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