ramips: allow to use custom code for memory size detection

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@33570 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/common.h b/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/common.h
index 111dd06..bb6e12b 100644 (file)
--- a/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/common.h
+++ b/target/linux/ramips/files/arch/mips/include/asm/mach-ralink/common.h
@@ -14,6 +14,7 @@ extern unsigned char ramips_sys_type[RAMIPS_SYS_TYPE_LEN];
 extern unsigned long ramips_mem_base;
 extern unsigned long ramips_mem_size_min;
 extern unsigned long ramips_mem_size_max;
+extern unsigned long (*ramips_get_mem_size)(void);
 
 void ramips_intc_irq_init(unsigned intc_base, unsigned irq, unsigned irq_base);
 u32 ramips_intc_get_status(void);

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 0d6b8d8..1af855e 100644 (file)
--- a/target/linux/ramips/files/arch/mips/ralink/common/setup.c
+++ b/target/linux/ramips/files/arch/mips/ralink/common/setup.c
@@ -21,6 +21,7 @@
 #include <asm/mach-ralink/machine.h>
 
 unsigned char ramips_sys_type[RAMIPS_SYS_TYPE_LEN];
+unsigned long (*ramips_get_mem_size)(void);
 
 const char *get_system_type(void)
 {
@@ -30,13 +31,18 @@ const char *get_system_type(void)
 static void __init detect_mem_size(void)
 {
        unsigned long size;
-       void *base;
 
-       base = (void *) KSEG1ADDR(detect_mem_size);
-       for (size = ramips_mem_size_min; size < ramips_mem_size_max;
-            size <<= 1 ) {
-               if (!memcmp(base, base + size, 1024))
-                       break;
+       if (ramips_get_mem_size) {
+               size = ramips_get_mem_size();
+       } else {
+               void *base;
+
+               base = (void *) KSEG1ADDR(detect_mem_size);
+               for (size = ramips_mem_size_min; size < ramips_mem_size_max;
+                    size <<= 1 ) {
+                       if (!memcmp(base, base + size, 1024))
+                               break;
+               }
        }
 
        add_memory_region(ramips_mem_base, size, BOOT_MEM_RAM);