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 20 #include <linux/atomic.h> 21 #include <asm/smp-ops.h> 22 23 extern int smp_num_siblings; 24 extern cpumask_t cpu_sibling_map[]; 25 26 #define raw_smp_processor_id() (current_thread_info()->cpu) 27 28 /* Map from cpu id to sequential logical cpu number. This will only 29 not be idempotent when cpus failed to come on-line. */ 30 extern int __cpu_number_map[NR_CPUS]; 31 #define cpu_number_map(cpu) __cpu_number_map[cpu] 32 33 /* The reverse map from sequential logical cpu number to cpu id. */ 34 extern int __cpu_logical_map[NR_CPUS]; 35 #define cpu_logical_map(cpu) __cpu_logical_map[cpu] 36 37 #define NO_PROC_ID (-1) 38 39 #define SMP_RESCHEDULE_YOURSELF 0x1 /* XXX braindead */ 40 #define SMP_CALL_FUNCTION 0x2 41 /* Octeon - Tell another core to flush its icache */ 42 #define SMP_ICACHE_FLUSH 0x4 43 /* Used by kexec crashdump to save all cpu's state */ 44 #define SMP_DUMP 0x8 45 #define SMP_ASK_C0COUNT 0x10 46 47 extern volatile cpumask_t cpu_callin_map; 48 49 extern void asmlinkage smp_bootstrap(void); 50 51 /* 52 * this function sends a 'reschedule' IPI to another CPU. 53 * it goes straight through and wastes no time serializing 54 * anything. Worst case is that we lose a reschedule ... 55 */ 56 static inline void smp_send_reschedule(int cpu) 57 { 58 extern struct plat_smp_ops *mp_ops; /* private */ 59 60 mp_ops->send_ipi_single(cpu, SMP_RESCHEDULE_YOURSELF); 61 } 62 63 #ifdef CONFIG_HOTPLUG_CPU 64 static inline int __cpu_disable(void) 65 { 66 extern struct plat_smp_ops *mp_ops; /* private */ 67 68 return mp_ops->cpu_disable(); 69 } 70 71 static inline void __cpu_die(unsigned int cpu) 72 { 73 extern struct plat_smp_ops *mp_ops; /* private */ 74 75 mp_ops->cpu_die(cpu); 76 } 77 78 extern void play_dead(void); 79 #endif 80 81 extern asmlinkage void smp_call_function_interrupt(void); 82 83 static inline void arch_send_call_function_single_ipi(int cpu) 84 { 85 extern struct plat_smp_ops *mp_ops; /* private */ 86 87 mp_ops->send_ipi_mask(&cpumask_of_cpu(cpu), SMP_CALL_FUNCTION); 88 } 89 90 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) 91 { 92 extern struct plat_smp_ops *mp_ops; /* private */ 93 94 mp_ops->send_ipi_mask(mask, SMP_CALL_FUNCTION); 95 } 96 97 #if defined(CONFIG_KEXEC) 98 extern void (*dump_ipi_function_ptr)(void *); 99 void dump_send_ipi(void (*dump_ipi_callback)(void *)); 100 #endif 101 #endif /* __ASM_SMP_H */ 102