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[libcpu] arm64: implement cpuid get by assembly (#9052)

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Shell 2024-06-11 17:21:47 +08:00 committed by GitHub
parent 47ee23510c
commit a12736e4c8
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GPG Key ID: B5690EEEBB952194
2 changed files with 12 additions and 21 deletions
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15
libcpu/aarch64/common/context_gcc.S
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@ -62,12 +62,21 @@ rt_hw_cpu_id_set:
/* /*
int rt_hw_cpu_id(void) int rt_hw_cpu_id(void)
*/ */
.weak rt_hw_cpu_id
.type rt_hw_cpu_id, @function .type rt_hw_cpu_id, @function
rt_hw_cpu_id: rt_hw_cpu_id:
#ifdef ARCH_USING_GENERIC_CPUID
.globl rt_hw_cpu_id
#else /* !ARCH_USING_GENERIC_CPUID */
.weak rt_hw_cpu_id
#endif /* ARCH_USING_GENERIC_CPUID */
#if RT_CPUS_NR > 1 #if RT_CPUS_NR > 1
mrs x0, tpidr_el1 #ifdef ARCH_USING_GENERIC_CPUID
#else mrs x0, tpidrro_el0
#else /* !ARCH_USING_GENERIC_CPUID */
mrs x0, tpidr_el1
#endif /* ARCH_USING_GENERIC_CPUID */
#else /* RT_CPUS_NR == 1 */
mov x0, xzr mov x0, xzr
#endif #endif
ret ret

18
libcpu/aarch64/common/cpu.c
View File

@ -231,24 +231,6 @@ int rt_hw_cpu_boot_secondary(int num_cpus, rt_uint64_t *cpu_hw_ids, struct cpu_o
#endif /*RT_USING_SMP*/ #endif /*RT_USING_SMP*/
/**
* Generic hw-cpu-id
*/
#ifdef ARCH_USING_GENERIC_CPUID
int rt_hw_cpu_id(void)
{
#if RT_CPUS_NR > 1
long cpuid;
__asm__ volatile("mrs %0, tpidrro_el0":"=r"(cpuid));
return cpuid;
#else
return 0;
#endif /* RT_CPUS_NR > 1 */
}
#endif /* ARCH_USING_GENERIC_CPUID */
/** /**
* @addtogroup ARM CPU * @addtogroup ARM CPU
*/ */