source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Device/IDE/IdeWait.asm@ 609

Last change on this file since 609 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
Note: See TracBrowser for help on using the repository browser.