source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Inc/CustomDPT.inc@ 538

; Project name  :   XTIDE Universal BIOS
; Description   :   Defines for DPT structs containing custom
;                   Disk Parameter Table used by this BIOS.

;
; XTIDE Universal BIOS and Associated Tools
; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team.
;
; This program is free software; you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation; either version 2 of the License, or
; (at your option) any later version.
;
; This program is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
; GNU General Public License for more details.
; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
;

%ifndef CUSTOMDPT_INC
%define CUSTOMDPT_INC

; Base DPT for all device types
struc DPT
    ; General Disk Parameter Table related
    .wFlags:
    .bFlagsLow              resb    1
    .bFlagsHigh             resb    1
    .bIdevarsOffset         resb    1   ; Offset to IDEVARS for this drive
    .bInitError             resb    1   ; Flags for AH=09h initialization errors
    .wBasePort              resb    2   ; Segment for JR-IDE/ISA and ADP50L

    ; CHS variables
    .wLchsCylinders         resb    2   ; (1...1027, yes 1027)
    .wLchsHeadsAndSectors:
    .bLchsHeads             resb    1   ; (1...255)
    .bLchsSectorsPerTrack   resb    1   ; (1...63)
    .bPchsHeads             resb    1   ; (1...16)

    ; LBA and remaining P-CHS variables
%ifdef MODULE_EBIOS
    .bPchsSectorsPerTrack   resb    1
    .wPchsCylinders         resb    2
    .twLbaSectors           resb    6   ; 48-bit sector count for LBA addressing
%endif
                            alignb  2   ; WORD alignment for DPT_SERIAL or DPT_ATA
endstruc

    ; Bit definitions for DPT.bFlagsLow
    MASKL_DPT_CHS_SHIFT_COUNT           EQU (3<<0)              ; Bits 0...1, P-CHS to L-CHS bit shift count (0...3)
    MASKL_DPT_TRANSLATEMODE             EQU MASK_DRVPARAMS_TRANSLATEMODE    ; Bits 2...3, NORMAL, LARGE or Assisted LBA addressing mode
    FLGL_DPT_ASSISTED_LBA               EQU (1<<(TRANSLATEMODE_FIELD_POSITION+1))
    FLGL_DPT_SLAVE                      EQU FLG_DRVNHEAD_DRV    ; Bit 4, Drive is a Slave Drive
%ifdef MODULE_IRQ
    FLGL_DPT_ENABLE_IRQ                 EQU (1<<5)              ; Bit 5, Enable IRQ
%endif
%ifdef MODULE_EBIOS
    FLGL_DPT_LBA_AND_EBIOS_SUPPORTED    EQU FLG_DRVNHEAD_LBA    ; Bit 6, Drive supports LBA and so EBIOS functions can be supported
    FLGL_DPT_LBA48                      EQU (1<<7)              ; Bit 7, Drive supports 48-bit LBA (Must be bit 7!)
%endif


    ; Bit definitions for DPT.bFlagsHigh
    FLGH_DPT_BLOCK_MODE_SUPPORTED       EQU (1<<1)  ; Bit 1, Use block transfer commands (must be bit 1!)
%ifdef MODULE_SERIAL
    FLGH_DPT_SERIAL_DEVICE              EQU (1<<2)  ; Bit 2, Serial Port Device
%endif
%ifdef MODULE_IRQ
    FLGH_DPT_INTERRUPT_IN_SERVICE       EQU (1<<3)  ; Bit 3, Set when waiting for IRQ
%endif
%ifdef MODULE_FEATURE_SETS
    FLGH_DPT_POWER_MANAGEMENT_SUPPORTED EQU (1<<5)  ; Bit 5, Drive supports power management
%endif
%ifdef MODULE_ADVANCED_ATA
    FLGH_DPT_IORDY                      EQU (1<<7)  ; Bit 7, Controller and Drive supports IORDY
%endif

    ; Serial device only
%ifdef MODULE_SERIAL_FLOPPY
    FLGH_DPT_SERIAL_FLOPPY                      EQU (1<<4)
    FLGH_DPT_SERIAL_FLOPPY_TYPE_MASK            EQU 0e0h
    FLGH_DPT_SERIAL_FLOPPY_TYPE_FIELD_POSITION  EQU 5
%endif


    ; Flags for DPT_ADVANCED_ATA.bInitError
    FLG_INITERROR_FAILED_TO_SELECT_DRIVE                EQU (1<<0)
    FLG_INITERROR_FAILED_TO_INITIALIZE_CHS_PARAMETERS   EQU (1<<1)
    FLG_INITERROR_FAILED_TO_SET_WRITE_CACHE             EQU (1<<2)
    FLG_INITERROR_FAILED_TO_RECALIBRATE_DRIVE           EQU (1<<3)
    FLG_INITERROR_FAILED_TO_SET_BLOCK_MODE              EQU (1<<4)
    FLG_INITERROR_FAILED_TO_SET_PIO_MODE                EQU (1<<5)
    FLG_INITERROR_FAILED_TO_INITIALIZE_STANDBY_TIMER    EQU (1<<6)
    FLG_INITERROR_FAILED_TO_SET_XTCF_MODE               EQU (1<<7)
    FLG_INITERROR_FAILED_TO_SET_8BIT_MODE               EQU FLG_INITERROR_FAILED_TO_SET_XTCF_MODE



; DPT for ATA devices
struc DPT_ATA
    .dpt                    resb    DPT_size
    .bDevice                resb    1   ; Device Type from IDEVARS (overrided when 32-bit controller detected)
    .bBlockSize             resb    1   ; Current block size in sectors (do not set to zero!)
endstruc



; Additional variables needed to initialize and reset Advanced IDE Controllers.
; EBDA must be reserved for DPTs when using these!
%ifdef MODULE_ADVANCED_ATA
struc DPT_ADVANCED_ATA
    .dpt_ata                resb    DPT_ATA_size
    .wControllerID          resb    2   ; Controller specific ID WORD (from Advanced Controller detection)
    .wControllerBasePort    resb    2   ; Advanced Controller port (not IDE port)
    .wMinPioCycleTime       resb    2   ; Minimum PIO Cycle Time in ns
    .bPioMode               resb    1   ; Best supported PIO mode
                            alignb  2
endstruc
%endif


; DPT for Serial devices
%ifdef MODULE_SERIAL
struc DPT_SERIAL
    .dpt                    resb    DPT_size
    .wSerialPortAndBaud:
    .bSerialPort            resb    1   ; Serial connection I/O port address, divided by 4
    .bSerialBaud            resb    1   ; Serial connection baud rate divisor
endstruc

; On performance critical situations we compare DPT_ATA.bDevice without checking FLGH_DPT_SERIAL_DEVICE
; first! DPT_ATA.bDevice uses small values so there will be no problems.
%ifndef CHECK_FOR_UNUSED_ENTRYPOINTS
    %if DPT_SERIAL.bSerialPort <> DPT_ATA.bDevice
        %error "DPT_ATA.bDevice and DPT_SERIAL.bSerialPort must be in same offsets!"
    %endif
%endif
%endif ; MODULE_SERIAL


; This is the common size for all DPTs. All DPTs must be equal size.
%ifdef MODULE_ADVANCED_ATA
    LARGEST_DPT_SIZE            EQU     DPT_ADVANCED_ATA_size
%else
    LARGEST_DPT_SIZE            EQU     DPT_ATA_size
%endif


    ; Number of Sectors per Track is fixed to 63 for LBA assist calculation.
    ; 1024 cylinders, 256 heads, 63 sectors = 8.4 GB limit (but DOS does not support more than 255 heads)
    MAX_LCHS_CYLINDERS          EQU     1024
    LBA_ASSIST_SPT              EQU     63


%endif ; CUSTOMDPT_INC