[150] | 1 | ; Project name : XTIDE Universal BIOS |
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| 2 | ; Description : IDE Device wait functions. |
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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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[150] | 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 | ; IdeWait_IRQorDRQ |
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| 25 | ; Parameters: |
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| 26 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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[267] | 27 | ; SS:BP: Ptr to IDEPACK, PIOVARS or MEMPIOVARS |
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[150] | 28 | ; Returns: |
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| 29 | ; AH: INT 13h Error Code |
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| 30 | ; CF: Cleared if success, Set if error |
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| 31 | ; Corrupts registers: |
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| 32 | ; AL, BX, CX, DX |
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| 33 | ;-------------------------------------------------------------------- |
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[238] | 34 | IDEDEVICE%+Wait_IRQorDRQ: |
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[150] | 35 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_DRQ) |
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[238] | 36 | %ifdef ASSEMBLE_SHARED_IDE_DEVICE_FUNCTIONS ; JR-IDE/ISA does not support IRQ |
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[150] | 37 | test BYTE [bp+IDEPACK.bDeviceControl], FLG_DEVCONTROL_nIEN |
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[238] | 38 | jnz SHORT IDEDEVICE%+Wait_PollStatusFlagInBLwithTimeoutInBH ; Interrupt disabled |
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| 39 | %endif |
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[150] | 40 | ; Fall to IdeWait_IRQorStatusFlagInBLwithTimeoutInBH |
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| 41 | |
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| 42 | |
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| 43 | ;-------------------------------------------------------------------- |
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| 44 | ; IdeWait_IRQorStatusFlagInBLwithTimeoutInBH |
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| 45 | ; Parameters: |
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| 46 | ; BH: Timeout ticks |
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| 47 | ; BL: IDE Status Register bit to wait |
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| 48 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 49 | ; Returns: |
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| 50 | ; AH: INT 13h Error Code |
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| 51 | ; CF: Cleared if success, Set if error |
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| 52 | ; Corrupts registers: |
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| 53 | ; AL, BX, CX, DX |
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| 54 | ;-------------------------------------------------------------------- |
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[238] | 55 | IDEDEVICE%+Wait_IRQorStatusFlagInBLwithTimeoutInBH: |
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| 56 | %ifdef ASSEMBLE_SHARED_IDE_DEVICE_FUNCTIONS ; JR-IDE/ISA does not support IRQ |
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[150] | 57 | call IdeIrq_WaitForIRQ |
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[238] | 58 | %endif |
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[150] | 59 | ; Always fall to IdeWait_PollStatusFlagInBLwithTimeoutInBH for error processing |
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| 60 | |
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| 61 | |
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| 62 | ;-------------------------------------------------------------------- |
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| 63 | ; IdeWait_PollStatusFlagInBLwithTimeoutInBH |
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| 64 | ; Parameters: |
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| 65 | ; BH: Timeout ticks |
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| 66 | ; BL: IDE Status Register bit to poll |
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| 67 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 68 | ; Returns: |
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| 69 | ; AH: INT 13h Error Code |
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| 70 | ; CF: Cleared if success, Set if error |
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| 71 | ; Corrupts registers: |
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| 72 | ; AL, BX, CX, DX |
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| 73 | ;-------------------------------------------------------------------- |
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[238] | 74 | IDEDEVICE%+Wait_PollStatusFlagInBLwithTimeoutInBH: |
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[150] | 75 | mov ah, bl |
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[155] | 76 | mov cl, bh |
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| 77 | call Timer_InitializeTimeoutWithTicksInCL |
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[150] | 78 | and ah, ~FLG_STATUS_BSY |
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[238] | 79 | jz SHORT IDEDEVICE%+PollBsyOnly |
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[150] | 80 | ; Fall to PollBsyAndFlgInAH |
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| 81 | |
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| 82 | ;-------------------------------------------------------------------- |
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| 83 | ; PollBsyAndFlgInAH |
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| 84 | ; Parameters: |
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| 85 | ; AH: Status Register Flag to poll (until set) when device not busy |
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| 86 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 87 | ; Returns: |
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| 88 | ; AH: BIOS Error code |
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| 89 | ; CF: Clear if wait completed successfully (no errors) |
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| 90 | ; Set if any error |
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| 91 | ; Corrupts registers: |
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| 92 | ; AL, BX, CX, DX |
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| 93 | ;-------------------------------------------------------------------- |
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[266] | 94 | IDEDEVICE%+PollBsyAndFlgInAH: |
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| 95 | INPUT_TO_AL_FROM_IDE_REGISTER STATUS_REGISTER_in ; Discard contents for first read |
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[150] | 96 | ALIGN JUMP_ALIGN |
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| 97 | .PollLoop: |
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[266] | 98 | INPUT_TO_AL_FROM_IDE_REGISTER STATUS_REGISTER_in |
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[150] | 99 | test al, FLG_STATUS_BSY ; Controller busy? |
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| 100 | jnz SHORT .UpdateTimeout ; If so, jump to timeout update |
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| 101 | test al, ah ; Test secondary flag |
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[238] | 102 | jnz SHORT IDEDEVICE%+Error_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL |
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[150] | 103 | .UpdateTimeout: |
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[155] | 104 | call Timer_SetCFifTimeout |
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[150] | 105 | jnc SHORT .PollLoop ; Loop if time left |
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[238] | 106 | call IDEDEVICE%+Error_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL |
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[150] | 107 | jc SHORT .ReturnErrorCodeInAH |
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| 108 | mov ah, RET_HD_TIMEOUT ; Expected bit never got set |
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| 109 | stc |
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| 110 | .ReturnErrorCodeInAH: |
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| 111 | ret |
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| 112 | |
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| 113 | |
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| 114 | ;-------------------------------------------------------------------- |
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| 115 | ; PollBsyOnly |
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| 116 | ; Parameters: |
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| 117 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 118 | ; Returns: |
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| 119 | ; AH: BIOS Error code |
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| 120 | ; CF: Clear if wait completed successfully (no errors) |
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| 121 | ; Set if any error |
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| 122 | ; Corrupts registers: |
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| 123 | ; AL, BX, CX, DX |
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| 124 | ;-------------------------------------------------------------------- |
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[238] | 125 | IDEDEVICE%+PollBsyOnly: |
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[266] | 126 | INPUT_TO_AL_FROM_IDE_REGISTER STATUS_REGISTER_in ; Discard contents for first read |
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[150] | 127 | ALIGN JUMP_ALIGN |
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| 128 | .PollLoop: |
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[266] | 129 | INPUT_TO_AL_FROM_IDE_REGISTER STATUS_REGISTER_in |
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[150] | 130 | test al, FLG_STATUS_BSY ; Controller busy? |
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[238] | 131 | jz SHORT IDEDEVICE%+Error_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL |
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[155] | 132 | call Timer_SetCFifTimeout ; Update timeout counter |
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[150] | 133 | jnc SHORT .PollLoop ; Loop if time left (sets CF on timeout) |
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[238] | 134 | jmp SHORT IDEDEVICE%+Error_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL |
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