AtaID_GetActiveTimeToAXfromPioModeInBX: |
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| 180 | shl bx, 1 |
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| 181 | mov ax, [cs:bx+.rgwPioModeToActiveTimeNs] |
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| 182 | shr bx, 1 |
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| 183 | ret |
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| 184 | |
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[363] | 185 | .rgwPioModeToActiveTimeNs: |
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| 186 | dw PIO_0_MIN_ACTIVE_TIME_NS |
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| 187 | dw PIO_1_MIN_ACTIVE_TIME_NS |
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| 188 | dw PIO_2_MIN_ACTIVE_TIME_NS |
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| 189 | dw PIO_3_MIN_ACTIVE_TIME_NS |
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| 190 | dw PIO_4_MIN_ACTIVE_TIME_NS |
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[364] | 191 | dw PIO_5_MIN_ACTIVE_TIME_NS |
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| 192 | dw PIO_6_MIN_ACTIVE_TIME_NS |
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[363] | 193 | |
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| 194 | %endif ; MODULE_ADVANCED_ATA |
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