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| author |   Taras Kondratiuk <taras.kondratiuk@linaro.org> | 2014-01-10 01:27:08 +0100 |
|---|---|---|
| committer |   Russell King <rmk+kernel@arm.linux.org.uk> | 2014-01-12 14:15:27 +0000 |
| commit | b25f3e1c358434bf850220e04f28eebfc45eb634 (patch) | |
| tree | 5b72a6f960fad442b71df141d415eaa8a592c4e8 /arch/arm | |
| parent | ARM: 7939/1: traps: fix opcode endianness when read from user memory (diff) | |
| download | linux-dev-b25f3e1c358434bf850220e04f28eebfc45eb634.tar.xz linux-dev-b25f3e1c358434bf850220e04f28eebfc45eb634.zip | |
ARM: 7938/1: OMAP4/highbank: Flush L2 cache before disabling
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>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-highbank/highbank.c | 1 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/omap4-common.c | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/mach-highbank/highbank.c b/arch/arm/mach-highbank/highbank.c index b3d7e5634b83..ae171506cb06 100644 --- a/arch/arm/mach-highbank/highbank.c +++ b/arch/arm/mach-highbank/highbank.c @@ -50,6 +50,7 @@ static void __init highbank_scu_map_io(void) 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); } |