brcm47xx: move patches already in the mainline kernel to the front

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@34987 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 33 insertions, 0 deletions

diff --git a/target/linux/brcm47xx/patches-3.6/010-MIPS-BCM47XX-ignore-last-memory-page.patch b/target/linux/brcm47xx/patches-3.6/010-MIPS-BCM47XX-ignore-last-memory-page.patch
new file mode 100644
index 000000000..a2a7b9f5f
--- /dev/null
+++ b/target/linux/brcm47xx/patches-3.6/010-MIPS-BCM47XX-ignore-last-memory-page.patch
@@ -0,0 +1,33 @@
+--- a/arch/mips/bcm47xx/prom.c
++++ b/arch/mips/bcm47xx/prom.c
+@@ -27,6 +27,7 @@
+ #include <linux/types.h>
+ #include <linux/kernel.h>
+ #include <linux/spinlock.h>
++#include <linux/smp.h>
+ #include <asm/bootinfo.h>
+ #include <asm/fw/cfe/cfe_api.h>
+ #include <asm/fw/cfe/cfe_error.h>
+@@ -127,6 +128,7 @@ static __init void prom_init_mem(void)
+ {
+ 	unsigned long mem;
+ 	unsigned long max;
++	struct cpuinfo_mips *c = &current_cpu_data;
+ 
+ 	/* Figure out memory size by finding aliases.
+ 	 *
+@@ -155,6 +157,14 @@ static __init void prom_init_mem(void)
+ 			break;
+ 	}
+ 
++	/* Ignoring the last page when ddr size is 128M. Cached
++	 * accesses to last page is causing the processor to prefetch
++	 * using address above 128M stepping out of the ddr address
++	 * space.
++	 */
++	if (c->cputype == CPU_74K && (mem == (128  << 20)))
++		mem -= 0x1000;
++
+ 	add_memory_region(0, mem, BOOT_MEM_RAM);
+ }
+