diff options
| -rw-r--r-- | disk/part_dos.c | 12 | ||||
| -rw-r--r-- | disk/part_efi.c | 20 | ||||
| -rw-r--r-- | include/blk.h | 18 |
3 files changed, 47 insertions, 3 deletions
diff --git a/disk/part_dos.c b/disk/part_dos.c index 7aff73d6f8c..1a36be0446a 100644 --- a/disk/part_dos.c +++ b/disk/part_dos.c @@ -89,14 +89,20 @@ static int test_block_type(unsigned char *buffer) static int part_test_dos(struct blk_desc *dev_desc) { - ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz); + ALLOC_CACHE_ALIGN_BUFFER(legacy_mbr, mbr, dev_desc->blksz); - if (blk_dread(dev_desc, 0, 1, (ulong *)buffer) != 1) + if (blk_dread(dev_desc, 0, 1, (ulong *)mbr) != 1) return -1; - if (test_block_type(buffer) != DOS_MBR) + if (test_block_type((unsigned char *)mbr) != DOS_MBR) return -1; + if (dev_desc->sig_type == SIG_TYPE_NONE && + mbr->unique_mbr_signature != 0) { + dev_desc->sig_type = SIG_TYPE_MBR; + dev_desc->mbr_sig = mbr->unique_mbr_signature; + } + return 0; } diff --git a/disk/part_efi.c b/disk/part_efi.c index 2973d52f6ab..208bb14ee88 100644 --- a/disk/part_efi.c +++ b/disk/part_efi.c @@ -923,11 +923,19 @@ static int is_pmbr_valid(legacy_mbr * mbr) static int is_gpt_valid(struct blk_desc *dev_desc, u64 lba, gpt_header *pgpt_head, gpt_entry **pgpt_pte) { + ALLOC_CACHE_ALIGN_BUFFER(legacy_mbr, mbr, dev_desc->blksz); + if (!dev_desc || !pgpt_head) { printf("%s: Invalid Argument(s)\n", __func__); return 0; } + /* Read MBR Header from device */ + if (blk_dread(dev_desc, 0, 1, (ulong *)mbr) != 1) { + printf("*** ERROR: Can't read MBR header ***\n"); + return 0; + } + /* Read GPT Header from device */ if (blk_dread(dev_desc, (lbaint_t)lba, 1, pgpt_head) != 1) { printf("*** ERROR: Can't read GPT header ***\n"); @@ -937,6 +945,18 @@ static int is_gpt_valid(struct blk_desc *dev_desc, u64 lba, if (validate_gpt_header(pgpt_head, (lbaint_t)lba, dev_desc->lba)) return 0; + if (dev_desc->sig_type == SIG_TYPE_NONE) { + efi_guid_t empty = {}; + if (memcmp(&pgpt_head->disk_guid, &empty, sizeof(empty))) { + dev_desc->sig_type = SIG_TYPE_GUID; + memcpy(&dev_desc->guid_sig, &pgpt_head->disk_guid, + sizeof(empty)); + } else if (mbr->unique_mbr_signature != 0) { + dev_desc->sig_type = SIG_TYPE_MBR; + dev_desc->mbr_sig = mbr->unique_mbr_signature; + } + } + /* Read and allocate Partition Table Entries */ *pgpt_pte = alloc_read_gpt_entries(dev_desc, pgpt_head); if (*pgpt_pte == NULL) { diff --git a/include/blk.h b/include/blk.h index 1965812a9d5..41b4d7efa82 100644 --- a/include/blk.h +++ b/include/blk.h @@ -8,6 +8,8 @@ #ifndef BLK_H #define BLK_H +#include <efi.h> + #ifdef CONFIG_SYS_64BIT_LBA typedef uint64_t lbaint_t; #define LBAFlength "ll" @@ -41,6 +43,17 @@ enum if_type { #define BLK_REV_SIZE 8 /* + * Identifies the partition table type (ie. MBR vs GPT GUID) signature + */ +enum sig_type { + SIG_TYPE_NONE, + SIG_TYPE_MBR, + SIG_TYPE_GUID, + + SIG_TYPE_COUNT /* Number of signature types */ +}; + +/* * With driver model (CONFIG_BLK) this is uclass platform data, accessible * with dev_get_uclass_platdata(dev) */ @@ -67,6 +80,11 @@ struct blk_desc { char vendor[BLK_VEN_SIZE + 1]; /* device vendor string */ char product[BLK_PRD_SIZE + 1]; /* device product number */ char revision[BLK_REV_SIZE + 1]; /* firmware revision */ + enum sig_type sig_type; /* Partition table signature type */ + union { + uint32_t mbr_sig; /* MBR integer signature */ + efi_guid_t guid_sig; /* GPT GUID Signature */ + }; #if CONFIG_IS_ENABLED(BLK) /* * For now we have a few functions which take struct blk_desc as a |