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 #include <mach/smp.h>
  18
  19 #ifndef CONFIG_SMP
  20 # error "<asm/smp.h> included in non-SMP build"
  21 #endif
  22
  23 #define raw_smp_processor_id() (current_thread_info()->cpu)
  24
  25 /*
  26  * at the moment, there's not a big penalty for changing CPUs
  27  * (the >big< penalty is running SMP in the first place)
  28  */
  29 #define PROC_CHANGE_PENALTY             15
  30
  31 struct seq_file;
  32
  33 /*
  34  * generate IPI list text
  35  */
  36 extern void show_ipi_list(struct seq_file *p);
  37
  38 /*
  39  * Called from assembly code, this handles an IPI.
  40  */
  41 asmlinkage void do_IPI(struct pt_regs *regs);
  42
  43 /*
  44  * Setup the set of possible CPUs (via set_cpu_possible)
  45  */
  46 extern void smp_init_cpus(void);
  47
  48 /*
  49  * Move global data into per-processor storage.
  50  */
  51 extern void smp_store_cpu_info(unsigned int cpuid);
  52
  53 /*
  54  * Raise an IPI cross call on CPUs in callmap.
  55  */
  56 extern void smp_cross_call(const struct cpumask *mask);
  57
  58 /*
  59  * Boot a secondary CPU, and assign it the specified idle task.
  60  * This also gives us the initial stack to use for this CPU.
  61  */
  62 extern int boot_secondary(unsigned int cpu, struct task_struct *);
  63
  64 /*
  65  * Called from platform specific assembly code, this is the
  66  * secondary CPU entry point.
  67  */
  68 asmlinkage void secondary_start_kernel(void);
  69
  70 /*
  71  * Perform platform specific initialisation of the specified CPU.
  72  */
  73 extern void platform_secondary_init(unsigned int cpu);
  74
  75 /*
  76  * Initial data for bringing up a secondary CPU.
  77  */
  78 struct secondary_data {
  79         unsigned long pgdir;
  80         void *stack;
  81 };
  82 extern struct secondary_data secondary_data;
  83
  84 extern int __cpu_disable(void);
  85 extern int mach_cpu_disable(unsigned int cpu);
  86
  87 extern void __cpu_die(unsigned int cpu);
  88 extern void cpu_die(void);
  89
  90 extern void platform_cpu_die(unsigned int cpu);
  91 extern int platform_cpu_kill(unsigned int cpu);
  92 extern void platform_cpu_enable(unsigned int cpu);
  93
  94 extern void arch_send_call_function_single_ipi(int cpu);
  95 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
  96 #define arch_send_call_function_ipi_mask arch_send_call_function_ipi_mask
  97
  98 /*
  99  * show local interrupt info
 100  */
 101 extern void show_local_irqs(struct seq_file *);
 102
 103 #endif /* ifndef __ASM_ARM_SMP_H */