1/*
2 * This program is free software; you can redistribute it and/or
3 * modify it under the terms of the GNU General Public License
4 * as published by the Free Software Foundation; either version 2
5 * of the License, or (at your option) any later version.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
15 *
16 * Copyright (C) 2000 - 2001 by Kanoj Sarcar (kanoj@sgi.com)
17 * Copyright (C) 2000, 2001, 2002 by Ralf Baechle
18 * Copyright (C) 2000 - 2001 by Silicon Graphics, Inc.
19 * Copyright (C) 2000, 2001 Broadcom Corporation
20 */
21#ifndef _ASM_SMP_H
22#define _ASM_SMP_H
23
24#include <linux/config.h>
25
26#ifdef CONFIG_SMP
27
28#include <linux/threads.h>
29#include <asm/atomic.h>
30#include <asm/current.h>
31
32#define smp_processor_id()	(current->processor)
33
34#define PROC_CHANGE_PENALTY	20
35
36/* Map from cpu id to sequential logical cpu number.  This will only
37   not be idempotent when cpus failed to come on-line.  */
38extern int __cpu_number_map[NR_CPUS];
39#define cpu_number_map(cpu)  __cpu_number_map[cpu]
40
41/* The reverse map from sequential logical cpu number to cpu id.  */
42extern int __cpu_logical_map[NR_CPUS];
43#define cpu_logical_map(cpu)  __cpu_logical_map[cpu]
44
45#define NO_PROC_ID	(-1)
46
47#define SMP_RESCHEDULE_YOURSELF	0x1
48#define SMP_CALL_FUNCTION	0x2
49
50#if (NR_CPUS <= _MIPS_SZLONG)
51
52typedef unsigned long   cpumask_t;
53
54#define CPUMASK_CLRALL(p)	do { (p) = 0; } while(0)
55#define CPUMASK_SETB(p, bit)	(p) |= 1UL << (bit)
56#define CPUMASK_CLRB(p, bit)	(p) &= ~(1UL << (bit))
57#define CPUMASK_TSTB(p, bit)	((p) & (1UL << (bit)))
58
59#elif (NR_CPUS <= 128)
60
61/*
62 * The foll should work till 128 cpus.
63 */
64#define CPUMASK_SIZE		(NR_CPUS/_MIPS_SZLONG)
65#define CPUMASK_INDEX(bit)	((bit) >> 6)
66#define CPUMASK_SHFT(bit)	((bit) & 0x3f)
67
68typedef struct {
69	unsigned long	_bits[CPUMASK_SIZE];
70} cpumask_t;
71
72#define	CPUMASK_CLRALL(p)	(p)._bits[0] = 0, (p)._bits[1] = 0
73#define CPUMASK_SETB(p, bit)	(p)._bits[CPUMASK_INDEX(bit)] |= \
74					(1UL << CPUMASK_SHFT(bit))
75#define CPUMASK_CLRB(p, bit)	(p)._bits[CPUMASK_INDEX(bit)] &= \
76					~(1UL << CPUMASK_SHFT(bit))
77#define CPUMASK_TSTB(p, bit)	((p)._bits[CPUMASK_INDEX(bit)] & \
78					(1UL << CPUMASK_SHFT(bit)))
79
80#else
81#error cpumask macros only defined for 128p kernels
82#endif
83
84struct call_data_struct {
85	void		(*func)(void *);
86	void		*info;
87	atomic_t	started;
88	atomic_t	finished;
89	int		wait;
90};
91
92extern struct call_data_struct *call_data;
93
94extern cpumask_t cpu_online_map;
95
96#endif /* CONFIG_SMP */
97#endif /* _ASM_SMP_H */
98