[88] | 1 | ; Project name : XTIDE Universal BIOS
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[3] | 2 | ; Description : Int 13h function AH=Dh, Reset Hard Disk (Alternate reset).
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| 3 |
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[376] | 4 | ;
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| 5 | ; XTIDE Universal BIOS and Associated Tools
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| 6 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2012 by XTIDE Universal BIOS Team.
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| 7 | ;
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| 8 | ; This program is free software; you can redistribute it and/or modify
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| 9 | ; it under the terms of the GNU General Public License as published by
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| 10 | ; the Free Software Foundation; either version 2 of the License, or
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| 11 | ; (at your option) any later version.
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| 12 | ;
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| 13 | ; This program is distributed in the hope that it will be useful,
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| 14 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 15 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 16 | ; GNU General Public License for more details.
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| 17 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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| 18 | ;
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| 19 |
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[3] | 20 | ; Section containing code
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| 21 | SECTION .text
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| 22 |
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| 23 | ;--------------------------------------------------------------------
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| 24 | ; Int 13h function AH=Dh, Reset Hard Disk (Alternate reset).
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| 25 | ;
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| 26 | ; AHDh_HandlerForResetHardDisk
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| 27 | ; Parameters:
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[148] | 28 | ; DL: Translated Drive number
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| 29 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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[150] | 30 | ; SS:BP: Ptr to IDEPACK
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| 31 | ; Returns with INTPACK:
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[3] | 32 | ; AH: Int 13h return status
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[294] | 33 | ; CF: 0 if successful, 1 if error
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[3] | 34 | ;--------------------------------------------------------------------
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| 35 | AHDh_HandlerForResetHardDisk:
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[84] | 36 | %ifndef USE_186
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[3] | 37 | call AHDh_ResetDrive
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[148] | 38 | jmp Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
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[84] | 39 | %else
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[148] | 40 | push Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
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[162] | 41 | ; Fall to AHDh_ResetDrive
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[84] | 42 | %endif
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[3] | 43 |
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| 44 |
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| 45 | ;--------------------------------------------------------------------
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| 46 | ; Resets hard disk.
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| 47 | ;
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| 48 | ; AHDh_ResetDrive
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| 49 | ; Parameters:
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[271] | 50 | ; DS:DI: Ptr to DPT
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[150] | 51 | ; SS:BP: Ptr to IDEPACK
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[3] | 52 | ; Returns:
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| 53 | ; AH: Int 13h return status
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[294] | 54 | ; CF: 0 if successful, 1 if error
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[3] | 55 | ; Corrupts registers:
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[271] | 56 | ; AL, SI
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[3] | 57 | ;--------------------------------------------------------------------
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| 58 | AHDh_ResetDrive:
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[26] | 59 | push dx
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[271] | 60 | push cx
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[26] | 61 | push bx
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[262] | 62 | push di
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[26] | 63 |
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[398] | 64 | %ifdef MODULE_IRQ
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[33] | 65 | call Interrupts_UnmaskInterruptControllerForDriveInDSDI
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[398] | 66 | %endif
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[150] | 67 | call Device_ResetMasterAndSlaveController
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[262] | 68 | ;jc SHORT .ReturnError ; CF would be set if slave drive present without master
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| 69 | ; (error register has special values after reset)
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[3] | 70 |
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| 71 | ; Initialize Master and Slave drives
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[370] | 72 | eMOVZX ax, [di+DPT.bIdevarsOffset] ; (AL) pointer to controller we are looking to reset
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[294] | 73 | ; (AH) initialize error code, assume success
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| 74 |
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[363] | 75 | mov si, IterateAndResetDrives ; Callback function for FindDPT_IterateAllDPTs
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[271] | 76 | call FindDPT_IterateAllDPTs
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[26] | 77 |
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[262] | 78 | shr ah, 1 ; Move error code and CF into proper position
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| 79 |
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| 80 | pop di
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[26] | 81 | pop bx
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[271] | 82 | pop cx
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[26] | 83 | pop dx
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[3] | 84 | ret
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| 85 |
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| 86 | ;--------------------------------------------------------------------
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[262] | 87 | ; IterateAndResetDrives: Iteration routine for use with IterateAllDPTs.
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| 88 | ;
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[294] | 89 | ; When a drive on the controller is found, it is reset, and the error code
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[262] | 90 | ; merged into overall error code for this controller. Master will be reset
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| 91 | ; first. Note that the iteration will go until the end of the DPT list.
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[363] | 92 | ;
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| 93 | ; Parameters:
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| 94 | ; AL: Offset to IDEVARS for drives to initialize
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| 95 | ; AH: Error status from previous initialization
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| 96 | ; DS:DI: Ptr to DPT to examine
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| 97 | ; Returns:
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| 98 | ; AH: Error status from initialization
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| 99 | ; CF: Set to iterate all DPTs
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| 100 | ; Corrupts registers:
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| 101 | ; AL, BX, DX
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[3] | 102 | ;--------------------------------------------------------------------
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[262] | 103 | IterateAndResetDrives:
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| 104 | cmp al, [di+DPT.bIdevarsOffset] ; The right controller?
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[370] | 105 | jne .Done
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| 106 | push cx
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[262] | 107 | push ax
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[428] | 108 | call AHDh_WaitUnilDriveMotorHasReachedFullSpeed
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| 109 | call AH9h_InitializeDriveForUse ; Initialize Master or Slave (Master will come first in DPT list)
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[363] | 110 |
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| 111 | %ifdef MODULE_ADVANCED_ATA
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| 112 | jc SHORT .SkipControllerInitSinceError
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[370] | 113 | ; Here we initialize the more advanced controllers (VLB and PCI) to get better performance for systems with 32-bit bus.
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| 114 | ; This step is optional since the controllers use slowest possible settings by default if they are not initialized.
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| 115 |
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| 116 | pop ax
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| 117 | push ax
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| 118 | cmp al, [di+LARGEST_DPT_SIZE+DPT.bIdevarsOffset] ; We check if next DPT is for the same IDE controller.
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| 119 | je SHORT .SkipInitializationUntilNextDrive ; If it is, we skip the initialization.
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| 120 | call AdvAtaInit_InitializeControllerForDPTinDSDI ; Done after drive init so drives are first set to advanced PIO mode, then the controller
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| 121 | .SkipInitializationUntilNextDrive:
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[363] | 122 | .SkipControllerInitSinceError:
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[370] | 123 | %endif ; MODULE_ADVANCED_ATA
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[363] | 124 |
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[370] | 125 | pop ax
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[363] | 126 | pop cx
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[370] | 127 | jnc .Done
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[262] | 128 | or ah, (RET_HD_RESETFAIL << 1) | 1 ; OR in Reset Failed error code and CF, will SHR into position later
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[370] | 129 | .Done:
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[271] | 130 | stc ; From IterateAllDPTs perspective, the DPT is never found (continue iteration)
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[3] | 131 | ret
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[363] | 132 |
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[428] | 133 |
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| 134 | ;--------------------------------------------------------------------
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| 135 | ; AHDh_WaitUnilDriveMotorHasReachedFullSpeed
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| 136 | ; Parameters:
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| 137 | ; DS:DI: Ptr to DPT
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| 138 | ; Returns:
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| 139 | ; AH: Int 13h return status
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| 140 | ; CF: 0 if successful, 1 if error
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| 141 | ; Corrupts registers:
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| 142 | ; AL, BX, CX, DX
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| 143 | ;--------------------------------------------------------------------
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| 144 | AHDh_WaitUnilDriveMotorHasReachedFullSpeed:
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| 145 | %ifdef MODULE_SERIAL
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| 146 | test BYTE [di+DPT.bFlagsHigh], FLGH_DPT_SERIAL_DEVICE
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| 147 | jz SHORT .WaitSinceRealHardDisk
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| 148 | ret
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| 149 | .WaitSinceRealHardDisk:
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| 150 | %endif
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| 151 |
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[429] | 152 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_MOTOR_STARTUP, FLG_STATUS_DRDY)
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[428] | 153 | jmp IdeWait_PollStatusFlagInBLwithTimeoutInBH
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