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 <linux/atomic.h>
  21#include <asm/smp-ops.h>
  22
  23extern int smp_num_siblings;
  24extern cpumask_t cpu_sibling_map[];
  25extern cpumask_t cpu_core_map[];
  26
  27#define raw_smp_processor_id() (current_thread_info()->cpu)
  28
  29/* Map from cpu id to sequential logical cpu number.  This will only
  30   not be idempotent when cpus failed to come on-line.  */
  31extern int __cpu_number_map[NR_CPUS];
  32#define cpu_number_map(cpu)  __cpu_number_map[cpu]
  33
  34/* The reverse map from sequential logical cpu number to cpu id.  */
  35extern int __cpu_logical_map[NR_CPUS];
  36#define cpu_logical_map(cpu)  __cpu_logical_map[cpu]
  37
  38#define NO_PROC_ID      (-1)
  39
  40#define SMP_RESCHEDULE_YOURSELF 0x1     /* XXX braindead */
  41#define SMP_CALL_FUNCTION       0x2
  42/* Octeon - Tell another core to flush its icache */
  43#define SMP_ICACHE_FLUSH        0x4
  44/* Used by kexec crashdump to save all cpu's state */
  45#define SMP_DUMP                0x8
  46#define SMP_ASK_C0COUNT         0x10
  47
  48extern volatile cpumask_t cpu_callin_map;
  49
  50/* Mask of CPUs which are currently definitely operating coherently */
  51extern cpumask_t cpu_coherent_mask;
  52
  53extern void asmlinkage smp_bootstrap(void);
  54
  55/*
  56 * this function sends a 'reschedule' IPI to another CPU.
  57 * it goes straight through and wastes no time serializing
  58 * anything. Worst case is that we lose a reschedule ...
  59 */
  60static inline void smp_send_reschedule(int cpu)
  61{
  62        extern struct plat_smp_ops *mp_ops;     /* private */
  63
  64        mp_ops->send_ipi_single(cpu, SMP_RESCHEDULE_YOURSELF);
  65}
  66
  67#ifdef CONFIG_HOTPLUG_CPU
  68static inline int __cpu_disable(void)
  69{
  70        extern struct plat_smp_ops *mp_ops;     /* private */
  71
  72        return mp_ops->cpu_disable();
  73}
  74
  75static inline void __cpu_die(unsigned int cpu)
  76{
  77        extern struct plat_smp_ops *mp_ops;     /* private */
  78
  79        mp_ops->cpu_die(cpu);
  80}
  81
  82extern void play_dead(void);
  83#endif
  84
  85extern asmlinkage void smp_call_function_interrupt(void);
  86
  87static inline void arch_send_call_function_single_ipi(int cpu)
  88{
  89        extern struct plat_smp_ops *mp_ops;     /* private */
  90
  91        mp_ops->send_ipi_mask(&cpumask_of_cpu(cpu), SMP_CALL_FUNCTION);
  92}
  93
  94static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
  95{
  96        extern struct plat_smp_ops *mp_ops;     /* private */
  97
  98        mp_ops->send_ipi_mask(mask, SMP_CALL_FUNCTION);
  99}
 100
 101#if defined(CONFIG_KEXEC)
 102extern void (*dump_ipi_function_ptr)(void *);
 103void dump_send_ipi(void (*dump_ipi_callback)(void *));
 104#endif
 105#endif /* __ASM_SMP_H */
 106