ARC: add support for reserved memory defined by device tree

Enable reserved memory initialization from device tree.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

2 files changed, 5 insertions, 0 deletions

diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index 28d47f8eb934..ec4791ea6911 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -35,6 +35,7 @@ config ARC
         select NO_BOOTMEM
         select OF
         select OF_EARLY_FLATTREE
+        select OF_RESERVED_MEM
         select PERF_USE_VMALLOC
         select HAVE_DEBUG_STACKOVERFLOW
         select HAVE_GENERIC_DMA_COHERENT
diff --git a/arch/arc/mm/init.c b/arch/arc/mm/init.c
index 7d2c4fbf4f22..5487d0b97400 100644
--- a/arch/arc/mm/init.c
+++ b/arch/arc/mm/init.c
@@ -13,6 +13,7 @@
 #ifdef CONFIG_BLK_DEV_INITRD
 #include <linux/initrd.h>
 #endif
+#include <linux/of_fdt.h>
 #include <linux/swap.h>
 #include <linux/module.h>
 #include <linux/highmem.h>
@@ -136,6 +137,9 @@ void __init setup_arch_memory(void)
                 memblock_reserve(__pa(initrd_start), initrd_end - initrd_start);
 #endif
 
+        early_init_fdt_reserve_self();
+        early_init_fdt_scan_reserved_mem();
+
         memblock_dump_all();
 
         /*----------------- node/zones setup --------------------------*/