From 722138340b9f08d081255ba50928831a972c2e6f Mon Sep 17 00:00:00 2001 From: Jayachandran C Date: Mon, 10 Jun 2013 06:41:08 +0000 Subject: [PATCH] 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 Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5431/ Signed-off-by: Ralf Baechle --- arch/mips/netlogic/xlp/setup.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/arch/mips/netlogic/xlp/setup.c b/arch/mips/netlogic/xlp/setup.c index 8f6992432f34..7b638f7be491 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)