diff options
| author | Chao Xie Linux <xiechao.mail@gmail.com> | 2014-04-02 02:47:09 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2014-04-08 17:55:27 +0100 |
| commit | fdb487f5c961b94486a78fa61fa28b8eff1954ab (patch) | |
| tree | d410f30c369db2898f28cca587e789ddba45f385 | |
| parent | 779dd9590b00bd91b7811c24f0df34a9d91bfa0f (diff) | |
ARM: 8015/1: Add cpu_is_pj4 to distinguish PJ4 because it has some differences with V7
The patch add cpu_is_pj4 at arch/arm/include/asm/cputype.h
PJ4 has some differences with V7, for example the coprocessor.
To disinguish this kind of situation. cpu_is_pj4 is needed.
Signed-off-by: Chao Xie <chao.xie@marvell.com>
Reviewed-by: Kevin Hilman <khilman@linaro.org>
Tested-by: Kevin Hilman <khilman@linaro.org>
Tested-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Matt Porter <mporter@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| -rw-r--r-- | arch/arm/include/asm/cputype.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/arm/include/asm/cputype.h b/arch/arm/include/asm/cputype.h index 42f0889f0584..c651e3b26ec7 100644 --- a/arch/arm/include/asm/cputype.h +++ b/arch/arm/include/asm/cputype.h @@ -221,4 +221,23 @@ static inline int cpu_is_xsc3(void) #define cpu_is_xscale() 1 #endif +/* + * Marvell's PJ4 core is based on V7 version. It has some modification + * for coprocessor setting. For this reason, we need a way to distinguish + * it. + */ +#ifndef CONFIG_CPU_PJ4 +#define cpu_is_pj4() 0 +#else +static inline int cpu_is_pj4(void) +{ + unsigned int id; + + id = read_cpuid_id(); + if ((id & 0xfffffff0) == 0x562f5840) + return 1; + + return 0; +} +#endif #endif |