efi: Move more common stub code into the common file

Pull in several functions which are identical in the ARM and x86 files.

Signed-off-by: Simon Glass <sjg@chromium.org>

include/efi_stub.h

@@ -10,6 +10,8 @@
 
 #include <linux/types.h>
 
+struct efi_priv;
+
 enum efi_entry_t {
 	EFIET_END,	/* Signals this is the last (empty) entry */
 	EFIET_MEMORY_MAP,
@@ -64,4 +66,38 @@ int dram_init_banksize_from_efi(void);
  */
 void efi_add_known_memory_from_efi(void);
 
+/**
+ * setup_info_table() - sets up a table containing information from EFI
+ *
+ * We must call exit_boot_services() before jumping out of the stub into U-Boot
+ * proper, so that U-Boot has full control of peripherals, memory, etc.
+ *
+ * Once we do this, we cannot call any boot-services functions so we must find
+ * out everything we need to before doing that.
+ *
+ * Set up a struct efi_info_hdr table which can hold various records (e.g.
+ * struct efi_entry_memmap) with information obtained from EFI.
+ *
+ * @priv: Pointer to our private information which contains the list
+ * @size: Size of the table to allocate
+ * Return: 0 if OK, non-zero on error
+ */
+int setup_info_table(struct efi_priv *priv, int size);
+
+/**
+ * add_entry_addr() - Add a new entry to the efi_info list
+ *
+ * This adds an entry, consisting of a tag and two lots of data. This avoids the
+ * caller having to coalesce the data first
+ *
+ * @priv: Pointer to our private information which contains the list
+ * @type: Type of the entry to add
+ * @ptr1: Pointer to first data block to add
+ * @size1: Size of first data block in bytes (can be 0)
+ * @ptr2: Pointer to second data block to add
+ * @size2: Size of second data block in bytes (can be 0)
+ */
+void add_entry_addr(struct efi_priv *priv, enum efi_entry_t type, void *ptr1,
+		    int size1, void *ptr2, int size2);
+
 #endif /* _EFI_STUB_H */