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/* * This file is subject to the terms and conditions of the GNU General * Public License. See the file "COPYING" in the main directory of this * archive for more details. * * Copyright (C) 2000 - 2001 by Kanoj Sarcar (kanoj@sgi.com) * Copyright (C) 2000 - 2001 by Silicon Graphics, Inc. * Copyright (C) 2000, 2001, 2002 Ralf Baechle * Copyright (C) 2000, 2001 Broadcom Corporation */ #ifndef __ASM_SMP_H #define __ASM_SMP_H #include <linux/bitops.h> #include <linux/linkage.h> #include <linux/smp.h> #include <linux/threads.h> #include <linux/cpumask.h> #include <linux/atomic.h> #include <asm/smp-ops.h> extern int smp_num_siblings; extern cpumask_t cpu_sibling_map[]; extern cpumask_t cpu_core_map[]; extern cpumask_t cpu_foreign_map[]; static inline int raw_smp_processor_id(void) { #if defined(__VDSO__) extern int vdso_smp_processor_id(void) __compiletime_error("VDSO should not call smp_processor_id()"); return vdso_smp_processor_id(); #else return current_thread_info()->cpu; #endif } #define raw_smp_processor_id raw_smp_processor_id /* Map from cpu id to sequential logical cpu number. This will only not be idempotent when cpus failed to come on-line. */ extern int __cpu_number_map[CONFIG_MIPS_NR_CPU_NR_MAP]; #define cpu_number_map(cpu) __cpu_number_map[cpu] /* The reverse map from sequential logical cpu number to cpu id. */ extern int __cpu_logical_map[NR_CPUS]; #define cpu_logical_map(cpu) __cpu_logical_map[cpu] #define NO_PROC_ID (-1) #define SMP_RESCHEDULE_YOURSELF 0x1 /* XXX braindead */ #define SMP_CALL_FUNCTION 0x2 /* Octeon - Tell another core to flush its icache */ #define SMP_ICACHE_FLUSH 0x4 #define SMP_ASK_C0COUNT 0x8 /* Mask of CPUs which are currently definitely operating coherently */ extern cpumask_t cpu_coherent_mask; extern asmlinkage void smp_bootstrap(void); extern void calculate_cpu_foreign_map(void); /* * this function sends a 'reschedule' IPI to another CPU. * it goes straight through and wastes no time serializing * anything. Worst case is that we lose a reschedule ... */ static inline void smp_send_reschedule(int cpu) { extern const struct plat_smp_ops *mp_ops; /* private */ mp_ops->send_ipi_single(cpu, SMP_RESCHEDULE_YOURSELF); } #ifdef CONFIG_HOTPLUG_CPU static inline int __cpu_disable(void) { extern const struct plat_smp_ops *mp_ops; /* private */ return mp_ops->cpu_disable(); } static inline void __cpu_die(unsigned int cpu) { extern const struct plat_smp_ops *mp_ops; /* private */ mp_ops->cpu_die(cpu); } extern void play_dead(void); #endif #ifdef CONFIG_KEXEC static inline void kexec_nonboot_cpu(void) { extern const struct plat_smp_ops *mp_ops; /* private */ return mp_ops->kexec_nonboot_cpu(); } static inline void *kexec_nonboot_cpu_func(void) { extern const struct plat_smp_ops *mp_ops; /* private */ return mp_ops->kexec_nonboot_cpu; } #endif /* * This function will set up the necessary IPIs for Linux to communicate * with the CPUs in mask. * Return 0 on success. */ int mips_smp_ipi_allocate(const struct cpumask *mask); /* * This function will free up IPIs allocated with mips_smp_ipi_allocate to the * CPUs in mask, which must be a subset of the IPIs that have been configured. * Return 0 on success. */ int mips_smp_ipi_free(const struct cpumask *mask); static inline void arch_send_call_function_single_ipi(int cpu) { extern const struct plat_smp_ops *mp_ops; /* private */ mp_ops->send_ipi_mask(cpumask_of(cpu), SMP_CALL_FUNCTION); } static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) { extern const struct plat_smp_ops *mp_ops; /* private */ mp_ops->send_ipi_mask(mask, SMP_CALL_FUNCTION); } #endif /* __ASM_SMP_H */
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