108 lines
2.4 KiB
C
108 lines
2.4 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0-only */
|
||
|
|
/*
|
||
|
|
* Copyright (C) 2012 Regents of the University of California
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _ASM_RISCV_SMP_H
|
||
|
|
#define _ASM_RISCV_SMP_H
|
||
|
|
|
||
|
|
#include <linux/cpumask.h>
|
||
|
|
#include <linux/irqreturn.h>
|
||
|
|
#include <linux/thread_info.h>
|
||
|
|
|
||
|
|
#define INVALID_HARTID ULONG_MAX
|
||
|
|
|
||
|
|
struct seq_file;
|
||
|
|
extern unsigned long boot_cpu_hartid;
|
||
|
|
|
||
|
|
struct riscv_ipi_ops {
|
||
|
|
void (*ipi_inject)(const struct cpumask *target);
|
||
|
|
void (*ipi_clear)(void);
|
||
|
|
};
|
||
|
|
|
||
|
|
#ifdef CONFIG_SMP
|
||
|
|
/*
|
||
|
|
* Mapping between linux logical cpu index and hartid.
|
||
|
|
*/
|
||
|
|
extern unsigned long __cpuid_to_hartid_map[NR_CPUS];
|
||
|
|
#define cpuid_to_hartid_map(cpu) __cpuid_to_hartid_map[cpu]
|
||
|
|
|
||
|
|
/* print IPI stats */
|
||
|
|
void show_ipi_stats(struct seq_file *p, int prec);
|
||
|
|
|
||
|
|
/* SMP initialization hook for setup_arch */
|
||
|
|
void __init setup_smp(void);
|
||
|
|
|
||
|
|
/* Called from C code, this handles an IPI. */
|
||
|
|
void handle_IPI(struct pt_regs *regs);
|
||
|
|
|
||
|
|
/* Hook for the generic smp_call_function_many() routine. */
|
||
|
|
void arch_send_call_function_ipi_mask(struct cpumask *mask);
|
||
|
|
|
||
|
|
/* Hook for the generic smp_call_function_single() routine. */
|
||
|
|
void arch_send_call_function_single_ipi(int cpu);
|
||
|
|
|
||
|
|
int riscv_hartid_to_cpuid(unsigned long hartid);
|
||
|
|
|
||
|
|
/* Set custom IPI operations */
|
||
|
|
void riscv_set_ipi_ops(const struct riscv_ipi_ops *ops);
|
||
|
|
|
||
|
|
/* Clear IPI for current CPU */
|
||
|
|
void riscv_clear_ipi(void);
|
||
|
|
|
||
|
|
/* Check other CPUs stop or not */
|
||
|
|
bool smp_crash_stop_failed(void);
|
||
|
|
|
||
|
|
/* Secondary hart entry */
|
||
|
|
asmlinkage void smp_callin(void);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Obtains the hart ID of the currently executing task. This relies on
|
||
|
|
* THREAD_INFO_IN_TASK, but we define that unconditionally.
|
||
|
|
*/
|
||
|
|
#define raw_smp_processor_id() (current_thread_info()->cpu)
|
||
|
|
|
||
|
|
#if defined CONFIG_HOTPLUG_CPU
|
||
|
|
int __cpu_disable(void);
|
||
|
|
void __cpu_die(unsigned int cpu);
|
||
|
|
#endif /* CONFIG_HOTPLUG_CPU */
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
static inline void show_ipi_stats(struct seq_file *p, int prec)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline int riscv_hartid_to_cpuid(unsigned long hartid)
|
||
|
|
{
|
||
|
|
if (hartid == boot_cpu_hartid)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
static inline unsigned long cpuid_to_hartid_map(int cpu)
|
||
|
|
{
|
||
|
|
return boot_cpu_hartid;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void riscv_set_ipi_ops(const struct riscv_ipi_ops *ops)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void riscv_clear_ipi(void)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* CONFIG_SMP */
|
||
|
|
|
||
|
|
#if defined(CONFIG_HOTPLUG_CPU) && (CONFIG_SMP)
|
||
|
|
bool cpu_has_hotplug(unsigned int cpu);
|
||
|
|
#else
|
||
|
|
static inline bool cpu_has_hotplug(unsigned int cpu)
|
||
|
|
{
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif /* _ASM_RISCV_SMP_H */
|