X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=disk%2Fpart_efi.c;h=71c3cb3f78d9fbffae660c019cfa54d3bb4ef7e1;hb=ad8afeaee041429f30989348d287306cfa25f4e5;hp=db0c890d5b449987e2a4f1a530bfa8f2341476bc;hpb=f9515756b6d76cde99b385dda905dfb20d31ea48;p=u-boot

diff --git a/disk/part_efi.c b/disk/part_efi.c
index db0c890d5b..71c3cb3f78 100644
--- a/disk/part_efi.c
+++ b/disk/part_efi.c
@@ -13,11 +13,13 @@
 #include <asm/unaligned.h>
 #include <common.h>
 #include <command.h>
+#include <fdtdec.h>
 #include <ide.h>
 #include <inttypes.h>
 #include <malloc.h>
 #include <memalign.h>
 #include <part_efi.h>
+#include <linux/compiler.h>
 #include <linux/ctype.h>
 
 DECLARE_GLOBAL_DATA_PTR;
@@ -176,12 +178,43 @@ static void prepare_backup_gpt_header(gpt_header *gpt_h)
  * Public Functions (include/part.h)
  */
 
+/*
+ * UUID is displayed as 32 hexadecimal digits, in 5 groups,
+ * separated by hyphens, in the form 8-4-4-4-12 for a total of 36 characters
+ */
+int get_disk_guid(struct blk_desc * dev_desc, char *guid)
+{
+	ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
+	gpt_entry *gpt_pte = NULL;
+	unsigned char *guid_bin;
+
+	/* This function validates AND fills in the GPT header and PTE */
+	if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
+			 gpt_head, &gpt_pte) != 1) {
+		printf("%s: *** ERROR: Invalid GPT ***\n", __func__);
+		if (is_gpt_valid(dev_desc, dev_desc->lba - 1,
+				 gpt_head, &gpt_pte) != 1) {
+			printf("%s: *** ERROR: Invalid Backup GPT ***\n",
+			       __func__);
+			return -EINVAL;
+		} else {
+			printf("%s: ***        Using Backup GPT ***\n",
+			       __func__);
+		}
+	}
+
+	guid_bin = gpt_head->disk_guid.b;
+	uuid_bin_to_str(guid_bin, guid, UUID_STR_FORMAT_GUID);
+
+	return 0;
+}
+
 void part_print_efi(struct blk_desc *dev_desc)
 {
 	ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
 	gpt_entry *gpt_pte = NULL;
 	int i = 0;
-	char uuid[37];
+	char uuid[UUID_STR_LEN + 1];
 	unsigned char *uuid_bin;
 
 	/* This function validates AND fills in the GPT header and PTE */
@@ -373,8 +406,8 @@ int write_gpt_table(struct blk_desc *dev_desc,
 	if (blk_dwrite(dev_desc, 1, 1, gpt_h) != 1)
 		goto err;
 
-	if (blk_dwrite(dev_desc, 2, pte_blk_cnt, gpt_e)
-	    != pte_blk_cnt)
+	if (blk_dwrite(dev_desc, le64_to_cpu(gpt_h->partition_entry_lba),
+		       pte_blk_cnt, gpt_e) != pte_blk_cnt)
 		goto err;
 
 	prepare_backup_gpt_header(gpt_h);
@@ -498,6 +531,49 @@ int gpt_fill_pte(gpt_header *gpt_h, gpt_entry *gpt_e,
 	return 0;
 }
 
+static uint32_t partition_entries_offset(struct blk_desc *dev_desc)
+{
+	uint32_t offset_blks = 2;
+	int __maybe_unused config_offset;
+
+#if defined(CONFIG_EFI_PARTITION_ENTRIES_OFF)
+	/*
+	 * Some architectures require their SPL loader at a fixed
+	 * address within the first 16KB of the disk.  To avoid an
+	 * overlap with the partition entries of the EFI partition
+	 * table, the first safe offset (in bytes, from the start of
+	 * the disk) for the entries can be set in
+	 * CONFIG_EFI_PARTITION_ENTRIES_OFF.
+	 */
+	offset_blks =
+		PAD_TO_BLOCKSIZE(CONFIG_EFI_PARTITION_ENTRIES_OFF, dev_desc);
+#endif
+
+#if defined(CONFIG_OF_CONTROL)
+	/*
+	 * Allow the offset of the first partition entires (in bytes
+	 * from the start of the device) to be specified as a property
+	 * of the device tree '/config' node.
+	 */
+	config_offset = fdtdec_get_config_int(gd->fdt_blob,
+					      "u-boot,efi-partition-entries-offset",
+					      -EINVAL);
+	if (config_offset != -EINVAL)
+		offset_blks = PAD_TO_BLOCKSIZE(config_offset, dev_desc);
+#endif
+
+	debug("efi: partition entries offset (in blocks): %d\n", offset_blks);
+
+	/*
+	 * The earliest LBA this can be at is LBA#2 (i.e. right behind
+	 * the (protective) MBR and the GPT header.
+	 */
+	if (offset_blks < 2)
+		offset_blks = 2;
+
+	return offset_blks;
+}
+
 int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h,
 		char *str_guid, int parts_count)
 {
@@ -506,9 +582,11 @@ int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h,
 	gpt_h->header_size = cpu_to_le32(sizeof(gpt_header));
 	gpt_h->my_lba = cpu_to_le64(1);
 	gpt_h->alternate_lba = cpu_to_le64(dev_desc->lba - 1);
-	gpt_h->first_usable_lba = cpu_to_le64(34);
 	gpt_h->last_usable_lba = cpu_to_le64(dev_desc->lba - 34);
-	gpt_h->partition_entry_lba = cpu_to_le64(2);
+	gpt_h->partition_entry_lba =
+		cpu_to_le64(partition_entries_offset(dev_desc));
+	gpt_h->first_usable_lba =
+		cpu_to_le64(le64_to_cpu(gpt_h->partition_entry_lba) + 32);
 	gpt_h->num_partition_entries = cpu_to_le32(GPT_ENTRY_NUMBERS);
 	gpt_h->sizeof_partition_entry = cpu_to_le32(sizeof(gpt_entry));
 	gpt_h->header_crc32 = 0;