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authorTony Lindgren <tony@atomide.com>2010-10-05 16:40:13 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2010-10-08 10:02:24 +0100
commit7511db9d25080d53e5427bf4b8849278c07019bc (patch)
treeab05e133b3b7a277c28dd01cf10f8d768674c28e /arch/arm/include
parent81d11955bf0b5ae25e3adbec930cd84840385dae (diff)
ARM: 6429/1: Check for is_smp for tlb_ops and cache_ops broadcast
Broadcast should not be needed when running SMP kernel on UP systems. Also, this fixes an undefined instruction for SMP_ON_UP on earlier ARM cores without the extended CPUID_EXT_MMFR3 register. Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/include')
-rw-r--r--arch/arm/include/asm/smp_plat.h28
1 files changed, 17 insertions, 11 deletions
diff --git a/arch/arm/include/asm/smp_plat.h b/arch/arm/include/asm/smp_plat.h
index 7de5aa56c18..7f4e6633f75 100644
--- a/arch/arm/include/asm/smp_plat.h
+++ b/arch/arm/include/asm/smp_plat.h
@@ -7,17 +7,6 @@
#include <asm/cputype.h>
-/* all SMP configurations have the extended CPUID registers */
-static inline int tlb_ops_need_broadcast(void)
-{
- return ((read_cpuid_ext(CPUID_EXT_MMFR3) >> 12) & 0xf) < 2;
-}
-
-static inline int cache_ops_need_broadcast(void)
-{
- return ((read_cpuid_ext(CPUID_EXT_MMFR3) >> 12) & 0xf) < 1;
-}
-
/*
* Return true if we are running on a SMP platform
*/
@@ -33,4 +22,21 @@ static inline bool is_smp(void)
#endif
}
+/* all SMP configurations have the extended CPUID registers */
+static inline int tlb_ops_need_broadcast(void)
+{
+ if (!is_smp())
+ return 0;
+
+ return ((read_cpuid_ext(CPUID_EXT_MMFR3) >> 12) & 0xf) < 2;
+}
+
+static inline int cache_ops_need_broadcast(void)
+{
+ if (!is_smp())
+ return 0;
+
+ return ((read_cpuid_ext(CPUID_EXT_MMFR3) >> 12) & 0xf) < 1;
+}
+
#endif