source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Device/IDE/IdeDPT.asm@ 621

Last change on this file since 621 was 618, checked in by Krister Nordvall, 3 years ago

Changes:

  • Updated the BIOS makefile. Added the NO_ATAID_CORRECTION define back to the Tiny build as I've realized that the correction code should not be needed for builds without MODULE_EBIOS. Also added a new makefile target 'custom' to make it easier for people to make custom builds.
  • Fixed a bug where calling INT 13h/AH=15h for drives not handled by XUB (floppy drives for example) would return an error due to the fact that any non-zero return value in AH from the other BIOS would cause the CF to be set in Int13h_SetErrorCodeToIntpackInSSBPfromAH. The return path is now via Int13h_ReturnFromHandlerWithoutStoringErrorCode which means that no status/error code will be returned in the BDA but that should not be a problem as the other BIOS should do that anyway. This change also fixed another potential problem where return values in DL from the other BIOS were assumed to be drive numbers when MODULE_SERIAL_FLOPPY is included in the build.
  • Minor optimizations and fixes.
File size: 5.4 KB
Line 
1; Project name : XTIDE Universal BIOS
2; Description : Sets IDE Device specific parameters to DPT.
3
4;
5; XTIDE Universal BIOS and Associated Tools
6; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 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
20; Section containing code
21SECTION .text
22
23;--------------------------------------------------------------------
24; IdeDPT_Finalize
25; Parameters:
26; DS:DI: Ptr to Disk Parameter Table
27; ES:SI: Ptr to 512-byte ATA information read from the drive
28; CS:BP: Ptr to IDEVARS for the controller
29; Returns:
30; CF: Clear, IDE interface only supports hard disks
31; Corrupts registers:
32; AX, BX, CX, DX
33;--------------------------------------------------------------------
34IdeDPT_Finalize: ; Unused entrypoint OK
35
36%ifdef MODULE_POWER_MANAGEMENT
37;--------------------------------------------------------------------
38; .DetectPowerManagementSupport
39; Parameters:
40; DS:DI: Ptr to Disk Parameter Table
41; ES:SI: Ptr to 512-byte ATA information read from the drive
42; Returns:
43; Nothing
44; Corrupts registers:
45; AX
46;--------------------------------------------------------------------
47.DetectPowerManagementSupport:
48 mov ax, A6_wSetSup83_APM << 8 | A6_wSetSup82_POWERMAN ; Both of these flags are bit 3
49 and ah, [es:si+ATA6.wSetSup83]
50 and al, [es:si+ATA6.wSetSup82]
51 eSHL_IM ah, 1 ; APM bit 3 to bit 4 (same as FLGH_DPT_APM_SUPPORTED)
52 or al, ah
53 or [di+DPT.bFlagsHigh], al ; FLGH_DPT_POWER_MANAGEMENT_SUPPORTED and FLGH_DPT_APM_SUPPORTED
54%endif ; MODULE_POWER_MANAGEMENT
55
56
57;--------------------------------------------------------------------
58; .StoreDeviceType
59; Parameters:
60; DS:DI: Ptr to Disk Parameter Table
61; CS:BP: Ptr to IDEVARS for the controller
62; Returns:
63; Nothing
64; Corrupts registers:
65; AL
66;--------------------------------------------------------------------
67.StoreDeviceType:
68 call IdeDPT_StoreDeviceTypeToDPTinDSDIfromIdevarsInCSBP
69
70
71;--------------------------------------------------------------------
72; .StoreBlockMode
73; Parameters:
74; DS:DI: Ptr to Disk Parameter Table
75; Returns:
76; Nothing
77; Corrupts registers:
78; Nothing
79;--------------------------------------------------------------------
80.StoreBlockMode:
81 mov BYTE [di+DPT_ATA.bBlockSize], 1
82
83
84%ifdef MODULE_ADVANCED_ATA
85;--------------------------------------------------------------------
86; .StorePioModeAndTimings
87; Parameters:
88; DS:DI: Ptr to Disk Parameter Table
89; ES:SI: Ptr to 512-byte ATA information read from the drive
90; CS:BP: Ptr to IDEVARS for the controller
91; Returns:
92; Nothing
93; Corrupts registers:
94; AX, BX, CX
95;--------------------------------------------------------------------
96.StorePioMode:
97 call AtaID_GetMaxPioModeToAXandMinCycleTimeToCX
98 mov [di+DPT_ADVANCED_ATA.wMinPioCycleTime], cx
99 mov [di+DPT_ADVANCED_ATA.bPioMode], al
100 or [di+DPT.bFlagsHigh], ah
101
102
103;--------------------------------------------------------------------
104; .DetectAdvancedIdeController
105; Parameters:
106; DS:DI: Ptr to Disk Parameter Table
107; ES:SI: Ptr to 512-byte ATA information read from the drive
108; CS:BP: Ptr to IDEVARS for the controller
109; Returns:
110; Nothing
111; Corrupts registers:
112; AX, BX, CX, DX
113;--------------------------------------------------------------------
114.DetectAdvancedIdeController:
115 ; Detection is only relevant on standard devices. XT-CF seems to give false positive for
116 ; PDC20x30 detection so better to skip detection for 8-bit devices
117 cmp BYTE [di+DPT_ATA.bDevice], DEVICE_32BIT_ATA
118 ja SHORT .NoAdvancedControllerDetected
119
120 mov bx, [di+DPT.wBasePort]
121 call AdvAtaInit_DetectControllerForIdeBaseInBX
122 mov [di+DPT_ADVANCED_ATA.wControllerID], ax ; Store zero if none detected
123 mov [di+DPT_ADVANCED_ATA.wControllerBasePort], dx
124 jnc SHORT .NoAdvancedControllerDetected
125
126 ; Use highest common PIO mode from controller and drive.
127 ; Many VLB controllers support PIO modes up to 2.
128 call AdvAtaInit_GetControllerMaxPioModeToALandMinPioCycleTimeToBX
129 jnz SHORT .ChangeTo32bitDevice
130
131 and [di+DPT.bFlagsHigh], ah ; Mask off FLGH_DPT_IORDY if IORDY not supported
132 MIN_U [di+DPT_ADVANCED_ATA.bPioMode], al
133 mov [di+DPT_ADVANCED_ATA.wMinPioCycleTime], bx
134
135 ; We have detected 32-bit controller so change Device Type since
136 ; it might have been set to 16-bit on IDEVARS
137.ChangeTo32bitDevice:
138 mov BYTE [di+DPT_ATA.bDevice], DEVICE_32BIT_ATA
139.NoAdvancedControllerDetected:
140%endif ; MODULE_ADVANCED_ATA
141
142
143; End DPT
144 clc
145 ret
146
147
148;--------------------------------------------------------------------
149; IdeDPT_StoreDeviceTypeToDPTinDSDIfromIdevarsInCSBP
150; Parameters:
151; DS:DI: Ptr to Disk Parameter Table
152; CS:BP: Ptr to IDEVARS for the controller
153; Returns:
154; Nothing
155; Corrupts registers:
156; AL
157;--------------------------------------------------------------------
158IdeDPT_StoreDeviceTypeToDPTinDSDIfromIdevarsInCSBP:
159 mov al, [cs:bp+IDEVARS.bDevice]
160 mov [di+DPT_ATA.bDevice], al
161 ret
Note: See TracBrowser for help on using the repository browser.