diff options
| author | Tony Lindgren <tony@atomide.com> | 2010-10-05 17:40:13 +0200 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-10-08 11:02:24 +0200 |
| commit | 7511db9d25080d53e5427bf4b8849278c07019bc (patch) | |
| tree | ab05e133b3b7a277c28dd01cf10f8d768674c28e /arch/arm/include | |
| parent | ARM: 6405/1: Handle __flush_icache_all for CONFIG_SMP_ON_UP (diff) | |
| download | linux-7511db9d25080d53e5427bf4b8849278c07019bc.tar.xz linux-7511db9d25080d53e5427bf4b8849278c07019bc.zip | |
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.h | 28 |
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 7de5aa56c18b..7f4e6633f753 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 |