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authorHauke Mehrtens <hauke@hauke-m.de>2010-02-20 18:51:20 (GMT)
committerRalf Baechle <ralf@linux-mips.org>2010-02-22 20:42:12 (GMT)
commit84a6fcb368a080620d12fc4d79e07902dbee7335 (patch)
treefc842c252eed342e5457b407dc78627ffaa7eb71
parent52ab320ac560af3333191a473e56615fb48fff95 (diff)
downloadlinux-fsl-qoriq-84a6fcb368a080620d12fc4d79e07902dbee7335.tar.xz
MIPS: BCM47xx: Fix 128MB RAM support
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. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> Cc: linux-mips@linux-mips.org Patchwork: http://patchwork.linux-mips.org/patch/981/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
-rw-r--r--arch/mips/bcm47xx/prom.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/mips/bcm47xx/prom.c b/arch/mips/bcm47xx/prom.c
index c51405e..29d3cbf 100644
--- 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);
}