arch/x86/include/sys/bootvfs.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #ifndef _SYS_BOOTVFS_H
  27 #define _SYS_BOOTVFS_H
  28
  29 #ifdef __cplusplus
  30 extern "C" {
  31 #endif
  32
  33 #include <sys/bootstat.h>
  34 #include <sys/dirent.h>
  35
  36 /* same as those in /usr/include/unistd.h */
  37 #define SEEK_SET        0       /* Offset */
  38 #define SEEK_CUR        1       /* Current + Offset */
  39 #define SEEK_END        2       /* EOF + Offset */
  40
  41 /* mountroot/unmountroot return values */
  42 #define VFS_SUCCESS     0
  43 #define VFS_FAILURE     -1
  44
  45 /*
  46  * unified (vfs-like) file system operations for booters
  47  */
  48
  49 struct boot_fs_ops {
  50     char        *fsw_name;
  51     int         (*fsw_mountroot)(char *str);
  52     int         (*fsw_unmountroot)(void);
  53     int         (*fsw_open)(char *filename, int flags);
  54     int         (*fsw_close)(int fd);
  55     ssize_t     (*fsw_read)(int fd, caddr_t buf, size_t size);
  56     off_t       (*fsw_lseek)(int filefd, off_t addr, int whence);
  57     int         (*fsw_fstat)(int filefd, struct bootstat *buf);
  58     void        (*fsw_closeall)(int flag);
  59     int         (*fsw_getdents)(int fd, struct dirent *buf, unsigned size);
  60 };
  61
  62 /*
  63  *  Function prototypes
  64  *
  65  *      fstat() (if exists) supports size and mode right now.
  66  */
  67
  68 extern struct boot_fs_ops *bfs_ops;
  69
  70 #ifdef _KERNEL
  71
  72 extern int BRD_MOUNTROOT(struct boot_fs_ops *, char *);
  73 extern int BRD_UNMOUNTROOT(struct boot_fs_ops *);
  74 extern int BRD_OPEN(struct boot_fs_ops *, char *, int);
  75 extern int BRD_CLOSE(struct boot_fs_ops *, int);
  76 extern ssize_t BRD_READ(struct boot_fs_ops *, int, caddr_t, size_t);
  77 extern off_t BRD_SEEK(struct boot_fs_ops *, int, off_t, int);
  78 extern int BRD_FSTAT(struct boot_fs_ops *, int, struct bootstat *);
  79
  80 #else
  81
  82 #define BRD_MOUNTROOT(ops, str)         ((ops)->fsw_mountroot)(str)
  83 #define BRD_UNMOUNTROOT(ops)            ((ops)->fsw_unmountroot)()
  84 #define BRD_OPEN(ops, file, flag)       ((ops)->fsw_open)(file, flag)
  85 #define BRD_CLOSE(ops, fd)              ((ops)->fsw_close)(fd)
  86 #define BRD_READ(ops, fd, buf, s)       ((ops)->fsw_read)(fd, buf, s)
  87 #define BRD_SEEK(ops, fd, addr, w)      ((ops)->fsw_lseek)(fd, addr, w)
  88 #define BRD_FSTAT(ops, fd, stp)         ((ops)->fsw_fstat)(fd, stp)
  89
  90 #endif
  91
  92 #define SYSTEM_BOOT_PATH        "/system/boot"
  93 #define BFD_F_SYSTEM_BOOT       0x40000000
  94
  95 #ifdef _BOOT
  96
  97 extern  int     mountroot(char *str);
  98 extern  int     unmountroot(void);
  99 extern  int     open(const char *filename, int flags);
 100 extern  int     close(int fd);
 101 extern  ssize_t read(int fd, void *buf, size_t size);
 102 extern  off_t   lseek(int filefd, off_t addr, int whence);
 103 extern  void    closeall(int flag);
 104
 105 #endif /* _BOOT */
 106
 107 #ifdef __cplusplus
 108 }
 109 #endif
 110
 111 #endif /* _SYS_BOOTVFS_H */