1 files changed, 10 insertions, 0 deletions

diff --git a/arch/mips/bcm47xx/prom.c b/arch/mips/bcm47xx/prom.c
index f6e9063cc4c2..22258a4c652b 100644
--- 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);
 }