efi: Add a way to obtain boot services in the app

Add a function to return this information along with a stub for the
efi_info_get() function, since calling it otherwise hangs U-Boot.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Signed-off-by: NHeinrich Schuchardt <xypron.glpk@gmx.de>

include/efi.h

@@ -444,9 +444,15 @@ extern char _binary_u_boot_bin_start[], _binary_u_boot_bin_end[];
  *
  * @return pointer to EFI system table
  */
-
 struct efi_system_table *efi_get_sys_table(void);
 
+/**
+ * efi_get_boot() - Get access to the EFI boot services table
+ *
+ * @return pointer to EFI boot services table
+ */
+struct efi_boot_services *efi_get_boot(void);
+
 /**
  * efi_get_ram_base() - Find the base of RAM
  *

lib/efi/efi_app.c

@@ -31,11 +31,21 @@ struct efi_system_table *efi_get_sys_table(void)
 	return global_priv->sys_table;
 }
 
+struct efi_boot_services *efi_get_boot(void)
+{
+	return global_priv->boot;
+}
+
 unsigned long efi_get_ram_base(void)
 {
 	return global_priv->ram_base;
 }
 
+int efi_info_get(enum efi_entry_t type, void **datap, int *sizep)
+{
+	return -ENOSYS;
+}
+
 static efi_status_t setup_memory(struct efi_priv *priv)
 {
 	struct efi_boot_services *boot = priv->boot;