source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Device/IDE/IdeWait.asm

Last change on this file was 588, checked in by krille_n_@…, 9 years ago

Changes:

  • Fixed a bug in AH24h_HSetBlocks.asm from r550. Trying to set a too large block size with an XT-CF card in DMA transfer mode would corrupt the stack.
  • Fixed a bug from r545 where the list of devices under g_szDeviceTypeValues in Strings.asm was no longer up to date causing the boot menu to display the wrong string for devices numbered higher than DEVICE_8BIT_XTCF_PIO8.
  • Made some fairly significant changes to the XT-CF code to reduce size. Two changes in functionality; 1) Added a simple check to validate the request for a change of the XT-CF transfer mode. 2) Changing transfer mode to use DMA no longer calls AH24h_SetBlockSize if the block size already is within the limits of DMA transfers. UNTESTED
  • XTIDECFG now clears IDEVARS.bIRQ when changing IDE controller to a serial device to keep the boot menu from displaying it since the serial device doesn't use IRQs at all.
  • Other minor optimizations.
File size: 4.6 KB
RevLine 
[150]1; Project name  :   XTIDE Universal BIOS
2; Description   :   IDE Device wait functions.
3
[376]4;
[491]5; XTIDE Universal BIOS and Associated Tools
[526]6; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team.
[376]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.
[491]12;
[376]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
[491]16; GNU General Public License for more details.
[376]17; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
[491]18;
[376]19
[150]20; Section containing code
21SECTION .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;--------------------------------------------------------------------
[400]34IdeWait_IRQorDRQ:
[150]35    mov     bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_DRQ)
[400]36
37%ifdef MODULE_IRQ
[150]38    test    BYTE [bp+IDEPACK.bDeviceControl], FLG_DEVCONTROL_nIEN
[400]39    jnz     SHORT IdeWait_PollStatusFlagInBLwithTimeoutInBH ; Interrupt disabled
[238]40%endif
[150]41    ; Fall to IdeWait_IRQorStatusFlagInBLwithTimeoutInBH
42
43
44;--------------------------------------------------------------------
45; IdeWait_IRQorStatusFlagInBLwithTimeoutInBH
46;   Parameters:
47;       BH:     Timeout ticks
48;       BL:     IDE Status Register bit to wait
49;       DS:DI:  Ptr to DPT (in RAMVARS segment)
50;   Returns:
51;       AH:     INT 13h Error Code
52;       CF:     Cleared if success, Set if error
53;   Corrupts registers:
54;       AL, BX, CX, DX
55;--------------------------------------------------------------------
[400]56IdeWait_IRQorStatusFlagInBLwithTimeoutInBH:
57%ifdef MODULE_IRQ
58    call    IdeIrq_WaitForIRQ
[238]59%endif
[150]60    ; Always fall to IdeWait_PollStatusFlagInBLwithTimeoutInBH for error processing
61
62
63;--------------------------------------------------------------------
64; IdeWait_PollStatusFlagInBLwithTimeoutInBH
65;   Parameters:
66;       BH:     Timeout ticks
67;       BL:     IDE Status Register bit to poll
68;       DS:DI:  Ptr to DPT (in RAMVARS segment)
69;   Returns:
70;       AH:     INT 13h Error Code
71;       CF:     Cleared if success, Set if error
72;   Corrupts registers:
73;       AL, BX, CX, DX
74;--------------------------------------------------------------------
[400]75IdeWait_PollStatusFlagInBLwithTimeoutInBH:
[150]76    mov     ah, bl
[155]77    mov     cl, bh
78    call    Timer_InitializeTimeoutWithTicksInCL
[532]79    call    IdeIO_InputStatusRegisterToAL       ; Discard contents of first read
[150]80    and     ah, ~FLG_STATUS_BSY
[400]81    jz      SHORT 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;--------------------------------------------------------------------
[491]96PollBsyAndFlgInAH:
[150]97.PollLoop:
[400]98    call    IdeIO_InputStatusRegisterToAL
[588]99    test    al, al                              ; Controller busy? (Check for FLG_STATUS_BSY)
100    js      SHORT .UpdateTimeout                ;  If so, jump to timeout update
[150]101    test    al, ah                              ; Test secondary flag
[400]102    jnz     SHORT IdeError_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL
[150]103.UpdateTimeout:
[155]104    call    Timer_SetCFifTimeout
[150]105    jnc     SHORT .PollLoop                     ; Loop if time left
[400]106    call    IdeError_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL
[150]107    jc      SHORT .ReturnErrorCodeInAH
108    mov     ah, RET_HD_TIMEOUT                  ; Expected bit never got set
109    stc
110.ReturnErrorCodeInAH:
111    ret
112
113
114;--------------------------------------------------------------------
115; PollBsyOnly
116;   Parameters:
117;       DS:DI:  Ptr to DPT (in RAMVARS segment)
118;   Returns:
119;       AH:     BIOS Error code
120;       CF:     Clear if wait completed successfully (no errors)
121;               Set if any error
122;   Corrupts registers:
123;       AL, BX, CX, DX
124;--------------------------------------------------------------------
[400]125PollBsyOnly:
[150]126.PollLoop:
[400]127    call    IdeIO_InputStatusRegisterToAL
[588]128    test    al, al                              ; Controller busy? (Check for FLG_STATUS_BSY)
129    jns     SHORT IdeError_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL
[155]130    call    Timer_SetCFifTimeout                ; Update timeout counter
[150]131    jnc     SHORT .PollLoop                     ; Loop if time left (sets CF on timeout)
[567]132.End:                                           ; Label used for sanity check during assembly
133    ; Fall to IdeError_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL
134
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