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
23extern int smp_num_siblings;
24extern cpumask_t cpu_sibling_map[];
25extern cpumask_t cpu_core_map[];
26extern cpumask_t cpu_foreign_map;
27
28#define raw_smp_processor_id() (current_thread_info()->cpu)
29
30/* Map from cpu id to sequential logical cpu number.  This will only
31   not be idempotent when cpus failed to come on-line.	*/
32extern int __cpu_number_map[NR_CPUS];
33#define cpu_number_map(cpu)  __cpu_number_map[cpu]
34
35/* The reverse map from sequential logical cpu number to cpu id.  */
36extern int __cpu_logical_map[NR_CPUS];
37#define cpu_logical_map(cpu)  __cpu_logical_map[cpu]
38
39#define NO_PROC_ID	(-1)
40
41#define SMP_RESCHEDULE_YOURSELF 0x1	/* XXX braindead */
42#define SMP_CALL_FUNCTION	0x2
43/* Octeon - Tell another core to flush its icache */
44#define SMP_ICACHE_FLUSH	0x4
45/* Used by kexec crashdump to save all cpu's state */
46#define SMP_DUMP		0x8
47#define SMP_ASK_C0COUNT		0x10
48
49extern cpumask_t cpu_callin_map;
50
51/* Mask of CPUs which are currently definitely operating coherently */
52extern cpumask_t cpu_coherent_mask;
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
68#ifdef CONFIG_HOTPLUG_CPU
69static inline int __cpu_disable(void)
70{
71	extern struct plat_smp_ops *mp_ops;	/* private */
72
73	return mp_ops->cpu_disable();
74}
75
76static inline void __cpu_die(unsigned int cpu)
77{
78	extern struct plat_smp_ops *mp_ops;	/* private */
79
80	mp_ops->cpu_die(cpu);
81}
82
83extern void play_dead(void);
84#endif
85
86extern asmlinkage void smp_call_function_interrupt(void);
87
88static inline void arch_send_call_function_single_ipi(int cpu)
89{
90	extern struct plat_smp_ops *mp_ops;	/* private */
91
92	mp_ops->send_ipi_mask(cpumask_of(cpu), SMP_CALL_FUNCTION);
93}
94
95static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
96{
97	extern struct plat_smp_ops *mp_ops;	/* private */
98
99	mp_ops->send_ipi_mask(mask, SMP_CALL_FUNCTION);
100}
101
102#if defined(CONFIG_KEXEC)
103extern void (*dump_ipi_function_ptr)(void *);
104void dump_send_ipi(void (*dump_ipi_callback)(void *));
105#endif
106#endif /* __ASM_SMP_H */
107