[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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| 152 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_MOTOR_STARTUP, FLG_STATUS_BSY) |
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| 153 | jmp IdeWait_PollStatusFlagInBLwithTimeoutInBH |
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