source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Device/IDE/IdeWait.asm@ 490

Last change on this file since 490 was 489, checked in by gregli@…, 12 years ago

Added version string to initial title banner, for cases where there is not a boot menu (just hotkeys, or no hotkeys). Also ifdef'd out some unused code.
File size: 4.6 KB
RevLine 
[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
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
[150]79 and ah, ~FLG_STATUS_BSY
[400]80 jz SHORT PollBsyOnly
[150]81 ; Fall to PollBsyAndFlgInAH
82
83;--------------------------------------------------------------------
84; PollBsyAndFlgInAH
85; Parameters:
86; AH: Status Register Flag to poll (until set) when device not busy
87; DS:DI: Ptr to DPT (in RAMVARS segment)
88; Returns:
89; AH: BIOS Error code
90; CF: Clear if wait completed successfully (no errors)
91; Set if any error
92; Corrupts registers:
93; AL, BX, CX, DX
94;--------------------------------------------------------------------
[489]95.IdePollBsyAndFlgInAH:
[400]96 call IdeIO_InputStatusRegisterToAL ; Discard contents of first read
97
[150]98.PollLoop:
[400]99 call IdeIO_InputStatusRegisterToAL
[150]100 test al, FLG_STATUS_BSY ; Controller busy?
101 jnz SHORT .UpdateTimeout ; If so, jump to timeout update
102 test al, ah ; Test secondary flag
[400]103 jnz SHORT IdeError_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL
[150]104.UpdateTimeout:
[155]105 call Timer_SetCFifTimeout
[150]106 jnc SHORT .PollLoop ; Loop if time left
[400]107 call IdeError_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL
[150]108 jc SHORT .ReturnErrorCodeInAH
109 mov ah, RET_HD_TIMEOUT ; Expected bit never got set
110 stc
111.ReturnErrorCodeInAH:
112 ret
113
114
115;--------------------------------------------------------------------
116; PollBsyOnly
117; Parameters:
118; DS:DI: Ptr to DPT (in RAMVARS segment)
119; Returns:
120; AH: BIOS Error code
121; CF: Clear if wait completed successfully (no errors)
122; Set if any error
123; Corrupts registers:
124; AL, BX, CX, DX
125;--------------------------------------------------------------------
[400]126PollBsyOnly:
127 call IdeIO_InputStatusRegisterToAL ; Discard contents of first read
128
[150]129.PollLoop:
[400]130 call IdeIO_InputStatusRegisterToAL
[150]131 test al, FLG_STATUS_BSY ; Controller busy?
[400]132 jz SHORT IdeError_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL
[155]133 call Timer_SetCFifTimeout ; Update timeout counter
[150]134 jnc SHORT .PollLoop ; Loop if time left (sets CF on timeout)
[400]135 jmp SHORT IdeError_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL
Note: See TracBrowser for help on using the repository browser.