source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Inc/CustomDPT.inc @ 370

Last change on this file since 370 was 370, checked in by krille_n_@…, 12 years ago

Changes:

  • Added some missing PIO mode timings to ATA_ID.inc (based on info from http://www.singlix.net/specs/cfspc4_0.pdf)
  • Updated Configuration_FullMode.txt but it may need additional changes as the Tandy info doesn't match the wiki.
  • Optimizations.
  • Excluded some unused code from XTIDECFG.
File size: 4.7 KB
Line 
1; Project name  :   XTIDE Universal BIOS
2; Description   :   Defines for DPT structs containing custom
3;                   Disk Parameter Table used by this BIOS.
4%ifndef CUSTOMDPT_INC
5%define CUSTOMDPT_INC
6
7; Base DPT for all device types
8struc DPT   ; 10 bytes
9    ; General Disk Parameter Table related
10    .wFlags:
11    .bFlagsLow                  resb    1
12    .bFlagsHigh                 resb    1
13    .bIdevarsOffset             resb    1   ; Offset to IDEVARS for this drive
14
15    ; IDE Drive related
16    ; .bLbaHeads and .twLbaSectors are used for LBA addressing only.
17    .bLbaHeads:                 resb    1   ; Number of LBA assisted heads (1...255)
18    .twLbaSectors               resb    2   ; 48-bit sector count for LBA addressing
19
20    ; .wPchsCylinders and .bPchsSectors are used for CHS addressing only.
21    .wPchsCylinders             resb    2   ; Number of P-CHS Cylinders (1...16383)
22    .wPchsHeadsAndSectors:
23    .bPchsHeads                 resb    1   ; Number of P-CHS heads (1...16)
24    .bPchsSectors               resb    1   ; Number of P-CHS Sectors per Track (1...63)
25endstruc
26
27; Bit definitions for DPT.bFlagsLow
28MASKL_DPT_CHS_SHIFT_COUNT       EQU (7<<0)  ; Bits 0...3, P-CHS to L-CHS bit shift count (0...4)
29FLGL_DPT_SLAVE                  EQU FLG_DRVNHEAD_DRV    ; (1<<4), Drive is slave drive
30MASKL_DPT_ADDRESSING_MODE       EQU (3<<5)  ; Bits 5..6, Addressing Mode (bit 6 == FLG_DRVNHEAD_LBA)
31FLGL_DPT_ENABLE_IRQ             EQU (1<<7)
32
33; Bit definitions for DPT.bFlagsHigh
34FLGH_DPT_REVERSED_A0_AND_A3     EQU (1<<0)  ; XTIDE mod, Address lines 0 and 3 reversed
35FLGH_DPT_BLOCK_MODE_SUPPORTED   EQU (1<<1)  ; Use block transfer commands (must be bit 1!)
36%ifdef MODULE_SERIAL
37FLGH_DPT_SERIAL_DEVICE          EQU (1<<2)  ; Serial Port Device
38%endif
39FLGH_DPT_INTERRUPT_IN_SERVICE   EQU (1<<3)  ; Set when waiting for IRQ
40
41; IDE device only
42%ifdef MODULE_ADVANCED_ATA
43FLGH_DPT_IORDY                  EQU (1<<7)  ; Controller and Drive supports IORDY
44%endif
45
46; Serial device only
47FLGH_DPT_SERIAL_FLOPPY                      EQU (1<<4)
48FLGH_DPT_SERIAL_FLOPPY_TYPE_MASK            EQU 0e0h
49FLGH_DPT_SERIAL_FLOPPY_TYPE_FIELD_POSITION  EQU 5
50
51; Addressing modes for DPT.wFlags
52ADDRESSING_MODE_FIELD_POSITION  EQU     5
53ADDRESSING_MODE_LCHS            EQU     0   ; L-CHS Addressing Mode (NORMAL in many other BIOSes)
54ADDRESSING_MODE_PCHS            EQU     1   ; P-CHS Addressing Mode (LARGE in many other BIOSes)
55ADDRESSING_MODE_LBA28           EQU     2   ; 28-bit LBA Addressing Mode
56ADDRESSING_MODE_LBA48           EQU     3   ; 48-bit LBA Addressing Mode
57
58
59; DPT for ATA devices
60struc DPT_ATA   ; 10 + 2 bytes = 12 bytes
61    .dpt                        resb    DPT_size
62    .bBlockSize                 resb    1   ; Current block size in sectors (do not set to zero!)
63    .bInitError                 resb    1
64endstruc
65
66; Flags for BOOTMENUINFO.wInitErrorFlags
67FLG_INITERROR_FAILED_TO_SELECT_DRIVE                EQU     (1<<0)
68FLG_INITERROR_FAILED_TO_INITIALIZE_CHS_PARAMETERS   EQU     (1<<1)
69FLG_INITERROR_FAILED_TO_SET_WRITE_CACHE             EQU     (1<<2)
70FLG_INITERROR_FAILED_TO_RECALIBRATE_DRIVE           EQU     (1<<3)
71FLG_INITERROR_FAILED_TO_SET_BLOCK_MODE              EQU     (1<<4)
72FLG_INITERROR_FAILED_TO_SET_PIO_MODE                EQU     (1<<5)
73
74
75; Additional variables needed to initialize and reset Advanced IDE Controllers.
76; EBDA must be reserved for DPTs when using these!
77%ifdef MODULE_ADVANCED_ATA
78struc DPT_ADVANCED_ATA
79    .dpt_ata                resb    DPT_ATA_size
80    .wControllerID          resb    2   ; Controller specific ID WORD (from Advanced Controller detection)
81    .wControllerBasePort    resb    2   ; Advanced Controller port (not IDE port)
82    .wMinPioCycleTime       resb    2   ; Minimum PIO Cycle Time in ns
83    .bPioMode               resb    1   ; Best supported PIO mode
84    .bDevice                resb    1   ; Device Type from IDEVARS (overrided when 32-bit controller detected)
85endstruc
86%endif
87
88
89; DPT for Serial devices
90%ifdef MODULE_SERIAL
91struc DPT_SERIAL
92    .dpt                        resb    DPT_size
93    .wSerialPortAndBaud:
94    .bSerialPort                resb    1   ; Serial connection I/O port address, divided by 4
95    .bSerialBaud                resb    1   ; Serial connection baud rate divisor
96endstruc
97%endif
98
99
100; This is the common size for all DPTs. All DPTs must be equal size.
101%ifdef MODULE_ADVANCED_ATA
102LARGEST_DPT_SIZE                EQU     DPT_ADVANCED_ATA_size
103%else
104LARGEST_DPT_SIZE                EQU     DPT_ATA_size
105%endif
106
107
108; Number of Sectors per Track is fixed to 63 for LBA assist calculation.
109; 1024 cylinders, 256 heads, 63 sectors = 8.4 GB limit (but DOS does not support more than 255 heads)
110MAX_LCHS_CYLINDERS              EQU     1024
111LBA_ASSIST_SPT                  EQU     63
112
113
114;--------------------------------------------------------------------
115; LIMIT_LBA_CYLINDERS_IN_DXAX_TO_LCHS_CYLINDERS
116;   Parameters:
117;       DX:AX:  Number of LBA cylinders
118;   Returns:
119;       AX:     Number of L-CHS cylinders
120;   Corrupts registers:
121;       Nothing
122;--------------------------------------------------------------------
123%macro LIMIT_LBA_CYLINDERS_IN_DXAX_TO_LCHS_CYLINDERS 0
124    test    dx, dx
125    jnz     SHORT %%LoadMaxValueToAX
126    cmp     ax, MAX_LCHS_CYLINDERS
127    jb      SHORT %%NoNeedToModify
128%%LoadMaxValueToAX:
129    mov     ax, MAX_LCHS_CYLINDERS
130%%NoNeedToModify:
131%endmacro
132
133
134%endif ; CUSTOMDPT_INC
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