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
32 * Type string for U-Boot bootable partitions
34 #define BOOT_PART_TYPE "U-Boot" /* primary boot partition type */
35 #define BOOT_PART_COMP "PPCBoot" /* PPCBoot compatibility type */
38 #define DEV_TYPE_UNKNOWN 0xff /* not connected */
39 #define DEV_TYPE_HARDDISK 0x00 /* harddisk */
40 #define DEV_TYPE_TAPE 0x01 /* Tape */
41 #define DEV_TYPE_CDROM 0x05 /* CD-ROM */
42 #define DEV_TYPE_OPDISK 0x07 /* optical disk */
44 typedef struct disk_partition {
45 lbaint_t start; /* # of first block in partition */
46 lbaint_t size; /* number of blocks in partition */
47 ulong blksz; /* block size in bytes */
48 uchar name[32]; /* partition name */
49 uchar type[32]; /* string type description */
50 int bootable; /* Active/Bootable flag is set */
51 #ifdef CONFIG_PARTITION_UUIDS
52 char uuid[37]; /* filesystem UUID as string, if exists */
54 #ifdef CONFIG_PARTITION_TYPE_GUID
55 char type_guid[37]; /* type GUID as string, if exists */
59 /* Misc _get_dev functions */
60 #ifdef CONFIG_PARTITIONS
62 * blk_get_dev() - get a pointer to a block device given its type and number
64 * Each interface allocates its own devices and typically struct blk_desc is
65 * contained with the interface's data structure. There is no global
66 * numbering for block devices, so the interface name must be provided.
68 * @ifname: Interface name (e.g. "ide", "scsi")
69 * @dev: Device number (0 for first device on that interface, 1 for
71 * @return pointer to the block device, or NULL if not available, or an
74 struct blk_desc *blk_get_dev(const char *ifname, int dev);
76 struct blk_desc *mg_disk_get_dev(int dev);
77 int host_get_dev_err(int dev, struct blk_desc **blk_devp);
80 int part_get_info(struct blk_desc *dev_desc, int part, disk_partition_t *info);
81 void part_print(struct blk_desc *dev_desc);
82 void part_init(struct blk_desc *dev_desc);
83 void dev_print(struct blk_desc *dev_desc);
86 * blk_get_device_by_str() - Get a block device given its interface/hw partition
88 * Each interface allocates its own devices and typically struct blk_desc is
89 * contained with the interface's data structure. There is no global
90 * numbering for block devices, so the interface name must be provided.
92 * The hardware parition is not related to the normal software partitioning
93 * of a device - each hardware partition is effectively a separately
94 * accessible block device. When a hardware parition is selected on MMC the
95 * other hardware partitions become inaccessible. The same block device is
96 * used to access all hardware partitions, but its capacity may change when a
97 * different hardware partition is selected.
99 * When a hardware partition number is given, the block device switches to
100 * that hardware partition.
102 * @ifname: Interface name (e.g. "ide", "scsi")
103 * @dev_str: Device and optional hw partition. This can either be a string
104 * containing the device number (e.g. "2") or the device number
105 * and hardware partition number (e.g. "2.4") for devices that
106 * support it (currently only MMC).
107 * @dev_desc: Returns a pointer to the block device on success
108 * @return block device number (local to the interface), or -1 on error
110 int blk_get_device_by_str(const char *ifname, const char *dev_str,
111 struct blk_desc **dev_desc);
114 * blk_get_device_part_str() - Get a block device and partition
116 * This calls blk_get_device_by_str() to look up a device. It also looks up
117 * a partition and returns information about it.
119 * @dev_part_str is in the format:
120 * <dev>.<hw_part>:<part> where <dev> is the device number,
121 * <hw_part> is the optional hardware partition number and
122 * <part> is the partition number
124 * If ifname is "hostfs" then this function returns the sandbox host block
127 * If ifname is ubi, then this function returns 0, with @info set to a
128 * special UBI device.
130 * If @dev_part_str is NULL or empty or "-", then this function looks up
131 * the "bootdevice" environment variable and uses that string instead.
133 * If the partition string is empty then the first partition is used. If the
134 * partition string is "auto" then the first bootable partition is used.
136 * @ifname: Interface name (e.g. "ide", "scsi")
137 * @dev_part_str: Device and partition string
138 * @dev_desc: Returns a pointer to the block device on success
139 * @info: Returns partition information
140 * @allow_whole_dev: true to allow the user to select partition 0
141 * (which means the whole device), false to require a valid
142 * partition number >= 1
143 * @return partition number, or -1 on error
146 int blk_get_device_part_str(const char *ifname, const char *dev_part_str,
147 struct blk_desc **dev_desc,
148 disk_partition_t *info, int allow_whole_dev);
149 extern const struct block_drvr block_drvr[];
151 static inline struct blk_desc *blk_get_dev(const char *ifname, int dev)
153 static inline struct blk_desc *mg_disk_get_dev(int dev) { return NULL; }
155 static inline int part_get_info(struct blk_desc *dev_desc, int part,
156 disk_partition_t *info) { return -1; }
157 static inline void part_print(struct blk_desc *dev_desc) {}
158 static inline void part_init(struct blk_desc *dev_desc) {}
159 static inline void dev_print(struct blk_desc *dev_desc) {}
160 static inline int blk_get_device_by_str(const char *ifname, const char *dev_str,
161 struct blk_desc **dev_desc)
163 static inline int blk_get_device_part_str(const char *ifname,
164 const char *dev_part_str,
165 struct blk_desc **dev_desc,
166 disk_partition_t *info,
168 { *dev_desc = NULL; return -1; }
172 * We don't support printing partition information in SPL and only support
173 * getting partition information in a few cases.
175 #ifdef CONFIG_SPL_BUILD
176 # define part_print_ptr(x) NULL
177 # if defined(CONFIG_SPL_EXT_SUPPORT) || defined(CONFIG_SPL_FAT_SUPPORT) || \
178 defined(CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION)
179 # define part_get_info_ptr(x) x
181 # define part_get_info_ptr(x) NULL
184 #define part_print_ptr(x) x
185 #define part_get_info_ptr(x) x
194 * get_info() - Get information about a partition
196 * @dev_desc: Block device descriptor
197 * @part: Partition number (1 = first)
198 * @info: Returns partition information
200 int (*get_info)(struct blk_desc *dev_desc, int part,
201 disk_partition_t *info);
204 * print() - Print partition information
206 * @dev_desc: Block device descriptor
208 void (*print)(struct blk_desc *dev_desc);
211 * test() - Test if a device contains this partition type
213 * @dev_desc: Block device descriptor
214 * @return 0 if the block device appears to contain this partition
217 int (*test)(struct blk_desc *dev_desc);
220 /* Declare a new U-Boot partition 'driver' */
221 #define U_BOOT_PART_TYPE(__name) \
222 ll_entry_declare(struct part_driver, __name, part_driver)
224 #ifdef CONFIG_EFI_PARTITION
225 #include <part_efi.h>
226 /* disk/part_efi.c */
228 * part_get_info_efi_by_name() - Find the specified GPT partition table entry
230 * @param dev_desc - block device descriptor
231 * @param gpt_name - the specified table entry name
232 * @param info - returns the disk partition info
234 * @return - '0' on match, '-1' on no match, otherwise error
236 int part_get_info_efi_by_name(struct blk_desc *dev_desc,
237 const char *name, disk_partition_t *info);
240 * write_gpt_table() - Write the GUID Partition Table to disk
242 * @param dev_desc - block device descriptor
243 * @param gpt_h - pointer to GPT header representation
244 * @param gpt_e - pointer to GPT partition table entries
246 * @return - zero on success, otherwise error
248 int write_gpt_table(struct blk_desc *dev_desc,
249 gpt_header *gpt_h, gpt_entry *gpt_e);
252 * gpt_fill_pte(): Fill the GPT partition table entry
254 * @param gpt_h - GPT header representation
255 * @param gpt_e - GPT partition table entries
256 * @param partitions - list of partitions
257 * @param parts - number of partitions
259 * @return zero on success
261 int gpt_fill_pte(gpt_header *gpt_h, gpt_entry *gpt_e,
262 disk_partition_t *partitions, int parts);
265 * gpt_fill_header(): Fill the GPT header
267 * @param dev_desc - block device descriptor
268 * @param gpt_h - GPT header representation
269 * @param str_guid - disk guid string representation
270 * @param parts_count - number of partitions
272 * @return - error on str_guid conversion error
274 int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h,
275 char *str_guid, int parts_count);
278 * gpt_restore(): Restore GPT partition table
280 * @param dev_desc - block device descriptor
281 * @param str_disk_guid - disk GUID
282 * @param partitions - list of partitions
283 * @param parts - number of partitions
285 * @return zero on success
287 int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid,
288 disk_partition_t *partitions, const int parts_count);
291 * is_valid_gpt_buf() - Ensure that the Primary GPT information is valid
293 * @param dev_desc - block device descriptor
294 * @param buf - buffer which contains the MBR and Primary GPT info
296 * @return - '0' on success, otherwise error
298 int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf);
301 * write_mbr_and_gpt_partitions() - write MBR, Primary GPT and Backup GPT
303 * @param dev_desc - block device descriptor
304 * @param buf - buffer which contains the MBR and Primary GPT info
306 * @return - '0' on success, otherwise error
308 int write_mbr_and_gpt_partitions(struct blk_desc *dev_desc, void *buf);
311 * gpt_verify_headers() - Function to read and CRC32 check of the GPT's header
312 * and partition table entries (PTE)
314 * As a side effect if sets gpt_head and gpt_pte so they point to GPT data.
316 * @param dev_desc - block device descriptor
317 * @param gpt_head - pointer to GPT header data read from medium
318 * @param gpt_pte - pointer to GPT partition table enties read from medium
320 * @return - '0' on success, otherwise error
322 int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head,
323 gpt_entry **gpt_pte);
326 * gpt_verify_partitions() - Function to check if partitions' name, start and
327 * size correspond to '$partitions' env variable
329 * This function checks if on medium stored GPT data is in sync with information
330 * provided in '$partitions' environment variable. Specificially, name, start
331 * and size of the partition is checked.
333 * @param dev_desc - block device descriptor
334 * @param partitions - partition data read from '$partitions' env variable
335 * @param parts - number of partitions read from '$partitions' env variable
336 * @param gpt_head - pointer to GPT header data read from medium
337 * @param gpt_pte - pointer to GPT partition table enties read from medium
339 * @return - '0' on success, otherwise error
341 int gpt_verify_partitions(struct blk_desc *dev_desc,
342 disk_partition_t *partitions, int parts,
343 gpt_header *gpt_head, gpt_entry **gpt_pte);