| 1 | ; Project name : XTIDE Universal BIOS
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| 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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| 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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| 21 | ; Section containing code
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| 22 | SECTION .text
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| 23 |
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| 24 | %ifdef MODULE_ADVANCED_ATA
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| 25 | ;--------------------------------------------------------------------
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| 26 | ; AtaID_GetMaxPioModeToAXandMinCycleTimeToCX
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| 27 | ; Parameters:
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| 28 | ; ES:SI: Ptr to 512-byte ATA information read from the drive
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| 29 | ; Returns:
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| 30 | ; AL: Max supported PIO mode
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| 31 | ; AH: FLGH_DPT_IORDY if IORDY supported, zero otherwise
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| 32 | ; CX: Minimum Cycle Time in nanosecs
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| 33 | ; Corrupts registers:
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| 34 | ; BX
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| 35 | ;--------------------------------------------------------------------
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| 36 | AtaID_GetMaxPioModeToAXandMinCycleTimeToCX:
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| 37 | ; Get PIO mode and cycle time for PIO 0...2
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| 38 | mov bx, [es:si+ATA1.bPioMode]
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| 39 | mov ax, bx ; AH = 0, AL = PIO mode 0, 1 or 2
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| 40 | shl bx, 1 ; Shift for WORD lookup
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| 41 | mov cx, [cs:bx+.rgwPio0to2CycleTimeInNanosecs]
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| 42 |
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| 43 | ; Check if IORDY is supported
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| 44 | test BYTE [es:si+ATA2.wCaps+1], A2_wCaps_IORDY >> 8
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| 45 | jz SHORT .ReturnPioTimings ; No PIO 3 or higher if no IORDY
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| 46 | mov ah, FLGH_DPT_IORDY
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| 47 |
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| 48 | ; Check if Advanced PIO modes are supported (3 and above)
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| 49 | test BYTE [es:si+ATA2.wFields], A2_wFields_64to70
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| 50 | jz SHORT .ReturnPioTimings
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| 51 |
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| 52 | ; Get Advanced PIO mode
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| 53 | ; (Hard Disks supports up to 4 but CF cards can support 5 and 6)
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| 54 | mov bl, [es:si+ATA2.bPIOSupp]
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| 55 | .CheckNextFlag:
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| 56 | inc ax
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| 57 | shr bl, 1
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| 58 | jnz SHORT .CheckNextFlag
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| 59 | MIN_U al, 6 ; Make sure not above lookup tables
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| 60 | mov cx, [es:si+ATA2.wPIOMinCyF] ; Advanced modes use IORDY
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| 61 | .ReturnPioTimings:
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| 62 | ret
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| 63 |
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| 64 | .rgwPio0to2CycleTimeInNanosecs:
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| 65 | dw PIO_0_MIN_CYCLE_TIME_NS
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| 66 | dw PIO_1_MIN_CYCLE_TIME_NS
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| 67 | dw PIO_2_MIN_CYCLE_TIME_NS
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| 68 |
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| 69 |
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| 70 | ;--------------------------------------------------------------------
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| 71 | ; AtaID_GetRecoveryTimeToAXfromPioModeInBXandCycleTimeInCX
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| 72 | ; Parameters:
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| 73 | ; BX: PIO Mode
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| 74 | ; CX: PIO Cycle Time in nanosecs
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| 75 | ; Returns:
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| 76 | ; AX: Active Time in nanosecs
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| 77 | ; Corrupts registers:
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| 78 | ; BX, CX
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| 79 | ;--------------------------------------------------------------------
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| 80 | AtaID_GetRecoveryTimeToAXfromPioModeInBXandCycleTimeInCX:
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| 81 | call AtaID_GetActiveTimeToAXfromPioModeInBX
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| 82 | mov bl, [cs:bx+.rgbPioModeToAddressValidTimeNs]
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| 83 | sub cx, bx ; Cycle Time (t0) - Address Valid Time (t1)
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| 84 | sub cx, ax ; - Active Time (t2)
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| 85 | xchg ax, cx ; AX = Recovery Time (t2i)
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| 86 | ret
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| 87 |
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| 88 | .rgbPioModeToAddressValidTimeNs:
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| 89 | db PIO_0_MIN_ADDRESS_VALID_NS
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| 90 | db PIO_1_MIN_ADDRESS_VALID_NS
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| 91 | db PIO_2_MIN_ADDRESS_VALID_NS
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| 92 | db PIO_3_MIN_ADDRESS_VALID_NS
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| 93 | db PIO_4_MIN_ADDRESS_VALID_NS
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| 94 | db PIO_5_MIN_ADDRESS_VALID_NS
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| 95 | db PIO_6_MIN_ADDRESS_VALID_NS
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| 96 |
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| 97 |
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| 98 | ;--------------------------------------------------------------------
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| 99 | ; AtaID_GetActiveTimeToAXfromPioModeInBX
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| 100 | ; Parameters:
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| 101 | ; BX: PIO Mode
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| 102 | ; Returns:
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| 103 | ; AX: Active Time in nanosecs
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| 104 | ; Corrupts registers:
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| 105 | ; Nothing
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| 106 | ;--------------------------------------------------------------------
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| 107 | AtaID_GetActiveTimeToAXfromPioModeInBX:
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| 108 | shl bx, 1
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| 109 | mov ax, [cs:bx+.rgwPioModeToActiveTimeNs]
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| 110 | shr bx, 1
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| 111 | ret
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| 112 |
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| 113 | .rgwPioModeToActiveTimeNs:
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| 114 | dw PIO_0_MIN_ACTIVE_TIME_NS
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| 115 | dw PIO_1_MIN_ACTIVE_TIME_NS
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| 116 | dw PIO_2_MIN_ACTIVE_TIME_NS
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| 117 | dw PIO_3_MIN_ACTIVE_TIME_NS
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| 118 | dw PIO_4_MIN_ACTIVE_TIME_NS
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| 119 | dw PIO_5_MIN_ACTIVE_TIME_NS
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| 120 | dw PIO_6_MIN_ACTIVE_TIME_NS
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| 121 |
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| 122 | %endif ; MODULE_ADVANCED_ATA
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