diff options
Diffstat (limited to 'arch/sh/include/asm/smp.h')
-rw-r--r-- | arch/sh/include/asm/smp.h | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/arch/sh/include/asm/smp.h b/arch/sh/include/asm/smp.h new file mode 100644 index 000000000..1a0d7cf71 --- /dev/null +++ b/arch/sh/include/asm/smp.h @@ -0,0 +1,84 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __ASM_SH_SMP_H +#define __ASM_SH_SMP_H + +#include <linux/bitops.h> +#include <linux/cpumask.h> +#include <asm/smp-ops.h> + +#ifdef CONFIG_SMP + +#include <linux/spinlock.h> +#include <linux/atomic.h> +#include <asm/current.h> +#include <asm/percpu.h> + +#define raw_smp_processor_id() (current_thread_info()->cpu) + +/* Map from cpu id to sequential logical cpu number. */ +extern int __cpu_number_map[NR_CPUS]; +#define cpu_number_map(cpu) __cpu_number_map[cpu] + +/* The reverse map from sequential logical cpu number to cpu id. */ +extern int __cpu_logical_map[NR_CPUS]; +#define cpu_logical_map(cpu) __cpu_logical_map[cpu] + +enum { + SMP_MSG_FUNCTION, + SMP_MSG_RESCHEDULE, + SMP_MSG_FUNCTION_SINGLE, + SMP_MSG_TIMER, + + SMP_MSG_NR, /* must be last */ +}; + +DECLARE_PER_CPU(int, cpu_state); + +void smp_message_recv(unsigned int msg); + +void arch_send_call_function_single_ipi(int cpu); +void arch_send_call_function_ipi_mask(const struct cpumask *mask); + +void native_play_dead(void); +void native_cpu_die(unsigned int cpu); +int native_cpu_disable(unsigned int cpu); + +#ifdef CONFIG_HOTPLUG_CPU +void play_dead_common(void); +extern int __cpu_disable(void); + +static inline void __cpu_die(unsigned int cpu) +{ + extern struct plat_smp_ops *mp_ops; /* private */ + + mp_ops->cpu_die(cpu); +} +#endif + +static inline int hard_smp_processor_id(void) +{ + extern struct plat_smp_ops *mp_ops; /* private */ + + if (!mp_ops) + return 0; /* boot CPU */ + + return mp_ops->smp_processor_id(); +} + +struct of_cpu_method { + const char *method; + struct plat_smp_ops *ops; +}; + +#define CPU_METHOD_OF_DECLARE(name, _method, _ops) \ + static const struct of_cpu_method __cpu_method_of_table_##name \ + __used __section(__cpu_method_of_table) \ + = { .method = _method, .ops = _ops } + +#else + +#define hard_smp_processor_id() (0) + +#endif /* CONFIG_SMP */ + +#endif /* __ASM_SH_SMP_H */ |