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Linux kernel mirror (for testing)
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linux
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/threads.h>
17#include <linux/cpumask.h>
18
19#include <asm/atomic.h>
20#include <asm/smp-ops.h>
21
22extern int smp_num_siblings;
23extern cpumask_t cpu_sibling_map[];
24
25#define raw_smp_processor_id() (current_thread_info()->cpu)
26
27/* Map from cpu id to sequential logical cpu number. This will only
28 not be idempotent when cpus failed to come on-line. */
29extern int __cpu_number_map[NR_CPUS];
30#define cpu_number_map(cpu) __cpu_number_map[cpu]
31
32/* The reverse map from sequential logical cpu number to cpu id. */
33extern int __cpu_logical_map[NR_CPUS];
34#define cpu_logical_map(cpu) __cpu_logical_map[cpu]
35
36#define NO_PROC_ID (-1)
37
38struct call_data_struct {
39 void (*func)(void *);
40 void *info;
41 atomic_t started;
42 atomic_t finished;
43 int wait;
44};
45
46extern struct call_data_struct *call_data;
47
48#define SMP_RESCHEDULE_YOURSELF 0x1 /* XXX braindead */
49#define SMP_CALL_FUNCTION 0x2
50
51extern cpumask_t phys_cpu_present_map;
52#define cpu_possible_map phys_cpu_present_map
53
54extern 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 */
61static 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
68extern asmlinkage void smp_call_function_interrupt(void);
69
70#endif /* __ASM_SMP_H */