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/* SPDX-License-Identifier: GPL-2.0 */
/* smp.h: Sparc specific SMP stuff.
*
* Copyright (C) 1996 David S. Miller ([email protected])
*/
#ifndef _SPARC_SMP_H
#define _SPARC_SMP_H
#include <linux/threads.h>
#include <asm/head.h>
#ifndef __ASSEMBLY__
#include <linux/cpumask.h>
#endif /* __ASSEMBLY__ */
#ifdef CONFIG_SMP
#ifndef __ASSEMBLY__
#include <asm/ptrace.h>
#include <asm/asi.h>
#include <linux/atomic.h>
/*
* Private routines/data
*/
extern unsigned char boot_cpu_id;
extern volatile unsigned long cpu_callin_map[NR_CPUS];
extern cpumask_t smp_commenced_mask;
extern struct linux_prom_registers smp_penguin_ctable;
typedef void (*smpfunc_t)(unsigned long, unsigned long, unsigned long,
unsigned long, unsigned long);
void cpu_panic(void);
/*
* General functions that each host system must provide.
*/
void sun4m_init_smp(void);
void sun4d_init_smp(void);
void smp_callin(void);
void smp_store_cpu_info(int);
void smp_resched_interrupt(void);
void smp_call_function_single_interrupt(void);
void smp_call_function_interrupt(void);
struct seq_file;
void smp_bogo(struct seq_file *);
void smp_info(struct seq_file *);
struct sparc32_ipi_ops {
void (*cross_call)(smpfunc_t func, cpumask_t mask, unsigned long arg1,
unsigned long arg2, unsigned long arg3,
unsigned long arg4);
void (*resched)(int cpu);
void (*single)(int cpu);
void (*mask_one)(int cpu);
};
extern const struct sparc32_ipi_ops *sparc32_ipi_ops;
static inline void xc0(smpfunc_t func)
{
sparc32_ipi_ops->cross_call(func, *cpu_online_mask, 0, 0, 0, 0);
}
static inline void xc1(smpfunc_t func, unsigned long arg1)
{
sparc32_ipi_ops->cross_call(func, *cpu_online_mask, arg1, 0, 0, 0);
}
static inline void xc2(smpfunc_t func, unsigned long arg1, unsigned long arg2)
{
sparc32_ipi_ops->cross_call(func, *cpu_online_mask, arg1, arg2, 0, 0);
}
static inline void xc3(smpfunc_t func, unsigned long arg1, unsigned long arg2,
unsigned long arg3)
{
sparc32_ipi_ops->cross_call(func, *cpu_online_mask,
arg1, arg2, arg3, 0);
}
static inline void xc4(smpfunc_t func, unsigned long arg1, unsigned long arg2,
unsigned long arg3, unsigned long arg4)
{
sparc32_ipi_ops->cross_call(func, *cpu_online_mask,
arg1, arg2, arg3, arg4);
}
void arch_send_call_function_single_ipi(int cpu);
void arch_send_call_function_ipi_mask(const struct cpumask *mask);
static inline int cpu_logical_map(int cpu)
{
return cpu;
}
int hard_smp_processor_id(void);
#define raw_smp_processor_id() (current_thread_info()->cpu)
void smp_setup_cpu_possible_map(void);
#endif /* !(__ASSEMBLY__) */
/* Sparc specific messages. */
#define MSG_CROSS_CALL 0x0005 /* run func on cpus */
/* Empirical PROM processor mailbox constants. If the per-cpu mailbox
* contains something other than one of these then the ipi is from
* Linux's active_kernel_processor. This facility exists so that
* the boot monitor can capture all the other cpus when one catches
* a watchdog reset or the user enters the monitor using L1-A keys.
*/
#define MBOX_STOPCPU 0xFB
#define MBOX_IDLECPU 0xFC
#define MBOX_IDLECPU2 0xFD
#define MBOX_STOPCPU2 0xFE
#else /* SMP */
#define hard_smp_processor_id() 0
#define smp_setup_cpu_possible_map() do { } while (0)
#endif /* !(SMP) */
#endif /* !(_SPARC_SMP_H) */
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