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.
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
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>
20 #include <linux/atomic.h>
21 #include <asm/smp-ops.h>
23 extern int smp_num_siblings
;
24 extern cpumask_t cpu_sibling_map
[];
25 extern cpumask_t cpu_core_map
[];
27 #define raw_smp_processor_id() (current_thread_info()->cpu)
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]
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]
38 #define NO_PROC_ID (-1)
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 */
46 #define SMP_ASK_C0COUNT 0x10
48 extern cpumask_t cpu_callin_map
;
50 /* Mask of CPUs which are currently definitely operating coherently */
51 extern cpumask_t cpu_coherent_mask
;
53 extern void asmlinkage
smp_bootstrap(void);
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 ...
60 static inline void smp_send_reschedule(int cpu
)
62 extern struct plat_smp_ops
*mp_ops
; /* private */
64 mp_ops
->send_ipi_single(cpu
, SMP_RESCHEDULE_YOURSELF
);
67 #ifdef CONFIG_HOTPLUG_CPU
68 static inline int __cpu_disable(void)
70 extern struct plat_smp_ops
*mp_ops
; /* private */
72 return mp_ops
->cpu_disable();
75 static inline void __cpu_die(unsigned int cpu
)
77 extern struct plat_smp_ops
*mp_ops
; /* private */
82 extern void play_dead(void);
85 extern asmlinkage
void smp_call_function_interrupt(void);
87 static inline void arch_send_call_function_single_ipi(int cpu
)
89 extern struct plat_smp_ops
*mp_ops
; /* private */
91 mp_ops
->send_ipi_mask(cpumask_of(cpu
), SMP_CALL_FUNCTION
);
94 static inline void arch_send_call_function_ipi_mask(const struct cpumask
*mask
)
96 extern struct plat_smp_ops
*mp_ops
; /* private */
98 mp_ops
->send_ipi_mask(mask
, SMP_CALL_FUNCTION
);
101 #if defined(CONFIG_KEXEC)
102 extern void (*dump_ipi_function_ptr
)(void *);
103 void dump_send_ipi(void (*dump_ipi_callback
)(void *));
105 #endif /* __ASM_SMP_H */