[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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[491] | 5 | ; XTIDE Universal BIOS and Associated Tools |
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[526] | 6 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team. |
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[376] | 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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[491] | 12 | ; |
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[376] | 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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[491] | 16 | ; GNU General Public License for more details. |
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[376] | 17 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html |
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[491] | 18 | ; |
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[376] | 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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[400] | 34 | IdeWait_IRQorDRQ: |
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[150] | 35 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_DRQ) |
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[400] | 36 | |
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| 37 | %ifdef MODULE_IRQ |
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[150] | 38 | test BYTE [bp+IDEPACK.bDeviceControl], FLG_DEVCONTROL_nIEN |
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[400] | 39 | jnz SHORT IdeWait_PollStatusFlagInBLwithTimeoutInBH ; Interrupt disabled |
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[238] | 40 | %endif |
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[150] | 41 | ; Fall to IdeWait_IRQorStatusFlagInBLwithTimeoutInBH |
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| 42 | |
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| 43 | |
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| 44 | ;-------------------------------------------------------------------- |
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| 45 | ; IdeWait_IRQorStatusFlagInBLwithTimeoutInBH |
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| 46 | ; Parameters: |
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| 47 | ; BH: Timeout ticks |
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| 48 | ; BL: IDE Status Register bit to wait |
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| 49 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 50 | ; Returns: |
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| 51 | ; AH: INT 13h Error Code |
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| 52 | ; CF: Cleared if success, Set if error |
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| 53 | ; Corrupts registers: |
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| 54 | ; AL, BX, CX, DX |
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| 55 | ;-------------------------------------------------------------------- |
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[400] | 56 | IdeWait_IRQorStatusFlagInBLwithTimeoutInBH: |
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| 57 | %ifdef MODULE_IRQ |
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| 58 | call IdeIrq_WaitForIRQ |
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[238] | 59 | %endif |
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[150] | 60 | ; Always fall to IdeWait_PollStatusFlagInBLwithTimeoutInBH for error processing |
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| 61 | |
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| 62 | |
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| 63 | ;-------------------------------------------------------------------- |
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| 64 | ; IdeWait_PollStatusFlagInBLwithTimeoutInBH |
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| 65 | ; Parameters: |
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| 66 | ; BH: Timeout ticks |
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| 67 | ; BL: IDE Status Register bit to poll |
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| 68 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 69 | ; Returns: |
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| 70 | ; AH: INT 13h Error Code |
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| 71 | ; CF: Cleared if success, Set if error |
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| 72 | ; Corrupts registers: |
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| 73 | ; AL, BX, CX, DX |
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| 74 | ;-------------------------------------------------------------------- |
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[400] | 75 | IdeWait_PollStatusFlagInBLwithTimeoutInBH: |
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[150] | 76 | mov ah, bl |
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[155] | 77 | mov cl, bh |
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| 78 | call Timer_InitializeTimeoutWithTicksInCL |
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[150] | 79 | and ah, ~FLG_STATUS_BSY |
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[400] | 80 | jz SHORT PollBsyOnly |
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[150] | 81 | ; Fall to PollBsyAndFlgInAH |
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| 82 | |
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| 83 | ;-------------------------------------------------------------------- |
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| 84 | ; PollBsyAndFlgInAH |
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| 85 | ; Parameters: |
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| 86 | ; AH: Status Register Flag to poll (until set) when device not busy |
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| 87 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 88 | ; Returns: |
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| 89 | ; AH: BIOS Error code |
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| 90 | ; CF: Clear if wait completed successfully (no errors) |
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| 91 | ; Set if any error |
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| 92 | ; Corrupts registers: |
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| 93 | ; AL, BX, CX, DX |
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| 94 | ;-------------------------------------------------------------------- |
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[491] | 95 | PollBsyAndFlgInAH: |
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[400] | 96 | call IdeIO_InputStatusRegisterToAL ; Discard contents of first read |
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| 97 | |
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[150] | 98 | .PollLoop: |
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[400] | 99 | call IdeIO_InputStatusRegisterToAL |
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[150] | 100 | test al, FLG_STATUS_BSY ; Controller busy? |
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| 101 | jnz SHORT .UpdateTimeout ; If so, jump to timeout update |
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| 102 | test al, ah ; Test secondary flag |
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[400] | 103 | jnz SHORT IdeError_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL |
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[150] | 104 | .UpdateTimeout: |
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[155] | 105 | call Timer_SetCFifTimeout |
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[150] | 106 | jnc SHORT .PollLoop ; Loop if time left |
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[400] | 107 | call IdeError_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL |
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[150] | 108 | jc SHORT .ReturnErrorCodeInAH |
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| 109 | mov ah, RET_HD_TIMEOUT ; Expected bit never got set |
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| 110 | stc |
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| 111 | .ReturnErrorCodeInAH: |
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| 112 | ret |
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| 113 | |
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| 114 | |
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| 115 | ;-------------------------------------------------------------------- |
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| 116 | ; PollBsyOnly |
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| 117 | ; Parameters: |
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| 118 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 119 | ; Returns: |
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| 120 | ; AH: BIOS Error code |
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| 121 | ; CF: Clear if wait completed successfully (no errors) |
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| 122 | ; Set if any error |
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| 123 | ; Corrupts registers: |
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| 124 | ; AL, BX, CX, DX |
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| 125 | ;-------------------------------------------------------------------- |
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[400] | 126 | PollBsyOnly: |
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| 127 | call IdeIO_InputStatusRegisterToAL ; Discard contents of first read |
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| 128 | |
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[150] | 129 | .PollLoop: |
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[400] | 130 | call IdeIO_InputStatusRegisterToAL |
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[150] | 131 | test al, FLG_STATUS_BSY ; Controller busy? |
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[400] | 132 | jz SHORT IdeError_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL |
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[155] | 133 | call Timer_SetCFifTimeout ; Update timeout counter |
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[150] | 134 | jnc SHORT .PollLoop ; Loop if time left (sets CF on timeout) |
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[400] | 135 | jmp SHORT IdeError_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL |
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