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[];
  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/* Used by kexec crashdump to save all cpu's state */
  44#define SMP_DUMP                0x8
  45#define SMP_ASK_C0COUNT         0x10
  46
  47extern volatile cpumask_t cpu_callin_map;
  48
  49/* Mask of CPUs which are currently definitely operating coherently */
  50extern cpumask_t cpu_coherent_mask;
  51
  52extern void asmlinkage smp_bootstrap(void);
  53
  54/*
  55 * this function sends a 'reschedule' IPI to another CPU.
  56 * it goes straight through and wastes no time serializing
  57 * anything. Worst case is that we lose a reschedule ...
  58 */
  59static inline void smp_send_reschedule(int cpu)
  60{
  61        extern struct plat_smp_ops *mp_ops;     /* private */
  62
  63        mp_ops->send_ipi_single(cpu, SMP_RESCHEDULE_YOURSELF);
  64}
  65
  66#ifdef CONFIG_HOTPLUG_CPU
  67static inline int __cpu_disable(void)
  68{
  69        extern struct plat_smp_ops *mp_ops;     /* private */
  70
  71        return mp_ops->cpu_disable();
  72}
  73
  74static inline void __cpu_die(unsigned int cpu)
  75{
  76        extern struct plat_smp_ops *mp_ops;     /* private */
  77
  78        mp_ops->cpu_die(cpu);
  79}
  80
  81extern void play_dead(void);
  82#endif
  83
  84extern asmlinkage void smp_call_function_interrupt(void);
  85
  86static inline void arch_send_call_function_single_ipi(int cpu)
  87{
  88        extern struct plat_smp_ops *mp_ops;     /* private */
  89
  90        mp_ops->send_ipi_mask(&cpumask_of_cpu(cpu), SMP_CALL_FUNCTION);
  91}
  92
  93static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
  94{
  95        extern struct plat_smp_ops *mp_ops;     /* private */
  96
  97        mp_ops->send_ipi_mask(mask, SMP_CALL_FUNCTION);
  98}
  99
 100#if defined(CONFIG_KEXEC)
 101extern void (*dump_ipi_function_ptr)(void *);
 102void dump_send_ipi(void (*dump_ipi_callback)(void *));
 103#endif
 104#endif /* __ASM_SMP_H */
 105