1 | /* |
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2 | * JFFS2 -- Journalling Flash File System, Version 2. |
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3 | * |
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4 | * Copyright (C) 2002-2003 Free Software Foundation, Inc. |
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5 | * |
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6 | * Created by David Woodhouse <dwmw2@cambridge.redhat.com> |
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7 | * |
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8 | * For licensing information, see the file 'LICENCE' in this directory. |
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9 | * |
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10 | * $Id: os-ecos.h,v 1.24 2005/02/09 09:23:55 pavlov Exp $ |
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11 | * |
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12 | */ |
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13 | |
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14 | #ifndef __JFFS2_OS_ECOS_H__ |
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15 | #define __JFFS2_OS_ECOS_H__ |
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16 | |
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17 | #include <pkgconf/fs_jffs2.h> |
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18 | #include <cyg/io/io.h> |
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19 | #include <sys/types.h> |
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20 | #include <asm/atomic.h> |
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21 | #include <linux/stat.h> |
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22 | #include <linux/compiler.h> |
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23 | |
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24 | #include <pkgconf/system.h> |
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25 | #include <pkgconf/hal.h> |
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26 | #include <pkgconf/io_fileio.h> |
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27 | |
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28 | #include <cyg/infra/cyg_trac.h> // tracing macros |
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29 | #include <cyg/infra/cyg_ass.h> // assertion macros |
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30 | |
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31 | #include <unistd.h> |
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32 | #include <sys/types.h> |
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33 | #include <fcntl.h> |
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34 | #include <sys/stat.h> |
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35 | #include <errno.h> |
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36 | #include <dirent.h> |
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37 | |
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38 | #include <stdlib.h> |
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39 | #include <string.h> |
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40 | |
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41 | #include <cyg/fileio/fileio.h> |
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42 | |
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43 | #include <cyg/hal/drv_api.h> |
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44 | #include <cyg/infra/diag.h> |
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45 | |
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46 | #include <cyg/io/flash.h> |
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47 | |
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48 | #include <linux/types.h> |
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49 | #include <linux/list.h> |
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50 | #include <asm/bug.h> |
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51 | |
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52 | #define printf diag_printf |
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53 | |
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54 | struct _inode; |
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55 | struct super_block; |
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56 | |
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57 | struct iovec { |
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58 | void *iov_base; |
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59 | ssize_t iov_len; |
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60 | }; |
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61 | |
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62 | static inline unsigned int full_name_hash(const unsigned char * name, unsigned int len) { |
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63 | |
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64 | unsigned hash = 0; |
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65 | while (len--) { |
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66 | hash = (hash << 4) | (hash >> 28); |
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67 | hash ^= *(name++); |
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68 | } |
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69 | return hash; |
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70 | } |
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71 | |
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72 | #ifdef CYGOPT_FS_JFFS2_WRITE |
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73 | #define jffs2_is_readonly(c) (0) |
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74 | #else |
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75 | #define jffs2_is_readonly(c) (1) |
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76 | #endif |
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77 | |
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78 | /* NAND flash not currently supported on eCos */ |
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79 | #define jffs2_can_mark_obsolete(c) (1) |
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80 | |
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81 | #define JFFS2_INODE_INFO(i) (&(i)->jffs2_i) |
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82 | #define OFNI_EDONI_2SFFJ(f) ((struct _inode *) ( ((char *)f) - ((char *)(&((struct _inode *)NULL)->jffs2_i)) ) ) |
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83 | |
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84 | #define JFFS2_F_I_SIZE(f) (OFNI_EDONI_2SFFJ(f)->i_size) |
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85 | #define JFFS2_F_I_MODE(f) (OFNI_EDONI_2SFFJ(f)->i_mode) |
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86 | #define JFFS2_F_I_UID(f) (OFNI_EDONI_2SFFJ(f)->i_uid) |
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87 | #define JFFS2_F_I_GID(f) (OFNI_EDONI_2SFFJ(f)->i_gid) |
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88 | #define JFFS2_F_I_CTIME(f) (OFNI_EDONI_2SFFJ(f)->i_ctime) |
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89 | #define JFFS2_F_I_MTIME(f) (OFNI_EDONI_2SFFJ(f)->i_mtime) |
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90 | #define JFFS2_F_I_ATIME(f) (OFNI_EDONI_2SFFJ(f)->i_atime) |
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91 | |
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92 | /* FIXME: eCos doesn't hav a concept of device major/minor numbers */ |
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93 | #define JFFS2_F_I_RDEV_MIN(f) ((OFNI_EDONI_2SFFJ(f)->i_rdev)&0xff) |
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94 | #define JFFS2_F_I_RDEV_MAJ(f) ((OFNI_EDONI_2SFFJ(f)->i_rdev)>>8) |
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95 | |
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96 | #define get_seconds cyg_timestamp |
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97 | |
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98 | struct _inode { |
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99 | cyg_uint32 i_ino; |
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100 | |
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101 | int i_count; |
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102 | mode_t i_mode; |
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103 | nlink_t i_nlink; // Could we dispense with this? |
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104 | uid_t i_uid; |
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105 | gid_t i_gid; |
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106 | time_t i_atime; |
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107 | time_t i_mtime; |
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108 | time_t i_ctime; |
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109 | // union { |
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110 | unsigned short i_rdev; // For devices only |
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111 | struct _inode * i_parent; // For directories only |
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112 | off_t i_size; // For files only |
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113 | // }; |
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114 | struct super_block * i_sb; |
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115 | |
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116 | struct jffs2_inode_info jffs2_i; |
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117 | |
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118 | struct _inode * i_cache_prev; // We need doubly-linked? |
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119 | struct _inode * i_cache_next; |
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120 | }; |
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121 | |
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122 | #define JFFS2_SB_INFO(sb) (&(sb)->jffs2_sb) |
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123 | #define OFNI_BS_2SFFJ(c) ((struct super_block *) ( ((char *)c) - ((char *)(&((struct super_block *)NULL)->jffs2_sb)) ) ) |
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124 | |
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125 | struct super_block { |
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126 | struct jffs2_sb_info jffs2_sb; |
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127 | struct _inode * s_root; |
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128 | unsigned long s_mount_count; |
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129 | cyg_io_handle_t s_dev; |
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130 | |
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131 | #ifdef CYGOPT_FS_JFFS2_GCTHREAD |
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132 | cyg_mutex_t s_lock; // Lock the inode cache |
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133 | cyg_flag_t s_gc_thread_flags; // Communication with the gcthread |
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134 | cyg_handle_t s_gc_thread_handle; |
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135 | cyg_thread s_gc_thread; |
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136 | #if (CYGNUM_JFFS2_GC_THREAD_STACK_SIZE >= CYGNUM_HAL_STACK_SIZE_MINIMUM) |
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137 | char s_gc_thread_stack[CYGNUM_JFFS2_GC_THREAD_STACK_SIZE]; |
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138 | #else |
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139 | char s_gc_thread_stack[CYGNUM_HAL_STACK_SIZE_MINIMUM]; |
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140 | #endif |
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141 | cyg_mtab_entry *mte; |
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142 | #endif |
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143 | }; |
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144 | |
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145 | #define sleep_on_spinunlock(wq, sl) spin_unlock(sl) |
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146 | #define EBADFD 32767 |
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147 | |
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148 | /* background.c */ |
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149 | #ifdef CYGOPT_FS_JFFS2_GCTHREAD |
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150 | void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c); |
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151 | void jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c); |
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152 | void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c); |
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153 | #else |
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154 | static inline void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c) |
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155 | { |
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156 | /* We don't have a GC thread in eCos (yet) */ |
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157 | } |
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158 | #endif |
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159 | |
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160 | /* fs-ecos.c */ |
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161 | struct _inode *jffs2_new_inode (struct _inode *dir_i, int mode, struct jffs2_raw_inode *ri); |
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162 | struct _inode *jffs2_iget(struct super_block *sb, cyg_uint32 ino); |
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163 | void jffs2_iput(struct _inode * i); |
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164 | void jffs2_gc_release_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f); |
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165 | struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c, int inum, int nlink); |
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166 | unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c, struct jffs2_inode_info *f, |
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167 | unsigned long offset, unsigned long *priv); |
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168 | void jffs2_gc_release_page(struct jffs2_sb_info *c, unsigned char *pg, unsigned long *priv); |
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169 | |
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170 | /* Avoid polluting eCos namespace with names not starting in jffs2_ */ |
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171 | #define os_to_jffs2_mode(x) jffs2_from_os_mode(x) |
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172 | uint32_t jffs2_from_os_mode(uint32_t osmode); |
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173 | uint32_t jffs2_to_os_mode (uint32_t jmode); |
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174 | |
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175 | |
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176 | /* flashio.c */ |
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177 | cyg_bool jffs2_flash_read(struct jffs2_sb_info *c, cyg_uint32 read_buffer_offset, |
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178 | const size_t size, size_t * return_size, unsigned char * write_buffer); |
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179 | cyg_bool jffs2_flash_write(struct jffs2_sb_info *c, cyg_uint32 write_buffer_offset, |
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180 | const size_t size, size_t * return_size, unsigned char * read_buffer); |
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181 | int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct iovec *vecs, |
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182 | unsigned long count, loff_t to, size_t *retlen); |
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183 | cyg_bool jffs2_flash_erase(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); |
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184 | |
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185 | // dir-ecos.c |
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186 | struct _inode *jffs2_lookup(struct _inode *dir_i, const unsigned char *name, int namelen); |
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187 | int jffs2_create(struct _inode *dir_i, const unsigned char *d_name, int mode, struct _inode **new_i); |
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188 | int jffs2_mkdir (struct _inode *dir_i, const unsigned char *d_name, int mode); |
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189 | int jffs2_link (struct _inode *old_d_inode, struct _inode *dir_i, const unsigned char *d_name); |
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190 | int jffs2_unlink(struct _inode *dir_i, struct _inode *d_inode, const unsigned char *d_name); |
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191 | int jffs2_rmdir (struct _inode *dir_i, struct _inode *d_inode, const unsigned char *d_name); |
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192 | int jffs2_rename (struct _inode *old_dir_i, struct _inode *d_inode, const unsigned char *old_d_name, |
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193 | struct _inode *new_dir_i, const unsigned char *new_d_name); |
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194 | |
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195 | /* erase.c */ |
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196 | static inline void jffs2_erase_pending_trigger(struct jffs2_sb_info *c) |
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197 | { } |
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198 | |
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199 | #ifndef CONFIG_JFFS2_FS_WRITEBUFFER |
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200 | #define SECTOR_ADDR(x) ( ((unsigned long)(x) & ~(c->sector_size-1)) ) |
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201 | #define jffs2_can_mark_obsolete(c) (1) |
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202 | #define jffs2_cleanmarker_oob(c) (0) |
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203 | #define jffs2_write_nand_cleanmarker(c,jeb) (-EIO) |
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204 | |
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205 | #define jffs2_flush_wbuf_pad(c) (c=c) |
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206 | #define jffs2_flush_wbuf_gc(c, i) ({ (void)(c), (void) i, 0; }) |
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207 | #define jffs2_nand_read_failcnt(c,jeb) do { ; } while(0) |
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208 | #define jffs2_write_nand_badblock(c,jeb,p) (0) |
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209 | #define jffs2_flash_setup(c) (0) |
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210 | #define jffs2_nand_flash_cleanup(c) do {} while(0) |
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211 | #define jffs2_wbuf_dirty(c) (0) |
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212 | #define jffs2_flash_writev(a,b,c,d,e,f) jffs2_flash_direct_writev(a,b,c,d,e) |
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213 | #define jffs2_wbuf_timeout NULL |
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214 | #define jffs2_wbuf_process NULL |
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215 | #define jffs2_nor_ecc(c) (0) |
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216 | #else |
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217 | #error no nand yet |
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218 | #endif |
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219 | |
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220 | #ifndef BUG_ON |
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221 | #define BUG_ON(x) do { if (unlikely(x)) BUG(); } while(0) |
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222 | #endif |
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223 | |
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224 | #define __init |
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225 | |
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226 | #endif /* __JFFS2_OS_ECOS_H__ */ |
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