[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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[445] | 6 | ; XTIDE Universal BIOS and Associated Tools |
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[526] | 7 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team. |
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[376] | 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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[445] | 13 | ; |
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[376] | 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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[445] | 17 | ; GNU General Public License for more details. |
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[376] | 18 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html |
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[445] | 19 | ; |
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[376] | 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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[441] | 24 | ;-------------------------------------------------------------------- |
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| 25 | ; AtaID_VerifyFromESSI |
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| 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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[567] | 29 | ; ZF: Set if ATA-ID verified successfully |
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| 30 | ; Cleared if failed to verify ATA-ID |
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[441] | 31 | ; Corrupts registers: |
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| 32 | ; AX, BX, CX |
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| 33 | ;-------------------------------------------------------------------- |
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| 34 | AtaID_VerifyFromESSI: |
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| 35 | ; We cannot start by reading ATA version since the ID might be |
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| 36 | ; corrupted. We start by making sure P-CHS values are valid. |
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| 37 | ; If they are, we assume the ATA ID to be valid. Fortunately we can do |
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[491] | 38 | ; further checking for ATA-5 and later since they contain signature and |
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[441] | 39 | ; checksum bytes. Those are not available for ATA-4 and older. |
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| 40 | |
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| 41 | ; Verify P-CHS cylinders |
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| 42 | mov bx, ATA1.wCylCnt |
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[567] | 43 | mov ax, MAX_VALID_PCHS_CYLINDERS |
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| 44 | call .CompareCHorSfromOffsetBXtoMaxValueInAX |
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[441] | 45 | |
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[445] | 46 | mov bl, ATA1.wHeadCnt & 0FFh |
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[567] | 47 | mov ax, MAX_VALID_PCHS_HEADS |
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| 48 | call .CompareCHorSfromOffsetBXtoMaxValueInAX |
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[441] | 49 | |
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[445] | 50 | mov bl, ATA1.wSPT & 0FFh |
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[567] | 51 | mov al, MAX_VALID_PCHS_SECTORS_PER_TRACK |
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| 52 | call .CompareCHorSfromOffsetBXtoMaxValueInAX |
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[441] | 53 | |
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[487] | 54 | ; Check signature byte. It is only found on ATA-5 and later. It should be zero on |
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| 55 | ; ATA-4 and older. |
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| 56 | mov al, [es:si+ATA6.bSignature] |
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| 57 | test al, al |
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| 58 | jz SHORT .AtaIDverifiedSuccessfully ; Old ATA so Signature and Checksum is not available |
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| 59 | cmp al, A6_wIntegrity_SIGNATURE |
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[441] | 60 | jne SHORT .FailedToVerifyAtaID |
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| 61 | |
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[487] | 62 | ; Check checksum byte since signature was present |
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[441] | 63 | mov cx, ATA6_size |
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[567] | 64 | jmp Memory_SumCXbytesFromESSItoAL ; Returns with ZF set according to result |
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[441] | 65 | |
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| 66 | ;-------------------------------------------------------------------- |
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[567] | 67 | ; .CompareCHorSfromOffsetBXtoMaxValueInAX |
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[441] | 68 | ; Parameters: |
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[567] | 69 | ; AX: Maximum valid C, H or S value |
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[441] | 70 | ; BX: C, H or S offset to ATA-ID |
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| 71 | ; ES:SI: Ptr to 512-byte ATA information read from the drive |
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| 72 | ; Returns: |
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[567] | 73 | ; Exits from AtaID_VerifyFromESSI with ZF cleared if invalid value |
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[441] | 74 | ; Corrupts registers: |
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[567] | 75 | ; CX |
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[441] | 76 | ;-------------------------------------------------------------------- |
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[567] | 77 | .CompareCHorSfromOffsetBXtoMaxValueInAX: |
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| 78 | mov cx, [es:bx+si] |
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| 79 | jcxz .InvalidPCHorSinOffsetBX |
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| 80 | cmp cx, ax ; Compare to max valid value |
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[441] | 81 | jbe SHORT .ValidPCHorSinOffsetBX |
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| 82 | .InvalidPCHorSinOffsetBX: |
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[567] | 83 | pop cx ; Clear return address for this function |
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| 84 | inc cx ; Clear ZF to indicate invalid ATA-ID (safe to do since return address in CX will never be FFFFh) |
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| 85 | .AtaIDverifiedSuccessfully: |
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[441] | 86 | .FailedToVerifyAtaID: |
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| 87 | .ValidPCHorSinOffsetBX: |
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| 88 | ret |
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| 89 | |
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| 90 | |
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[542] | 91 | ;-------------------------------------------------------------------- |
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| 92 | ; Writes user defined limits from ROMVARS to ATA ID read from the drive. |
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[567] | 93 | ; Modifying the ATA ID reduces code and possibilities for bugs since |
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| 94 | ; only little further checks are needed elsewhere. |
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[542] | 95 | ; |
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| 96 | ; AtaID_ModifyESSIforUserDefinedLimitsAndReturnTranslateModeInDX |
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| 97 | ; Parameters: |
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| 98 | ; DS:DI: Ptr to incomplete Disk Parameter Table |
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| 99 | ; ES:SI: Ptr to 512-byte ATA information read from the drive |
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| 100 | ; CS:BP: Ptr to IDEVARS for the controller |
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| 101 | ; Returns: |
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| 102 | ; DX: User defined P-CHS to L-CHS translate mode |
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| 103 | ; Corrupts registers: |
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| 104 | ; AX, BX, CX |
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| 105 | ;-------------------------------------------------------------------- |
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| 106 | AtaID_ModifyESSIforUserDefinedLimitsAndReturnTranslateModeInDX: |
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| 107 | call AccessDPT_GetPointerToDRVPARAMStoCSBX |
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| 108 | push ds |
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| 109 | push es |
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| 110 | pop ds ; DS:SI now points to ATA information |
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| 111 | |
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| 112 | ; Load User Defined CHS or LBA to CX:AX |
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| 113 | mov dx, [cs:bx+DRVPARAMS.wFlags] |
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| 114 | mov ax, [cs:bx+DRVPARAMS.wCylinders] ; Or .dwMaximumLBA |
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| 115 | mov cx, [cs:bx+DRVPARAMS.wHeadsAndSectors] ; Or .dwMaximumLBA+2 |
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| 116 | |
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| 117 | ; * User defined CHS * |
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| 118 | test dl, FLG_DRVPARAMS_USERCHS |
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| 119 | jz SHORT .NoUserDefinedCHS |
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| 120 | |
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| 121 | ; Apply new CHS and disable LBA (we also want to set CHS addressing) |
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| 122 | mov [si+ATA1.wCylCnt], ax |
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| 123 | eMOVZX ax, cl |
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| 124 | mov [si+ATA1.wHeadCnt], ax |
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| 125 | mov al, ch |
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| 126 | mov [si+ATA1.wSPT], ax |
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| 127 | and BYTE [si+ATA1.wCaps+1], ~(A1_wCaps_LBA>>8) |
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| 128 | and BYTE [si+ATA6.wSetSup83+1], ~(A6_wSetSup83_LBA48>>8) |
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| 129 | .NoUserDefinedCHS: |
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| 130 | |
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| 131 | ; * User defined LBA * |
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| 132 | test dl, FLG_DRVPARAMS_USERLBA |
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| 133 | jz SHORT .NoUserDefinedLBA |
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| 134 | |
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| 135 | ; Apply new LBA and disable LBA48 |
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| 136 | cmp cx, [si+ATA1.dwLBACnt+2] |
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| 137 | ja SHORT .NoUserDefinedLBA ; Do not set larger than drive |
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| 138 | jb SHORT .StoreNewLBA |
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| 139 | cmp ax, [si+ATA1.dwLBACnt] |
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| 140 | ja SHORT .NoUserDefinedLBA ; Allow same size to disable LBA48 |
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| 141 | .StoreNewLBA: |
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| 142 | mov [si+ATA1.dwLBACnt], ax |
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| 143 | mov [si+ATA1.dwLBACnt+2], cx |
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| 144 | and BYTE [si+ATA6.wSetSup83+1], ~(A6_wSetSup83_LBA48>>8) |
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| 145 | .NoUserDefinedLBA: |
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| 146 | |
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| 147 | ; * Load P-CHS to L-CHS translate mode to DX * |
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| 148 | and dx, BYTE MASK_DRVPARAMS_TRANSLATEMODE |
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| 149 | eSHR_IM dx, TRANSLATEMODE_FIELD_POSITION |
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| 150 | |
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| 151 | pop ds |
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| 152 | ret |
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| 153 | |
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| 154 | |
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[363] | 155 | %ifdef MODULE_ADVANCED_ATA |
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| 156 | ;-------------------------------------------------------------------- |
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[364] | 157 | ; AtaID_GetMaxPioModeToAXandMinCycleTimeToCX |
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[363] | 158 | ; Parameters: |
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| 159 | ; ES:SI: Ptr to 512-byte ATA information read from the drive |
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| 160 | ; Returns: |
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[364] | 161 | ; AL: Max supported PIO mode |
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| 162 | ; AH: FLGH_DPT_IORDY if IORDY supported, zero otherwise |
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| 163 | ; CX: Minimum Cycle Time in nanosecs |
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[363] | 164 | ; Corrupts registers: |
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| 165 | ; BX |
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| 166 | ;-------------------------------------------------------------------- |
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[364] | 167 | AtaID_GetMaxPioModeToAXandMinCycleTimeToCX: |
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[363] | 168 | ; Get PIO mode and cycle time for PIO 0...2 |
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| 169 | mov bx, [es:si+ATA1.bPioMode] |
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[370] | 170 | mov ax, bx ; AH = 0, AL = PIO mode 0, 1 or 2 |
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[445] | 171 | eSHL_IM bx, 1 ; Shift for WORD lookup |
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[364] | 172 | mov cx, [cs:bx+.rgwPio0to2CycleTimeInNanosecs] |
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[363] | 173 | |
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[364] | 174 | ; Check if IORDY is supported |
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| 175 | test BYTE [es:si+ATA2.wCaps+1], A2_wCaps_IORDY >> 8 |
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| 176 | jz SHORT .ReturnPioTimings ; No PIO 3 or higher if no IORDY |
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| 177 | mov ah, FLGH_DPT_IORDY |
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| 178 | |
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[363] | 179 | ; Check if Advanced PIO modes are supported (3 and above) |
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| 180 | test BYTE [es:si+ATA2.wFields], A2_wFields_64to70 |
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| 181 | jz SHORT .ReturnPioTimings |
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| 182 | |
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| 183 | ; Get Advanced PIO mode |
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[364] | 184 | ; (Hard Disks supports up to 4 but CF cards can support 5 and 6) |
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[370] | 185 | mov bl, [es:si+ATA2.bPIOSupp] |
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[363] | 186 | .CheckNextFlag: |
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| 187 | inc ax |
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[370] | 188 | shr bl, 1 |
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[363] | 189 | jnz SHORT .CheckNextFlag |
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[364] | 190 | MIN_U al, 6 ; Make sure not above lookup tables |
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| 191 | mov cx, [es:si+ATA2.wPIOMinCyF] ; Advanced modes use IORDY |
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[363] | 192 | .ReturnPioTimings: |
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| 193 | ret |
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| 194 | |
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| 195 | .rgwPio0to2CycleTimeInNanosecs: |
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| 196 | dw PIO_0_MIN_CYCLE_TIME_NS |
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| 197 | dw PIO_1_MIN_CYCLE_TIME_NS |
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| 198 | dw PIO_2_MIN_CYCLE_TIME_NS |
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| 199 | |
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| 200 | |
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| 201 | ;-------------------------------------------------------------------- |
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[364] | 202 | ; AtaID_GetRecoveryTimeToAXfromPioModeInBXandCycleTimeInCX |
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[363] | 203 | ; Parameters: |
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[364] | 204 | ; BX: PIO Mode |
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| 205 | ; CX: PIO Cycle Time in nanosecs |
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[363] | 206 | ; Returns: |
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[364] | 207 | ; AX: Active Time in nanosecs |
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[363] | 208 | ; Corrupts registers: |
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[364] | 209 | ; BX, CX |
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[363] | 210 | ;-------------------------------------------------------------------- |
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[364] | 211 | AtaID_GetRecoveryTimeToAXfromPioModeInBXandCycleTimeInCX: |
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| 212 | call AtaID_GetActiveTimeToAXfromPioModeInBX |
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| 213 | mov bl, [cs:bx+.rgbPioModeToAddressValidTimeNs] |
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| 214 | sub cx, bx ; Cycle Time (t0) - Address Valid Time (t1) |
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| 215 | sub cx, ax ; - Active Time (t2) |
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| 216 | xchg ax, cx ; AX = Recovery Time (t2i) |
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[363] | 217 | ret |
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| 218 | |
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| 219 | .rgbPioModeToAddressValidTimeNs: |
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| 220 | db PIO_0_MIN_ADDRESS_VALID_NS |
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| 221 | db PIO_1_MIN_ADDRESS_VALID_NS |
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| 222 | db PIO_2_MIN_ADDRESS_VALID_NS |
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| 223 | db PIO_3_MIN_ADDRESS_VALID_NS |
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| 224 | db PIO_4_MIN_ADDRESS_VALID_NS |
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[364] | 225 | db PIO_5_MIN_ADDRESS_VALID_NS |
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| 226 | db PIO_6_MIN_ADDRESS_VALID_NS |
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[363] | 227 | |
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[364] | 228 | |
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| 229 | ;-------------------------------------------------------------------- |
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| 230 | ; AtaID_GetActiveTimeToAXfromPioModeInBX |
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| 231 | ; Parameters: |
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| 232 | ; BX: PIO Mode |
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| 233 | ; Returns: |
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| 234 | ; AX: Active Time in nanosecs |
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| 235 | ; Corrupts registers: |
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| 236 | ; Nothing |
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| 237 | ;-------------------------------------------------------------------- |
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| 238 | AtaID_GetActiveTimeToAXfromPioModeInBX: |
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[445] | 239 | eMOVZX ax, [cs:bx+.rgbPioModeToActiveTimeNs] |
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[364] | 240 | ret |
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| 241 | |
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[445] | 242 | .rgbPioModeToActiveTimeNs: |
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| 243 | db PIO_0_MIN_ACTIVE_TIME_NS |
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| 244 | db PIO_1_MIN_ACTIVE_TIME_NS |
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| 245 | db PIO_2_MIN_ACTIVE_TIME_NS |
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| 246 | db PIO_3_MIN_ACTIVE_TIME_NS |
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| 247 | db PIO_4_MIN_ACTIVE_TIME_NS |
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| 248 | db PIO_5_MIN_ACTIVE_TIME_NS |
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| 249 | db PIO_6_MIN_ACTIVE_TIME_NS |
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[363] | 250 | |
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| 251 | %endif ; MODULE_ADVANCED_ATA |
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