source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Device/IDE/IdeDPT.asm@ 624

Last change on this file since 624 was 623, checked in by Krister Nordvall, 2 years ago

Changes:

  • Reversed the change to IdeDPT.asm in r622 as it didn't work as intended.
  • Reordered some procedures to reduce alignment padding.
  • Added two new defines (EXTRA_LOOP_UNROLLING_SMALL and EXTRA_LOOP_UNROLLING_LARGE) that should improve transfer speeds for some hardware combinations, specifically 808x CPUs with any IDE controller using port I/O and any CPU with XT-IDE controllers.
  • Added a new define (USE_086) for use with 8086 and V30 CPUs only. Unlike the other USE_x86 defines, this define will not change the instruction set used and is therefore compatible with all CPUs. However, it will apply padding to make jump destinations WORD aligned which should improve performance on 8086/V30 CPUs but on 8088/V20 CPUs there is no benefit and, in addition to wasting ROM space, it might in fact be slower on these machines. Since the vast majority of XT class machines are using 8088/V20 CPUs this define is not used in the official XT builds - it's primarily intended for custom BIOS builds.
  • XTIDECFG: The URL to the support forum has been updated.
File size: 5.6 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
136 ; since it might have been set to 16-bit on IDEVARS
137.ChangeTo32bitDevice:
138 ; *FIXME* We might need to add code to detect the IBM 486SLC2 CPU (and possibly other
139 ; 386+ class CPUs with a 16-bit external bus?) to avoid changing to DEVICE_32BIT_ATA.
140 mov BYTE [di+DPT_ATA.bDevice], DEVICE_32BIT_ATA
141.NoAdvancedControllerDetected:
142%endif ; MODULE_ADVANCED_ATA
143
144 ; End DPT
145 clc
146 ret
147
148
149;--------------------------------------------------------------------
150; IdeDPT_StoreDeviceTypeToDPTinDSDIfromIdevarsInCSBP
151; Parameters:
152; DS:DI: Ptr to Disk Parameter Table
153; CS:BP: Ptr to IDEVARS for the controller
154; Returns:
155; Nothing
156; Corrupts registers:
157; AL
158;--------------------------------------------------------------------
159IdeDPT_StoreDeviceTypeToDPTinDSDIfromIdevarsInCSBP:
160 mov al, [cs:bp+IDEVARS.bDevice]
161 mov [di+DPT_ATA.bDevice], al
162 ret
Note: See TracBrowser for help on using the repository browser.