arch/riscv/include/asm/smp.h

   1 /*
   2  * Copyright (C) 2012 Regents of the University of California
   3  *
   4  *   This program is free software; you can redistribute it and/or
   5  *   modify it under the terms of the GNU General Public License
   6  *   as published by the Free Software Foundation, version 2.
   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
  14 #ifndef _ASM_RISCV_SMP_H
  15 #define _ASM_RISCV_SMP_H
  16
  17 /* This both needs asm-offsets.h and is used when generating it. */
  18 #ifndef GENERATING_ASM_OFFSETS
  19 #include <asm/asm-offsets.h>
  20 #endif
  21
  22 #include <linux/cpumask.h>
  23 #include <linux/irqreturn.h>
  24
  25 #ifdef CONFIG_SMP
  26
  27 /* SMP initialization hook for setup_arch */
  28 void __init init_clockevent(void);
  29
  30 /* SMP initialization hook for setup_arch */
  31 void __init setup_smp(void);
  32
  33 /* Hook for the generic smp_call_function_many() routine. */
  34 void arch_send_call_function_ipi_mask(struct cpumask *mask);
  35
  36 /* Hook for the generic smp_call_function_single() routine. */
  37 void arch_send_call_function_single_ipi(int cpu);
  38
  39 /*
  40  * This is particularly ugly: it appears we can't actually get the definition
  41  * of task_struct here, but we need access to the CPU this task is running on.
  42  * Instead of using C we're using asm-offsets.h to get the current processor
  43  * ID.
  44  */
  45 #define raw_smp_processor_id() (*((int*)((char*)get_current() + TASK_TI_CPU)))
  46
  47 /* Interprocessor interrupt handler */
  48 irqreturn_t handle_ipi(void);
  49
  50 #endif /* CONFIG_SMP */
  51
  52 #endif /* _ASM_RISCV_SMP_H */