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authorCatalin Marinas <catalin.marinas@arm.com>2010-03-24 16:47:53 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2010-03-25 22:13:49 +0100
commit319f551a0a167b49b5bbb4a9ff4802046a572bc5 (patch)
treeb10f922c96e8f0a6ead8557677badeaf27bea630 /arch/arm
parentARM: 5993/1: ARM: Move the outer_cache definitions into a separate file (1/4) (diff)
downloadlinux-319f551a0a167b49b5bbb4a9ff4802046a572bc5.tar.xz
linux-319f551a0a167b49b5bbb4a9ff4802046a572bc5.zip
ARM: 5994/1: ARM: Add outer_cache_fns.sync function pointer (2/4)
This patch introduces the outer_cache_fns.sync function pointer together with the OUTER_CACHE_SYNC config option that can be used to drain the write buffer of the outer cache. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/include/asm/outercache.h14
-rw-r--r--arch/arm/mm/Kconfig6
2 files changed, 20 insertions, 0 deletions
diff --git a/arch/arm/include/asm/outercache.h b/arch/arm/include/asm/outercache.h
index c8571cbb5574..25f76bae57ab 100644
--- a/arch/arm/include/asm/outercache.h
+++ b/arch/arm/include/asm/outercache.h
@@ -25,6 +25,9 @@ struct outer_cache_fns {
void (*inv_range)(unsigned long, unsigned long);
void (*clean_range)(unsigned long, unsigned long);
void (*flush_range)(unsigned long, unsigned long);
+#ifdef CONFIG_OUTER_CACHE_SYNC
+ void (*sync)(void);
+#endif
};
#ifdef CONFIG_OUTER_CACHE
@@ -58,4 +61,15 @@ static inline void outer_flush_range(unsigned long start, unsigned long end)
#endif
+#ifdef CONFIG_OUTER_CACHE_SYNC
+static inline void outer_sync(void)
+{
+ if (outer_cache.sync)
+ outer_cache.sync();
+}
+#else
+static inline void outer_sync(void)
+{ }
+#endif
+
#endif /* __ASM_OUTERCACHE_H */
diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index c4ed9f93f646..88a24de55aaf 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -736,6 +736,12 @@ config NEEDS_SYSCALL_FOR_CMPXCHG
config OUTER_CACHE
bool
+config OUTER_CACHE_SYNC
+ bool
+ help
+ The outer cache has a outer_cache_fns.sync function pointer
+ that can be used to drain the write buffer of the outer cache.
+
config CACHE_FEROCEON_L2
bool "Enable the Feroceon L2 cache controller"
depends on ARCH_KIRKWOOD || ARCH_MV78XX0