add boot_get_loadables() to load listed images

Added a trimmed down instance of boot_get_<thing>() to satisfy the
minimum requierments of the added feature.  The function follows the
normal patterns set by other boot_get<thing>'s, which should make it a
bit easier to combine them all together into one boot_get_image()
function in a later refactor.

Documentation for the new function can be found in source:
  include/image.h

Signed-off-by: Karl Apsite <Karl.Apsite@dornerworks.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

1 files changed, 26 insertions, 1 deletions

diff --git a/include/image.h b/include/image.h
index 97b96b3e24..b6eb57e187 100644
--- a/include/image.h
+++ b/include/image.h
@@ -244,6 +244,7 @@ struct lmb;
 #define IH_TYPE_SOCFPGAIMAGE	19	/* Altera SOCFPGA Preloader	*/
 #define IH_TYPE_X86_SETUP	20	/* x86 setup.bin Image		*/
 #define IH_TYPE_LPC32XXIMAGE	21	/* x86 setup.bin Image		*/
+#define IH_TYPE_LOADABLE	22	/* A list of typeless images	*/
 
 /*
  * Compression Types
@@ -455,7 +456,31 @@ ulong genimg_get_image(ulong img_addr);
 
 int boot_get_ramdisk(int argc, char * const argv[], bootm_headers_t *images,
 		uint8_t arch, ulong *rd_start, ulong *rd_end);
-#endif
+
+/**
+ * boot_get_loadable - routine to load a list of binaries to memory
+ * @argc: Ignored Argument
+ * @argv: Ignored Argument
+ * @images: pointer to the bootm images structure
+ * @arch: expected architecture for the image
+ * @ld_start: Ignored Argument
+ * @ld_len: Ignored Argument
+ *
+ * boot_get_loadable() will take the given FIT configuration, and look
+ * for a field named "loadables".  Loadables, is a list of elements in
+ * the FIT given as strings.  exe:
+ *   loadables = "linux_kernel@1", "fdt@2";
+ * this function will attempt to parse each string, and load the
+ * corresponding element from the FIT into memory.  Once placed,
+ * no aditional actions are taken.
+ *
+ * @return:
+ *     0, if only valid images or no images are found
+ *     error code, if an error occurs during fit_image_load
+ */
+int boot_get_loadable(int argc, char * const argv[], bootm_headers_t *images,
+		uint8_t arch, const ulong *ld_start, ulong * const ld_len);
+#endif /* !USE_HOSTCC */
 
 int boot_get_setup_fit(bootm_headers_t *images, uint8_t arch,
 		       ulong *setup_start, ulong *setup_len);