1 /* 2 * This file is subject to the terms and conditions of the GNU General 3 * Public License. See the file "COPYING" in the main directory of this 4 * archive for more details. 5 * 6 * Copyright (C) 2000 - 2001 by Kanoj Sarcar (kanoj@sgi.com) 7 * Copyright (C) 2000 - 2001 by Silicon Graphics, Inc. 8 * Copyright (C) 2000, 2001, 2002 Ralf Baechle 9 * Copyright (C) 2000, 2001 Broadcom Corporation 10 */ 11 #ifndef __ASM_SMP_H 12 #define __ASM_SMP_H 13 14 #include <linux/bitops.h> 15 #include <linux/linkage.h> 16 #include <linux/smp.h> 17 #include <linux/threads.h> 18 #include <linux/cpumask.h> 19 #include <linux/cache.h> 20 21 #include <linux/atomic.h> 22 #include <asm/smp-ops.h> 23 #include <asm/percpu.h> 24 25 extern int smp_num_siblings; 26 DECLARE_PER_CPU_SHARED_ALIGNED(cpumask_t, cpu_sibling_map); 27 28 #define raw_smp_processor_id() (current_thread_info()->cpu) 29 30 /* Map from cpu id to sequential logical cpu number. This will only 31 not be idempotent when cpus failed to come on-line. */ 32 extern int __cpu_number_map[NR_CPUS]; 33 #define cpu_number_map(cpu) __cpu_number_map[cpu] 34 35 /* The reverse map from sequential logical cpu number to cpu id. */ 36 extern int __cpu_logical_map[NR_CPUS]; 37 #define cpu_logical_map(cpu) __cpu_logical_map[cpu] 38 39 #define NO_PROC_ID (-1) 40 41 #define SMP_RESCHEDULE_YOURSELF 0x1 /* XXX braindead */ 42 #define SMP_CALL_FUNCTION 0x2 43 /* Octeon - Tell another core to flush its icache */ 44 #define SMP_ICACHE_FLUSH 0x4 45 /* Used by kexec crashdump to save all cpu's state */ 46 #define SMP_DUMP 0x8 47 48 extern volatile cpumask_t cpu_callin_map; 49 50 extern void asmlinkage smp_bootstrap(void); 51 52 /* 53 * this function sends a 'reschedule' IPI to another CPU. 54 * it goes straight through and wastes no time serializing 55 * anything. Worst case is that we lose a reschedule ... 56 */ smp_send_reschedule(int cpu)57static inline void smp_send_reschedule(int cpu) 58 { 59 extern struct plat_smp_ops *mp_ops; /* private */ 60 61 mp_ops->send_ipi_single(cpu, SMP_RESCHEDULE_YOURSELF); 62 } 63 64 #ifdef CONFIG_HOTPLUG_CPU __cpu_disable(void)65static inline int __cpu_disable(void) 66 { 67 extern struct plat_smp_ops *mp_ops; /* private */ 68 69 return mp_ops->cpu_disable(); 70 } 71 __cpu_die(unsigned int cpu)72static inline void __cpu_die(unsigned int cpu) 73 { 74 extern struct plat_smp_ops *mp_ops; /* private */ 75 76 mp_ops->cpu_die(cpu); 77 } 78 79 extern void play_dead(void); 80 #endif 81 82 extern asmlinkage void smp_call_function_interrupt(void); 83 arch_send_call_function_single_ipi(int cpu)84static inline void arch_send_call_function_single_ipi(int cpu) 85 { 86 extern struct plat_smp_ops *mp_ops; /* private */ 87 88 mp_ops->send_ipi_mask(&cpumask_of_cpu(cpu), SMP_CALL_FUNCTION); 89 } 90 arch_send_call_function_ipi_mask(const struct cpumask * mask)91static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) 92 { 93 extern struct plat_smp_ops *mp_ops; /* private */ 94 95 mp_ops->send_ipi_mask(mask, SMP_CALL_FUNCTION); 96 } 97 98 #if defined(CONFIG_KEXEC) 99 extern void (*dump_ipi_function_ptr)(void *); 100 void dump_send_ipi(void (*dump_ipi_callback)(void *)); 101 #endif 102 #endif /* __ASM_SMP_H */ 103