source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Initialization/AtaID.asm@ 625

Last change on this file since 625 was 625, checked in by Krister Nordvall, 22 months ago

Changes:

  • Added a configuration option to let the BIOS store RamVars to an UMB when Full operating mode is enabled. This is primarily for XT class machines with RAM in the UMA (which apparently is a common thing these days).
  • Added two new builds specifically for IBM PS/2 machines. This is for support of the new McIDE adapter from the guys at zzxio.com. Note that the additional hardware specific code (under the USE_PS2 define) is for the PS/2 machines themselves and not for the McIDE adapters, so any controller in an IBM PS/2 machine can be used with the USE_PS2 define.
  • Moved pColorTheme out of the range of ROMVARS being copied over when doing "Load old settings from EEPROM" in XTIDECFG. This fixed a serious bug from r592 where loading a BIOS from file and then loading the old settings from ROM would corrupt 7 bytes of code somewhere in the loaded BIOS.
  • Optimizations (speed and size) to the library. Browsing the menus in XTIDECFG should now feel a little less sluggish.
  • Hopefully fixed a problem with the PostCommitHook script where it sometimes wouldn't find the CommitInProgress file. I say hopefully because testing this is a nightmare.
File size: 9.4 KB
Line 
1; Project name : XTIDE Universal BIOS
2; Description : Functions for accessing ATA information read with
3; IDENTIFY DEVICE command.
4
5;
6; XTIDE Universal BIOS and Associated Tools
7; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2023 by XTIDE Universal BIOS Team.
8;
9; This program is free software; you can redistribute it and/or modify
10; it under the terms of the GNU General Public License as published by
11; the Free Software Foundation; either version 2 of the License, or
12; (at your option) any later version.
13;
14; This program is distributed in the hope that it will be useful,
15; but WITHOUT ANY WARRANTY; without even the implied warranty of
16; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17; GNU General Public License for more details.
18; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
19;
20
21; Section containing code
22SECTION .text
23
24;--------------------------------------------------------------------
25; Adjust ATA information for compatibility, debug, etc purposes.
26; We can also completely ignore the drive if necessary.
27;
28; AtaID_FixIllegalValuesFromESSI
29; Parameters:
30; AH: INT 13h Error Code from reading ATA information
31; CF: Cleared if successfully read ATA information,
32; Set if failed to read ATA information
33; ES:SI: Ptr to 512-byte ATA information read from the drive
34; Returns:
35; ES:SI: Ata information with possible corrections made
36; AH: INT 13h Error Code from reading ATA information
37; CF Cleared if drive now accepted
38; Corrupts registers:
39; AL, BX, CX, DX, DI
40;--------------------------------------------------------------------
41%ifndef NO_ATAID_CORRECTION
42%ifndef EXCLUDE_FROM_BIOSDRVS
43AtaID_PopESSIandFixIllegalValuesFromESSI:
44 pop si
45 pop es
46%endif
47AtaID_FixIllegalValuesFromESSI: ; Unused entrypoint OK
48 jc SHORT .Return ; Nothing to fix since failed to read ATA Info
49
50 ; Only correct cylinders since there are no reports that head or sectors could be wrong
51 mov cx, MAX_PCHS_CYLINDERS
52 MIN_U [es:si+ATA1.wCylCnt], cx ; Limit to max allowed value
53
54 ; Note! There are ATA ID words 54-58 that also need to be modified! However,
55 ; the drive itself should modify them when we do Initialize Device Parameters command at AH=9h.
56 ; Verification from real drive needed before we fix them manually
57
58 clc ; Return success
59.Return:
60 ret
61%endif ; NO_ATAID_CORRECTION
62
63
64%ifndef EXCLUDE_FROM_BIOSDRVS
65;--------------------------------------------------------------------
66; AtaID_VerifyFromESSI
67; Parameters:
68; ES:SI: Ptr to 512-byte ATA information read from the drive
69; Returns:
70; ZF: Set if ATA-ID verified successfully
71; Cleared if failed to verify ATA-ID
72; Corrupts registers:
73; AX, BX, CX
74;--------------------------------------------------------------------
75%ifndef NO_ATAID_VALIDATION
76AtaID_VerifyFromESSI:
77 ; We cannot start by reading ATA version since the ID might be
78 ; corrupted. We start by making sure P-CHS values are valid.
79 ; If they are, we assume the ATA ID to be valid. Fortunately we can do
80 ; further checking for ATA-5 and later since they contain signature and
81 ; checksum bytes. Those are not available for ATA-4 and older.
82
83 ; Verify P-CHS cylinders
84 mov bx, ATA1.wCylCnt
85 mov ax, MAX_PCHS_CYLINDERS
86 call .CompareCHorSfromOffsetBXtoMaxValueInAX
87
88 mov bl, ATA1.wHeadCnt & 0FFh
89 mov ax, MAX_PCHS_HEADS
90 call .CompareCHorSfromOffsetBXtoMaxValueInAX
91
92 mov bl, ATA1.wSPT & 0FFh
93 mov al, MAX_PCHS_SECTORS_PER_TRACK
94 call .CompareCHorSfromOffsetBXtoMaxValueInAX
95
96 ; Check signature byte. It is only found on ATA-5 and later. It should be zero on
97 ; ATA-4 and older.
98 mov al, [es:si+ATA6.bSignature]
99 test al, al
100 jz SHORT .AtaIDverifiedSuccessfully ; Old ATA so Signature and Checksum is not available
101 cmp al, A6_wIntegrity_SIGNATURE
102 jne SHORT .FailedToVerifyAtaID
103
104 ; Check checksum byte since signature was present
105 mov cx, ATA6_size
106 jmp Memory_SumCXbytesFromESSItoAL ; Returns with ZF set according to result
107
108;--------------------------------------------------------------------
109; .CompareCHorSfromOffsetBXtoMaxValueInAX
110; Parameters:
111; AX: Maximum valid C, H or S value
112; BX: C, H or S offset to ATA-ID
113; ES:SI: Ptr to 512-byte ATA information read from the drive
114; Returns:
115; Exits from AtaID_VerifyFromESSI with ZF cleared if invalid value
116; Corrupts registers:
117; CX
118;--------------------------------------------------------------------
119.CompareCHorSfromOffsetBXtoMaxValueInAX:
120 mov cx, [es:bx+si]
121 jcxz .InvalidPCHorSinOffsetBX
122 cmp cx, ax ; Compare to max valid value
123 jbe SHORT .ValidPCHorSinOffsetBX
124.InvalidPCHorSinOffsetBX:
125 pop cx ; Clear return address for this function
126 inc cx ; Clear ZF to indicate invalid ATA-ID (safe to do since return address in CX will never be FFFFh)
127.AtaIDverifiedSuccessfully:
128.FailedToVerifyAtaID:
129.ValidPCHorSinOffsetBX:
130 ret
131%endif ; NO_ATAID_VALIDATION
132
133
134;--------------------------------------------------------------------
135; Writes user defined limits from ROMVARS to ATA ID read from the drive.
136; Modifying the ATA ID reduces code and possibilities for bugs since
137; only little further checks are needed elsewhere.
138;
139; AtaID_ModifyESSIforUserDefinedLimitsAndReturnTranslateModeInDX
140; Parameters:
141; DS:DI: Ptr to incomplete Disk Parameter Table
142; ES:SI: Ptr to 512-byte ATA information read from the drive
143; CS:BP: Ptr to IDEVARS for the controller
144; Returns:
145; DX: User defined P-CHS to L-CHS translate mode
146; Corrupts registers:
147; AX, BX
148;--------------------------------------------------------------------
149AtaID_ModifyESSIforUserDefinedLimitsAndReturnTranslateModeInDX:
150 call AccessDPT_GetPointerToDRVPARAMStoCSBX
151 push ds
152
153 push cs
154 pop ds
155
156 ; Load User Defined CHS or LBA to BX:AX
157 mov dl, [bx+DRVPARAMS.wFlags] ; Only load the flags we actually need
158 mov ax, [bx+DRVPARAMS.wCylinders] ; Or .dwMaximumLBA
159 mov bx, [bx+DRVPARAMS.wHeadsAndSectors] ; Or .dwMaximumLBA+2
160
161 push es
162 pop ds ; DS:SI now points to ATA information
163
164 ; * User defined CHS *
165 test dl, FLG_DRVPARAMS_USERCHS
166 jz SHORT .NoUserDefinedCHS
167
168 ; Apply new CHS and disable LBA (we also want to set CHS addressing)
169 mov [si+ATA1.wCylCnt], ax
170 eMOVZX ax, bl
171 mov [si+ATA1.wHeadCnt], ax
172 mov al, bh
173 mov [si+ATA1.wSPT], ax
174 and BYTE [si+ATA1.wCaps+1], ~(A1_wCaps_LBA>>8)
175 and BYTE [si+ATA6.wSetSup83+1], ~(A6_wSetSup83_LBA48>>8)
176.NoUserDefinedCHS:
177
178 ; * User defined LBA *
179 test dl, FLG_DRVPARAMS_USERLBA
180 jz SHORT .NoUserDefinedLBA
181
182 ; Apply new LBA and disable LBA48
183 cmp bx, [si+ATA1.dwLBACnt+2]
184 ja SHORT .NoUserDefinedLBA ; Do not set larger than drive
185 jb SHORT .StoreNewLBA
186 cmp ax, [si+ATA1.dwLBACnt]
187 ja SHORT .NoUserDefinedLBA ; Allow same size to disable LBA48
188.StoreNewLBA:
189 mov [si+ATA1.dwLBACnt], ax
190 mov [si+ATA1.dwLBACnt+2], bx
191 and BYTE [si+ATA6.wSetSup83+1], ~(A6_wSetSup83_LBA48>>8)
192.NoUserDefinedLBA:
193
194 ; * Load P-CHS to L-CHS translate mode to DX *
195 and dx, BYTE MASK_DRVPARAMS_TRANSLATEMODE
196 eSHR_IM dx, TRANSLATEMODE_FIELD_POSITION
197
198 pop ds
199 ret
200
201
202%ifdef MODULE_ADVANCED_ATA
203;--------------------------------------------------------------------
204; AtaID_GetMaxPioModeToAXandMinCycleTimeToCX
205; Parameters:
206; ES:SI: Ptr to 512-byte ATA information read from the drive
207; Returns:
208; AL: Max supported PIO mode
209; AH: FLGH_DPT_IORDY if IORDY supported, zero otherwise
210; CX: Minimum Cycle Time in nanosecs
211; Corrupts registers:
212; BX
213;--------------------------------------------------------------------
214AtaID_GetMaxPioModeToAXandMinCycleTimeToCX:
215 ; Get PIO mode and cycle time for PIO 0...2
216%ifdef USE_386
217 movzx ax, [es:si+ATA1.bPioMode] ; AH = 0, AL = PIO mode 0, 1 or 2
218%else
219 mov al, [es:si+ATA1.bPioMode]
220 cbw
221%endif
222 mov bx, ax
223 eSHL_IM bx, 1 ; Shift for WORD lookup
224 mov cx, [cs:bx+.rgwPio0to2CycleTimeInNanosecs]
225
226 ; Check if IORDY is supported
227 test BYTE [es:si+ATA2.wCaps+1], A2_wCaps_IORDY >> 8
228 jz SHORT .ReturnPioTimings ; No PIO 3 or higher if no IORDY
229 mov ah, FLGH_DPT_IORDY ; *FIXME* Actually, CF specification v4.1 says that use of IORDY is invalid for PIO modes 5 and 6.
230
231 ; Check if Advanced PIO modes are supported (3 and above)
232 test BYTE [es:si+ATA2.wFields], A2_wFields_64to70
233 jz SHORT .ReturnPioTimings
234
235 ; Get Advanced PIO mode (Hard Disks supports up to 4 but CF cards can support 5 and 6)
236 or bh, [es:si+ATA2.bPIOSupp]
237 jz SHORT .ReturnPioTimings
238.CheckNextFlag:
239 inc ax
240 shr bh, 1
241 jnz SHORT .CheckNextFlag
242 MIN_U al, 6 ; Make sure not above lookup tables
243 mov cx, [es:si+ATA2.wPIOMinCyF] ; Advanced modes use IORDY
244.ReturnPioTimings:
245 ret
246
247.rgwPio0to2CycleTimeInNanosecs:
248 dw PIO_0_MIN_CYCLE_TIME_NS
249 dw PIO_1_MIN_CYCLE_TIME_NS
250 dw PIO_2_MIN_CYCLE_TIME_NS
251
252
253;--------------------------------------------------------------------
254; AtaID_GetActiveTimeToAXfromPioModeInBX
255; Parameters:
256; BX: PIO Mode
257; Returns:
258; AX: Active Time in nanosecs
259; Corrupts registers:
260; Nothing
261;--------------------------------------------------------------------
262AtaID_GetActiveTimeToAXfromPioModeInBX:
263 eMOVZX ax, [cs:bx+.rgbPioModeToActiveTimeNs]
264 ret
265
266.rgbPioModeToActiveTimeNs:
267 db PIO_0_MIN_ACTIVE_TIME_NS
268 db PIO_1_MIN_ACTIVE_TIME_NS
269 db PIO_2_MIN_ACTIVE_TIME_NS
270 db PIO_3_MIN_ACTIVE_TIME_NS
271 db PIO_4_MIN_ACTIVE_TIME_NS
272 db PIO_5_MIN_ACTIVE_TIME_NS
273 db PIO_6_MIN_ACTIVE_TIME_NS
274
275%endif ; MODULE_ADVANCED_ATA
276
277%endif ; EXCLUDE_FROM_BIOSDRVS
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