| /* |
| * 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 INVALID_HWID ULONG_MAX |
| |
| #define MPIDR_HWID_BITMASK 0xff00ffffff |
| |
| #define MPIDR_LEVEL_BITS_SHIFT 3 |
| #define MPIDR_LEVEL_BITS (1 << MPIDR_LEVEL_BITS_SHIFT) |
| #define MPIDR_LEVEL_MASK ((1 << MPIDR_LEVEL_BITS) - 1) |
| |
| #define MPIDR_LEVEL_SHIFT(level) \ |
| (((1 << level) >> 1) << MPIDR_LEVEL_BITS_SHIFT) |
| |
| #define MPIDR_AFFINITY_LEVEL(mpidr, level) \ |
| ((mpidr >> MPIDR_LEVEL_SHIFT(level)) & MPIDR_LEVEL_MASK) |
| |
| #define read_cpuid(reg) ({ \ |
| u64 __val; \ |
| asm("mrs %0, " #reg : "=r" (__val)); \ |
| __val; \ |
| }) |
| |
| #define ARM_CPU_IMP_ARM 0x41 |
| #define ARM_CPU_IMP_APM 0x50 |
| |
| #define ARM_CPU_PART_AEM_V8 0xD0F0 |
| #define ARM_CPU_PART_FOUNDATION 0xD000 |
| #define ARM_CPU_PART_CORTEX_A57 0xD070 |
| |
| #define APM_CPU_PART_POTENZA 0x0000 |
| |
| #ifndef __ASSEMBLY__ |
| |
| /* |
| * 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(MIDR_EL1); |
| } |
| |
| static inline u64 __attribute_const__ read_cpuid_mpidr(void) |
| { |
| return read_cpuid(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(CTR_EL0); |
| } |
| |
| #endif /* __ASSEMBLY__ */ |
| |
| #endif |