source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Initialization/DetectDrives.asm@ 510

Last change on this file since 510 was 505, checked in by krille_n_@…, 12 years ago

Changes:

  • Reverted the changes to MenuEvents.inc done in r492 since they broke the F1 key function in XTIDECFG.
  • Added a tail-call optimized variant of the CALL_DISPLAY_LIBRARY macro (JMP_DISPLAY_LIBRARY).
  • Put a block size limit in AH1Eh_ChangeXTCFmodeBasedOnControlRegisterInAL. I think it's needed but if not, it's easy to remove.
  • Other optimizations and fixes.
File size: 10.1 KB
Line 
1; Project name : XTIDE Universal BIOS
2; Description : Functions for detecting drive for the BIOS.
3
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
20; Section containing code
21SECTION .text
22
23;--------------------------------------------------------------------
24; Detects all IDE hard disks to be controlled by this BIOS.
25;
26; DetectDrives_FromAllIDEControllers
27; Parameters:
28; DS: RAMVARS segment
29; ES: BDA segment (zero)
30; Returns:
31; Nothing
32; Corrupts registers:
33; All (not segments)
34;--------------------------------------------------------------------
35DetectDrives_FromAllIDEControllers:
36 call RamVars_GetIdeControllerCountToCX
37 mov bp, ROMVARS.ideVars0 ; CS:BP now points to first IDEVARS
38
39.DriveDetectLoop: ; Loop through IDEVARS
40 push cx
41
42 mov cx, g_szDetectMaster
43 mov bh, MASK_DRVNHEAD_SET ; Select Master drive
44 call StartDetectionWithDriveSelectByteInBHandStringInCX ; Detect and create DPT + BOOTNFO
45
46 mov cx, g_szDetectSlave
47 mov bh, MASK_DRVNHEAD_SET | FLG_DRVNHEAD_DRV
48 call StartDetectionWithDriveSelectByteInBHandStringInCX
49
50%ifdef MODULE_HOTKEYS
51 call HotkeyBar_ScanHotkeysFromKeyBufferAndStoreToBootvars ; Done here while CX is still protected
52%endif
53
54 pop cx
55
56 add bp, BYTE IDEVARS_size ; Point to next IDEVARS
57
58%ifdef MODULE_SERIAL
59 jcxz .AddHardDisks ; Set to zero on .ideVarsSerialAuto iteration (if any)
60%endif
61 loop .DriveDetectLoop
62
63%ifdef MODULE_SERIAL
64;----------------------------------------------------------------------
65;
66; if serial drive detected, do not scan (avoids duplicate drives and isn't needed - we already have a connection)
67;
68 call FindDPT_ToDSDIforSerialDevice ; does not modify AX
69 jnc .AddHardDisks
70
71 mov bp, ROMVARS.ideVarsSerialAuto ; Point to our special IDEVARS structure, just for serial scans
72
73%ifdef MODULE_HOTKEYS
74 cmp al, COM_DETECT_HOTKEY_SCANCODE ; Set by last call to HotkeyBar_UpdateDuringDriveDetection above
75 je .DriveDetectLoop
76%endif
77
78 mov al,[cs:ROMVARS.wFlags] ; Configurator set to always scan?
79 or al,[es:BDA.bKBFlgs1] ; Or, did the user hold down the ALT key?
80 and al,8 ; 8 = alt key depressed, same as FLG_ROMVARS_SERIAL_ALWAYSDETECT
81 jnz .DriveDetectLoop
82%endif
83
84.AddHardDisks:
85;----------------------------------------------------------------------
86;
87; Add in hard disks to BDA, finalize our Count and First variables
88;
89; Note that we perform the add to bHDCount and store bFirstDrv even if the count is zero.
90; This is done because we use the value of .bFirstDrv to know how many drives were in the system
91; at the time of boot, and to return that number on int13h/8h calls. Because the count is zero,
92; FindDPT_ForDriveNumber will not find any drives that are ours.
93;
94 mov cx, [RAMVARS.wDrvCntAndFlopCnt] ; Our count of hard disks
95
96 mov al, [es:BDA.bHDCount]
97 add cl, al ; Add our drives to the system count
98 mov [es:BDA.bHDCount], cl
99 or al, 80h ; Or in hard disk flag
100 mov [RAMVARS.bFirstDrv], al ; Store first drive number
101
102.AddFloppies:
103%ifdef MODULE_SERIAL_FLOPPY
104;----------------------------------------------------------------------
105;
106; Add in any emulated serial floppy drives, finalize our packed Count and First variables
107;
108 dec ch
109 mov al, ch
110 js .NoFloppies ; if no drives are present, we store 0ffh
111
112 call FloppyDrive_GetCountFromBIOS_or_BDA
113
114 push ax
115
116 add al, ch ; Add our drives to existing drive count
117 cmp al, 3 ; For BDA, max out at 4 drives (ours is zero based)
118 jb .MaxBDAFloppiesExceeded
119 mov al, 3
120.MaxBDAFloppiesExceeded:
121 eROR_IM al, 2 ; move to bits 6-7
122 inc ax ; low order bit, indicating floppy drive exists
123
124 mov ah, [es:BDA.wEquipment] ; Load Equipment WORD low byte
125 and ah, 03eh ; Mask off drive number and drives present bit
126 or al, ah ; Or in new values
127 mov [es:BDA.wEquipment], al ; and store
128
129 mov al, 1eh ; BDA pointer to Floppy DPT
130 mov si, AH8h_FloppyDPT
131 call Interrupts_InstallHandlerToVectorInALFromCSSI
132
133 pop ax
134
135 shr ch, 1 ; number of drives, 1 or 2 only, to CF flag (clear=1, set=2)
136 rcl al, 1 ; starting drive number in upper 7 bits, number of drives in low bit
137.NoFloppies:
138 mov [RAMVARS.xlateVars+XLATEVARS.bFlopCntAndFirst], al
139%endif
140
141 ret
142
143%ifndef CHECK_FOR_UNUSED_ENTRYPOINTS
144 %if FLG_ROMVARS_SERIAL_SCANDETECT != 8
145 %error "DetectDrives is currently coded to assume that FLG_ROMVARS_SERIAL_SCANDETECT is the same bit as the ALT key code in the BDA. Changes in the code will be needed if these values are no longer the same."
146 %endif
147%endif
148
149
150;--------------------------------------------------------------------
151; StartDetectionWithDriveSelectByteInBHandStringInCX
152; Parameters:
153; BH: Drive Select byte for Drive and Head Register
154; CX: Offset to "Master" or "Slave" string
155; CS:BP: Ptr to IDEVARS for the drive
156; DS: RAMVARS segment
157; ES: Zero (BDA segment)
158; Returns:
159; None
160; Corrupts registers:
161; AX, BL, CX, DX, SI, DI
162;--------------------------------------------------------------------
163StartDetectionWithDriveSelectByteInBHandStringInCX:
164%ifdef MODULE_8BIT_IDE_ADVANCED
165 ; Autodetect port for XT-CF
166 call DetectDrives_DoesIdevarsInCSBPbelongToXTCF
167 jne SHORT .SkipXTCFportDetection
168
169 ; XT-CF do not support slave drives so skip detection
170 test bh, FLG_DRVNHEAD_DRV
171 jnz SHORT NoSlaveDriveAvailable
172
173 ; XT-CF do not support slave drives so we can safely update port
174 ; for next drive (another XT-CF card on same system)
175.DetectNextPort:
176 mov dx, [es:BOOTVARS.wNextXTCFportToScan]
177 xor dl, 40h
178 jnz SHORT .StoreNextXTCFportToScan
179 inc dh
180 cmp dh, XTCF_BASE_PORT_4 >> 8
181 ja SHORT .SkipXTCFportDetection ; XT-CF not found from any port
182.StoreNextXTCFportToScan:
183 mov [es:BOOTVARS.wNextXTCFportToScan], dx
184
185 call AH1Eh_DetectXTCFwithBasePortInDX
186 jc SHORT .DetectNextPort ; XT-CF not found from this port
187
188 ; We now have autodetected port in DX
189 push dx
190 xchg ax, dx ; Port to print in AX
191 call DetectPrint_StartDetectWithAutodetectedBasePortInAXandIdeVarsInCSBP
192 jmp SHORT .DriveDetectionStringPrintedOnScreen
193
194 ; Print detect string for devices that do not support autodetection
195.SkipXTCFportDetection:
196 push dx
197%endif ; MODULE_8BIT_IDE_ADVANCED
198
199 call DetectPrint_StartDetectWithMasterOrSlaveStringInCXandIdeVarsInCSBP
200.DriveDetectionStringPrintedOnScreen:
201%ifdef MODULE_HOTKEYS
202 call HotkeyBar_UpdateDuringDriveDetection
203%endif
204
205%ifdef MODULE_8BIT_IDE_ADVANCED
206 pop dx
207%endif
208 ; Fall to .ReadAtaInfoFromHardDisk
209
210
211;--------------------------------------------------------------------
212; .ReadAtaInfoFromHardDisk
213; Parameters:
214; BH: Drive Select byte for Drive and Head Register
215; DX: Autodetected port (for devices that support autodetection)
216; CS:BP: Ptr to IDEVARS for the drive
217; DS: RAMVARS segment
218; ES: Zero (BDA segment)
219; Returns:
220; CF: Cleared if ATA-information read successfully
221; Set if any error
222; Corrupts registers:
223; AX, BL, CX, DX, SI, DI
224;--------------------------------------------------------------------
225.ReadAtaInfoFromHardDisk:
226 mov si, BOOTVARS.rgbAtaInfo ; ES:SI now points to ATA info location
227 push es
228 push si
229 push dx
230 push bx
231 call Device_IdentifyToBufferInESSIwithDriveSelectByteInBH
232 pop bx
233 pop dx
234 pop si
235 pop es
236 jnc SHORT CreateBiosTablesForHardDisk
237 ; Fall to .ReadAtapiInfoFromDrive
238
239.ReadAtapiInfoFromDrive: ; Not yet implemented
240 ;call ReadAtapiInfoFromDrive ; Assume CD-ROM
241 ;jnc SHORT _CreateBiosTablesForCDROM
242
243 ;jmp short DetectDrives_DriveNotFound
244;;; fall-through instead of previous jmp instruction
245;--------------------------------------------------------------------
246; DetectDrives_DriveNotFound
247; Parameters:
248; Nothing
249; Returns:
250; CF: Set (from DetectPrint_NullTerminatedStringFromCSSIandSetCF)
251; Corrupts registers:
252; AX, SI
253;--------------------------------------------------------------------
254DetectDrives_DriveNotFound:
255 mov si, g_szNotFound
256 jmp DetectPrint_NullTerminatedStringFromCSSIandSetCF
257
258
259;--------------------------------------------------------------------
260; CreateBiosTablesForHardDisk
261; Parameters:
262; BH: Drive Select byte for Drive and Head Register
263; DX: Autodetected port (for devices that support autodetection)
264; CS:BP: Ptr to IDEVARS for the drive
265; ES:SI Ptr to ATA information for the drive
266; DS: RAMVARS segment
267; ES: BDA segment
268; Returns:
269; Nothing
270; Corrupts registers:
271; AX, BX, CX, DX, SI, DI
272;--------------------------------------------------------------------
273CreateBiosTablesForHardDisk:
274 push bx
275 call AtaID_VerifyFromESSI
276 pop bx
277 jc SHORT DetectDrives_DriveNotFound
278 call CreateDPT_FromAtaInformation
279 jc SHORT DetectDrives_DriveNotFound
280 call DriveDetectInfo_CreateForHardDisk
281 jmp SHORT DetectPrint_DriveNameFromDrvDetectInfoInESBX
282
283
284%ifdef MODULE_8BIT_IDE_ADVANCED
285;--------------------------------------------------------------------
286; DetectDrives_DoesIdevarsInCSBPbelongToXTCF
287; Parameters:
288; CS:BP: Ptr to IDEVARS for the drive
289; Returns:
290; ZF: Set if IDEVARS belongs to XT-CF device
291; Cleared if some other device
292; Corrupts registers:
293; AL
294;--------------------------------------------------------------------
295DetectDrives_DoesIdevarsInCSBPbelongToXTCF:
296 mov al, [cs:bp+IDEVARS.bDevice]
297 cmp al, DEVICE_8BIT_XTCF_PIO8
298 je SHORT .DeviceIsXTCF
299 cmp al, DEVICE_8BIT_XTCF_DMA
300 je SHORT .DeviceIsXTCF
301 cmp al, DEVICE_8BIT_XTCF_MEMMAP
302.DeviceIsXTCF:
303NoSlaveDriveAvailable:
304 ret
305%endif ; MODULE_8BIT_IDE_ADVANCED
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