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 SMP cpu_possible_map
  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(cpumask_t callmap);
  57
  58 /*
  59  * Broadcast a timer interrupt to the other CPUs.
  60  */
  61 extern void smp_send_timer(void);
  62
  63 /*
  64  * Broadcast a clock event to other CPUs.
  65  */
  66 extern void smp_timer_broadcast(cpumask_t mask);
  67
  68 /*
  69  * Boot a secondary CPU, and assign it the specified idle task.
  70  * This also gives us the initial stack to use for this CPU.
  71  */
  72 extern int boot_secondary(unsigned int cpu, struct task_struct *);
  73
  74 /*
  75  * Called from platform specific assembly code, this is the
  76  * secondary CPU entry point.
  77  */
  78 asmlinkage void secondary_start_kernel(void);
  79
  80 /*
  81  * Perform platform specific initialisation of the specified CPU.
  82  */
  83 extern void platform_secondary_init(unsigned int cpu);
  84
  85 /*
  86  * Initial data for bringing up a secondary CPU.
  87  */
  88 struct secondary_data {
  89         unsigned long pgdir;
  90         void *stack;
  91 };
  92 extern struct secondary_data secondary_data;
  93
  94 extern int __cpu_disable(void);
  95 extern int mach_cpu_disable(unsigned int cpu);
  96
  97 extern void __cpu_die(unsigned int cpu);
  98 extern void cpu_die(void);
  99
 100 extern void platform_cpu_die(unsigned int cpu);
 101 extern int platform_cpu_kill(unsigned int cpu);
 102 extern void platform_cpu_enable(unsigned int cpu);
 103
 104 extern void arch_send_call_function_single_ipi(int cpu);
 105 extern void arch_send_call_function_ipi(cpumask_t mask);
 106
 107 /*
 108  * Local timer interrupt handling function (can be IPI'ed).
 109  */
 110 extern void local_timer_interrupt(void);
 111
 112 #ifdef CONFIG_LOCAL_TIMERS
 113
 114 /*
 115  * Stop a local timer interrupt.
 116  */
 117 extern void local_timer_stop(unsigned int cpu);
 118
 119 /*
 120  * Platform provides this to acknowledge a local timer IRQ
 121  */
 122 extern int local_timer_ack(void);
 123
 124 #else
 125
 126 static inline void local_timer_stop(unsigned int cpu)
 127 {
 128 }
 129
 130 #endif
 131
 132 /*
 133  * Setup a local timer interrupt for a CPU.
 134  */
 135 extern void local_timer_setup(unsigned int cpu);
 136
 137 /*
 138  * show local interrupt info
 139  */
 140 extern void show_local_irqs(struct seq_file *);
 141
 142 /*
 143  * Called from assembly, this is the local timer IRQ handler
 144  */
 145 asmlinkage void do_local_timer(struct pt_regs *);
 146
 147 #endif /* ifndef __ASM_ARM_SMP_H */