[ramips] share memory size detection code

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@17454 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 18 insertions, 0 deletions

diff --git a/target/linux/ramips/files/arch/mips/ralink/common/setup.c b/target/linux/ramips/files/arch/mips/ralink/common/setup.c
index 6440ccb01..86e951ca2 100644
--- a/target/linux/ramips/files/arch/mips/ralink/common/setup.c
+++ b/target/linux/ramips/files/arch/mips/ralink/common/setup.c
@@ -13,12 +13,30 @@
 #include <linux/init.h>
 #include <linux/io.h>
 
+#include <asm/bootinfo.h>
 #include <asm/addrspace.h>
+
 #include <asm/mach-ralink/common.h>
+#include <ralink_soc.h>
+
+static void __init detect_mem_size(void)
+{
+	unsigned long size;
+
+	for (size = RALINK_SOC_MEM_SIZE_MIN; size < RALINK_SOC_MEM_SIZE_MAX;
+	     size <<= 1 ) {
+		if (!memcmp(detect_mem_size,
+			    detect_mem_size + size, 1024))
+			break;
+	}
+
+	add_memory_region(RALINK_SOC_SDRAM_BASE, size, BOOT_MEM_RAM);
+}
 
 void __init plat_mem_setup(void)
 {
 	set_io_port_base(KSEG1);
 
+	detect_mem_size();
 	ramips_soc_setup();
 }