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/*
* 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_MPIDR_EL1 "mpidr_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 INVALID_HWID ULONG_MAX
#define MPIDR_HWID_BITMASK 0xff00ffffff
#define read_cpuid(reg) ({ \
u64 __val; \
asm("mrs %0, " reg : "=r" (__val)); \
__val; \
})
#define ARM_CPU_IMP_ARM 0x41
#define ARM_CPU_PART_AEM_V8 0xD0F0
#define ARM_CPU_PART_FOUNDATION 0xD000
#define ARM_CPU_PART_CORTEX_A57 0xD070
#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(ID_MIDR_EL1);
}
static inline u64 __attribute_const__ read_cpuid_mpidr(void)
{
return read_cpuid(ID_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(ID_CTR_EL0);
}
#endif /* __ASSEMBLY__ */
#endif
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