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Diffstat (limited to 'src/arch/arm64/cpu.c')
| -rw-r--r-- | src/arch/arm64/cpu.c | 224 |
1 files changed, 0 insertions, 224 deletions
diff --git a/src/arch/arm64/cpu.c b/src/arch/arm64/cpu.c deleted file mode 100644 index 1501181364..0000000000 --- a/src/arch/arm64/cpu.c +++ /dev/null @@ -1,224 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright 2013 Google Inc. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; version 2 of the License. - * - * 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. - */ - -#include <stdint.h> -#include <stdlib.h> -#include <arch/lib_helpers.h> -#include <cpu/cpu.h> -#include <console/console.h> -#include <smp/node.h> -#include "cpu-internal.h" - -struct cpu_info cpu_infos[CONFIG_MAX_CPUS]; -struct cpu_info *bsp_cpu_info; - -struct cpu_info *cpu_info(void) -{ - return cpu_info_for_cpu(smp_processor_id()); -} - -size_t cpus_online(void) -{ - int i; - size_t num = 0; - - for (i = 0; i < ARRAY_SIZE(cpu_infos); i++) { - if (cpu_online(cpu_info_for_cpu(i))) - num++; - } - - return num; -} - -static inline int action_queue_empty(struct cpu_action_queue *q) -{ - return load_acquire_exclusive(&q->todo) == NULL; -} - -static inline int action_completed(struct cpu_action_queue *q, - struct cpu_action *action) -{ - return load_acquire(&q->completed) == action; -} - -static inline void wait_for_action_queue_slot(struct cpu_action_queue *q) -{ - while (!action_queue_empty(q)) - wfe(); -} - -static void wait_for_action_complete(struct cpu_action_queue *q, - struct cpu_action *a) -{ - while (!action_completed(q, a)) - wfe(); -} - -static struct cpu_action *wait_for_action(struct cpu_action_queue *q, - struct cpu_action *local) -{ - struct cpu_action *action; - - while (action_queue_empty(q)) - wfe(); - - /* - * Keep original address, but use a local copy for async processing. - */ - do { - action = load_acquire_exclusive(&q->todo); - *local = *action; - } while (!store_release_exclusive(&q->todo, NULL)); - - return action; -} - -static void queue_action(struct cpu_action_queue *q, struct cpu_action *action) -{ - do { - wait_for_action_queue_slot(q); - if (load_acquire_exclusive(&q->todo) != NULL) - continue; - } while (!store_release_exclusive(&q->todo, action)); -} - -static void action_queue_complete(struct cpu_action_queue *q, - struct cpu_action *action) -{ - /* Mark completion and send events to waiters. */ - store_release(&q->completed, action); - sev(); -} - -static void action_run(struct cpu_action *action) -{ - action->run(action->arg); -} - -static void action_run_on_cpu(struct cpu_info *ci, struct cpu_action *action, - int sync) -{ - struct cpu_action_queue *q = &ci->action_queue; - - /* Don't run actions on non-online cpus. */ - if (!cpu_online(ci)) - return; - - if (ci->id == smp_processor_id()) { - action->run(action->arg); - return; - } - - queue_action(q, action); - /* Wait for CPU to pick it up. Empty slot means it was picked up. */ - wait_for_action_queue_slot(q); - /* Wait for completion if requested. */ - if (sync) - wait_for_action_complete(q, action); -} - -static int __arch_run_on_cpu(unsigned int cpu, struct cpu_action *action, - int sync) -{ - struct cpu_info *ci; - - if (cpu >= CONFIG_MAX_CPUS) - return -1; - - ci = cpu_info_for_cpu(cpu); - - action_run_on_cpu(ci, action, sync); - - return 0; -} - -int arch_run_on_cpu(unsigned int cpu, struct cpu_action *action) -{ - return __arch_run_on_cpu(cpu, action, 1); -} - -int arch_run_on_cpu_async(unsigned int cpu, struct cpu_action *action) -{ - return __arch_run_on_cpu(cpu, action, 0); -} - -static int __arch_run_on_all_cpus(struct cpu_action *action, int sync) -{ - int i; - - for (i = 0; i < CONFIG_MAX_CPUS; i++) - action_run_on_cpu(cpu_info_for_cpu(i), action, sync); - - return 0; -} - -static int __arch_run_on_all_cpus_but_self(struct cpu_action *action, int sync) -{ - int i; - struct cpu_info *me = cpu_info(); - - for (i = 0; i < CONFIG_MAX_CPUS; i++) { - struct cpu_info *ci = cpu_info_for_cpu(i); - if (ci == me) - continue; - action_run_on_cpu(ci, action, sync); - } - - return 0; -} - -int arch_run_on_all_cpus(struct cpu_action *action) -{ - return __arch_run_on_all_cpus(action, 1); -} - -int arch_run_on_all_cpus_async(struct cpu_action *action) -{ - return __arch_run_on_all_cpus(action, 0); -} - -int arch_run_on_all_cpus_but_self(struct cpu_action *action) -{ - return __arch_run_on_all_cpus_but_self(action, 1); -} - -int arch_run_on_all_cpus_but_self_async(struct cpu_action *action) -{ - return __arch_run_on_all_cpus_but_self(action, 0); -} - - -void arch_cpu_wait_for_action(void) -{ - struct cpu_info *ci = cpu_info(); - struct cpu_action_queue *q = &ci->action_queue; - - while (1) { - struct cpu_action *orig; - struct cpu_action action; - - orig = wait_for_action(q, &action); - - action_run(&action); - action_queue_complete(q, orig); - } -} - -#if IS_ENABLED(CONFIG_SMP) -int boot_cpu(void) -{ - return cpu_is_bsp(); -} -#endif |