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disk: part_efi: parse and store partition UUID

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Each EFI partition table entry contains a UUID. Extend U-Boot's struct
disk_partition to be able to store this information, and modify
get_partition_info_efi() to fill it in.

The implementation of uuid_string() was derived from the Linux kernel,
tag v3.6-rc4 file lib/vsprintf.c function uuid_string().

Signed-off-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Stephen Warren 2012-09-21 09:50:59 +00:00 committed by Tom Rini
parent c04d68c694
commit 894bfbbfb7
3 changed files with 33 additions and 0 deletions
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5
disk/part.c
View File

@ -391,6 +391,11 @@ int get_partition_info(block_dev_desc_t *dev_desc, int part
defined(CONFIG_MMC) || \
defined(CONFIG_SYSTEMACE)
#ifdef CONFIG_PARTITION_UUIDS
/* The common case is no UUID support */
info->uuid[0] = 0;
#endif
switch (dev_desc->part_type) {
#ifdef CONFIG_MAC_PARTITION
case PART_TYPE_MAC:

25
disk/part_efi.c
View File

@ -154,6 +154,28 @@ void print_part_efi(block_dev_desc_t * dev_desc)
return;
}
#ifdef CONFIG_PARTITION_UUIDS
static void uuid_string(unsigned char *uuid, char *str)
{
static const u8 le[16] = {3, 2, 1, 0, 5, 4, 7, 6, 8, 9, 10, 11,
12, 13, 14, 15};
int i;
for (i = 0; i < 16; i++) {
sprintf(str, "%02x", uuid[le[i]]);
str += 2;
switch (i) {
case 3:
case 5:
case 7:
case 9:
*str++ = '-';
break;
}
}
}
#endif
int get_partition_info_efi(block_dev_desc_t * dev_desc, int part,
disk_partition_t * info)
{
@ -190,6 +212,9 @@ int get_partition_info_efi(block_dev_desc_t * dev_desc, int part,
sprintf((char *)info->name, "%s",
print_efiname(&gpt_pte[part - 1]));
sprintf((char *)info->type, "U-Boot");
#ifdef CONFIG_PARTITION_UUIDS
uuid_string(gpt_pte[part - 1].unique_partition_guid.b, info->uuid);
#endif
debug("%s: start 0x%lX, size 0x%lX, name %s", __func__,
info->start, info->size, info->name);

3
include/part.h
View File

@ -94,6 +94,9 @@ typedef struct disk_partition {
uchar name[32]; /* partition name */
uchar type[32]; /* string type description */
int bootable; /* Active/Bootable flag is set */
#ifdef CONFIG_PARTITION_UUIDS
char uuid[37]; /* filesystem UUID as string, if exists */
#endif
} disk_partition_t;
/* Misc _get_dev functions */