diff options
| author | Marc Zyngier <Marc.Zyngier@arm.com> | 2013-02-27 18:05:59 +0000 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2013-03-20 16:46:42 +0000 |
| commit | d9c1951f400942bbdb41e75a73d151e4a9d5469e (patch) | |
| tree | e2f13c2d6a5c423ad77713fadb3b7a0898e62853 /arch/arm64 | |
| parent | 792072066d30372772137be9ee2f4d72d77329f9 (diff) | |
| download | linux-d9c1951f400942bbdb41e75a73d151e4a9d5469e.tar.gz linux-d9c1951f400942bbdb41e75a73d151e4a9d5469e.tar.bz2 linux-d9c1951f400942bbdb41e75a73d151e4a9d5469e.zip | |
arm64: add read_cpuid_{implementor,part_number,mpidr}
In order to preserve some kind of source compatibility between
arm and arm64, introduce read_cpuid_{implementor,part_number,mpidr}
which are used on KVM to find out which CPU we're running on.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64')
| -rw-r--r-- | arch/arm64/include/asm/cputype.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/cputype.h b/arch/arm64/include/asm/cputype.h index ef54125e6c1e..7a317029e735 100644 --- a/arch/arm64/include/asm/cputype.h +++ b/arch/arm64/include/asm/cputype.h @@ -17,6 +17,7 @@ #define __ASM_CPUTYPE_H #define ID_MIDR_EL1 "midr_el1" +#define ID_MPIDR_EL1 "mpidr_el1" #define ID_CTR_EL0 "ctr_el0" #define ID_AA64PFR0_EL1 "id_aa64pfr0_el1" @@ -31,6 +32,12 @@ __val; \ }) +#define ARM_CPU_IMP_ARM 0x41 + +#define ARM_CPU_PART_AEM_V8 0xD0F0 +#define ARM_CPU_PART_FOUNDATION 0xD000 +#define ARM_CPU_PART_CORTEX_A57 0xD070 + /* * The CPU ID never changes at run time, so we might as well tell the * compiler that it's constant. Use this function to read the CPU ID @@ -41,6 +48,21 @@ static inline u32 __attribute_const__ read_cpuid_id(void) return read_cpuid(ID_MIDR_EL1); } +static inline u64 __attribute_const__ read_cpuid_mpidr(void) +{ + return read_cpuid(ID_MPIDR_EL1); +} + +static inline unsigned int __attribute_const__ read_cpuid_implementor(void) +{ + return (read_cpuid_id() & 0xFF000000) >> 24; +} + +static inline unsigned int __attribute_const__ read_cpuid_part_number(void) +{ + return (read_cpuid_id() & 0xFFF0); +} + static inline u32 __attribute_const__ read_cpuid_cachetype(void) { return read_cpuid(ID_CTR_EL0); |