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

   1/*
   2 * This file is subject to the terms and conditions of the GNU General
   3 * Public License.  See the file "COPYING" in the main directory of this
   4 * archive for more details.
   5 *
   6 * Copyright (C) 2000 - 2001 by Kanoj Sarcar (kanoj@sgi.com)
   7 * Copyright (C) 2000 - 2001 by Silicon Graphics, Inc.
   8 * Copyright (C) 2000, 2001, 2002 Ralf Baechle
   9 * Copyright (C) 2000, 2001 Broadcom Corporation
  10 */
  11#ifndef __ASM_SMP_H
  12#define __ASM_SMP_H
  13
  14#include <linux/bitops.h>
  15#include <linux/linkage.h>
  16#include <linux/smp.h>
  17#include <linux/threads.h>
  18#include <linux/cpumask.h>
  19
  20#include <asm/atomic.h>
  21#include <asm/smp-ops.h>
  22
  23extern int smp_num_siblings;
  24extern cpumask_t cpu_sibling_map[];
  25
  26#define raw_smp_processor_id() (current_thread_info()->cpu)
  27
  28/* Map from cpu id to sequential logical cpu number.  This will only
  29   not be idempotent when cpus failed to come on-line.  */
  30extern int __cpu_number_map[NR_CPUS];
  31#define cpu_number_map(cpu)  __cpu_number_map[cpu]
  32
  33/* The reverse map from sequential logical cpu number to cpu id.  */
  34extern int __cpu_logical_map[NR_CPUS];
  35#define cpu_logical_map(cpu)  __cpu_logical_map[cpu]
  36
  37#define NO_PROC_ID      (-1)
  38
  39#define SMP_RESCHEDULE_YOURSELF 0x1     /* XXX braindead */
  40#define SMP_CALL_FUNCTION       0x2
  41/* Octeon - Tell another core to flush its icache */
  42#define SMP_ICACHE_FLUSH        0x4
  43
  44extern volatile cpumask_t cpu_callin_map;
  45
  46extern void asmlinkage smp_bootstrap(void);
  47
  48/*
  49 * this function sends a 'reschedule' IPI to another CPU.
  50 * it goes straight through and wastes no time serializing
  51 * anything. Worst case is that we lose a reschedule ...
  52 */
  53static inline void smp_send_reschedule(int cpu)
  54{
  55        extern struct plat_smp_ops *mp_ops;     /* private */
  56
  57        mp_ops->send_ipi_single(cpu, SMP_RESCHEDULE_YOURSELF);
  58}
  59
  60#ifdef CONFIG_HOTPLUG_CPU
  61static inline int __cpu_disable(void)
  62{
  63        extern struct plat_smp_ops *mp_ops;     /* private */
  64
  65        return mp_ops->cpu_disable();
  66}
  67
  68static inline void __cpu_die(unsigned int cpu)
  69{
  70        extern struct plat_smp_ops *mp_ops;     /* private */
  71
  72        mp_ops->cpu_die(cpu);
  73}
  74
  75extern void play_dead(void);
  76#endif
  77
  78extern asmlinkage void smp_call_function_interrupt(void);
  79
  80static inline void arch_send_call_function_single_ipi(int cpu)
  81{
  82        extern struct plat_smp_ops *mp_ops;     /* private */
  83
  84        mp_ops->send_ipi_mask(&cpumask_of_cpu(cpu), SMP_CALL_FUNCTION);
  85}
  86
  87static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
  88{
  89        extern struct plat_smp_ops *mp_ops;     /* private */
  90
  91        mp_ops->send_ipi_mask(mask, SMP_CALL_FUNCTION);
  92}
  93
  94#endif /* __ASM_SMP_H */
  95