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 27 #define raw_smp_processor_id() (current_thread_info()->cpu) 28 29 /* Map from cpu id to sequential logical cpu number. This will only 30 not be idempotent when cpus failed to come on-line. */ 31 extern int __cpu_number_map[NR_CPUS]; 32 #define cpu_number_map(cpu) __cpu_number_map[cpu] 33 34 /* The reverse map from sequential logical cpu number to cpu id. */ 35 extern int __cpu_logical_map[NR_CPUS]; 36 #define cpu_logical_map(cpu) __cpu_logical_map[cpu] 37 38 #define NO_PROC_ID (-1) 39 40 #define SMP_RESCHEDULE_YOURSELF 0x1 /* XXX braindead */ 41 #define SMP_CALL_FUNCTION 0x2 42 /* Octeon - Tell another core to flush its icache */ 43 #define SMP_ICACHE_FLUSH 0x4 44 /* Used by kexec crashdump to save all cpu's state */ 45 #define SMP_DUMP 0x8 46 #define SMP_ASK_C0COUNT 0x10 47 48 extern cpumask_t cpu_callin_map; 49 50 /* Mask of CPUs which are currently definitely operating coherently */ 51 extern cpumask_t cpu_coherent_mask; 52 53 extern void asmlinkage smp_bootstrap(void); 54 55 /* 56 * this function sends a 'reschedule' IPI to another CPU. 57 * it goes straight through and wastes no time serializing 58 * anything. Worst case is that we lose a reschedule ... 59 */ 60 static inline void smp_send_reschedule(int cpu) 61 { 62 extern struct plat_smp_ops *mp_ops; /* private */ 63 64 mp_ops->send_ipi_single(cpu, SMP_RESCHEDULE_YOURSELF); 65 } 66 67 #ifdef CONFIG_HOTPLUG_CPU 68 static inline int __cpu_disable(void) 69 { 70 extern struct plat_smp_ops *mp_ops; /* private */ 71 72 return mp_ops->cpu_disable(); 73 } 74 75 static inline void __cpu_die(unsigned int cpu) 76 { 77 extern struct plat_smp_ops *mp_ops; /* private */ 78 79 mp_ops->cpu_die(cpu); 80 } 81 82 extern void play_dead(void); 83 #endif 84 85 extern asmlinkage void smp_call_function_interrupt(void); 86 87 static inline void arch_send_call_function_single_ipi(int cpu) 88 { 89 extern struct plat_smp_ops *mp_ops; /* private */ 90 91 mp_ops->send_ipi_mask(cpumask_of(cpu), SMP_CALL_FUNCTION); 92 } 93 94 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) 95 { 96 extern struct plat_smp_ops *mp_ops; /* private */ 97 98 mp_ops->send_ipi_mask(mask, SMP_CALL_FUNCTION); 99 } 100 101 #if defined(CONFIG_KEXEC) 102 extern void (*dump_ipi_function_ptr)(void *); 103 void dump_send_ipi(void (*dump_ipi_callback)(void *)); 104 #endif 105 #endif /* __ASM_SMP_H */ 106