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/*
* Copyright (C) 2012 Regents of the University of California
*
* 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.
*
* 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.
*/
#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;
#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);
/* 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(int hartid);
void riscv_cpuid_to_hartid_mask(const struct cpumask *in, struct cpumask *out);
/*
* 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)
#else
static inline void show_ipi_stats(struct seq_file *p, int prec)
{
}
static inline int riscv_hartid_to_cpuid(int 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_cpuid_to_hartid_mask(const struct cpumask *in,
struct cpumask *out)
{
cpumask_set_cpu(cpuid_to_hartid_map(0), out);
}
#endif /* CONFIG_SMP */
#endif /* _ASM_RISCV_SMP_H */
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