2 * (C) Copyright 2000-2004
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * SPDX-License-Identifier: GPL-2.0+
15 int (*select_hwpart)(int dev_num, int hwpart);
18 #define LOG2(x) (((x & 0xaaaaaaaa) ? 1 : 0) + ((x & 0xcccccccc) ? 2 : 0) + \
19 ((x & 0xf0f0f0f0) ? 4 : 0) + ((x & 0xff00ff00) ? 8 : 0) + \
20 ((x & 0xffff0000) ? 16 : 0))
21 #define LOG2_INVALID(type) ((type)((sizeof(type)<<3)-1))
24 #define PART_TYPE_UNKNOWN 0x00
25 #define PART_TYPE_MAC 0x01
26 #define PART_TYPE_DOS 0x02
27 #define PART_TYPE_ISO 0x03
28 #define PART_TYPE_AMIGA 0x04
29 #define PART_TYPE_EFI 0x05
31 /* maximum number of partition entries supported by search */
32 #define DOS_ENTRY_NUMBERS 8
33 #define ISO_ENTRY_NUMBERS 64
34 #define MAC_ENTRY_NUMBERS 64
35 #define AMIGA_ENTRY_NUMBERS 8
37 * Type string for U-Boot bootable partitions
39 #define BOOT_PART_TYPE "U-Boot" /* primary boot partition type */
40 #define BOOT_PART_COMP "PPCBoot" /* PPCBoot compatibility type */
43 #define DEV_TYPE_UNKNOWN 0xff /* not connected */
44 #define DEV_TYPE_HARDDISK 0x00 /* harddisk */
45 #define DEV_TYPE_TAPE 0x01 /* Tape */
46 #define DEV_TYPE_CDROM 0x05 /* CD-ROM */
47 #define DEV_TYPE_OPDISK 0x07 /* optical disk */
49 typedef struct disk_partition {
50 lbaint_t start; /* # of first block in partition */
51 lbaint_t size; /* number of blocks in partition */
52 ulong blksz; /* block size in bytes */
53 uchar name[32]; /* partition name */
54 uchar type[32]; /* string type description */
55 int bootable; /* Active/Bootable flag is set */
56 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
57 char uuid[37]; /* filesystem UUID as string, if exists */
59 #ifdef CONFIG_PARTITION_TYPE_GUID
60 char type_guid[37]; /* type GUID as string, if exists */
62 #ifdef CONFIG_DOS_PARTITION
63 uchar sys_ind; /* partition type */
67 /* Misc _get_dev functions */
68 #ifdef CONFIG_PARTITIONS
70 * blk_get_dev() - get a pointer to a block device given its type and number
72 * Each interface allocates its own devices and typically struct blk_desc is
73 * contained with the interface's data structure. There is no global
74 * numbering for block devices, so the interface name must be provided.
76 * @ifname: Interface name (e.g. "ide", "scsi")
77 * @dev: Device number (0 for first device on that interface, 1 for
79 * @return pointer to the block device, or NULL if not available, or an
82 struct blk_desc *blk_get_dev(const char *ifname, int dev);
84 struct blk_desc *mg_disk_get_dev(int dev);
85 int host_get_dev_err(int dev, struct blk_desc **blk_devp);
88 int part_get_info(struct blk_desc *dev_desc, int part, disk_partition_t *info);
89 void part_print(struct blk_desc *dev_desc);
90 void part_init(struct blk_desc *dev_desc);
91 void dev_print(struct blk_desc *dev_desc);
94 * blk_get_device_by_str() - Get a block device given its interface/hw partition
96 * Each interface allocates its own devices and typically struct blk_desc is
97 * contained with the interface's data structure. There is no global
98 * numbering for block devices, so the interface name must be provided.
100 * The hardware parition is not related to the normal software partitioning
101 * of a device - each hardware partition is effectively a separately
102 * accessible block device. When a hardware parition is selected on MMC the
103 * other hardware partitions become inaccessible. The same block device is
104 * used to access all hardware partitions, but its capacity may change when a
105 * different hardware partition is selected.
107 * When a hardware partition number is given, the block device switches to
108 * that hardware partition.
110 * @ifname: Interface name (e.g. "ide", "scsi")
111 * @dev_str: Device and optional hw partition. This can either be a string
112 * containing the device number (e.g. "2") or the device number
113 * and hardware partition number (e.g. "2.4") for devices that
114 * support it (currently only MMC).
115 * @dev_desc: Returns a pointer to the block device on success
116 * @return block device number (local to the interface), or -1 on error
118 int blk_get_device_by_str(const char *ifname, const char *dev_str,
119 struct blk_desc **dev_desc);
122 * blk_get_device_part_str() - Get a block device and partition
124 * This calls blk_get_device_by_str() to look up a device. It also looks up
125 * a partition and returns information about it.
127 * @dev_part_str is in the format:
128 * <dev>.<hw_part>:<part> where <dev> is the device number,
129 * <hw_part> is the optional hardware partition number and
130 * <part> is the partition number
132 * If ifname is "hostfs" then this function returns the sandbox host block
135 * If ifname is ubi, then this function returns 0, with @info set to a
136 * special UBI device.
138 * If @dev_part_str is NULL or empty or "-", then this function looks up
139 * the "bootdevice" environment variable and uses that string instead.
141 * If the partition string is empty then the first partition is used. If the
142 * partition string is "auto" then the first bootable partition is used.
144 * @ifname: Interface name (e.g. "ide", "scsi")
145 * @dev_part_str: Device and partition string
146 * @dev_desc: Returns a pointer to the block device on success
147 * @info: Returns partition information
148 * @allow_whole_dev: true to allow the user to select partition 0
149 * (which means the whole device), false to require a valid
150 * partition number >= 1
151 * @return partition number, or -1 on error
154 int blk_get_device_part_str(const char *ifname, const char *dev_part_str,
155 struct blk_desc **dev_desc,
156 disk_partition_t *info, int allow_whole_dev);
159 * part_get_info_by_name() - Search for a partition by name
160 * among all available registered partitions
162 * @param dev_desc - block device descriptor
163 * @param gpt_name - the specified table entry name
164 * @param info - returns the disk partition info
166 * @return - '0' on match, '-1' on no match, otherwise error
168 int part_get_info_by_name(struct blk_desc *dev_desc,
169 const char *name, disk_partition_t *info);
172 * part_set_generic_name() - create generic partition like hda1 or sdb2
174 * Helper function for partition tables, which don't hold partition names
175 * (DOS, ISO). Generates partition name out of the device type and partition
178 * @dev_desc: pointer to the block device
179 * @part_num: partition number for which the name is generated
180 * @name: buffer where the name is written
182 void part_set_generic_name(const struct blk_desc *dev_desc,
183 int part_num, char *name);
185 extern const struct block_drvr block_drvr[];
187 static inline struct blk_desc *blk_get_dev(const char *ifname, int dev)
189 static inline struct blk_desc *mg_disk_get_dev(int dev) { return NULL; }
191 static inline int part_get_info(struct blk_desc *dev_desc, int part,
192 disk_partition_t *info) { return -1; }
193 static inline void part_print(struct blk_desc *dev_desc) {}
194 static inline void part_init(struct blk_desc *dev_desc) {}
195 static inline void dev_print(struct blk_desc *dev_desc) {}
196 static inline int blk_get_device_by_str(const char *ifname, const char *dev_str,
197 struct blk_desc **dev_desc)
199 static inline int blk_get_device_part_str(const char *ifname,
200 const char *dev_part_str,
201 struct blk_desc **dev_desc,
202 disk_partition_t *info,
204 { *dev_desc = NULL; return -1; }
208 * We don't support printing partition information in SPL and only support
209 * getting partition information in a few cases.
211 #ifdef CONFIG_SPL_BUILD
212 # define part_print_ptr(x) NULL
213 # if defined(CONFIG_SPL_EXT_SUPPORT) || defined(CONFIG_SPL_FAT_SUPPORT) || \
214 defined(CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION)
215 # define part_get_info_ptr(x) x
217 # define part_get_info_ptr(x) NULL
220 #define part_print_ptr(x) x
221 #define part_get_info_ptr(x) x
228 const int max_entries; /* maximum number of entries to search */
231 * get_info() - Get information about a partition
233 * @dev_desc: Block device descriptor
234 * @part: Partition number (1 = first)
235 * @info: Returns partition information
237 int (*get_info)(struct blk_desc *dev_desc, int part,
238 disk_partition_t *info);
241 * print() - Print partition information
243 * @dev_desc: Block device descriptor
245 void (*print)(struct blk_desc *dev_desc);
248 * test() - Test if a device contains this partition type
250 * @dev_desc: Block device descriptor
251 * @return 0 if the block device appears to contain this partition
254 int (*test)(struct blk_desc *dev_desc);
257 /* Declare a new U-Boot partition 'driver' */
258 #define U_BOOT_PART_TYPE(__name) \
259 ll_entry_declare(struct part_driver, __name, part_driver)
261 #if CONFIG_IS_ENABLED(EFI_PARTITION)
262 #include <part_efi.h>
263 /* disk/part_efi.c */
265 * write_gpt_table() - Write the GUID Partition Table to disk
267 * @param dev_desc - block device descriptor
268 * @param gpt_h - pointer to GPT header representation
269 * @param gpt_e - pointer to GPT partition table entries
271 * @return - zero on success, otherwise error
273 int write_gpt_table(struct blk_desc *dev_desc,
274 gpt_header *gpt_h, gpt_entry *gpt_e);
277 * gpt_fill_pte(): Fill the GPT partition table entry
279 * @param gpt_h - GPT header representation
280 * @param gpt_e - GPT partition table entries
281 * @param partitions - list of partitions
282 * @param parts - number of partitions
284 * @return zero on success
286 int gpt_fill_pte(gpt_header *gpt_h, gpt_entry *gpt_e,
287 disk_partition_t *partitions, int parts);
290 * gpt_fill_header(): Fill the GPT header
292 * @param dev_desc - block device descriptor
293 * @param gpt_h - GPT header representation
294 * @param str_guid - disk guid string representation
295 * @param parts_count - number of partitions
297 * @return - error on str_guid conversion error
299 int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h,
300 char *str_guid, int parts_count);
303 * gpt_restore(): Restore GPT partition table
305 * @param dev_desc - block device descriptor
306 * @param str_disk_guid - disk GUID
307 * @param partitions - list of partitions
308 * @param parts - number of partitions
310 * @return zero on success
312 int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid,
313 disk_partition_t *partitions, const int parts_count);
316 * is_valid_gpt_buf() - Ensure that the Primary GPT information is valid
318 * @param dev_desc - block device descriptor
319 * @param buf - buffer which contains the MBR and Primary GPT info
321 * @return - '0' on success, otherwise error
323 int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf);
326 * write_mbr_and_gpt_partitions() - write MBR, Primary GPT and Backup GPT
328 * @param dev_desc - block device descriptor
329 * @param buf - buffer which contains the MBR and Primary GPT info
331 * @return - '0' on success, otherwise error
333 int write_mbr_and_gpt_partitions(struct blk_desc *dev_desc, void *buf);
336 * gpt_verify_headers() - Function to read and CRC32 check of the GPT's header
337 * and partition table entries (PTE)
339 * As a side effect if sets gpt_head and gpt_pte so they point to GPT data.
341 * @param dev_desc - block device descriptor
342 * @param gpt_head - pointer to GPT header data read from medium
343 * @param gpt_pte - pointer to GPT partition table enties read from medium
345 * @return - '0' on success, otherwise error
347 int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head,
348 gpt_entry **gpt_pte);
351 * gpt_verify_partitions() - Function to check if partitions' name, start and
352 * size correspond to '$partitions' env variable
354 * This function checks if on medium stored GPT data is in sync with information
355 * provided in '$partitions' environment variable. Specificially, name, start
356 * and size of the partition is checked.
358 * @param dev_desc - block device descriptor
359 * @param partitions - partition data read from '$partitions' env variable
360 * @param parts - number of partitions read from '$partitions' env variable
361 * @param gpt_head - pointer to GPT header data read from medium
362 * @param gpt_pte - pointer to GPT partition table enties read from medium
364 * @return - '0' on success, otherwise error
366 int gpt_verify_partitions(struct blk_desc *dev_desc,
367 disk_partition_t *partitions, int parts,
368 gpt_header *gpt_head, gpt_entry **gpt_pte);
371 #if CONFIG_IS_ENABLED(DOS_PARTITION)
373 * is_valid_dos_buf() - Ensure that a DOS MBR image is valid
375 * @param buf - buffer which contains the MBR
377 * @return - '0' on success, otherwise error
379 int is_valid_dos_buf(void *buf);
382 * write_mbr_partition() - write DOS MBR
384 * @param dev_desc - block device descriptor
385 * @param buf - buffer which contains the MBR
387 * @return - '0' on success, otherwise error
389 int write_mbr_partition(struct blk_desc *dev_desc, void *buf);