MIPS: BCM47xx: Fix 128MB RAM support

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / mips / bcm47xx / prom.c

diff --git a/arch/mips/bcm47xx/prom.c b/arch/mips/bcm47xx/prom.c
index c51405e5792117d868b99dc2fe21c30c8f06061d..29d3cbf9555feae7f96e4faf6b076f797d5b14c4 100644 (file)
--- a/arch/mips/bcm47xx/prom.c
+++ b/arch/mips/bcm47xx/prom.c
@@ -141,6 +141,14 @@ 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 (mem == 0x8000000)
+               mem -= 0x1000;
+
        add_memory_region(0, mem, BOOT_MEM_RAM);
 }