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Linux kernel mirror (for testing)
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linux
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/threads.h>
21#include <linux/cpumask.h>
22#include <linux/kernel.h>
23
24#ifndef __ASSEMBLY__
25
26#ifdef CONFIG_PPC64
27#include <asm/paca.h>
28#endif
29
30extern int boot_cpuid;
31
32extern void cpu_die(void);
33
34#ifdef CONFIG_SMP
35
36extern void smp_send_debugger_break(int cpu);
37extern void smp_message_recv(int);
38
39#ifdef CONFIG_HOTPLUG_CPU
40extern void fixup_irqs(cpumask_t map);
41int generic_cpu_disable(void);
42int generic_cpu_enable(unsigned int cpu);
43void generic_cpu_die(unsigned int cpu);
44void generic_mach_cpu_die(void);
45#endif
46
47#ifdef CONFIG_PPC64
48#define raw_smp_processor_id() (get_paca()->paca_index)
49#define hard_smp_processor_id() (get_paca()->hw_cpu_id)
50#else
51/* 32-bit */
52extern int smp_hw_index[];
53
54#define raw_smp_processor_id() (current_thread_info()->cpu)
55#define hard_smp_processor_id() (smp_hw_index[smp_processor_id()])
56#define get_hard_smp_processor_id(cpu) (smp_hw_index[(cpu)])
57#define set_hard_smp_processor_id(cpu, phys)\
58 (smp_hw_index[(cpu)] = (phys))
59#endif
60
61extern cpumask_t cpu_sibling_map[NR_CPUS];
62
63/* Since OpenPIC has only 4 IPIs, we use slightly different message numbers.
64 *
65 * Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up
66 * in /proc/interrupts will be wrong!!! --Troy */
67#define PPC_MSG_CALL_FUNCTION 0
68#define PPC_MSG_RESCHEDULE 1
69/* This is unused now */
70#if 0
71#define PPC_MSG_MIGRATE_TASK 2
72#endif
73#define PPC_MSG_DEBUGGER_BREAK 3
74
75void smp_init_iSeries(void);
76void smp_init_pSeries(void);
77void smp_init_cell(void);
78void smp_init_celleb(void);
79void smp_setup_cpu_maps(void);
80
81extern int __cpu_disable(void);
82extern void __cpu_die(unsigned int cpu);
83
84#else
85/* for UP */
86#define hard_smp_processor_id() 0
87#define smp_setup_cpu_maps()
88
89#endif /* CONFIG_SMP */
90
91#ifdef CONFIG_PPC64
92#define get_hard_smp_processor_id(CPU) (paca[(CPU)].hw_cpu_id)
93#define set_hard_smp_processor_id(CPU, VAL) \
94 do { (paca[(CPU)].hw_cpu_id = (VAL)); } while (0)
95
96extern void smp_release_cpus(void);
97
98#else
99/* 32-bit */
100#ifndef CONFIG_SMP
101extern int boot_cpuid_phys;
102#define get_hard_smp_processor_id(cpu) boot_cpuid_phys
103#define set_hard_smp_processor_id(cpu, phys)
104#endif
105#endif
106
107extern int smt_enabled_at_boot;
108
109extern int smp_mpic_probe(void);
110extern void smp_mpic_setup_cpu(int cpu);
111extern void smp_generic_kick_cpu(int nr);
112
113extern void smp_generic_give_timebase(void);
114extern void smp_generic_take_timebase(void);
115
116extern struct smp_ops_t *smp_ops;
117
118#endif /* __ASSEMBLY__ */
119
120#endif /* __KERNEL__ */
121#endif /* _ASM_POWERPC_SMP_H) */