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authorMarc Zyngier <Marc.Zyngier@arm.com>2013-02-27 18:05:59 +0000
committerCatalin Marinas <catalin.marinas@arm.com>2013-03-20 16:46:42 +0000
commitd9c1951f400942bbdb41e75a73d151e4a9d5469e (patch)
treee2f13c2d6a5c423ad77713fadb3b7a0898e62853 /arch/arm64/include
parent792072066d30372772137be9ee2f4d72d77329f9 (diff)
downloadlinaro-lsk-d9c1951f400942bbdb41e75a73d151e4a9d5469e.tar.gz
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/include')
-rw-r--r--arch/arm64/include/asm/cputype.h22
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/cputype.h b/arch/arm64/include/asm/cputype.h
index ef54125e6c1..7a317029e73 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);