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 *, int);
  37
  38 /*
  39  * Called from assembly code, this handles an IPI.
  40  */
  41 asmlinkage void do_IPI(int ipinr, 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 /*
  50  * Raise an IPI cross call on CPUs in callmap.
  51  */
  52 extern void smp_cross_call(const struct cpumask *mask, int ipi);
  53
  54 /*
  55  * Boot a secondary CPU, and assign it the specified idle task.
  56  * This also gives us the initial stack to use for this CPU.
  57  */
  58 extern int boot_secondary(unsigned int cpu, struct task_struct *);
  59
  60 /*
  61  * Called from platform specific assembly code, this is the
  62  * secondary CPU entry point.
  63  */
  64 asmlinkage void secondary_start_kernel(void);
  65
  66 /*
  67  * Perform platform specific initialisation of the specified CPU.
  68  */
  69 extern void platform_secondary_init(unsigned int cpu);
  70
  71 /*
  72  * Initialize cpu_possible map, and enable coherency
  73  */
  74 extern void platform_smp_prepare_cpus(unsigned int);
  75
  76 /*
  77  * Initial data for bringing up a secondary CPU.
  78  */
  79 struct secondary_data {
  80         unsigned long pgdir;
  81         void *stack;
  82 };
  83 extern struct secondary_data secondary_data;
  84
  85 extern int __cpu_disable(void);
  86 extern int platform_cpu_disable(unsigned int cpu);
  87
  88 extern void __cpu_die(unsigned int cpu);
  89 extern void cpu_die(void);
  90
  91 extern void platform_cpu_die(unsigned int cpu);
  92 extern int platform_cpu_kill(unsigned int cpu);
  93 extern void platform_cpu_enable(unsigned int cpu);
  94
  95 extern void arch_send_call_function_single_ipi(int cpu);
  96 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
  97
  98 /*
  99  * show local interrupt info
 100  */
 101 extern void show_local_irqs(struct seq_file *, int);
 102
 103 #endif /* ifndef __ASM_ARM_SMP_H */