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 smp_processor_id()      (current_thread_info()->cpu)
  25
  26 extern cpumask_t cpu_present_mask;
  27 #define cpu_possible_map cpu_present_mask
  28
  29 /*
  30  * at the moment, there's not a big penalty for changing CPUs
  31  * (the >big< penalty is running SMP in the first place)
  32  */
  33 #define PROC_CHANGE_PENALTY             15
  34
  35 struct seq_file;
  36
  37 /*
  38  * generate IPI list text
  39  */
  40 extern void show_ipi_list(struct seq_file *p);
  41
  42 /*
  43  * Move global data into per-processor storage.
  44  */
  45 extern void smp_store_cpu_info(unsigned int cpuid);
  46
  47 /*
  48  * Raise an IPI cross call on CPUs in callmap.
  49  */
  50 extern void smp_cross_call(cpumask_t callmap);
  51
  52 /*
  53  * Boot a secondary CPU, and assign it the specified idle task.
  54  * This also gives us the initial stack to use for this CPU.
  55  */
  56 extern int boot_secondary(unsigned int cpu, struct task_struct *);
  57
  58 /*
  59  * Perform platform specific initialisation of the specified CPU.
  60  */
  61 extern void platform_secondary_init(unsigned int cpu);
  62
  63 /*
  64  * Initial data for bringing up a secondary CPU.
  65  */
  66 struct secondary_data {
  67         unsigned long pgdir;
  68         void *stack;
  69 };
  70 extern struct secondary_data secondary_data;
  71
  72 #endif /* ifndef __ASM_ARM_SMP_H */