[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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[580] | 34 | %ifndef NO_ATAID_VALIDATION |
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[441] | 35 | AtaID_VerifyFromESSI: |
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| 36 | ; We cannot start by reading ATA version since the ID might be |
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| 37 | ; corrupted. We start by making sure P-CHS values are valid. |
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| 38 | ; If they are, we assume the ATA ID to be valid. Fortunately we can do |
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[491] | 39 | ; further checking for ATA-5 and later since they contain signature and |
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[441] | 40 | ; checksum bytes. Those are not available for ATA-4 and older. |
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| 41 | |
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| 42 | ; Verify P-CHS cylinders |
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| 43 | mov bx, ATA1.wCylCnt |
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[567] | 44 | mov ax, MAX_VALID_PCHS_CYLINDERS |
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| 45 | call .CompareCHorSfromOffsetBXtoMaxValueInAX |
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[441] | 46 | |
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[445] | 47 | mov bl, ATA1.wHeadCnt & 0FFh |
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[567] | 48 | mov ax, MAX_VALID_PCHS_HEADS |
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| 49 | call .CompareCHorSfromOffsetBXtoMaxValueInAX |
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[441] | 50 | |
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[445] | 51 | mov bl, ATA1.wSPT & 0FFh |
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[567] | 52 | mov al, MAX_VALID_PCHS_SECTORS_PER_TRACK |
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| 53 | call .CompareCHorSfromOffsetBXtoMaxValueInAX |
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[441] | 54 | |
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[487] | 55 | ; Check signature byte. It is only found on ATA-5 and later. It should be zero on |
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| 56 | ; ATA-4 and older. |
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| 57 | mov al, [es:si+ATA6.bSignature] |
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| 58 | test al, al |
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| 59 | jz SHORT .AtaIDverifiedSuccessfully ; Old ATA so Signature and Checksum is not available |
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| 60 | cmp al, A6_wIntegrity_SIGNATURE |
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[441] | 61 | jne SHORT .FailedToVerifyAtaID |
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| 62 | |
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[487] | 63 | ; Check checksum byte since signature was present |
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[441] | 64 | mov cx, ATA6_size |
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[567] | 65 | jmp Memory_SumCXbytesFromESSItoAL ; Returns with ZF set according to result |
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[441] | 66 | |
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| 67 | ;-------------------------------------------------------------------- |
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[567] | 68 | ; .CompareCHorSfromOffsetBXtoMaxValueInAX |
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[441] | 69 | ; Parameters: |
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[567] | 70 | ; AX: Maximum valid C, H or S value |
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[441] | 71 | ; BX: C, H or S offset to ATA-ID |
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| 72 | ; ES:SI: Ptr to 512-byte ATA information read from the drive |
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| 73 | ; Returns: |
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[567] | 74 | ; Exits from AtaID_VerifyFromESSI with ZF cleared if invalid value |
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[441] | 75 | ; Corrupts registers: |
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[567] | 76 | ; CX |
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[441] | 77 | ;-------------------------------------------------------------------- |
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[567] | 78 | .CompareCHorSfromOffsetBXtoMaxValueInAX: |
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| 79 | mov cx, [es:bx+si] |
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| 80 | jcxz .InvalidPCHorSinOffsetBX |
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| 81 | cmp cx, ax ; Compare to max valid value |
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[441] | 82 | jbe SHORT .ValidPCHorSinOffsetBX |
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| 83 | .InvalidPCHorSinOffsetBX: |
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[567] | 84 | pop cx ; Clear return address for this function |
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| 85 | 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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| 86 | .AtaIDverifiedSuccessfully: |
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[441] | 87 | .FailedToVerifyAtaID: |
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| 88 | .ValidPCHorSinOffsetBX: |
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| 89 | ret |
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[580] | 90 | %endif ; NO_ATAID_VALIDATION |
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[441] | 91 | |
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| 92 | |
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[542] | 93 | ;-------------------------------------------------------------------- |
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| 94 | ; Writes user defined limits from ROMVARS to ATA ID read from the drive. |
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[567] | 95 | ; Modifying the ATA ID reduces code and possibilities for bugs since |
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| 96 | ; only little further checks are needed elsewhere. |
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[542] | 97 | ; |
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| 98 | ; AtaID_ModifyESSIforUserDefinedLimitsAndReturnTranslateModeInDX |
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| 99 | ; Parameters: |
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| 100 | ; DS:DI: Ptr to incomplete Disk Parameter Table |
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| 101 | ; ES:SI: Ptr to 512-byte ATA information read from the drive |
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| 102 | ; CS:BP: Ptr to IDEVARS for the controller |
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| 103 | ; Returns: |
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| 104 | ; DX: User defined P-CHS to L-CHS translate mode |
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| 105 | ; Corrupts registers: |
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| 106 | ; AX, BX, CX |
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| 107 | ;-------------------------------------------------------------------- |
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| 108 | AtaID_ModifyESSIforUserDefinedLimitsAndReturnTranslateModeInDX: |
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| 109 | call AccessDPT_GetPointerToDRVPARAMStoCSBX |
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| 110 | push ds |
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[568] | 111 | |
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| 112 | push cs |
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| 113 | pop ds |
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| 114 | |
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| 115 | ; Load User Defined CHS or LBA to CX:AX |
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| 116 | mov dx, [bx+DRVPARAMS.wFlags] |
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| 117 | mov ax, [bx+DRVPARAMS.wCylinders] ; Or .dwMaximumLBA |
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| 118 | mov cx, [bx+DRVPARAMS.wHeadsAndSectors] ; Or .dwMaximumLBA+2 |
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| 119 | |
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[542] | 120 | push es |
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| 121 | pop ds ; DS:SI now points to ATA information |
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| 122 | |
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| 123 | ; * User defined CHS * |
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| 124 | test dl, FLG_DRVPARAMS_USERCHS |
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| 125 | jz SHORT .NoUserDefinedCHS |
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| 126 | |
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| 127 | ; Apply new CHS and disable LBA (we also want to set CHS addressing) |
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| 128 | mov [si+ATA1.wCylCnt], ax |
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| 129 | eMOVZX ax, cl |
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| 130 | mov [si+ATA1.wHeadCnt], ax |
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| 131 | mov al, ch |
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| 132 | mov [si+ATA1.wSPT], ax |
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| 133 | and BYTE [si+ATA1.wCaps+1], ~(A1_wCaps_LBA>>8) |
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| 134 | and BYTE [si+ATA6.wSetSup83+1], ~(A6_wSetSup83_LBA48>>8) |
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| 135 | .NoUserDefinedCHS: |
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| 136 | |
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| 137 | ; * User defined LBA * |
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| 138 | test dl, FLG_DRVPARAMS_USERLBA |
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| 139 | jz SHORT .NoUserDefinedLBA |
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| 140 | |
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| 141 | ; Apply new LBA and disable LBA48 |
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| 142 | cmp cx, [si+ATA1.dwLBACnt+2] |
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| 143 | ja SHORT .NoUserDefinedLBA ; Do not set larger than drive |
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| 144 | jb SHORT .StoreNewLBA |
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| 145 | cmp ax, [si+ATA1.dwLBACnt] |
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| 146 | ja SHORT .NoUserDefinedLBA ; Allow same size to disable LBA48 |
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| 147 | .StoreNewLBA: |
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| 148 | mov [si+ATA1.dwLBACnt], ax |
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| 149 | mov [si+ATA1.dwLBACnt+2], cx |
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| 150 | and BYTE [si+ATA6.wSetSup83+1], ~(A6_wSetSup83_LBA48>>8) |
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| 151 | .NoUserDefinedLBA: |
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| 152 | |
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| 153 | ; * Load P-CHS to L-CHS translate mode to DX * |
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| 154 | and dx, BYTE MASK_DRVPARAMS_TRANSLATEMODE |
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| 155 | eSHR_IM dx, TRANSLATEMODE_FIELD_POSITION |
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| 156 | |
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| 157 | pop ds |
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| 158 | ret |
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| 159 | |
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| 160 | |
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[363] | 161 | %ifdef MODULE_ADVANCED_ATA |
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| 162 | ;-------------------------------------------------------------------- |
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[364] | 163 | ; AtaID_GetMaxPioModeToAXandMinCycleTimeToCX |
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[363] | 164 | ; Parameters: |
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| 165 | ; ES:SI: Ptr to 512-byte ATA information read from the drive |
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| 166 | ; Returns: |
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[364] | 167 | ; AL: Max supported PIO mode |
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| 168 | ; AH: FLGH_DPT_IORDY if IORDY supported, zero otherwise |
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| 169 | ; CX: Minimum Cycle Time in nanosecs |
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[363] | 170 | ; Corrupts registers: |
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| 171 | ; BX |
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| 172 | ;-------------------------------------------------------------------- |
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[364] | 173 | AtaID_GetMaxPioModeToAXandMinCycleTimeToCX: |
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[363] | 174 | ; Get PIO mode and cycle time for PIO 0...2 |
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| 175 | mov bx, [es:si+ATA1.bPioMode] |
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[370] | 176 | mov ax, bx ; AH = 0, AL = PIO mode 0, 1 or 2 |
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[445] | 177 | eSHL_IM bx, 1 ; Shift for WORD lookup |
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[364] | 178 | mov cx, [cs:bx+.rgwPio0to2CycleTimeInNanosecs] |
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[363] | 179 | |
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[364] | 180 | ; Check if IORDY is supported |
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| 181 | test BYTE [es:si+ATA2.wCaps+1], A2_wCaps_IORDY >> 8 |
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| 182 | jz SHORT .ReturnPioTimings ; No PIO 3 or higher if no IORDY |
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| 183 | mov ah, FLGH_DPT_IORDY |
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| 184 | |
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[363] | 185 | ; Check if Advanced PIO modes are supported (3 and above) |
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| 186 | test BYTE [es:si+ATA2.wFields], A2_wFields_64to70 |
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| 187 | jz SHORT .ReturnPioTimings |
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| 188 | |
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| 189 | ; Get Advanced PIO mode |
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[364] | 190 | ; (Hard Disks supports up to 4 but CF cards can support 5 and 6) |
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[370] | 191 | mov bl, [es:si+ATA2.bPIOSupp] |
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[363] | 192 | .CheckNextFlag: |
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| 193 | inc ax |
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[370] | 194 | shr bl, 1 |
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[363] | 195 | jnz SHORT .CheckNextFlag |
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[364] | 196 | MIN_U al, 6 ; Make sure not above lookup tables |
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| 197 | mov cx, [es:si+ATA2.wPIOMinCyF] ; Advanced modes use IORDY |
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[363] | 198 | .ReturnPioTimings: |
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| 199 | ret |
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| 200 | |
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| 201 | .rgwPio0to2CycleTimeInNanosecs: |
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| 202 | dw PIO_0_MIN_CYCLE_TIME_NS |
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| 203 | dw PIO_1_MIN_CYCLE_TIME_NS |
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| 204 | dw PIO_2_MIN_CYCLE_TIME_NS |
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| 205 | |
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| 206 | |
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| 207 | ;-------------------------------------------------------------------- |
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[364] | 208 | ; AtaID_GetRecoveryTimeToAXfromPioModeInBXandCycleTimeInCX |
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[363] | 209 | ; Parameters: |
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[364] | 210 | ; BX: PIO Mode |
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| 211 | ; CX: PIO Cycle Time in nanosecs |
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[363] | 212 | ; Returns: |
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[364] | 213 | ; AX: Active Time in nanosecs |
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[363] | 214 | ; Corrupts registers: |
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[364] | 215 | ; BX, CX |
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[363] | 216 | ;-------------------------------------------------------------------- |
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[364] | 217 | AtaID_GetRecoveryTimeToAXfromPioModeInBXandCycleTimeInCX: |
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| 218 | call AtaID_GetActiveTimeToAXfromPioModeInBX |
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| 219 | mov bl, [cs:bx+.rgbPioModeToAddressValidTimeNs] |
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| 220 | sub cx, bx ; Cycle Time (t0) - Address Valid Time (t1) |
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| 221 | sub cx, ax ; - Active Time (t2) |
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| 222 | xchg ax, cx ; AX = Recovery Time (t2i) |
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[363] | 223 | ret |
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| 224 | |
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| 225 | .rgbPioModeToAddressValidTimeNs: |
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| 226 | db PIO_0_MIN_ADDRESS_VALID_NS |
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| 227 | db PIO_1_MIN_ADDRESS_VALID_NS |
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| 228 | db PIO_2_MIN_ADDRESS_VALID_NS |
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| 229 | db PIO_3_MIN_ADDRESS_VALID_NS |
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| 230 | db PIO_4_MIN_ADDRESS_VALID_NS |
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[364] | 231 | db PIO_5_MIN_ADDRESS_VALID_NS |
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| 232 | db PIO_6_MIN_ADDRESS_VALID_NS |
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[363] | 233 | |
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[364] | 234 | |
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| 235 | ;-------------------------------------------------------------------- |
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| 236 | ; AtaID_GetActiveTimeToAXfromPioModeInBX |
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| 237 | ; Parameters: |
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| 238 | ; BX: PIO Mode |
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| 239 | ; Returns: |
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| 240 | ; AX: Active Time in nanosecs |
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| 241 | ; Corrupts registers: |
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| 242 | ; Nothing |
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| 243 | ;-------------------------------------------------------------------- |
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| 244 | AtaID_GetActiveTimeToAXfromPioModeInBX: |
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[445] | 245 | eMOVZX ax, [cs:bx+.rgbPioModeToActiveTimeNs] |
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[364] | 246 | ret |
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| 247 | |
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[445] | 248 | .rgbPioModeToActiveTimeNs: |
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| 249 | db PIO_0_MIN_ACTIVE_TIME_NS |
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| 250 | db PIO_1_MIN_ACTIVE_TIME_NS |
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| 251 | db PIO_2_MIN_ACTIVE_TIME_NS |
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| 252 | db PIO_3_MIN_ACTIVE_TIME_NS |
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| 253 | db PIO_4_MIN_ACTIVE_TIME_NS |
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| 254 | db PIO_5_MIN_ACTIVE_TIME_NS |
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| 255 | db PIO_6_MIN_ACTIVE_TIME_NS |
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[363] | 256 | |
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| 257 | %endif ; MODULE_ADVANCED_ATA |
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