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/* SPDX-License-Identifier: GPL-2.0 */ /* smp.h: Sparc specific SMP stuff. * * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu) */ #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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