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  * Perform platform specific initialisation of the specified CPU.
  65  */
  66 extern void platform_secondary_init(unsigned int cpu);
  67
  68 /*
  69  * Initialize cpu_possible map, and enable coherency
  70  */
  71 extern void platform_smp_prepare_cpus(unsigned int);
  72
  73 /*
  74  * Initial data for bringing up a secondary CPU.
  75  */
  76 struct secondary_data {
  77         unsigned long pgdir;
  78         unsigned long swapper_pg_dir;
  79         void *stack;
  80 };
  81 extern struct secondary_data secondary_data;
  82
  83 extern int __cpu_disable(void);
  84 extern int platform_cpu_disable(unsigned int cpu);
  85
  86 extern void __cpu_die(unsigned int cpu);
  87 extern void cpu_die(void);
  88
  89 extern void platform_cpu_die(unsigned int cpu);
  90 extern int platform_cpu_kill(unsigned int cpu);
  91 extern void platform_cpu_enable(unsigned int cpu);
  92
  93 extern void arch_send_call_function_single_ipi(int cpu);
  94 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
  95
  96 #endif /* ifndef __ASM_ARM_SMP_H */