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 #ifdef CONFIG_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 */
64 /* Misc _get_dev functions */
65 #ifdef CONFIG_PARTITIONS
67 * blk_get_dev() - get a pointer to a block device given its type and number
69 * Each interface allocates its own devices and typically struct blk_desc is
70 * contained with the interface's data structure. There is no global
71 * numbering for block devices, so the interface name must be provided.
73 * @ifname: Interface name (e.g. "ide", "scsi")
74 * @dev: Device number (0 for first device on that interface, 1 for
76 * @return pointer to the block device, or NULL if not available, or an
79 struct blk_desc *blk_get_dev(const char *ifname, int dev);
81 struct blk_desc *mg_disk_get_dev(int dev);
82 int host_get_dev_err(int dev, struct blk_desc **blk_devp);
85 int part_get_info(struct blk_desc *dev_desc, int part, disk_partition_t *info);
86 void part_print(struct blk_desc *dev_desc);
87 void part_init(struct blk_desc *dev_desc);
88 void dev_print(struct blk_desc *dev_desc);
91 * blk_get_device_by_str() - Get a block device given its interface/hw partition
93 * Each interface allocates its own devices and typically struct blk_desc is
94 * contained with the interface's data structure. There is no global
95 * numbering for block devices, so the interface name must be provided.
97 * The hardware parition is not related to the normal software partitioning
98 * of a device - each hardware partition is effectively a separately
99 * accessible block device. When a hardware parition is selected on MMC the
100 * other hardware partitions become inaccessible. The same block device is
101 * used to access all hardware partitions, but its capacity may change when a
102 * different hardware partition is selected.
104 * When a hardware partition number is given, the block device switches to
105 * that hardware partition.
107 * @ifname: Interface name (e.g. "ide", "scsi")
108 * @dev_str: Device and optional hw partition. This can either be a string
109 * containing the device number (e.g. "2") or the device number
110 * and hardware partition number (e.g. "2.4") for devices that
111 * support it (currently only MMC).
112 * @dev_desc: Returns a pointer to the block device on success
113 * @return block device number (local to the interface), or -1 on error
115 int blk_get_device_by_str(const char *ifname, const char *dev_str,
116 struct blk_desc **dev_desc);
119 * blk_get_device_part_str() - Get a block device and partition
121 * This calls blk_get_device_by_str() to look up a device. It also looks up
122 * a partition and returns information about it.
124 * @dev_part_str is in the format:
125 * <dev>.<hw_part>:<part> where <dev> is the device number,
126 * <hw_part> is the optional hardware partition number and
127 * <part> is the partition number
129 * If ifname is "hostfs" then this function returns the sandbox host block
132 * If ifname is ubi, then this function returns 0, with @info set to a
133 * special UBI device.
135 * If @dev_part_str is NULL or empty or "-", then this function looks up
136 * the "bootdevice" environment variable and uses that string instead.
138 * If the partition string is empty then the first partition is used. If the
139 * partition string is "auto" then the first bootable partition is used.
141 * @ifname: Interface name (e.g. "ide", "scsi")
142 * @dev_part_str: Device and partition string
143 * @dev_desc: Returns a pointer to the block device on success
144 * @info: Returns partition information
145 * @allow_whole_dev: true to allow the user to select partition 0
146 * (which means the whole device), false to require a valid
147 * partition number >= 1
148 * @return partition number, or -1 on error
151 int blk_get_device_part_str(const char *ifname, const char *dev_part_str,
152 struct blk_desc **dev_desc,
153 disk_partition_t *info, int allow_whole_dev);
156 * part_get_info_by_name() - Search for a partition by name
157 * among all available registered partitions
159 * @param dev_desc - block device descriptor
160 * @param gpt_name - the specified table entry name
161 * @param info - returns the disk partition info
163 * @return - '0' on match, '-1' on no match, otherwise error
165 int part_get_info_by_name(struct blk_desc *dev_desc,
166 const char *name, disk_partition_t *info);
169 * part_set_generic_name() - create generic partition like hda1 or sdb2
171 * Helper function for partition tables, which don't hold partition names
172 * (DOS, ISO). Generates partition name out of the device type and partition
175 * @dev_desc: pointer to the block device
176 * @part_num: partition number for which the name is generated
177 * @name: buffer where the name is written
179 void part_set_generic_name(const struct blk_desc *dev_desc,
180 int part_num, char *name);
182 extern const struct block_drvr block_drvr[];
184 static inline struct blk_desc *blk_get_dev(const char *ifname, int dev)
186 static inline struct blk_desc *mg_disk_get_dev(int dev) { return NULL; }
188 static inline int part_get_info(struct blk_desc *dev_desc, int part,
189 disk_partition_t *info) { return -1; }
190 static inline void part_print(struct blk_desc *dev_desc) {}
191 static inline void part_init(struct blk_desc *dev_desc) {}
192 static inline void dev_print(struct blk_desc *dev_desc) {}
193 static inline int blk_get_device_by_str(const char *ifname, const char *dev_str,
194 struct blk_desc **dev_desc)
196 static inline int blk_get_device_part_str(const char *ifname,
197 const char *dev_part_str,
198 struct blk_desc **dev_desc,
199 disk_partition_t *info,
201 { *dev_desc = NULL; return -1; }
205 * We don't support printing partition information in SPL and only support
206 * getting partition information in a few cases.
208 #ifdef CONFIG_SPL_BUILD
209 # define part_print_ptr(x) NULL
210 # if defined(CONFIG_SPL_EXT_SUPPORT) || defined(CONFIG_SPL_FAT_SUPPORT) || \
211 defined(CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION)
212 # define part_get_info_ptr(x) x
214 # define part_get_info_ptr(x) NULL
217 #define part_print_ptr(x) x
218 #define part_get_info_ptr(x) x
225 const int max_entries; /* maximum number of entries to search */
228 * get_info() - Get information about a partition
230 * @dev_desc: Block device descriptor
231 * @part: Partition number (1 = first)
232 * @info: Returns partition information
234 int (*get_info)(struct blk_desc *dev_desc, int part,
235 disk_partition_t *info);
238 * print() - Print partition information
240 * @dev_desc: Block device descriptor
242 void (*print)(struct blk_desc *dev_desc);
245 * test() - Test if a device contains this partition type
247 * @dev_desc: Block device descriptor
248 * @return 0 if the block device appears to contain this partition
251 int (*test)(struct blk_desc *dev_desc);
254 /* Declare a new U-Boot partition 'driver' */
255 #define U_BOOT_PART_TYPE(__name) \
256 ll_entry_declare(struct part_driver, __name, part_driver)
258 #if CONFIG_IS_ENABLED(EFI_PARTITION)
259 #include <part_efi.h>
260 /* disk/part_efi.c */
262 * write_gpt_table() - Write the GUID Partition Table to disk
264 * @param dev_desc - block device descriptor
265 * @param gpt_h - pointer to GPT header representation
266 * @param gpt_e - pointer to GPT partition table entries
268 * @return - zero on success, otherwise error
270 int write_gpt_table(struct blk_desc *dev_desc,
271 gpt_header *gpt_h, gpt_entry *gpt_e);
274 * gpt_fill_pte(): Fill the GPT partition table entry
276 * @param gpt_h - GPT header representation
277 * @param gpt_e - GPT partition table entries
278 * @param partitions - list of partitions
279 * @param parts - number of partitions
281 * @return zero on success
283 int gpt_fill_pte(gpt_header *gpt_h, gpt_entry *gpt_e,
284 disk_partition_t *partitions, int parts);
287 * gpt_fill_header(): Fill the GPT header
289 * @param dev_desc - block device descriptor
290 * @param gpt_h - GPT header representation
291 * @param str_guid - disk guid string representation
292 * @param parts_count - number of partitions
294 * @return - error on str_guid conversion error
296 int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h,
297 char *str_guid, int parts_count);
300 * gpt_restore(): Restore GPT partition table
302 * @param dev_desc - block device descriptor
303 * @param str_disk_guid - disk GUID
304 * @param partitions - list of partitions
305 * @param parts - number of partitions
307 * @return zero on success
309 int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid,
310 disk_partition_t *partitions, const int parts_count);
313 * is_valid_gpt_buf() - Ensure that the Primary GPT information is valid
315 * @param dev_desc - block device descriptor
316 * @param buf - buffer which contains the MBR and Primary GPT info
318 * @return - '0' on success, otherwise error
320 int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf);
323 * write_mbr_and_gpt_partitions() - write MBR, Primary GPT and Backup GPT
325 * @param dev_desc - block device descriptor
326 * @param buf - buffer which contains the MBR and Primary GPT info
328 * @return - '0' on success, otherwise error
330 int write_mbr_and_gpt_partitions(struct blk_desc *dev_desc, void *buf);
333 * gpt_verify_headers() - Function to read and CRC32 check of the GPT's header
334 * and partition table entries (PTE)
336 * As a side effect if sets gpt_head and gpt_pte so they point to GPT data.
338 * @param dev_desc - block device descriptor
339 * @param gpt_head - pointer to GPT header data read from medium
340 * @param gpt_pte - pointer to GPT partition table enties read from medium
342 * @return - '0' on success, otherwise error
344 int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head,
345 gpt_entry **gpt_pte);
348 * gpt_verify_partitions() - Function to check if partitions' name, start and
349 * size correspond to '$partitions' env variable
351 * This function checks if on medium stored GPT data is in sync with information
352 * provided in '$partitions' environment variable. Specificially, name, start
353 * and size of the partition is checked.
355 * @param dev_desc - block device descriptor
356 * @param partitions - partition data read from '$partitions' env variable
357 * @param parts - number of partitions read from '$partitions' env variable
358 * @param gpt_head - pointer to GPT header data read from medium
359 * @param gpt_pte - pointer to GPT partition table enties read from medium
361 * @return - '0' on success, otherwise error
363 int gpt_verify_partitions(struct blk_desc *dev_desc,
364 disk_partition_t *partitions, int parts,
365 gpt_header *gpt_head, gpt_entry **gpt_pte);
368 #if CONFIG_IS_ENABLED(DOS_PARTITION)
370 * is_valid_dos_buf() - Ensure that a DOS MBR image is valid
372 * @param buf - buffer which contains the MBR
374 * @return - '0' on success, otherwise error
376 int is_valid_dos_buf(void *buf);
379 * write_mbr_partition() - write DOS MBR
381 * @param dev_desc - block device descriptor
382 * @param buf - buffer which contains the MBR
384 * @return - '0' on success, otherwise error
386 int write_mbr_partition(struct blk_desc *dev_desc, void *buf);