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
  25 struct seq_file;
  26
  27 /*
  28  * generate IPI list text
  29  */
  30 extern void show_ipi_list(struct seq_file *p, int prec);
  31
  32 /*
  33  * Called from C code, this handles an IPI.
  34  */
  35 extern 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  */
  41 extern void smp_init_cpus(void);
  42
  43 /*
  44  * Provide a function to raise an IPI cross call on CPUs in callmap.
  45  */
  46 extern void set_smp_cross_call(void (*)(const struct cpumask *, unsigned int));
  47
  48 extern 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  */
  53 asmlinkage void secondary_start_kernel(void);
  54
  55 /*
  56  * Initial data for bringing up a secondary CPU.
  57  */
  58 struct secondary_data {
  59         void *stack;
  60 };
  61 extern struct secondary_data secondary_data;
  62 extern void secondary_entry(void);
  63
  64 extern void arch_send_call_function_single_ipi(int cpu);
  65 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
  66
  67 extern int __cpu_disable(void);
  68
  69 extern void __cpu_die(unsigned int cpu);
  70 extern void cpu_die(void);
  71
  72 #endif /* ifndef __ASM_SMP_H */