fdos.h

AT91RM9200的完整启动代码：包括loader, boot及U-boot三部分均已编译通过！欢迎下载使用！

/*
 * (C) Copyright 2002
 * St鋟bli Faverges - <www.staubli.com>
 * Pierre AUBERT  [e-mail]
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#ifndef _FDOS_H_
#define _FDOS_H_


#undef	FDOS_DEBUG

#ifdef	FDOS_DEBUG
#define	PRINTF(fmt,args...)	printf (fmt ,##args)
#else
#define PRINTF(fmt,args...)
#endif

/* Data structure describing media                                           */
typedef struct fs
{
    unsigned long       tot_sectors;

    int                 cluster_size;
    int                 num_clus;
    
    int                 fat_start;
    int                 fat_len;
    int                 nb_fat;
    int                 num_fat;
    
    int                 dir_start;
    int                 dir_len;

    unsigned char       *fat_buf;
    
} Fs_t;

/* Data structure describing one file system slot                            */
typedef struct slot {
    int (*map) (struct fs *fs,
                struct slot *file,
                int where,
                int *len);
    unsigned long FileSize;

    unsigned short int FirstAbsCluNr;
    unsigned short int PreviousAbsCluNr;
    unsigned short int PreviousRelCluNr;

    Directory_t dir;
} Slot_t;

typedef struct file {
    char                *name;
    int                 Case;
    Fs_t                *fs;
    Slot_t              subdir;
    Slot_t              file;
} File_t;


/* dev.c                                                                     */
int dev_read (void *buffer, int where, int len);
int dev_open (void);
int check_dev (BootSector_t *boot, Fs_t *fs);

/* fat.c                                                                     */
unsigned int fat_decode (Fs_t *fs, unsigned int num);
int read_fat (BootSector_t *boot, Fs_t *fs);

/* vfat.c                                                                    */
int vfat_lookup (Slot_t *dir,
                 Fs_t *fs,
                 Directory_t *dirent,
                 int *entry,
                 int *vfat_start,
                 char *filename, 
                 int flags,
                 char *outname,
                 Slot_t *file);

/* subdir.c                                                                  */
char *basename (char *name);
int open_subdir (File_t *desc);
int open_file (Slot_t *file, Directory_t *dir);
int read_file (Fs_t *fs,
               Slot_t *file,
               char *buf,
               int where,
               int len);
void init_subdir (void);

/* fs.c                                                                      */
int fs_init (Fs_t *fs);


#endif