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
  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
  40DECLARE_PER_CPU(unsigned int, pvr);
  41
  42#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
  50#ifdef CONFIG_PPC64
  51#define raw_smp_processor_id()  (local_paca->paca_index)
  52#define hard_smp_processor_id() (get_paca()->hw_cpu_id)
  53#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()])
  59
  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}
  69#endif
  70
  71DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
  72DECLARE_PER_CPU(cpumask_t, cpu_core_map);
  73extern int cpu_to_core_id(int cpu);
  74
  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
  81#define PPC_MSG_CALL_FUNC_SINGLE        2
  82#define PPC_MSG_DEBUGGER_BREAK  3
  83
  84/*
  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
  91void smp_init_iSeries(void);
  92void smp_init_pSeries(void);
  93void smp_init_cell(void);
  94void smp_init_celleb(void);
  95void smp_setup_cpu_maps(void);
  96void smp_setup_cpu_sibling_map(void);
  97
  98extern int __cpu_disable(void);
  99extern void __cpu_die(unsigned int cpu);
 100
 101#else
 102/* for UP */
 103#define hard_smp_processor_id()         get_hard_smp_processor_id(0)
 104#define smp_setup_cpu_maps()
 105
 106#endif /* CONFIG_SMP */
 107
 108#ifdef CONFIG_PPC64
 109static 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}
 118
 119extern void smp_release_cpus(void);
 120
 121#else
 122/* 32-bit */
 123#ifndef CONFIG_SMP
 124extern int boot_cpuid_phys;
 125static 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{
 132        boot_cpuid_phys = phys;
 133}
 134#endif /* !CONFIG_SMP */
 135#endif /* !CONFIG_PPC64 */
 136
 137extern int smt_enabled_at_boot;
 138
 139extern int smp_mpic_probe(void);
 140extern void smp_mpic_setup_cpu(int cpu);
 141extern 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
 148extern void arch_send_call_function_single_ipi(int cpu);
 149extern void arch_send_call_function_ipi(cpumask_t mask);
 150
 151#endif /* __ASSEMBLY__ */
 152
 153#endif /* __KERNEL__ */
 154#endif /* _ASM_POWERPC_SMP_H) */
 155