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part: detect EFI system partition

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Up to now for MBR and GPT partitions the info field 'bootable' was set to 1
if either the partition was an EFI system partition or the bootable flag
was set.

Turn info field 'bootable' into a bit mask with separate bits for bootable
and EFI system partition.

This will allow us to identify the EFI system partition in the UEFI
sub-system.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Heinrich Schuchardt
2020-03-19 13:49:34 +01:00
parent 4fe050e65f
commit 25801acc1f
4 changed files with 32 additions and 13 deletions
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11
include/part.h
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@@ -51,13 +51,22 @@ struct block_drvr {
#define PART_TYPE_LEN 32
#define MAX_SEARCH_PARTITIONS 64
#define PART_BOOTABLE ((int)BIT(0))
#define PART_EFI_SYSTEM_PARTITION ((int)BIT(1))
typedef struct disk_partition {
lbaint_t start; /* # of first block in partition */
lbaint_t size; /* number of blocks in partition */
ulong blksz; /* block size in bytes */
uchar name[PART_NAME_LEN]; /* partition name */
uchar type[PART_TYPE_LEN]; /* string type description */
int bootable; /* Active/Bootable flag is set */
/*
* The bootable is a bitmask with the following fields:
*
* PART_BOOTABLE the MBR bootable flag is set
* PART_EFI_SYSTEM_PARTITION the partition is an EFI system partition
*/
int bootable;
#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
char uuid[UUID_STR_LEN + 1]; /* filesystem UUID as string, if exists */
#endif