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 topology_physical_package_id(cpu) (cpu_data[cpu].package) 41 #define topology_core_id(cpu) (cpu_data[cpu].core) 42 #define topology_core_cpumask(cpu) (&cpu_core_map[cpu]) 43 #define topology_thread_cpumask(cpu) (&cpu_sibling_map[cpu]) 44 45 #define SMP_RESCHEDULE_YOURSELF 0x1 /* XXX braindead */ 46 #define SMP_CALL_FUNCTION 0x2 47 /* Octeon - Tell another core to flush its icache */ 48 #define SMP_ICACHE_FLUSH 0x4 49 /* Used by kexec crashdump to save all cpu's state */ 50 #define SMP_DUMP 0x8 51 #define SMP_ASK_C0COUNT 0x10 52 53 extern volatile cpumask_t cpu_callin_map; 54 55 /* Mask of CPUs which are currently definitely operating coherently */ 56 extern cpumask_t cpu_coherent_mask; 57 58 extern void asmlinkage smp_bootstrap(void); 59 60 /* 61 * this function sends a 'reschedule' IPI to another CPU. 62 * it goes straight through and wastes no time serializing 63 * anything. Worst case is that we lose a reschedule ... 64 */ 65 static inline void smp_send_reschedule(int cpu) 66 { 67 extern struct plat_smp_ops *mp_ops; /* private */ 68 69 mp_ops->send_ipi_single(cpu, SMP_RESCHEDULE_YOURSELF); 70 } 71 72 #ifdef CONFIG_HOTPLUG_CPU 73 static inline int __cpu_disable(void) 74 { 75 extern struct plat_smp_ops *mp_ops; /* private */ 76 77 return mp_ops->cpu_disable(); 78 } 79 80 static inline void __cpu_die(unsigned int cpu) 81 { 82 extern struct plat_smp_ops *mp_ops; /* private */ 83 84 mp_ops->cpu_die(cpu); 85 } 86 87 extern void play_dead(void); 88 #endif 89 90 extern asmlinkage void smp_call_function_interrupt(void); 91 92 static inline void arch_send_call_function_single_ipi(int cpu) 93 { 94 extern struct plat_smp_ops *mp_ops; /* private */ 95 96 mp_ops->send_ipi_mask(&cpumask_of_cpu(cpu), SMP_CALL_FUNCTION); 97 } 98 99 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) 100 { 101 extern struct plat_smp_ops *mp_ops; /* private */ 102 103 mp_ops->send_ipi_mask(mask, SMP_CALL_FUNCTION); 104 } 105 106 #if defined(CONFIG_KEXEC) 107 extern void (*dump_ipi_function_ptr)(void *); 108 void dump_send_ipi(void (*dump_ipi_callback)(void *)); 109 #endif 110 #endif /* __ASM_SMP_H */ 111