1 /* 2 * (C) Copyright 2000-2004 3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 #ifndef _PART_H 8 #define _PART_H 9 10 #include <blk.h> 11 #include <ide.h> 12 13 #define LOG2(x) (((x & 0xaaaaaaaa) ? 1 : 0) + ((x & 0xcccccccc) ? 2 : 0) + \ 14 ((x & 0xf0f0f0f0) ? 4 : 0) + ((x & 0xff00ff00) ? 8 : 0) + \ 15 ((x & 0xffff0000) ? 16 : 0)) 16 #define LOG2_INVALID(type) ((type)((sizeof(type)<<3)-1)) 17 18 /* Part types */ 19 #define PART_TYPE_UNKNOWN 0x00 20 #define PART_TYPE_MAC 0x01 21 #define PART_TYPE_DOS 0x02 22 #define PART_TYPE_ISO 0x03 23 #define PART_TYPE_AMIGA 0x04 24 #define PART_TYPE_EFI 0x05 25 26 /* 27 * Type string for U-Boot bootable partitions 28 */ 29 #define BOOT_PART_TYPE "U-Boot" /* primary boot partition type */ 30 #define BOOT_PART_COMP "PPCBoot" /* PPCBoot compatibility type */ 31 32 /* device types */ 33 #define DEV_TYPE_UNKNOWN 0xff /* not connected */ 34 #define DEV_TYPE_HARDDISK 0x00 /* harddisk */ 35 #define DEV_TYPE_TAPE 0x01 /* Tape */ 36 #define DEV_TYPE_CDROM 0x05 /* CD-ROM */ 37 #define DEV_TYPE_OPDISK 0x07 /* optical disk */ 38 39 typedef struct disk_partition { 40 lbaint_t start; /* # of first block in partition */ 41 lbaint_t size; /* number of blocks in partition */ 42 ulong blksz; /* block size in bytes */ 43 uchar name[32]; /* partition name */ 44 uchar type[32]; /* string type description */ 45 int bootable; /* Active/Bootable flag is set */ 46 #ifdef CONFIG_PARTITION_UUIDS 47 char uuid[37]; /* filesystem UUID as string, if exists */ 48 #endif 49 #ifdef CONFIG_PARTITION_TYPE_GUID 50 char type_guid[37]; /* type GUID as string, if exists */ 51 #endif 52 } disk_partition_t; 53 54 /* Misc _get_dev functions */ 55 #ifdef CONFIG_PARTITIONS 56 /** 57 * blk_get_dev() - get a pointer to a block device given its type and number 58 * 59 * Each interface allocates its own devices and typically struct blk_desc is 60 * contained with the interface's data structure. There is no global 61 * numbering for block devices, so the interface name must be provided. 62 * 63 * @ifname: Interface name (e.g. "ide", "scsi") 64 * @dev: Device number (0 for first device on that interface, 1 for 65 * second, etc. 66 * @return pointer to the block device, or NULL if not available, or an 67 * error occurred. 68 */ 69 struct blk_desc *blk_get_dev(const char *ifname, int dev); 70 struct blk_desc *ide_get_dev(int dev); 71 struct blk_desc *sata_get_dev(int dev); 72 struct blk_desc *scsi_get_dev(int dev); 73 struct blk_desc *usb_stor_get_dev(int dev); 74 struct blk_desc *mmc_get_dev(int dev); 75 76 /** 77 * mmc_select_hwpart() - Select the MMC hardware partiion on an MMC device 78 * 79 * MMC devices can support partitioning at the hardware level. This is quite 80 * separate from the normal idea of software-based partitions. MMC hardware 81 * partitions must be explicitly selected. Once selected only the region of 82 * the device covered by that partition is accessible. 83 * 84 * The MMC standard provides for two boot partitions (numbered 1 and 2), 85 * rpmb (3), and up to 4 addition general-purpose partitions (4-7). 86 * 87 * @dev_num: Block device number (struct blk_desc->dev value) 88 * @hwpart: Hardware partition number to select. 0 means the raw device, 89 * 1 is the first partition, 2 is the second, etc. 90 * @return 0 if OK, other value for an error 91 */ 92 int mmc_select_hwpart(int dev_num, int hwpart); 93 struct blk_desc *systemace_get_dev(int dev); 94 struct blk_desc *mg_disk_get_dev(int dev); 95 struct blk_desc *host_get_dev(int dev); 96 int host_get_dev_err(int dev, struct blk_desc **blk_devp); 97 98 /* disk/part.c */ 99 int get_partition_info(struct blk_desc *dev_desc, int part, 100 disk_partition_t *info); 101 void print_part(struct blk_desc *dev_desc); 102 void init_part(struct blk_desc *dev_desc); 103 void dev_print(struct blk_desc *dev_desc); 104 105 /** 106 * blk_get_device_by_str() - Get a block device given its interface/hw partition 107 * 108 * Each interface allocates its own devices and typically struct blk_desc is 109 * contained with the interface's data structure. There is no global 110 * numbering for block devices, so the interface name must be provided. 111 * 112 * The hardware parition is not related to the normal software partitioning 113 * of a device - each hardware partition is effectively a separately 114 * accessible block device. When a hardware parition is selected on MMC the 115 * other hardware partitions become inaccessible. The same block device is 116 * used to access all hardware partitions, but its capacity may change when a 117 * different hardware partition is selected. 118 * 119 * When a hardware partition number is given, the block device switches to 120 * that hardware partition. 121 * 122 * @ifname: Interface name (e.g. "ide", "scsi") 123 * @dev_str: Device and optional hw partition. This can either be a string 124 * containing the device number (e.g. "2") or the device number 125 * and hardware partition number (e.g. "2.4") for devices that 126 * support it (currently only MMC). 127 * @dev_desc: Returns a pointer to the block device on success 128 * @return block device number (local to the interface), or -1 on error 129 */ 130 int blk_get_device_by_str(const char *ifname, const char *dev_str, 131 struct blk_desc **dev_desc); 132 int get_device_and_partition(const char *ifname, const char *dev_part_str, 133 struct blk_desc **dev_desc, 134 disk_partition_t *info, int allow_whole_dev); 135 #else 136 static inline struct blk_desc *blk_get_dev(const char *ifname, int dev) 137 { return NULL; } 138 static inline struct blk_desc *ide_get_dev(int dev) { return NULL; } 139 static inline struct blk_desc *sata_get_dev(int dev) { return NULL; } 140 static inline struct blk_desc *scsi_get_dev(int dev) { return NULL; } 141 static inline struct blk_desc *usb_stor_get_dev(int dev) { return NULL; } 142 static inline struct blk_desc *mmc_get_dev(int dev) { return NULL; } 143 static inline int mmc_select_hwpart(int dev_num, int hwpart) { return -1; } 144 static inline struct blk_desc *systemace_get_dev(int dev) { return NULL; } 145 static inline struct blk_desc *mg_disk_get_dev(int dev) { return NULL; } 146 static inline struct blk_desc *host_get_dev(int dev) { return NULL; } 147 148 static inline int get_partition_info(struct blk_desc *dev_desc, int part, 149 disk_partition_t *info) { return -1; } 150 static inline void print_part(struct blk_desc *dev_desc) {} 151 static inline void init_part(struct blk_desc *dev_desc) {} 152 static inline void dev_print(struct blk_desc *dev_desc) {} 153 static inline int blk_get_device_by_str(const char *ifname, const char *dev_str, 154 struct blk_desc **dev_desc) 155 { return -1; } 156 static inline int get_device_and_partition(const char *ifname, 157 const char *dev_part_str, 158 struct blk_desc **dev_desc, 159 disk_partition_t *info, 160 int allow_whole_dev) 161 { *dev_desc = NULL; return -1; } 162 #endif 163 164 #ifdef CONFIG_MAC_PARTITION 165 /* disk/part_mac.c */ 166 int get_partition_info_mac(struct blk_desc *dev_desc, int part, 167 disk_partition_t *info); 168 void print_part_mac(struct blk_desc *dev_desc); 169 int test_part_mac(struct blk_desc *dev_desc); 170 #endif 171 172 #ifdef CONFIG_DOS_PARTITION 173 /* disk/part_dos.c */ 174 int get_partition_info_dos(struct blk_desc *dev_desc, int part, 175 disk_partition_t *info); 176 void print_part_dos(struct blk_desc *dev_desc); 177 int test_part_dos(struct blk_desc *dev_desc); 178 #endif 179 180 #ifdef CONFIG_ISO_PARTITION 181 /* disk/part_iso.c */ 182 int get_partition_info_iso(struct blk_desc *dev_desc, int part, 183 disk_partition_t *info); 184 void print_part_iso(struct blk_desc *dev_desc); 185 int test_part_iso(struct blk_desc *dev_desc); 186 #endif 187 188 #ifdef CONFIG_AMIGA_PARTITION 189 /* disk/part_amiga.c */ 190 int get_partition_info_amiga(struct blk_desc *dev_desc, int part, 191 disk_partition_t *info); 192 void print_part_amiga(struct blk_desc *dev_desc); 193 int test_part_amiga(struct blk_desc *dev_desc); 194 #endif 195 196 #ifdef CONFIG_EFI_PARTITION 197 #include <part_efi.h> 198 /* disk/part_efi.c */ 199 int get_partition_info_efi(struct blk_desc *dev_desc, int part, 200 disk_partition_t *info); 201 /** 202 * get_partition_info_efi_by_name() - Find the specified GPT partition table entry 203 * 204 * @param dev_desc - block device descriptor 205 * @param gpt_name - the specified table entry name 206 * @param info - returns the disk partition info 207 * 208 * @return - '0' on match, '-1' on no match, otherwise error 209 */ 210 int get_partition_info_efi_by_name(struct blk_desc *dev_desc, 211 const char *name, disk_partition_t *info); 212 void print_part_efi(struct blk_desc *dev_desc); 213 int test_part_efi(struct blk_desc *dev_desc); 214 215 /** 216 * write_gpt_table() - Write the GUID Partition Table to disk 217 * 218 * @param dev_desc - block device descriptor 219 * @param gpt_h - pointer to GPT header representation 220 * @param gpt_e - pointer to GPT partition table entries 221 * 222 * @return - zero on success, otherwise error 223 */ 224 int write_gpt_table(struct blk_desc *dev_desc, 225 gpt_header *gpt_h, gpt_entry *gpt_e); 226 227 /** 228 * gpt_fill_pte(): Fill the GPT partition table entry 229 * 230 * @param gpt_h - GPT header representation 231 * @param gpt_e - GPT partition table entries 232 * @param partitions - list of partitions 233 * @param parts - number of partitions 234 * 235 * @return zero on success 236 */ 237 int gpt_fill_pte(gpt_header *gpt_h, gpt_entry *gpt_e, 238 disk_partition_t *partitions, int parts); 239 240 /** 241 * gpt_fill_header(): Fill the GPT header 242 * 243 * @param dev_desc - block device descriptor 244 * @param gpt_h - GPT header representation 245 * @param str_guid - disk guid string representation 246 * @param parts_count - number of partitions 247 * 248 * @return - error on str_guid conversion error 249 */ 250 int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h, 251 char *str_guid, int parts_count); 252 253 /** 254 * gpt_restore(): Restore GPT partition table 255 * 256 * @param dev_desc - block device descriptor 257 * @param str_disk_guid - disk GUID 258 * @param partitions - list of partitions 259 * @param parts - number of partitions 260 * 261 * @return zero on success 262 */ 263 int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid, 264 disk_partition_t *partitions, const int parts_count); 265 266 /** 267 * is_valid_gpt_buf() - Ensure that the Primary GPT information is valid 268 * 269 * @param dev_desc - block device descriptor 270 * @param buf - buffer which contains the MBR and Primary GPT info 271 * 272 * @return - '0' on success, otherwise error 273 */ 274 int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf); 275 276 /** 277 * write_mbr_and_gpt_partitions() - write MBR, Primary GPT and Backup GPT 278 * 279 * @param dev_desc - block device descriptor 280 * @param buf - buffer which contains the MBR and Primary GPT info 281 * 282 * @return - '0' on success, otherwise error 283 */ 284 int write_mbr_and_gpt_partitions(struct blk_desc *dev_desc, void *buf); 285 286 /** 287 * gpt_verify_headers() - Function to read and CRC32 check of the GPT's header 288 * and partition table entries (PTE) 289 * 290 * As a side effect if sets gpt_head and gpt_pte so they point to GPT data. 291 * 292 * @param dev_desc - block device descriptor 293 * @param gpt_head - pointer to GPT header data read from medium 294 * @param gpt_pte - pointer to GPT partition table enties read from medium 295 * 296 * @return - '0' on success, otherwise error 297 */ 298 int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head, 299 gpt_entry **gpt_pte); 300 301 /** 302 * gpt_verify_partitions() - Function to check if partitions' name, start and 303 * size correspond to '$partitions' env variable 304 * 305 * This function checks if on medium stored GPT data is in sync with information 306 * provided in '$partitions' environment variable. Specificially, name, start 307 * and size of the partition is checked. 308 * 309 * @param dev_desc - block device descriptor 310 * @param partitions - partition data read from '$partitions' env variable 311 * @param parts - number of partitions read from '$partitions' env variable 312 * @param gpt_head - pointer to GPT header data read from medium 313 * @param gpt_pte - pointer to GPT partition table enties read from medium 314 * 315 * @return - '0' on success, otherwise error 316 */ 317 int gpt_verify_partitions(struct blk_desc *dev_desc, 318 disk_partition_t *partitions, int parts, 319 gpt_header *gpt_head, gpt_entry **gpt_pte); 320 #endif 321 322 #endif /* _PART_H */ 323