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
  29 struct seq_file;
  30
  31 /*
  32  * generate IPI list text
  33  */
  34 extern void show_ipi_list(struct seq_file *p, int prec);
  35
  36 /*
  37  * Called from C code, this handles an IPI.
  38  */
  39 extern void handle_IPI(int ipinr, struct pt_regs *regs);
  40
  41 /*
  42  * Setup the set of possible CPUs (via set_cpu_possible)
  43  */
  44 extern void smp_init_cpus(void);
  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  * Called from the secondary holding pen, this is the secondary CPU entry point.
  53  */
  54 asmlinkage void secondary_start_kernel(void);
  55
  56 /*
  57  * Initial data for bringing up a secondary CPU.
  58  */
  59 struct secondary_data {
  60         void *stack;
  61 };
  62 extern struct secondary_data secondary_data;
  63 extern void secondary_holding_pen(void);
  64 extern volatile unsigned long secondary_holding_pen_release;
  65
  66 extern void arch_send_call_function_single_ipi(int cpu);
  67 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
  68
  69 struct device_node;
  70
  71 struct smp_enable_ops {
  72         const char      *name;
  73         int             (*init_cpu)(struct device_node *, int);
  74         int             (*prepare_cpu)(int);
  75 };
  76
  77 extern const struct smp_enable_ops smp_spin_table_ops;
  78 extern const struct smp_enable_ops smp_psci_ops;
  79
  80 #endif /* ifndef __ASM_SMP_H */