arm: setup MM using information from the device tree

Setup memory management, heaps etc. using the location and size of the
first memory bank given in the device tree.

The DTB is also copied so it can be used afterwards.

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Acked-by: Tim Deegan <tim@xen.org>
Committed-by: Ian Campbell <ian.campbell@citrix.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/xen/common/device_tree.c b/xen/common/device_tree.c
index 7d7514dc01..d50cb9cc6b 100644
--- a/xen/common/device_tree.c
+++ b/xen/common/device_tree.c
@@ -22,6 +22,7 @@
 #include <libfdt.h>
 
 struct dt_early_info __initdata early_info;
+void *device_tree_flattened;
 
 static void __init get_val(const u32 **cell, u32 cells, u64 *val)
 {
@@ -126,8 +127,10 @@ static void __init early_print_info(void)
 /**
  * device_tree_early_init - initialize early info from a DTB
  * @fdt: flattened device tree binary
+ *
+ * Returns the size of the DTB.
  */
-void __init device_tree_early_init(const void *fdt)
+size_t __init device_tree_early_init(const void *fdt)
 {
     int ret;
 
@@ -137,6 +140,8 @@ void __init device_tree_early_init(const void *fdt)
 
     early_scan(fdt);
     early_print_info();
+
+    return fdt_totalsize(fdt);
 }
 
 /**