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#ifndef CONFIG_SMP
  24# error "<asm/smp.h> included in non-SMP build"
  25#endif
  26
  27#define raw_smp_processor_id() (current_thread_info()->cpu)
  28
  29struct seq_file;
  30
  31/*
  32 * generate IPI list text
  33 */
  34extern void show_ipi_list(struct seq_file *p, int prec);
  35
  36/*
  37 * Called from C code, this handles an IPI.
  38 */
  39extern void handle_IPI(int ipinr, struct pt_regs *regs);
  40
  41/*
  42 * Setup the set of possible CPUs (via set_cpu_possible)
  43 */
  44extern void smp_init_cpus(void);
  45
  46/*
  47 * Provide a function to raise an IPI cross call on CPUs in callmap.
  48 */
  49extern void set_smp_cross_call(void (*)(const struct cpumask *, unsigned int));
  50
  51/*
  52 * Called from the secondary holding pen, this is the secondary CPU entry point.
  53 */
  54asmlinkage void secondary_start_kernel(void);
  55
  56/*
  57 * Initial data for bringing up a secondary CPU.
  58 */
  59struct secondary_data {
  60        void *stack;
  61};
  62extern struct secondary_data secondary_data;
  63extern void secondary_holding_pen(void);
  64extern volatile unsigned long secondary_holding_pen_release;
  65
  66extern void arch_send_call_function_single_ipi(int cpu);
  67extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
  68
  69struct device_node;
  70
  71struct smp_enable_ops {
  72        const char      *name;
  73        int             (*init_cpu)(struct device_node *, int);
  74        int             (*prepare_cpu)(int);
  75};
  76
  77extern const struct smp_enable_ops smp_spin_table_ops;
  78extern const struct smp_enable_ops smp_psci_ops;
  79
  80#endif /* ifndef __ASM_SMP_H */
  81