[RESEND RFC PATCH 01/10] GPT: Add function to get gpt header and partition entries

[Sughosh Ganu]

Add function to get the gpt header and partition entries filled. These
would be used subsequently for multi bank firmware update support on
devices where the images reside on GPT partitions.

Signed-off-by: Sughosh Ganu <sughosh.ganu at linaro.org>
---
 disk/part_efi.c | 10 ++++++++++
 include/part.h  | 14 ++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/disk/part_efi.c b/disk/part_efi.c
index 0ca7effc32..792b9218a9 100644
--- a/disk/part_efi.c
+++ b/disk/part_efi.c
@@ -216,6 +216,16 @@ int get_disk_guid(struct blk_desc * dev_desc, char *guid)
 	return 0;
 }
 
+int get_gpt_hdr_parts(struct blk_desc *desc, gpt_header *gpt_head,
+		      gpt_entry **gpt_pte)
+{
+	/* This function validates and fills in the GPT header and PTE's */
+	if (find_valid_gpt(desc, gpt_head, gpt_pte) != 1)
+		return -EINVAL;
+
+	return 0;
+}
+
 void part_print_efi(struct blk_desc *dev_desc)
 {
 	ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
diff --git a/include/part.h b/include/part.h
index b66b07a1f0..8e86485b97 100644
--- a/include/part.h
+++ b/include/part.h
@@ -345,6 +345,20 @@ struct part_driver {
 
 #if CONFIG_IS_ENABLED(EFI_PARTITION)
 /* disk/part_efi.c */
+
+/**
+ * get_gpt_hdr_parts() - Get information on the GPT Header and
+ *                       Partition Table Entries
+ *
+ * @param desc - block device descriptor
+ * @param gpt_h - pointer to GPT header representation
+ * @param gpt_e - pointer to GPT partition table entries
+ *
+ * @return - zero on success, otherwise error
+ */
+int get_gpt_hdr_parts(struct blk_desc *desc, gpt_header *gpt_head,
+		      gpt_entry **gpt_pte);
+
 /**
  * write_gpt_table() - Write the GUID Partition Table to disk
  *
-- 
2.17.1