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//==========================================================================
//
// disk.h
//
// Stand-alone disk support for RedBoot
//
//==========================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
//
// eCos 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 or (at your option) any later
// version.
//
// eCos 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.
//
// You should have received a copy of the GNU General Public License
// along with eCos; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// As a special exception, if other files instantiate templates or use
// macros or inline functions from this file, or you compile this file
// and link it with other works to produce a work based on this file,
// this file does not by itself cause the resulting work to be covered by
// the GNU General Public License. However the source code for this file
// must still be made available in accordance with section (3) of the GNU
// General Public License v2.
//
// This exception does not invalidate any other reasons why a work based
// on this file might be covered by the GNU General Public License.
// -------------------------------------------
// ####ECOSGPLCOPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s): msalter
// Contributors: msalter
// Date: 2001-07-02
// Purpose:
// Description:
//
// This code is part of RedBoot (tm).
//
//####DESCRIPTIONEND####
//
//==========================================================================
#ifndef CYGONCE_REDBOOT_DISK_H
#define CYGONCE_REDBOOT_DISK_H
#define SECTOR_SIZE 512
// Convenience macros to access disk/filesystem info which may
// be stored in a fixed endian format.
#define __SWAB16(x) \
((((x) & 0xFF) << 8) | (((x) >> 8) & 0xFF))
#define __SWAB32(x) \
((((x) & 0xff) << 24) | \
(((x) & 0xff00) << 8) | \
(((x) >> 8) & 0xff00) | \
(((x) >> 24) & 0xff))
#if (CYG_BYTEORDER == CYG_MSBFIRST)
#define SWAB_LE16(x) __SWAB16(x)
#define SWAB_LE32(x) __SWAB32(x)
#define SWAB_BE16(x) (x)
#define SWAB_BE32(x) (x)
#else
#define SWAB_LE16(x) (x)
#define SWAB_LE32(x) (x)
#define SWAB_BE16(x) __SWAB16(x)
#define SWAB_BE32(x) __SWAB32(x)
#endif
struct partition;
// filesystem interface
typedef struct fs_funs {
// Load a file into memory.
void * (*open)(struct partition *p, const char *path);
int (*read)(void *fp, char *buf, cyg_uint32 nbytes);
} fs_funs_t;
struct disk;
typedef struct partition {
struct disk *disk;
fs_funs_t *funs;
cyg_uint32 start_sector; // first sector in partition
cyg_uint32 nr_sectors; // number of sectors in partition
cyg_uint8 systype; // FAT12, FAT16, Linux, etc.
cyg_uint8 bootflag; // not really used...
} partition_t;
// System types
#define SYSTYPE_FAT12 0x01
#define SYSTYPE_FAT16_32M 0x04
#define SYSTYPE_EXTENDED 0x05
#define SYSTYPE_FAT16 0x06
#define SYSTYPE_LINUX_SWAP 0x82
#define SYSTYPE_LINUX 0x83
typedef struct disk_funs {
int (*read)(struct disk *d,
cyg_uint32 start_sector,
cyg_uint32 *buf,
cyg_uint8 nr_sectors);
} disk_funs_t;
typedef struct disk {
disk_funs_t *funs; // Disk driver functions
void *private; // Whatever is needed by disk functions
cyg_uint32 nr_sectors; // Total disk size in sectors
short kind; // IDE_HD, IDE_CDROM, SCSI_HD, etc
short index; // index within specific kind
partition_t partitions[CYGNUM_REDBOOT_MAX_PARTITIONS];
} disk_t;
#define DISK_READ(d,s,p,n) ((d)->funs->read)((d),(s),(p),(n))
#define PARTITION_READ(part,s,p,n) \
DISK_READ((part)->disk, (s) + (part)->start_sector, (p), (n))
// Kinds of disks
#define DISK_IDE_HD 1
#define DISK_IDE_CDROM 2
#define DISK_FLOPPY 3
// DOS partition table as laid out in the MBR
//
struct mbr_partition {
cyg_uint8 boot_ind; // 0x80 == active
cyg_uint8 head;
cyg_uint8 sector;
cyg_uint8 cyl;
cyg_uint8 sys_ind; // partition type
cyg_uint8 end_head;
cyg_uint8 end_sector;
cyg_uint8 end_cyl;
cyg_uint8 start_sect[4]; // starting sector counting from 0
cyg_uint8 nr_sects[4]; // number of sectors in partition
};
#define MBR_PTABLE_OFFSET 0x1be
#define MBR_MAGIC_OFFSET 0x1fe
#define MBR_MAGIC 0xaa55
// Add a disk to the disk table.
// Return zero if no more room in table.
//
externC int disk_register(disk_t *disk);
#define diskerr_badname -1
#define diskerr_partition -2
#define diskerr_open -3
#define diskerr_read -4
externC int disk_stream_open(connection_info_t *info, int *err);
externC void disk_stream_close(int *err);
externC int disk_stream_read(char *buf, int size, int *err);
externC char *disk_error(int err);
#endif // CYGONCE_REDBOOT_DISK_H
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