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[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [packages/] [redboot/] [v2_0/] [include/] [fs/] [disk.h] - Rev 307
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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 Red Hat, 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., // 59 Temple Place, Suite 330, Boston, MA 02111-1307 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. // // This exception does not invalidate any other reasons why a work based on // this file might be covered by the GNU General Public License. // // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc. // at http://sources.redhat.com/ecos/ecos-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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