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authorJayachandran C <jchandra@broadcom.com>2013-06-10 06:41:08 +0000
committerRalf Baechle <ralf@linux-mips.org>2013-06-13 17:46:43 +0200
commit722138340b9f08d081255ba50928831a972c2e6f (patch)
treeafb892f1f31994ae0b31cac66d6a34038ed45c70
parent4033d38ceb9d84ed66b925c1740c1a88f8a4a8f9 (diff)
downloadop-kernel-dev-722138340b9f08d081255ba50928831a972c2e6f.zip
op-kernel-dev-722138340b9f08d081255ba50928831a972c2e6f.tar.gz
MIPS: Netlogic: Fixup memory regions for prefetch
Fix a cache error found in stress test, caused by the prefetch instruction going beyond valid memory when acessing the last page of a region. Add the pref_backup logic similar to XLR in XLP too. Signed-off-by: Jayachandran C <jchandra@broadcom.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5431/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
-rw-r--r--arch/mips/netlogic/xlp/setup.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/mips/netlogic/xlp/setup.c b/arch/mips/netlogic/xlp/setup.c
index 8f69924..7b638f7 100644
--- a/arch/mips/netlogic/xlp/setup.c
+++ b/arch/mips/netlogic/xlp/setup.c
@@ -61,6 +61,18 @@ static void nlm_linux_exit(void)
cpu_wait();
}
+static void nlm_fixup_mem(void)
+{
+ const int pref_backup = 512;
+ int i;
+
+ for (i = 0; i < boot_mem_map.nr_map; i++) {
+ if (boot_mem_map.map[i].type != BOOT_MEM_RAM)
+ continue;
+ boot_mem_map.map[i].size -= pref_backup;
+ }
+}
+
void __init plat_mem_setup(void)
{
panic_timeout = 5;
@@ -70,6 +82,7 @@ void __init plat_mem_setup(void)
/* memory and bootargs from DT */
early_init_devtree(initial_boot_params);
+ nlm_fixup_mem();
}
const char *get_system_type(void)
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