| [150] | 1 | ; Project name : XTIDE Universal BIOS
|
|---|
| 2 | ; Description : IDE Device wait functions.
|
|---|
| 3 |
|
|---|
| [376] | 4 | ;
|
|---|
| 5 | ; XTIDE Universal BIOS and Associated Tools
|
|---|
| 6 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2012 by XTIDE Universal BIOS Team.
|
|---|
| 7 | ;
|
|---|
| 8 | ; This program is free software; you can redistribute it and/or modify
|
|---|
| 9 | ; it under the terms of the GNU General Public License as published by
|
|---|
| 10 | ; the Free Software Foundation; either version 2 of the License, or
|
|---|
| 11 | ; (at your option) any later version.
|
|---|
| 12 | ;
|
|---|
| 13 | ; This program is distributed in the hope that it will be useful,
|
|---|
| 14 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|---|
| 15 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|---|
| 16 | ; GNU General Public License for more details.
|
|---|
| 17 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
|
|---|
| 18 | ;
|
|---|
| 19 |
|
|---|
| [150] | 20 | ; Section containing code
|
|---|
| 21 | SECTION .text
|
|---|
| 22 |
|
|---|
| 23 | ;--------------------------------------------------------------------
|
|---|
| 24 | ; IdeWait_IRQorDRQ
|
|---|
| 25 | ; Parameters:
|
|---|
| 26 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
|
|---|
| [267] | 27 | ; SS:BP: Ptr to IDEPACK, PIOVARS or MEMPIOVARS
|
|---|
| [150] | 28 | ; Returns:
|
|---|
| 29 | ; AH: INT 13h Error Code
|
|---|
| 30 | ; CF: Cleared if success, Set if error
|
|---|
| 31 | ; Corrupts registers:
|
|---|
| 32 | ; AL, BX, CX, DX
|
|---|
| 33 | ;--------------------------------------------------------------------
|
|---|
| [238] | 34 | IDEDEVICE%+Wait_IRQorDRQ:
|
|---|
| [150] | 35 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_DRQ)
|
|---|
| [238] | 36 | %ifdef ASSEMBLE_SHARED_IDE_DEVICE_FUNCTIONS ; JR-IDE/ISA does not support IRQ
|
|---|
| [150] | 37 | test BYTE [bp+IDEPACK.bDeviceControl], FLG_DEVCONTROL_nIEN
|
|---|
| [238] | 38 | jnz SHORT IDEDEVICE%+Wait_PollStatusFlagInBLwithTimeoutInBH ; Interrupt disabled
|
|---|
| 39 | %endif
|
|---|
| [150] | 40 | ; Fall to IdeWait_IRQorStatusFlagInBLwithTimeoutInBH
|
|---|
| 41 |
|
|---|
| 42 |
|
|---|
| 43 | ;--------------------------------------------------------------------
|
|---|
| 44 | ; IdeWait_IRQorStatusFlagInBLwithTimeoutInBH
|
|---|
| 45 | ; Parameters:
|
|---|
| 46 | ; BH: Timeout ticks
|
|---|
| 47 | ; BL: IDE Status Register bit to wait
|
|---|
| 48 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
|
|---|
| 49 | ; Returns:
|
|---|
| 50 | ; AH: INT 13h Error Code
|
|---|
| 51 | ; CF: Cleared if success, Set if error
|
|---|
| 52 | ; Corrupts registers:
|
|---|
| 53 | ; AL, BX, CX, DX
|
|---|
| 54 | ;--------------------------------------------------------------------
|
|---|
| [238] | 55 | IDEDEVICE%+Wait_IRQorStatusFlagInBLwithTimeoutInBH:
|
|---|
| 56 | %ifdef ASSEMBLE_SHARED_IDE_DEVICE_FUNCTIONS ; JR-IDE/ISA does not support IRQ
|
|---|
| [398] | 57 | %ifdef MODULE_IRQ
|
|---|
| 58 | call IdeIrq_WaitForIRQ
|
|---|
| 59 | %endif
|
|---|
| [238] | 60 | %endif
|
|---|
| [150] | 61 | ; Always fall to IdeWait_PollStatusFlagInBLwithTimeoutInBH for error processing
|
|---|
| 62 |
|
|---|
| 63 |
|
|---|
| 64 | ;--------------------------------------------------------------------
|
|---|
| 65 | ; IdeWait_PollStatusFlagInBLwithTimeoutInBH
|
|---|
| 66 | ; Parameters:
|
|---|
| 67 | ; BH: Timeout ticks
|
|---|
| 68 | ; BL: IDE Status Register bit to poll
|
|---|
| 69 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
|
|---|
| 70 | ; Returns:
|
|---|
| 71 | ; AH: INT 13h Error Code
|
|---|
| 72 | ; CF: Cleared if success, Set if error
|
|---|
| 73 | ; Corrupts registers:
|
|---|
| 74 | ; AL, BX, CX, DX
|
|---|
| 75 | ;--------------------------------------------------------------------
|
|---|
| [238] | 76 | IDEDEVICE%+Wait_PollStatusFlagInBLwithTimeoutInBH:
|
|---|
| [150] | 77 | mov ah, bl
|
|---|
| [155] | 78 | mov cl, bh
|
|---|
| 79 | call Timer_InitializeTimeoutWithTicksInCL
|
|---|
| [150] | 80 | and ah, ~FLG_STATUS_BSY
|
|---|
| [238] | 81 | jz SHORT IDEDEVICE%+PollBsyOnly
|
|---|
| [150] | 82 | ; Fall to PollBsyAndFlgInAH
|
|---|
| 83 |
|
|---|
| 84 | ;--------------------------------------------------------------------
|
|---|
| 85 | ; PollBsyAndFlgInAH
|
|---|
| 86 | ; Parameters:
|
|---|
| 87 | ; AH: Status Register Flag to poll (until set) when device not busy
|
|---|
| 88 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
|
|---|
| 89 | ; Returns:
|
|---|
| 90 | ; AH: BIOS Error code
|
|---|
| 91 | ; CF: Clear if wait completed successfully (no errors)
|
|---|
| 92 | ; Set if any error
|
|---|
| 93 | ; Corrupts registers:
|
|---|
| 94 | ; AL, BX, CX, DX
|
|---|
| 95 | ;--------------------------------------------------------------------
|
|---|
| [266] | 96 | IDEDEVICE%+PollBsyAndFlgInAH:
|
|---|
| 97 | INPUT_TO_AL_FROM_IDE_REGISTER STATUS_REGISTER_in ; Discard contents for first read
|
|---|
| [150] | 98 | ALIGN JUMP_ALIGN
|
|---|
| 99 | .PollLoop:
|
|---|
| [266] | 100 | INPUT_TO_AL_FROM_IDE_REGISTER STATUS_REGISTER_in
|
|---|
| [150] | 101 | test al, FLG_STATUS_BSY ; Controller busy?
|
|---|
| 102 | jnz SHORT .UpdateTimeout ; If so, jump to timeout update
|
|---|
| 103 | test al, ah ; Test secondary flag
|
|---|
| [238] | 104 | jnz SHORT IDEDEVICE%+Error_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL
|
|---|
| [150] | 105 | .UpdateTimeout:
|
|---|
| [155] | 106 | call Timer_SetCFifTimeout
|
|---|
| [150] | 107 | jnc SHORT .PollLoop ; Loop if time left
|
|---|
| [238] | 108 | call IDEDEVICE%+Error_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL
|
|---|
| [150] | 109 | jc SHORT .ReturnErrorCodeInAH
|
|---|
| 110 | mov ah, RET_HD_TIMEOUT ; Expected bit never got set
|
|---|
| 111 | stc
|
|---|
| 112 | .ReturnErrorCodeInAH:
|
|---|
| 113 | ret
|
|---|
| 114 |
|
|---|
| 115 |
|
|---|
| 116 | ;--------------------------------------------------------------------
|
|---|
| 117 | ; PollBsyOnly
|
|---|
| 118 | ; Parameters:
|
|---|
| 119 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
|
|---|
| 120 | ; Returns:
|
|---|
| 121 | ; AH: BIOS Error code
|
|---|
| 122 | ; CF: Clear if wait completed successfully (no errors)
|
|---|
| 123 | ; Set if any error
|
|---|
| 124 | ; Corrupts registers:
|
|---|
| 125 | ; AL, BX, CX, DX
|
|---|
| 126 | ;--------------------------------------------------------------------
|
|---|
| [238] | 127 | IDEDEVICE%+PollBsyOnly:
|
|---|
| [266] | 128 | INPUT_TO_AL_FROM_IDE_REGISTER STATUS_REGISTER_in ; Discard contents for first read
|
|---|
| [150] | 129 | ALIGN JUMP_ALIGN
|
|---|
| 130 | .PollLoop:
|
|---|
| [266] | 131 | INPUT_TO_AL_FROM_IDE_REGISTER STATUS_REGISTER_in
|
|---|
| [150] | 132 | test al, FLG_STATUS_BSY ; Controller busy?
|
|---|
| [238] | 133 | jz SHORT IDEDEVICE%+Error_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL
|
|---|
| [155] | 134 | call Timer_SetCFifTimeout ; Update timeout counter
|
|---|
| [150] | 135 | jnc SHORT .PollLoop ; Loop if time left (sets CF on timeout)
|
|---|
| [238] | 136 | jmp SHORT IDEDEVICE%+Error_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL
|
|---|
