| /* |
| * Copyright (C) 2012 ARM Ltd. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| #ifndef __ASM_CPUTYPE_H |
| #define __ASM_CPUTYPE_H |
| |
| #define ID_MIDR_EL1 "midr_el1" |
| #define ID_CTR_EL0 "ctr_el0" |
| |
| #define ID_AA64PFR0_EL1 "id_aa64pfr0_el1" |
| #define ID_AA64DFR0_EL1 "id_aa64dfr0_el1" |
| #define ID_AA64AFR0_EL1 "id_aa64afr0_el1" |
| #define ID_AA64ISAR0_EL1 "id_aa64isar0_el1" |
| #define ID_AA64MMFR0_EL1 "id_aa64mmfr0_el1" |
| |
| #define read_cpuid(reg) ({ \ |
| u64 __val; \ |
| asm("mrs %0, " reg : "=r" (__val)); \ |
| __val; \ |
| }) |
| |
| /* |
| * 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 |
| * rather than directly reading processor_id or read_cpuid() directly. |
| */ |
| static inline u32 __attribute_const__ read_cpuid_id(void) |
| { |
| return read_cpuid(ID_MIDR_EL1); |
| } |
| |
| static inline u32 __attribute_const__ read_cpuid_cachetype(void) |
| { |
| return read_cpuid(ID_CTR_EL0); |
| } |
| |
| #endif |