LXR linux/arch/arm64/include/asm/smp.h

   1/*
   2 * Copyright (C) 2012 ARM Ltd.
   3 *
   4 * This program is free software; you can redistribute it and/or modify
   5 * it under the terms of the GNU General Public License version 2 as
   6 * published by the Free Software Foundation.
   7 *
   8 * This program is distributed in the hope that it will be useful,
   9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 * GNU General Public License for more details.
  12 *
  13 * You should have received a copy of the GNU General Public License
  14 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15 */
  16#ifndef __ASM_SMP_H
  17#define __ASM_SMP_H
  18
  19#include <linux/threads.h>
  20#include <linux/cpumask.h>
  21#include <linux/thread_info.h>
  22
  23#define raw_smp_processor_id() (current_thread_info()->cpu)
  24
  25struct seq_file;
  26
  27/*
  28 * generate IPI list text
  29 */
  30extern void show_ipi_list(struct seq_file *p, int prec);
  31
  32/*
  33 * Called from C code, this handles an IPI.
  34 */
  35extern void handle_IPI(int ipinr, struct pt_regs *regs);
  36
  37/*
  38 * Discover the set of possible CPUs and determine their
  39 * SMP operations.
  40 */
  41extern void smp_init_cpus(void);
  42
  43/*
  44 * Provide a function to raise an IPI cross call on CPUs in callmap.
  45 */
  46extern void set_smp_cross_call(void (*)(const struct cpumask *, unsigned int));
  47
  48extern void (*__smp_cross_call)(const struct cpumask *, unsigned int);
  49
  50/*
  51 * Called from the secondary holding pen, this is the secondary CPU entry point.
  52 */
  53asmlinkage void secondary_start_kernel(void);
  54
  55/*
  56 * Initial data for bringing up a secondary CPU.
  57 */
  58struct secondary_data {
  59        void *stack;
  60};
  61extern struct secondary_data secondary_data;
  62extern void secondary_entry(void);
  63
  64extern void arch_send_call_function_single_ipi(int cpu);
  65extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
  66
  67extern int __cpu_disable(void);
  68
  69extern void __cpu_die(unsigned int cpu);
  70extern void cpu_die(void);
  71
  72#endif /* ifndef __ASM_SMP_H */
  73