fdt: Decode memory section from fdt.

BUG=chromium-os:17950
TEST=build without error, pending test until we use it to clear the ram regions.

Change-Id: Icf7695e7ca512541dc77cd84397818e6392f2e9a
Reviewed-on: http://gerrit.chromium.org/gerrit/4479
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Tom Wai-Hong Tam <waihong@chromium.org>

1 files changed, 14 insertions, 0 deletions

diff --git a/include/fdt_decode.h b/include/fdt_decode.h
index 45072df9bc..84c2ffb1bf 100644
--- a/include/fdt_decode.h
+++ b/include/fdt_decode.h
@@ -42,6 +42,12 @@ typedef u32 addr_t;
 #define addr_to_cpu(reg) be32_to_cpu(reg)
 #endif
 
+/* Information obtained about memory from the FDT */
+struct fdt_memory {
+	addr_t start;
+	addr_t end;
+};
+
 /**
  * Compat types that we know about and for which we might have drivers.
  * Each is named COMPAT_<dir>_<filename> where <dir> is the directory
@@ -200,6 +206,14 @@ struct fdt_i2c {
 };
 
 /**
+ * Returns information from the FDT about the memory.
+ *
+ * @param blob          FDT blob to use
+ * @param config        structure to use to return information
+ */
+int fdt_decode_memory(const void *blob, struct fdt_memory *config);
+
+/**
  * Return information from the FDT about the console UART. This looks for
  * an alias node called 'console' which must point to a UART. It then reads
  * out the following attributes: