include/asm-arm/smp.h

   1 /*
   2  *  linux/include/asm-arm/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/config.h>
  14 #include <linux/threads.h>
  15 #include <linux/cpumask.h>
  16 #include <linux/thread_info.h>
  17
  18 #include <asm/arch/smp.h>
  19
  20 #ifndef CONFIG_SMP
  21 # error "<asm-arm/smp.h> included in non-SMP build"
  22 #endif
  23
  24 #define raw_smp_processor_id() (current_thread_info()->cpu)
  25
  26 /*
  27  * at the moment, there's not a big penalty for changing CPUs
  28  * (the >big< penalty is running SMP in the first place)
  29  */
  30 #define PROC_CHANGE_PENALTY             15
  31
  32 struct seq_file;
  33
  34 /*
  35  * generate IPI list text
  36  */
  37 extern void show_ipi_list(struct seq_file *p);
  38
  39 /*
  40  * Move global data into per-processor storage.
  41  */
  42 extern void smp_store_cpu_info(unsigned int cpuid);
  43
  44 /*
  45  * Raise an IPI cross call on CPUs in callmap.
  46  */
  47 extern void smp_cross_call(cpumask_t callmap);
  48
  49 /*
  50  * Boot a secondary CPU, and assign it the specified idle task.
  51  * This also gives us the initial stack to use for this CPU.
  52  */
  53 extern int boot_secondary(unsigned int cpu, struct task_struct *);
  54
  55 /*
  56  * Perform platform specific initialisation of the specified CPU.
  57  */
  58 extern void platform_secondary_init(unsigned int cpu);
  59
  60 /*
  61  * Initial data for bringing up a secondary CPU.
  62  */
  63 struct secondary_data {
  64         unsigned long pgdir;
  65         void *stack;
  66 };
  67 extern struct secondary_data secondary_data;
  68
  69 #endif /* ifndef __ASM_ARM_SMP_H */