selfload: check target memory type in selfload_check

Currently, selflock_check() verifies that the binary is loaded in an
usable RAM area.

Extend its functionality so we can also check that BL31 is loaded in
a manually reserved area, and fail early if the range is not protected.

Change-Id: Iecdeedd9e8da67f73ac47d2a82e85b306469a626
Signed-off-by: Ting Shen <phoenixshen@google.com>
Reviewed-on: https://review.coreboot.org/c/31122
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

src/include/bootmem.h

@@ -94,8 +94,11 @@ bool bootmem_walk_os_mem(range_action_t action, void *arg);
  */
 bool bootmem_walk(range_action_t action, void *arg);
 
-/* Return 1 if region targets usable RAM, 0 otherwise. */
-int bootmem_region_targets_usable_ram(uint64_t start, uint64_t size);
+/* Returns 1 if the requested memory range is all tagged as type dest_type.
+ * Otherwise returns 0.
+ */
+int bootmem_region_targets_type(uint64_t start, uint64_t size,
+		enum bootmem_type dest_type);
 
 /* Allocate a temporary buffer from the unused RAM areas. */
 void *bootmem_allocate_buffer(size_t size);

src/include/program_loading.h

@@ -16,6 +16,7 @@
 #ifndef PROGRAM_LOADING_H
 #define PROGRAM_LOADING_H
 
+#include <bootmem.h>
 #include <commonlib/region.h>
 #include <stdint.h>
 #include <stddef.h>
@@ -206,7 +207,7 @@ void mirror_payload(struct prog *payload);
  *
  * Defined in src/lib/selfboot.c
  */
-bool selfload_check(struct prog *payload);
+bool selfload_check(struct prog *payload, enum bootmem_type dest_type);
 bool selfload(struct prog *payload);
 
 #endif /* PROGRAM_LOADING_H */