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