50 lines
1.5 KiB
C
50 lines
1.5 KiB
C
/*
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* Copyright (C) 2012 ARM Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __ASM_CPUTYPE_H
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#define __ASM_CPUTYPE_H
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#define ID_MIDR_EL1 "midr_el1"
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#define ID_CTR_EL0 "ctr_el0"
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#define ID_AA64PFR0_EL1 "id_aa64pfr0_el1"
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#define ID_AA64DFR0_EL1 "id_aa64dfr0_el1"
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#define ID_AA64AFR0_EL1 "id_aa64afr0_el1"
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#define ID_AA64ISAR0_EL1 "id_aa64isar0_el1"
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#define ID_AA64MMFR0_EL1 "id_aa64mmfr0_el1"
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#define read_cpuid(reg) ({ \
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u64 __val; \
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asm("mrs %0, " reg : "=r" (__val)); \
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__val; \
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})
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/*
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* The CPU ID never changes at run time, so we might as well tell the
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* compiler that it's constant. Use this function to read the CPU ID
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* rather than directly reading processor_id or read_cpuid() directly.
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*/
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static inline u32 __attribute_const__ read_cpuid_id(void)
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{
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return read_cpuid(ID_MIDR_EL1);
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}
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static inline u32 __attribute_const__ read_cpuid_cachetype(void)
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{
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return read_cpuid(ID_CTR_EL0);
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}
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#endif
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