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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Paul Mackerras5ad57072005-11-05 10:33:55 +11002 * smp.h: PowerPC-specific SMP code.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
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
Paul Mackerras5ad57072005-11-05 10:33:55 +110016#ifndef _ASM_POWERPC_SMP_H
17#define _ASM_POWERPC_SMP_H
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#ifdef __KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -070019
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include <linux/threads.h>
21#include <linux/cpumask.h>
22#include <linux/kernel.h>
23
24#ifndef __ASSEMBLY__
25
Paul Mackerras5ad57072005-11-05 10:33:55 +110026#ifdef CONFIG_PPC64
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include <asm/paca.h>
Paul Mackerras5ad57072005-11-05 10:33:55 +110028#endif
Mike Travisd5a74302007-10-16 01:24:05 -070029#include <asm/percpu.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070030
31extern int boot_cpuid;
Linus Torvalds1da177e2005-04-16 15:20:36 -070032
33extern void cpu_die(void);
34
35#ifdef CONFIG_SMP
36
37extern void smp_send_debugger_break(int cpu);
David Howells7d12e782006-10-05 14:55:46 +010038extern void smp_message_recv(int);
Linus Torvalds1da177e2005-04-16 15:20:36 -070039
Tejun Heo6b7487f2009-10-29 22:34:14 +090040DECLARE_PER_CPU(unsigned int, cpu_pvr);
Michael Ellerman1c21a292008-05-08 14:27:19 +100041
Linus Torvalds1da177e2005-04-16 15:20:36 -070042#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
Paul Mackerras5ad57072005-11-05 10:33:55 +110050#ifdef CONFIG_PPC64
Hugh Dickins048c8bc2006-11-01 05:44:54 +110051#define raw_smp_processor_id() (local_paca->paca_index)
Linus Torvalds1da177e2005-04-16 15:20:36 -070052#define hard_smp_processor_id() (get_paca()->hw_cpu_id)
Paul Mackerras5ad57072005-11-05 10:33:55 +110053#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()])
Benjamin Herrenschmidt41eba0a2008-08-18 14:23:48 +100059
60static inline int get_hard_smp_processor_id(int cpu)
61{
62 return smp_hw_index[cpu];
63}
64
65static inline void set_hard_smp_processor_id(int cpu, int phys)
66{
67 smp_hw_index[cpu] = phys;
68}
Paul Mackerras5ad57072005-11-05 10:33:55 +110069#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
Mike Travisd5a74302007-10-16 01:24:05 -070071DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
Nathan Lynch440a0852008-07-27 15:24:53 +100072DECLARE_PER_CPU(cpumask_t, cpu_core_map);
Nathan Lynche9efed32008-07-27 15:24:54 +100073extern int cpu_to_core_id(int cpu);
Linus Torvalds1da177e2005-04-16 15:20:36 -070074
75/* Since OpenPIC has only 4 IPIs, we use slightly different message numbers.
76 *
77 * Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up
78 * in /proc/interrupts will be wrong!!! --Troy */
79#define PPC_MSG_CALL_FUNCTION 0
80#define PPC_MSG_RESCHEDULE 1
Jens Axboeb7d7a242008-06-26 11:22:13 +020081#define PPC_MSG_CALL_FUNC_SINGLE 2
Linus Torvalds1da177e2005-04-16 15:20:36 -070082#define PPC_MSG_DEBUGGER_BREAK 3
83
Milton Miller25ddd732008-11-14 20:11:49 +000084/*
85 * irq controllers that have dedicated ipis per message and don't
86 * need additional code in the action handler may use this
87 */
88extern int smp_request_message_ipi(int virq, int message);
89extern const char *smp_ipi_name[];
90
Linus Torvalds1da177e2005-04-16 15:20:36 -070091void smp_init_iSeries(void);
92void smp_init_pSeries(void);
Arnd Bergmann19fe0472005-10-31 20:08:38 -050093void smp_init_cell(void);
Ishizaki Kouc347b792007-02-02 16:47:17 +090094void smp_init_celleb(void);
Paul Mackerras5ad57072005-11-05 10:33:55 +110095void smp_setup_cpu_maps(void);
Mike Travisd5a74302007-10-16 01:24:05 -070096void smp_setup_cpu_sibling_map(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -070097
98extern int __cpu_disable(void);
99extern void __cpu_die(unsigned int cpu);
Paul Mackerras5ad57072005-11-05 10:33:55 +1100100
101#else
102/* for UP */
Kumar Gala78b5b622008-10-10 09:44:33 +0000103#define hard_smp_processor_id() get_hard_smp_processor_id(0)
Paul Mackerras5ad57072005-11-05 10:33:55 +1100104#define smp_setup_cpu_maps()
Paul Mackerras5ad57072005-11-05 10:33:55 +1100105
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106#endif /* CONFIG_SMP */
107
Paul Mackerras5ad57072005-11-05 10:33:55 +1100108#ifdef CONFIG_PPC64
Benjamin Herrenschmidt41eba0a2008-08-18 14:23:48 +1000109static inline int get_hard_smp_processor_id(int cpu)
110{
111 return paca[cpu].hw_cpu_id;
112}
113
114static inline void set_hard_smp_processor_id(int cpu, int phys)
115{
116 paca[cpu].hw_cpu_id = phys;
117}
Paul Mackerras2249ca92005-11-07 13:18:13 +1100118
119extern void smp_release_cpus(void);
120
Paul Mackerras5ad57072005-11-05 10:33:55 +1100121#else
122/* 32-bit */
123#ifndef CONFIG_SMP
Anton Blanchard4df20462006-03-25 17:25:17 +1100124extern int boot_cpuid_phys;
Benjamin Herrenschmidt41eba0a2008-08-18 14:23:48 +1000125static inline int get_hard_smp_processor_id(int cpu)
126{
127 return boot_cpuid_phys;
128}
129
130static inline void set_hard_smp_processor_id(int cpu, int phys)
131{
Kumar Gala78b5b622008-10-10 09:44:33 +0000132 boot_cpuid_phys = phys;
Benjamin Herrenschmidt41eba0a2008-08-18 14:23:48 +1000133}
134#endif /* !CONFIG_SMP */
135#endif /* !CONFIG_PPC64 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136
137extern int smt_enabled_at_boot;
138
139extern int smp_mpic_probe(void);
140extern void smp_mpic_setup_cpu(int cpu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141extern void smp_generic_kick_cpu(int nr);
142
143extern void smp_generic_give_timebase(void);
144extern void smp_generic_take_timebase(void);
145
146extern struct smp_ops_t *smp_ops;
147
Jens Axboeb7d7a242008-06-26 11:22:13 +0200148extern void arch_send_call_function_single_ipi(int cpu);
Rusty Russellf063ea02009-09-24 09:34:45 -0600149extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
Jens Axboeb7d7a242008-06-26 11:22:13 +0200150
Benjamin Herrenschmidtcf54dc72009-07-23 23:15:28 +0000151/* Definitions relative to the secondary CPU spin loop
152 * and entry point. Not all of them exist on both 32 and
153 * 64-bit but defining them all here doesn't harm
154 */
155extern void generic_secondary_smp_init(void);
Benjamin Herrenschmidt2d27cfd2009-07-23 23:15:59 +0000156extern void generic_secondary_thread_init(void);
Benjamin Herrenschmidtcf54dc72009-07-23 23:15:28 +0000157extern unsigned long __secondary_hold_spinloop;
158extern unsigned long __secondary_hold_acknowledge;
159extern char __secondary_hold;
160
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161#endif /* __ASSEMBLY__ */
162
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163#endif /* __KERNEL__ */
Paul Mackerras5ad57072005-11-05 10:33:55 +1100164#endif /* _ASM_POWERPC_SMP_H) */