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-rw-r--r--include/asm-powerpc/smp.h119
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1/*
2 * smp.h: PowerPC-specific SMP code.
3 *
4 * Original was a copy of sparc smp.h. Now heavily modified
5 * for PPC.
6 *
7 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
8 * Copyright (C) 1996-2001 Cort Dougan <cort@fsmlabs.com>
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 */
15
16#ifndef _ASM_POWERPC_SMP_H
17#define _ASM_POWERPC_SMP_H
18#ifdef __KERNEL__
19
20#include <linux/config.h>
21#include <linux/threads.h>
22#include <linux/cpumask.h>
23#include <linux/kernel.h>
24
25#ifndef __ASSEMBLY__
26
27#ifdef CONFIG_PPC64
28#include <asm/paca.h>
29#endif
30
31extern int boot_cpuid;
32extern int boot_cpuid_phys;
33
34extern void cpu_die(void);
35
36#ifdef CONFIG_SMP
37
38extern void smp_send_debugger_break(int cpu);
39struct pt_regs;
40extern void smp_message_recv(int, struct pt_regs *);
41
42#ifdef CONFIG_HOTPLUG_CPU
43extern void fixup_irqs(cpumask_t map);
44int generic_cpu_disable(void);
45int generic_cpu_enable(unsigned int cpu);
46void generic_cpu_die(unsigned int cpu);
47void generic_mach_cpu_die(void);
48#endif
49
50#ifdef CONFIG_PPC64
51#define raw_smp_processor_id() (get_paca()->paca_index)
52#define hard_smp_processor_id() (get_paca()->hw_cpu_id)
53#else
54/* 32-bit */
55extern int smp_hw_index[];
56
57#define raw_smp_processor_id() (current_thread_info()->cpu)
58#define hard_smp_processor_id() (smp_hw_index[smp_processor_id()])
59#define get_hard_smp_processor_id(cpu) (smp_hw_index[(cpu)])
60#define set_hard_smp_processor_id(cpu, phys)\
61 (smp_hw_index[(cpu)] = (phys))
62#endif
63
64extern cpumask_t cpu_sibling_map[NR_CPUS];
65
66/* Since OpenPIC has only 4 IPIs, we use slightly different message numbers.
67 *
68 * Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up
69 * in /proc/interrupts will be wrong!!! --Troy */
70#define PPC_MSG_CALL_FUNCTION 0
71#define PPC_MSG_RESCHEDULE 1
72/* This is unused now */
73#if 0
74#define PPC_MSG_MIGRATE_TASK 2
75#endif
76#define PPC_MSG_DEBUGGER_BREAK 3
77
78void smp_init_iSeries(void);
79void smp_init_pSeries(void);
80void smp_init_cell(void);
81void smp_setup_cpu_maps(void);
82
83extern int __cpu_disable(void);
84extern void __cpu_die(unsigned int cpu);
85
86#else
87/* for UP */
88#define smp_setup_cpu_maps()
89#define smp_release_cpus()
90
91#endif /* CONFIG_SMP */
92
93#ifdef CONFIG_PPC64
94#define get_hard_smp_processor_id(CPU) (paca[(CPU)].hw_cpu_id)
95#define set_hard_smp_processor_id(CPU, VAL) \
96 do { (paca[(CPU)].hw_cpu_id = (VAL)); } while (0)
97#else
98/* 32-bit */
99#ifndef CONFIG_SMP
100#define get_hard_smp_processor_id(cpu) boot_cpuid_phys
101#define set_hard_smp_processor_id(cpu, phys)
102#endif
103#endif
104
105extern int smt_enabled_at_boot;
106
107extern int smp_mpic_probe(void);
108extern void smp_mpic_setup_cpu(int cpu);
109extern void smp_generic_kick_cpu(int nr);
110
111extern void smp_generic_give_timebase(void);
112extern void smp_generic_take_timebase(void);
113
114extern struct smp_ops_t *smp_ops;
115
116#endif /* __ASSEMBLY__ */
117
118#endif /* __KERNEL__ */
119#endif /* _ASM_POWERPC_SMP_H) */