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 extern cpumask_t cpu_core_map[]; 26 extern cpumask_t cpu_foreign_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 #define SMP_ASK_C0COUNT 0x10 48 49 extern cpumask_t cpu_callin_map; 50 51 /* Mask of CPUs which are currently definitely operating coherently */ 52 extern cpumask_t cpu_coherent_mask; 53 54 extern void asmlinkage smp_bootstrap(void); 55 56 /* 57 * this function sends a 'reschedule' IPI to another CPU. 58 * it goes straight through and wastes no time serializing 59 * anything. Worst case is that we lose a reschedule ... 60 */ 61 static inline void smp_send_reschedule(int cpu) 62 { 63 extern struct plat_smp_ops *mp_ops; /* private */ 64 65 mp_ops->send_ipi_single(cpu, SMP_RESCHEDULE_YOURSELF); 66 } 67 68 #ifdef CONFIG_HOTPLUG_CPU 69 static inline int __cpu_disable(void) 70 { 71 extern struct plat_smp_ops *mp_ops; /* private */ 72 73 return mp_ops->cpu_disable(); 74 } 75 76 static inline void __cpu_die(unsigned int cpu) 77 { 78 extern struct plat_smp_ops *mp_ops; /* private */ 79 80 mp_ops->cpu_die(cpu); 81 } 82 83 extern void play_dead(void); 84 #endif 85 86 static inline void arch_send_call_function_single_ipi(int cpu) 87 { 88 extern struct plat_smp_ops *mp_ops; /* private */ 89 90 mp_ops->send_ipi_mask(cpumask_of(cpu), SMP_CALL_FUNCTION); 91 } 92 93 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) 94 { 95 extern struct plat_smp_ops *mp_ops; /* private */ 96 97 mp_ops->send_ipi_mask(mask, SMP_CALL_FUNCTION); 98 } 99 100 #if defined(CONFIG_KEXEC) 101 extern void (*dump_ipi_function_ptr)(void *); 102 void dump_send_ipi(void (*dump_ipi_callback)(void *)); 103 #endif 104 #endif /* __ASM_SMP_H */ 105