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0aba4bc7fb
some cruft. git-svn-id: https://svn.code.sf.net/p/freedos/svn/kernel/trunk@686 6ac86273-5f31-0410-b378-82cca8765d1b
476 lines
18 KiB
C
476 lines
18 KiB
C
/****************************************************************/
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/* */
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/* device.h */
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/* Device Driver Header File */
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/* */
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/* November 20, 1991 */
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/* */
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/* Copyright (c) 1995 */
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/* Pasquale J. Villani */
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/* All Rights Reserved */
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/* */
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/* This file is part of DOS-C. */
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/* */
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/* DOS-C is free software; you can redistribute it and/or */
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/* modify it under the terms of the GNU General Public License */
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/* as published by the Free Software Foundation; either version */
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/* 2, or (at your option) any later version. */
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/* */
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/* DOS-C is distributed in the hope that it will be useful, but */
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/* WITHOUT ANY WARRANTY; without even the implied warranty of */
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/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See */
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/* the GNU General Public License for more details. */
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/* */
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/* You should have received a copy of the GNU General Public */
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/* License along with DOS-C; see the file COPYING. If not, */
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/* write to the Free Software Foundation, 675 Mass Ave, */
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/* Cambridge, MA 02139, USA. */
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/****************************************************************/
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#ifdef MAIN
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#ifdef VERSION_STRINGS
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static BYTE *device_hRcsId =
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"$Id$";
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#endif
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#endif
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/*
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* Status Word Bits
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*/
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#define S_ERROR 0x8000 /* Error bit */
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#define S_BUSY 0x0200 /* Device busy bit */
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#define S_DONE 0x0100 /* Device operation completed */
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#define S_MASK 0x00ff /* Mask to extract error code */
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/*
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* MEDIA Descriptor Byte Bits
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*/
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#define MD_2SIDE 1 /* MEDIA is two sided */
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#define MD_8SECTOR 2 /* MEDIA is eight sectored */
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#define MD_REMOVABLE 4 /* MEDIA is removable (floppy) */
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/*
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* Media Return Codes
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*/
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#define M_CHANGED -1 /* MEDIA was changed */
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#define M_DONT_KNOW 0 /* MEDIA state unkown */
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#define M_NOT_CHANGED 1 /* MEDIA was not changed */
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/*
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* Error Return Codes
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*/
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#define E_WRPRT 0 /* Write Protect */
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#define E_UNIT 1 /* Unknown Unit */
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#define E_NOTRDY 2 /* Device Not Ready */
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#define E_CMD 3 /* Unknown Command */
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#define E_CRC 4 /* Crc Error */
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#define E_LENGTH 5 /* Bad Length */
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#define E_SEEK 6 /* Seek Error */
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#define E_MEDIA 7 /* Unknown MEDIA */
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#define E_NOTFND 8 /* Sector Not Found */
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#define E_PAPER 9 /* No Paper */
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#define E_WRITE 10 /* Write Fault */
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#define E_READ 11 /* Read Fault */
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#define E_FAILURE 12 /* General Failure */
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/*
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* Command codes
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*/
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#define C_INIT 0x00 /* Initialize */
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#define C_MEDIACHK 0x01 /* MEDIA Check */
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#define C_BLDBPB 0x02 /* Build BPB */
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#define C_IOCTLIN 0x03 /* Ioctl In */
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#define C_INPUT 0x04 /* Input (Read) */
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#define C_NDREAD 0x05 /* Non-destructive Read */
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#define C_ISTAT 0x06 /* Input Status */
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#define C_IFLUSH 0x07 /* Input Flush */
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#define C_OUTPUT 0x08 /* Output (Write) */
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#define C_OUTVFY 0x09 /* Output with verify */
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#define C_OSTAT 0x0a /* Output */
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#define C_OFLUSH 0x0b /* Output Flush */
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#define C_IOCTLOUT 0x0c /* Ioctl Out */
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#define C_OPEN 0x0d /* Device Open */
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#define C_CLOSE 0x0e /* Device Close */
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#define C_REMMEDIA 0x0f /* Removable MEDIA */
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#define C_OUB 0x10 /* Output till busy */
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#define C_GENIOCTL 0x13 /* Generic Ioctl */
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#define C_GETLDEV 0x17 /* Get Logical Device */
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#define C_SETLDEV 0x18 /* Set Logical Device */
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#define C_IOCTLQRY 0x19 /* Ioctl Query */
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/*
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* Convienence macros
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*/
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#define failure(x) (S_ERROR+S_DONE+x)
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#ifndef TRUE
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#define TRUE 1
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#endif
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#ifndef FALSE
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#define FALSE 0
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#endif
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/*
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* structures
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*/
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/* Device header */
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struct dhdr {
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struct dhdr
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FAR *dh_next;
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UWORD dh_attr;
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VOID(*dh_strategy) (void);
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VOID(*dh_interrupt) (void);
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UBYTE dh_name[8];
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};
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#define ATTR_SUBST 0x8000
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#define ATTR_CHAR 0x8000
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#define ATTR_IOCTL 0x4000
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#define ATTR_BLDFAT 0x2000
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#define ATTR_REMOTE 0x1000
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#define ATTR_EXCALLS 0x0800
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#define ATTR_QRYIOCTL 0x0080
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#define ATTR_GENIOCTL 0x0040
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#define ATTR_RAW 0x0400
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#define ATTR_FASTCON 0x0010
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#define ATTR_CLOCK 0x0008
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#define ATTR_NULL 0x0004
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#define ATTR_CONOUT 0x0002
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#define ATTR_HUGE 0x0002
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#define ATTR_CONIN 0x0001
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/* */
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/* Bios Parameter Block structure */
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/* */
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#define FAT_NO_MIRRORING 0x80
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#define BPB_SIZEOF 31 /* size of the standard BPB */
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typedef struct {
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UWORD bpb_nbyte; /* Bytes per Sector */
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UBYTE bpb_nsector; /* Sectors per Allocation Unit */
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UWORD bpb_nreserved; /* # Reserved Sectors */
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UBYTE bpb_nfat; /* # FAT's */
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UWORD bpb_ndirent; /* # Root Directory entries */
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UWORD bpb_nsize; /* Size in sectors */
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UBYTE bpb_mdesc; /* MEDIA Descriptor Byte */
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UWORD bpb_nfsect; /* FAT size in sectors */
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UWORD bpb_nsecs; /* Sectors per track */
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UWORD bpb_nheads; /* Number of heads */
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ULONG bpb_hidden; /* Hidden sectors */
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ULONG bpb_huge; /* Size in sectors if */
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/* bpb_nsize == 0 */
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#ifdef WITHFAT32
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ULONG bpb_xnfsect; /* FAT size in sectors if */
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/* bpb_nfsect == 0 */
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UWORD bpb_xflags; /* extended flags */
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/* bit 7: disable mirroring */
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/* bits 6-4: reserved (0) */
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/* bits 3-0: active FAT number */
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UWORD bpb_xfsversion; /* filesystem version */
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ULONG bpb_xrootclst; /* starting cluster of root dir */
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UWORD bpb_xfsinfosec; /* FS info sector number, */
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/* 0xFFFF if unknown */
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UWORD bpb_xbackupsec; /* backup boot sector number */
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/* 0xFFFF if unknown */
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#endif
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} bpb;
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#define N_RETRY 5 /* number of retries permitted */
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#define SEC_SIZE 512 /* size of sector in bytes */
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#define LBA_READ 0x4200
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#define LBA_WRITE 0x4300
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struct _bios_LBA_address_packet
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/* Used to access a hard disk via LBA */
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/* Added by Brian E. Reifsnyder */
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{
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unsigned char packet_size; /* size of this packet...set to 16 */
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unsigned char reserved_1; /* set to 0...unused */
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unsigned char number_of_blocks; /* 0 < number_of_blocks < 128 */
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unsigned char reserved_2; /* set to 0...unused */
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UBYTE far *buffer_address; /* addr of transfer buffer */
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unsigned long block_address; /* LBA address */
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unsigned long block_address_high; /* high bytes of LBA addr...unused */
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};
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struct CHS {
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UWORD Cylinder;
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UWORD Head;
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UWORD Sector;
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};
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/* DOS 4.0-7.0 drive data table (see RBIL at INT2F,AX=0803) */
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typedef struct ddtstruct {
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struct ddtstruct FAR *ddt_next;
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/* pointer to next table (offset FFFFh if last table) */
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UBYTE ddt_driveno; /* physical unit number (for INT 13) */
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UBYTE ddt_logdriveno; /* logical drive number (0=A:) */
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bpb ddt_bpb; /* BIOS Parameter Block */
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UBYTE ddt_flags;
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/* bit 6: 16-bit FAT instead of 12-bit
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bit 7: unsupportable disk (all accesses will return Not Ready) */
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UWORD ddt_FileOC; /* Count of Open files on Drv */
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UBYTE ddt_type; /* device type */
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UWORD ddt_descflags; /* bit flags describing drive */
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UWORD ddt_ncyl; /* number of cylinders
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(for partition only, if hard disk) */
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bpb ddt_defbpb; /* BPB for default (highest) capacity supported */
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UBYTE ddt_reserved[6]; /* (part of BPB above) */
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UBYTE ddt_ltrack; /* last track accessed */
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union {
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ULONG ddt_lasttime; /* removable media: time of last access
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in clock ticks (FFFFFFFFh if never) */
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struct {
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UWORD ddt_part; /* partition (FFFFh = primary, 0001h = extended)
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always 0001h for DOS 5+ */
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UWORD ddt_abscyl; /* absolute cylinder number of partition's
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start on physical drive
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(FFFFh if primary partition in DOS 4.x) */
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} ddt_hd;
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} ddt_fh;
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UBYTE ddt_volume[12]; /* ASCIIZ volume label or "NO NAME " if none
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(apparently taken from extended boot record
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rather than root directory) */
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ULONG ddt_serialno; /* serial number */
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UBYTE ddt_fstype[9]; /* ASCIIZ filesystem type ("FAT12 " or "FAT16 ") */
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ULONG ddt_offset; /* relative partition offset */
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BITS ddt_LBASupported:1; /* set, if INT13 extensions enabled */
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BITS ddt_WriteVerifySupported:1;
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} ddt;
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/* description flag bits */
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#define DF_FIXED 0x001
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#define DF_CHANGELINE 0x002
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#define DF_CURBPBLOCK 0x004
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#define DF_SAMESIZE 0x008
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#define DF_MULTLOG 0x010
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#define DF_CURLOG 0x020
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#define DF_DISKCHANGE 0x040
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#define DF_DPCHANGED 0x080
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#define DF_REFORMAT 0x100
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#define DF_NOACCESS 0x200
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/* typedef struct ddtstruct ddt;*/
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struct gblkio {
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UBYTE gbio_spcfunbit;
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UBYTE gbio_devtype;
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UWORD gbio_devattrib;
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UWORD gbio_ncyl;
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UBYTE gbio_media;
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bpb gbio_bpb;
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UWORD gbio_nsecs;
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};
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struct gblkfv /* for format / verify track */
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{
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UBYTE gbfv_spcfunbit;
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UWORD gbfv_head;
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UWORD gbfv_cyl;
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UWORD gbfv_ntracks;
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};
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struct gblkrw /* for read / write track */
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{
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UBYTE gbrw_spcfunbit;
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UWORD gbrw_head;
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UWORD gbrw_cyl;
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UWORD gbrw_sector;
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UWORD gbrw_nsecs;
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UBYTE FAR *gbrw_buffer;
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};
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struct Gioc_media {
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WORD ioc_level;
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ULONG ioc_serialno;
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BYTE ioc_volume[11];
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BYTE ioc_fstype[8];
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};
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/* */
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/* Boot Block (Super Block) */
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/* */
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/* See BPB comments for the offsets below */
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/* */
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#define BT_JUMP 0
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#define BT_OEM 3
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#define BT_BPB 11
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#define BT_SIZEOF 36
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typedef struct {
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BYTE bt_jump[3]; /* Boot Jump opcodes */
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BYTE bt_oem[8]; /* OEM Name */
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bpb bt_bpb; /* BPB for this media/device */
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WORD bt_nsecs; /* # Sectors per Track */
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WORD bt_nheads; /* # Heads */
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WORD bt_hidden; /* # Hidden sectors */
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LONG bt_huge; /* use if nsecs == 0 */
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BYTE bt_drvno;
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BYTE bt_reserv;
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BYTE bt_btid;
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ULONG bt_serialno;
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BYTE bt_volume[11];
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BYTE bt_fstype[8];
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} boot;
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/* File system information structure */
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struct fsinfo {
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UDWORD fi_signature; /* must be 0x61417272 */
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DWORD fi_nfreeclst; /* number of free clusters, -1 if unknown */
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DWORD fi_cluster; /* most recently allocated cluster, -1 if unknown */
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UBYTE fi_reserved[12];
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};
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typedef boot super; /* Alias for boot structure */
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typedef struct {
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UBYTE r_length; /* Request Header length */
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UBYTE r_unit; /* Unit Code */
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UBYTE r_command; /* Command Code */
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UWORD r_status; /* Status */
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BYTE r_reserved[8]; /* DOS Reserved Area */
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union {
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struct {
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UBYTE _r_nunits; /* number of units */
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BYTE FAR *_r_endaddr; /* Ending Address */
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bpb *FAR * _r_bpbptr; /* ptr to BPB array */
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UBYTE _r_firstunit;
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} _r_init;
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struct {
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BYTE _r_meddesc; /* MEDIA Descriptor */
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BYTE _r_retcode; /* Return Code */
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BYTE FAR * _r_vid; /* volume id */
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} _r_media;
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struct {
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BYTE _r_meddesc; /* MEDIA Descriptor */
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boot FAR * _r_fat; /* boot sector pointer */
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bpb FAR * _r_bpbpt; /* ptr to BPB table */
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} _r_bpb;
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struct {
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BYTE _r_meddesc; /* MEDIA Descriptor */
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BYTE FAR * _r_trans; /* Transfer Address */
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UWORD _r_count; /* Byte/Sector Count */
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UWORD _r_start; /* Starting Sector No. */
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BYTE FAR * _r_vid; /* Pointer to volume id */
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LONG _r_huge; /* for > 32Mb drives */
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} _r_rw;
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struct {
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unsigned char _r_ndbyte; /* Byte Read From Device */
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} _r_nd;
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} _r_x;
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} request;
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#define HUGECOUNT 0xffff
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#define MAXSHORT 0xffffl
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/*
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* Macros to assist request structure legibility
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*/
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/* Init packet macros */
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#define r_nunits _r_x._r_init._r_nunits
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#define r_endaddr _r_x._r_init._r_endaddr
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#define r_bpbptr _r_x._r_init._r_bpbptr
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#define r_firstunit _r_x._r_init._r_firstunit
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/* MEDIA Check packet macros */
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#define r_mcmdesc _r_x._r_media._r_meddesc
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#define r_mcretcode _r_x._r_media._r_retcode
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#define r_mcvid _r_x._r_media._r_vid
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/* Build BPB packet macros */
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#define r_bpmdesc _r_x._r_bpb._r_meddesc
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#define r_bpfat _r_x._r_bpb._r_fat
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#define r_bpptr _r_x._r_bpb._r_bpbpt
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/* rw packet macros */
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#define r_meddesc _r_x._r_rw._r_meddesc
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#define r_trans _r_x._r_rw._r_trans
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#define r_count _r_x._r_rw._r_count
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#define r_start _r_x._r_rw._r_start
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#define r_rwvid _r_x._r_rw._r_vid
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#define r_huge _r_x._r_rw._r_huge
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/* ndread packet macros */
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#define r_ndbyte _r_x._r_nd._r_ndbyte
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/*
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*interrupt support (spl & splx) support - IBM style
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*/
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#define I_NONE 0 /* Initial value */
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/* predefined interrupt levels - 8259 support */
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#define IRQ0 0x01 /* Level 0 - highest */
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#define IRQ1 0x02
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#define IRQ2 0x04
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#define IRQ3 0x08
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#define IRQ4 0x10
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#define IRQ5 0x20
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#define IRQ6 0x40
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#define IRQ7 0x80 /* Level 7 - lowest */
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/* standard hardware configuration */
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#define I_RTC IRQ0 /* Timer */
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#define I_KBD IRQ1 /* Keyboard */
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#define I_COM2 IRQ3 /* COM1: */
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#define I_COM1 IRQ4 /* COM2: */
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#define I_HDC IRQ5 /* Fixed disk */
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#define I_FDC IRQ6 /* Diskette */
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#define I_PRT IRQ7 /* Printer */
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/* standard hardware vectors - 8259 defined */
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#define V_RTC 0x08 /* Timer */
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#define V_KBD 0x09 /* Keyboard */
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#define V_LEV2 0x0a /* Level 2 - uncomitted */
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#define V_COM2 0x0b /* COM1: */
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#define V_COM1 0x0c /* COM2: */
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#define V_HDC 0x0d /* Fixed disk */
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#define V_FDC 0x0e /* Diskette */
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#define V_PRT 0x0f /* Printer */
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#define V_LEV0 0x08 /* Level 0 - highest */
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#define V_LEV1 0x09
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#define V_LEV2 0x0a /* Level 2 - uncomitted */
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#define V_LEV3 0x0b
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#define V_LEV4 0x0c
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#define V_LEV5 0x0d
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#define V_LEV6 0x0e
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#define V_LEV7 0x0f /* Level 7 - lowest */
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/*
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*/
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typedef request FAR *rqptr;
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typedef bpb FAR *bpbptr;
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typedef BYTE FAR *byteptr;
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typedef struct dhdr FAR *dhdrptr;
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extern request /* I/O Request packets */
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ASM CharReqHdr, ASM IoReqHdr, ASM MediaReqHdr;
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/* dsk.c */
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COUNT ASMCFUNC FAR blk_driver(rqptr rp);
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ddt * getddt(int dev);
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/* error.c */
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COUNT char_error(request * rq, struct dhdr FAR * lpDevice);
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COUNT block_error(request * rq, COUNT nDrive, struct dhdr FAR * lpDevice);
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/* sysclk.c */
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WORD ASMCFUNC FAR clk_driver(rqptr rp);
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/* execrh.asm */
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WORD ASMCFUNC execrh(request FAR *, struct dhdr FAR *);
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/*
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* end of device.h
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*/
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