arch/mips/kernel/smp-gic.c

   1 /*
   2  * Copyright (C) 2013 Imagination Technologies
   3  * Author: Paul Burton <paul.burton@imgtec.com>
   4  *
   5  * Based on smp-cmp.c:
   6  *  Copyright (C) 2007 MIPS Technologies, Inc.
   7  *  Author: Chris Dearman (chris@mips.com)
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU General Public License as published by the
  11  * Free Software Foundation;  either version 2 of the  License, or (at your
  12  * option) any later version.
  13  */
  14
  15 #include <linux/printk.h>
  16
  17 #include <asm/gic.h>
  18 #include <asm/smp-ops.h>
  19
  20 void gic_send_ipi_single(int cpu, unsigned int action)
  21 {
  22         unsigned long flags;
  23         unsigned int intr;
  24
  25         pr_debug("CPU%d: %s cpu %d action %u status %08x\n",
  26                  smp_processor_id(), __func__, cpu, action, read_c0_status());
  27
  28         local_irq_save(flags);
  29
  30         switch (action) {
  31         case SMP_CALL_FUNCTION:
  32                 intr = plat_ipi_call_int_xlate(cpu);
  33                 break;
  34
  35         case SMP_RESCHEDULE_YOURSELF:
  36                 intr = plat_ipi_resched_int_xlate(cpu);
  37                 break;
  38
  39         default:
  40                 BUG();
  41         }
  42
  43         gic_send_ipi(intr);
  44         local_irq_restore(flags);
  45 }
  46
  47 void gic_send_ipi_mask(const struct cpumask *mask, unsigned int action)
  48 {
  49         unsigned int i;
  50
  51         for_each_cpu(i, mask)
  52                 gic_send_ipi_single(i, action);
  53 }