projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| df857416 MR |
1 | /* |
| 2 | * Record and handle CPU attributes. | |
| 3 | * | |
| 4 | * Copyright (C) 2014 ARM Ltd. | |
| 5 | * This program is free software; you can redistribute it and/or modify | |
| 6 | * it under the terms of the GNU General Public License version 2 as | |
| 7 | * published by the Free Software Foundation. | |
| 8 | * | |
| 9 | * This program is distributed in the hope that it will be useful, | |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 12 | * GNU General Public License for more details. | |
| 13 | * | |
| 14 | * You should have received a copy of the GNU General Public License | |
| 15 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 16 | */ | |
| 17 | #include <asm/arch_timer.h> | |
| 18 | #include <asm/cachetype.h> | |
| 19 | #include <asm/cpu.h> | |
| 20 | #include <asm/cputype.h> | |
| 21 | ||
| 22 | #include <linux/init.h> | |
| 23 | #include <linux/smp.h> | |
| 24 | ||
| 25 | /* | |
| 26 | * In case the boot CPU is hotpluggable, we record its initial state and | |
| 27 | * current state separately. Certain system registers may contain different | |
| 28 | * values depending on configuration at or after reset. | |
| 29 | */ | |
| 30 | DEFINE_PER_CPU(struct cpuinfo_arm64, cpu_data); | |
| 31 | static struct cpuinfo_arm64 boot_cpu_data; | |
| 32 | ||
| 33 | static void __cpuinfo_store_cpu(struct cpuinfo_arm64 *info) | |
| 34 | { | |
| 35 | info->reg_cntfrq = arch_timer_get_cntfrq(); | |
| 36 | info->reg_ctr = read_cpuid_cachetype(); | |
| 37 | info->reg_dczid = read_cpuid(DCZID_EL0); | |
| 38 | info->reg_midr = read_cpuid_id(); | |
| 39 | ||
| 40 | info->reg_id_aa64isar0 = read_cpuid(ID_AA64ISAR0_EL1); | |
| 41 | info->reg_id_aa64isar1 = read_cpuid(ID_AA64ISAR1_EL1); | |
| 42 | info->reg_id_aa64mmfr0 = read_cpuid(ID_AA64MMFR0_EL1); | |
| 43 | info->reg_id_aa64mmfr1 = read_cpuid(ID_AA64MMFR1_EL1); | |
| 44 | info->reg_id_aa64pfr0 = read_cpuid(ID_AA64PFR0_EL1); | |
| 45 | info->reg_id_aa64pfr1 = read_cpuid(ID_AA64PFR1_EL1); | |
| 46 | ||
| 47 | info->reg_id_isar0 = read_cpuid(ID_ISAR0_EL1); | |
| 48 | info->reg_id_isar1 = read_cpuid(ID_ISAR1_EL1); | |
| 49 | info->reg_id_isar2 = read_cpuid(ID_ISAR2_EL1); | |
| 50 | info->reg_id_isar3 = read_cpuid(ID_ISAR3_EL1); | |
| 51 | info->reg_id_isar4 = read_cpuid(ID_ISAR4_EL1); | |
| 52 | info->reg_id_isar5 = read_cpuid(ID_ISAR5_EL1); | |
| 53 | info->reg_id_mmfr0 = read_cpuid(ID_MMFR0_EL1); | |
| 54 | info->reg_id_mmfr1 = read_cpuid(ID_MMFR1_EL1); | |
| 55 | info->reg_id_mmfr2 = read_cpuid(ID_MMFR2_EL1); | |
| 56 | info->reg_id_mmfr3 = read_cpuid(ID_MMFR3_EL1); | |
| 57 | info->reg_id_pfr0 = read_cpuid(ID_PFR0_EL1); | |
| 58 | info->reg_id_pfr1 = read_cpuid(ID_PFR1_EL1); | |
| 59 | } | |
| 60 | ||
| 61 | void cpuinfo_store_cpu(void) | |
| 62 | { | |
| 63 | struct cpuinfo_arm64 *info = this_cpu_ptr(&cpu_data); | |
| 64 | __cpuinfo_store_cpu(info); | |
| 65 | } | |
| 66 | ||
| 67 | void __init cpuinfo_store_boot_cpu(void) | |
| 68 | { | |
| 69 | struct cpuinfo_arm64 *info = &per_cpu(cpu_data, 0); | |
| 70 | __cpuinfo_store_cpu(info); | |
| 71 | ||
| 72 | boot_cpu_data = *info; | |
| 73 | } |