LXR linux/arch/mips/include/asm/smp-ops.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_OPS_H
  12#define __ASM_SMP_OPS_H
  13
  14#include <linux/errno.h>
  15
  16#include <asm/mips-cm.h>
  17
  18#ifdef CONFIG_SMP
  19
  20#include <linux/cpumask.h>
  21
  22struct task_struct;
  23
  24struct plat_smp_ops {
  25        void (*send_ipi_single)(int cpu, unsigned int action);
  26        void (*send_ipi_mask)(const struct cpumask *mask, unsigned int action);
  27        void (*init_secondary)(void);
  28        void (*smp_finish)(void);
  29        void (*boot_secondary)(int cpu, struct task_struct *idle);
  30        void (*smp_setup)(void);
  31        void (*prepare_cpus)(unsigned int max_cpus);
  32#ifdef CONFIG_HOTPLUG_CPU
  33        int (*cpu_disable)(void);
  34        void (*cpu_die)(unsigned int cpu);
  35#endif
  36};
  37
  38extern void register_smp_ops(struct plat_smp_ops *ops);
  39
  40static inline void plat_smp_setup(void)
  41{
  42        extern struct plat_smp_ops *mp_ops;     /* private */
  43
  44        mp_ops->smp_setup();
  45}
  46
  47extern void gic_send_ipi_single(int cpu, unsigned int action);
  48extern void gic_send_ipi_mask(const struct cpumask *mask, unsigned int action);
  49
  50#else /* !CONFIG_SMP */
  51
  52struct plat_smp_ops;
  53
  54static inline void plat_smp_setup(void)
  55{
  56        /* UP, nothing to do ...  */
  57}
  58
  59static inline void register_smp_ops(struct plat_smp_ops *ops)
  60{
  61}
  62
  63#endif /* !CONFIG_SMP */
  64
  65static inline int register_up_smp_ops(void)
  66{
  67#ifdef CONFIG_SMP_UP
  68        extern struct plat_smp_ops up_smp_ops;
  69
  70        register_smp_ops(&up_smp_ops);
  71
  72        return 0;
  73#else
  74        return -ENODEV;
  75#endif
  76}
  77
  78static inline int register_cmp_smp_ops(void)
  79{
  80#ifdef CONFIG_MIPS_CMP
  81        extern struct plat_smp_ops cmp_smp_ops;
  82
  83        if (!mips_cm_present())
  84                return -ENODEV;
  85
  86        register_smp_ops(&cmp_smp_ops);
  87
  88        return 0;
  89#else
  90        return -ENODEV;
  91#endif
  92}
  93
  94static inline int register_vsmp_smp_ops(void)
  95{
  96#ifdef CONFIG_MIPS_MT_SMP
  97        extern struct plat_smp_ops vsmp_smp_ops;
  98
  99        register_smp_ops(&vsmp_smp_ops);
 100
 101        return 0;
 102#else
 103        return -ENODEV;
 104#endif
 105}
 106
 107#ifdef CONFIG_MIPS_CPS
 108extern int register_cps_smp_ops(void);
 109#else
 110static inline int register_cps_smp_ops(void)
 111{
 112        return -ENODEV;
 113}
 114#endif
 115
 116#endif /* __ASM_SMP_OPS_H */
 117