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authorTaras Kondratiuk <taras.kondratiuk@linaro.org>2014-01-10 01:27:08 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-01-25 08:49:30 -0800
commitf440ce0a108cd7e800894b89dcdf053aff09daad (patch)
treeba9e7d58b46296b80aed9747e18c34b53940bd85
parent94e61221d5c23789da5925c7f6dafdcf3491354d (diff)
ARM: 7938/1: OMAP4/highbank: Flush L2 cache before disabling
commit b25f3e1c358434bf850220e04f28eebfc45eb634 upstream. Kexec disables outer cache before jumping to reboot code, but it doesn't flush it explicitly. Flush is done implicitly inside of l2x0_disable(). But some SoC's override default .disable handler and don't flush cache. This may lead to a corrupted memory during Kexec reboot on these platforms. This patch adds cache flush inside of OMAP4 and Highbank outer_cache.disable() handlers to make it consistent with default l2x0_disable(). Acked-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Taras Kondratiuk <taras.kondratiuk@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Cc: Wang Nan <wangnan0@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--arch/arm/mach-highbank/highbank.c1
-rw-r--r--arch/arm/mach-omap2/omap4-common.c1
2 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/mach-highbank/highbank.c b/arch/arm/mach-highbank/highbank.c
index 8e44973b0139..2f176a495c32 100644
--- a/arch/arm/mach-highbank/highbank.c
+++ b/arch/arm/mach-highbank/highbank.c
@@ -66,6 +66,7 @@ void highbank_set_cpu_jump(int cpu, void *jump_addr)
static void highbank_l2x0_disable(void)
{
+ outer_flush_all();
/* Disable PL310 L2 Cache controller */
highbank_smc1(0x102, 0x0);
}
diff --git a/arch/arm/mach-omap2/omap4-common.c b/arch/arm/mach-omap2/omap4-common.c
index 57911430324e..3f44b162fcab 100644
--- a/arch/arm/mach-omap2/omap4-common.c
+++ b/arch/arm/mach-omap2/omap4-common.c
@@ -163,6 +163,7 @@ void __iomem *omap4_get_l2cache_base(void)
static void omap4_l2x0_disable(void)
{
+ outer_flush_all();
/* Disable PL310 L2 Cache controller */
omap_smc1(0x102, 0x0);
}