LXR linux/arch/powerpc/include/asm/smp.h

   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#include <linux/irqreturn.h>
  24
  25#ifndef __ASSEMBLY__
  26
  27#ifdef CONFIG_PPC64
  28#include <asm/paca.h>
  29#endif
  30#include <asm/percpu.h>
  31
  32extern int boot_cpuid;
  33extern int spinning_secondaries;
  34
  35extern void cpu_die(void);
  36
  37#ifdef CONFIG_SMP
  38
  39struct smp_ops_t {
  40        void  (*message_pass)(int cpu, int msg);
  41#ifdef CONFIG_PPC_SMP_MUXED_IPI
  42        void  (*cause_ipi)(int cpu, unsigned long data);
  43#endif
  44        int   (*probe)(void);
  45        int   (*kick_cpu)(int nr);
  46        void  (*setup_cpu)(int nr);
  47        void  (*bringup_done)(void);
  48        void  (*take_timebase)(void);
  49        void  (*give_timebase)(void);
  50        int   (*cpu_disable)(void);
  51        void  (*cpu_die)(unsigned int nr);
  52        int   (*cpu_bootable)(unsigned int nr);
  53};
  54
  55extern void smp_send_debugger_break(void);
  56extern void start_secondary_resume(void);
  57extern void __devinit smp_generic_give_timebase(void);
  58extern void __devinit smp_generic_take_timebase(void);
  59
  60DECLARE_PER_CPU(unsigned int, cpu_pvr);
  61
  62#ifdef CONFIG_HOTPLUG_CPU
  63extern void migrate_irqs(void);
  64int generic_cpu_disable(void);
  65void generic_cpu_die(unsigned int cpu);
  66void generic_mach_cpu_die(void);
  67void generic_set_cpu_dead(unsigned int cpu);
  68int generic_check_cpu_restart(unsigned int cpu);
  69#endif
  70
  71#ifdef CONFIG_PPC64
  72#define raw_smp_processor_id()  (local_paca->paca_index)
  73#define hard_smp_processor_id() (get_paca()->hw_cpu_id)
  74#else
  75/* 32-bit */
  76extern int smp_hw_index[];
  77
  78#define raw_smp_processor_id()  (current_thread_info()->cpu)
  79#define hard_smp_processor_id()         (smp_hw_index[smp_processor_id()])
  80
  81static inline int get_hard_smp_processor_id(int cpu)
  82{
  83        return smp_hw_index[cpu];
  84}
  85
  86static inline void set_hard_smp_processor_id(int cpu, int phys)
  87{
  88        smp_hw_index[cpu] = phys;
  89}
  90#endif
  91
  92DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_map);
  93DECLARE_PER_CPU(cpumask_var_t, cpu_core_map);
  94
  95static inline struct cpumask *cpu_sibling_mask(int cpu)
  96{
  97        return per_cpu(cpu_sibling_map, cpu);
  98}
  99
 100static inline struct cpumask *cpu_core_mask(int cpu)
 101{
 102        return per_cpu(cpu_core_map, cpu);
 103}
 104
 105extern int cpu_to_core_id(int cpu);
 106
 107/* Since OpenPIC has only 4 IPIs, we use slightly different message numbers.
 108 *
 109 * Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up
 110 * in /proc/interrupts will be wrong!!! --Troy */
 111#define PPC_MSG_CALL_FUNCTION   0
 112#define PPC_MSG_RESCHEDULE      1
 113#define PPC_MSG_CALL_FUNC_SINGLE        2
 114#define PPC_MSG_DEBUGGER_BREAK  3
 115
 116/* for irq controllers that have dedicated ipis per message (4) */
 117extern int smp_request_message_ipi(int virq, int message);
 118extern const char *smp_ipi_name[];
 119
 120/* for irq controllers with only a single ipi */
 121extern void smp_muxed_ipi_set_data(int cpu, unsigned long data);
 122extern void smp_muxed_ipi_message_pass(int cpu, int msg);
 123extern irqreturn_t smp_ipi_demux(void);
 124
 125void smp_init_iSeries(void);
 126void smp_init_pSeries(void);
 127void smp_init_cell(void);
 128void smp_init_celleb(void);
 129void smp_setup_cpu_maps(void);
 130
 131extern int __cpu_disable(void);
 132extern void __cpu_die(unsigned int cpu);
 133
 134#else
 135/* for UP */
 136#define hard_smp_processor_id()         get_hard_smp_processor_id(0)
 137#define smp_setup_cpu_maps()
 138
 139#endif /* CONFIG_SMP */
 140
 141#ifdef CONFIG_PPC64
 142static inline int get_hard_smp_processor_id(int cpu)
 143{
 144        return paca[cpu].hw_cpu_id;
 145}
 146
 147static inline void set_hard_smp_processor_id(int cpu, int phys)
 148{
 149        paca[cpu].hw_cpu_id = phys;
 150}
 151
 152extern void smp_release_cpus(void);
 153
 154#else
 155/* 32-bit */
 156#ifndef CONFIG_SMP
 157extern int boot_cpuid_phys;
 158static inline int get_hard_smp_processor_id(int cpu)
 159{
 160        return boot_cpuid_phys;
 161}
 162
 163static inline void set_hard_smp_processor_id(int cpu, int phys)
 164{
 165        boot_cpuid_phys = phys;
 166}
 167#endif /* !CONFIG_SMP */
 168#endif /* !CONFIG_PPC64 */
 169
 170extern int smt_enabled_at_boot;
 171
 172extern int smp_mpic_probe(void);
 173extern void smp_mpic_setup_cpu(int cpu);
 174extern int smp_generic_kick_cpu(int nr);
 175
 176extern void smp_generic_give_timebase(void);
 177extern void smp_generic_take_timebase(void);
 178
 179extern struct smp_ops_t *smp_ops;
 180
 181extern void arch_send_call_function_single_ipi(int cpu);
 182extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
 183
 184/* Definitions relative to the secondary CPU spin loop
 185 * and entry point. Not all of them exist on both 32 and
 186 * 64-bit but defining them all here doesn't harm
 187 */
 188extern void generic_secondary_smp_init(void);
 189extern void generic_secondary_thread_init(void);
 190extern unsigned long __secondary_hold_spinloop;
 191extern unsigned long __secondary_hold_acknowledge;
 192extern char __secondary_hold;
 193
 194#endif /* __ASSEMBLY__ */
 195
 196#endif /* __KERNEL__ */
 197#endif /* _ASM_POWERPC_SMP_H) */
 198