diff options
Diffstat (limited to 'arch/arm/include/asm/cputype.h')
| -rw-r--r-- | arch/arm/include/asm/cputype.h | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/arch/arm/include/asm/cputype.h b/arch/arm/include/asm/cputype.h index f39939bd44..c3fc057650 100644 --- a/arch/arm/include/asm/cputype.h +++ b/arch/arm/include/asm/cputype.h @@ -1,9 +1,28 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + #ifndef __ASM_ARM_CPUTYPE_H #define __ASM_ARM_CPUTYPE_H #include <linux/stringify.h> #include <linux/kernel.h> +#ifdef CONFIG_CPU_64v8 + +#define CPUID_ID midr_el1 +#define CPUID_CACHETYPE ctr_el0 +#define CPUID_MPIDR mpidr_el1 + +#define read_cpuid(reg) \ + ({ \ + unsigned int __val; \ + asm("mrs %0, " __stringify(reg) \ + : "=r" (__val) \ + : \ + : "cc"); \ + __val; \ + }) +#else + #define CPUID_ID 0 #define CPUID_CACHETYPE 1 #define CPUID_TCM 2 @@ -25,8 +44,6 @@ #define CPUID_EXT_ISAR4 "c2, 4" #define CPUID_EXT_ISAR5 "c2, 5" -extern unsigned int processor_id; - #define read_cpuid(reg) \ ({ \ unsigned int __val; \ @@ -45,6 +62,9 @@ extern unsigned int processor_id; : "cc"); \ __val; \ }) +#endif + +extern unsigned int processor_id; /* * The CPU ID never changes at run time, so we might as well tell the |