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
38#define SMP_RESCHEDULE_YOURSELF	0x1	/* XXX braindead */
39#define SMP_CALL_FUNCTION	0x2
40
41extern cpumask_t phys_cpu_present_map;
42#define cpu_possible_map	phys_cpu_present_map
43
44extern void asmlinkage smp_bootstrap(void);
45
46/*
47 * this function sends a 'reschedule' IPI to another CPU.
48 * it goes straight through and wastes no time serializing
49 * anything. Worst case is that we lose a reschedule ...
50 */
51static inline void smp_send_reschedule(int cpu)
52{
53	extern struct plat_smp_ops *mp_ops;	/* private */
54
55	mp_ops->send_ipi_single(cpu, SMP_RESCHEDULE_YOURSELF);
56}
57
58extern asmlinkage void smp_call_function_interrupt(void);
59
60extern void arch_send_call_function_single_ipi(int cpu);
61extern void arch_send_call_function_ipi(cpumask_t mask);
62
63#endif /* __ASM_SMP_H */
64