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);
  36extern int cpu_to_chip_id(int cpu);
  37
  38#ifdef CONFIG_SMP
  39
  40struct smp_ops_t {
  41        void  (*message_pass)(int cpu, int msg);
  42#ifdef CONFIG_PPC_SMP_MUXED_IPI
  43        void  (*cause_ipi)(int cpu, unsigned long data);
  44#endif
  45        void  (*probe)(void);
  46        int   (*kick_cpu)(int nr);
  47        void  (*setup_cpu)(int nr);
  48        void  (*bringup_done)(void);
  49        void  (*take_timebase)(void);
  50        void  (*give_timebase)(void);
  51        int   (*cpu_disable)(void);
  52        void  (*cpu_die)(unsigned int nr);
  53        int   (*cpu_bootable)(unsigned int nr);
  54};
  55
  56extern void smp_send_debugger_break(void);
  57extern void start_secondary_resume(void);
  58extern void smp_generic_give_timebase(void);
  59extern void smp_generic_take_timebase(void);
  60
  61DECLARE_PER_CPU(unsigned int, cpu_pvr);
  62
  63#ifdef CONFIG_HOTPLUG_CPU
  64extern void migrate_irqs(void);
  65int generic_cpu_disable(void);
  66void generic_cpu_die(unsigned int cpu);
  67void generic_set_cpu_dead(unsigned int cpu);
  68void generic_set_cpu_up(unsigned int cpu);
  69int generic_check_cpu_restart(unsigned int cpu);
  70#endif
  71
  72#ifdef CONFIG_PPC64
  73#define raw_smp_processor_id()  (local_paca->paca_index)
  74#define hard_smp_processor_id() (get_paca()->hw_cpu_id)
  75#else
  76/* 32-bit */
  77extern int smp_hw_index[];
  78
  79#define raw_smp_processor_id()  (current_thread_info()->cpu)
  80#define hard_smp_processor_id()         (smp_hw_index[smp_processor_id()])
  81
  82static inline int get_hard_smp_processor_id(int cpu)
  83{
  84        return smp_hw_index[cpu];
  85}
  86
  87static inline void set_hard_smp_processor_id(int cpu, int phys)
  88{
  89        smp_hw_index[cpu] = phys;
  90}
  91#endif
  92
  93DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_map);
  94DECLARE_PER_CPU(cpumask_var_t, cpu_core_map);
  95
  96static inline struct cpumask *cpu_sibling_mask(int cpu)
  97{
  98        return per_cpu(cpu_sibling_map, cpu);
  99}
 100
 101static inline struct cpumask *cpu_core_mask(int cpu)
 102{
 103        return per_cpu(cpu_core_map, cpu);
 104}
 105
 106extern int cpu_to_core_id(int cpu);
 107
 108/* Since OpenPIC has only 4 IPIs, we use slightly different message numbers.
 109 *
 110 * Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up
 111 * in /proc/interrupts will be wrong!!! --Troy */
 112#define PPC_MSG_CALL_FUNCTION   0
 113#define PPC_MSG_RESCHEDULE      1
 114#define PPC_MSG_TICK_BROADCAST  2
 115#define PPC_MSG_DEBUGGER_BREAK  3
 116
 117/* for irq controllers that have dedicated ipis per message (4) */
 118extern int smp_request_message_ipi(int virq, int message);
 119extern const char *smp_ipi_name[];
 120
 121/* for irq controllers with only a single ipi */
 122extern void smp_muxed_ipi_set_data(int cpu, unsigned long data);
 123extern void smp_muxed_ipi_message_pass(int cpu, int msg);
 124extern irqreturn_t smp_ipi_demux(void);
 125
 126void smp_init_pSeries(void);
 127void smp_init_cell(void);
 128void smp_setup_cpu_maps(void);
 129
 130extern int __cpu_disable(void);
 131extern void __cpu_die(unsigned int cpu);
 132
 133#else
 134/* for UP */
 135#define hard_smp_processor_id()         get_hard_smp_processor_id(0)
 136#define smp_setup_cpu_maps()
 137static inline void inhibit_secondary_onlining(void) {}
 138static inline void uninhibit_secondary_onlining(void) {}
 139static inline const struct cpumask *cpu_sibling_mask(int cpu)
 140{
 141        return cpumask_of(cpu);
 142}
 143
 144#endif /* CONFIG_SMP */
 145
 146#ifdef CONFIG_PPC64
 147static inline int get_hard_smp_processor_id(int cpu)
 148{
 149        return paca[cpu].hw_cpu_id;
 150}
 151
 152static inline void set_hard_smp_processor_id(int cpu, int phys)
 153{
 154        paca[cpu].hw_cpu_id = phys;
 155}
 156
 157extern void smp_release_cpus(void);
 158
 159#else
 160/* 32-bit */
 161#ifndef CONFIG_SMP
 162extern int boot_cpuid_phys;
 163static inline int get_hard_smp_processor_id(int cpu)
 164{
 165        return boot_cpuid_phys;
 166}
 167
 168static inline void set_hard_smp_processor_id(int cpu, int phys)
 169{
 170        boot_cpuid_phys = phys;
 171}
 172#endif /* !CONFIG_SMP */
 173#endif /* !CONFIG_PPC64 */
 174
 175extern int smt_enabled_at_boot;
 176
 177extern void smp_mpic_probe(void);
 178extern void smp_mpic_setup_cpu(int cpu);
 179extern int smp_generic_kick_cpu(int nr);
 180extern int smp_generic_cpu_bootable(unsigned int nr);
 181
 182
 183extern void smp_generic_give_timebase(void);
 184extern void smp_generic_take_timebase(void);
 185
 186extern struct smp_ops_t *smp_ops;
 187
 188extern void arch_send_call_function_single_ipi(int cpu);
 189extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
 190
 191/* Definitions relative to the secondary CPU spin loop
 192 * and entry point. Not all of them exist on both 32 and
 193 * 64-bit but defining them all here doesn't harm
 194 */
 195extern void generic_secondary_smp_init(void);
 196extern void generic_secondary_thread_init(void);
 197extern unsigned long __secondary_hold_spinloop;
 198extern unsigned long __secondary_hold_acknowledge;
 199extern char __secondary_hold;
 200
 201extern void __early_start(void);
 202#endif /* __ASSEMBLY__ */
 203
 204#endif /* __KERNEL__ */
 205#endif /* _ASM_POWERPC_SMP_H) */
 206