| /* |
| * 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/compiler.h> |
| #include <linux/linkage.h> |
| #include <linux/threads.h> |
| #include <linux/cpumask.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 unsigned int smp_max_threads __initdata; |
| |
| extern asmlinkage void smp_bootstrap(void); |
| |
| extern void calculate_cpu_foreign_map(void); |
| |
| asmlinkage void start_secondary(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 arch_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 __noreturn play_dead(void); |
| #endif |
| |
| #ifdef CONFIG_KEXEC_CORE |
| 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_single(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 */ |