arch/arm/include/asm/smp.h

   1 /*
   2  *  arch/arm/include/asm/smp.h
   3  *
   4  *  Copyright (C) 2004-2005 ARM Ltd.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10 #ifndef __ASM_ARM_SMP_H
  11 #define __ASM_ARM_SMP_H
  12
  13 #include <linux/threads.h>
  14 #include <linux/cpumask.h>
  15 #include <linux/thread_info.h>
  16
  17 #ifndef CONFIG_SMP
  18 # error "<asm/smp.h> included in non-SMP build"
  19 #endif
  20
  21 #define raw_smp_processor_id() (current_thread_info()->cpu)
  22
  23 struct seq_file;
  24
  25 /*
  26  * generate IPI list text
  27  */
  28 extern void show_ipi_list(struct seq_file *, int);
  29
  30 /*
  31  * Called from assembly code, this handles an IPI.
  32  */
  33 asmlinkage void do_IPI(int ipinr, struct pt_regs *regs);
  34
  35 /*
  36  * Called from C code, this handles an IPI.
  37  */
  38 void handle_IPI(int ipinr, struct pt_regs *regs);
  39
  40 /*
  41  * Setup the set of possible CPUs (via set_cpu_possible)
  42  */
  43 extern void smp_init_cpus(void);
  44
  45
  46 /*
  47  * Provide a function to raise an IPI cross call on CPUs in callmap.
  48  */
  49 extern void set_smp_cross_call(void (*)(const struct cpumask *, unsigned int));
  50
  51 /*
  52  * Boot a secondary CPU, and assign it the specified idle task.
  53  * This also gives us the initial stack to use for this CPU.
  54  */
  55 extern int boot_secondary(unsigned int cpu, struct task_struct *);
  56
  57 /*
  58  * Called from platform specific assembly code, this is the
  59  * secondary CPU entry point.
  60  */
  61 asmlinkage void secondary_start_kernel(void);
  62
  63
  64 /*
  65  * Initial data for bringing up a secondary CPU.
  66  */
  67 struct secondary_data {
  68         unsigned long pgdir;
  69         unsigned long swapper_pg_dir;
  70         void *stack;
  71 };
  72 extern struct secondary_data secondary_data;
  73 extern volatile int pen_release;
  74
  75 extern int __cpu_disable(void);
  76
  77 extern void __cpu_die(unsigned int cpu);
  78 extern void cpu_die(void);
  79
  80 extern void arch_send_call_function_single_ipi(int cpu);
  81 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
  82 extern void arch_send_wakeup_ipi_mask(const struct cpumask *mask);
  83
  84 extern void smp_send_all_cpu_backtrace(void);
  85
  86 struct smp_operations {
  87 #ifdef CONFIG_SMP
  88         /*
  89          * Setup the set of possible CPUs (via set_cpu_possible)
  90          */
  91         void (*smp_init_cpus)(void);
  92         /*
  93          * Initialize cpu_possible map, and enable coherency
  94          */
  95         void (*smp_prepare_cpus)(unsigned int max_cpus);
  96
  97         /*
  98          * Perform platform specific initialisation of the specified CPU.
  99          */
 100         void (*smp_secondary_init)(unsigned int cpu);
 101         /*
 102          * Boot a secondary CPU, and assign it the specified idle task.
 103          * This also gives us the initial stack to use for this CPU.
 104          */
 105         int  (*smp_boot_secondary)(unsigned int cpu, struct task_struct *idle);
 106 #ifdef CONFIG_HOTPLUG_CPU
 107         int  (*cpu_kill)(unsigned int cpu);
 108         void (*cpu_die)(unsigned int cpu);
 109         int  (*cpu_disable)(unsigned int cpu);
 110 #endif
 111 #endif
 112 };
 113
 114 /*
 115  * set platform specific SMP operations
 116  */
 117 extern void smp_set_ops(struct smp_operations *);
 118
 119 #endif /* ifndef __ASM_ARM_SMP_H */