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