arch/sh/kernel/irq_64.c

   1 /*
   2  * SHmedia irqflags support
   3  *
   4  * Copyright (C) 2006 - 2009 Paul Mundt
   5  *
   6  * This file is subject to the terms and conditions of the GNU General Public
   7  * License. See the file "COPYING" in the main directory of this archive
   8  * for more details.
   9  */
  10 #include <linux/irqflags.h>
  11 #include <linux/module.h>
  12 #include <cpu/registers.h>
  13
  14 void notrace arch_local_irq_restore(unsigned long flags)
  15 {
  16         unsigned long long __dummy;
  17
  18         if (flags == ARCH_IRQ_DISABLED) {
  19                 __asm__ __volatile__ (
  20                         "getcon " __SR ", %0\n\t"
  21                         "or     %0, %1, %0\n\t"
  22                         "putcon %0, " __SR "\n\t"
  23                         : "=&r" (__dummy)
  24                         : "r" (ARCH_IRQ_DISABLED)
  25                 );
  26         } else {
  27                 __asm__ __volatile__ (
  28                         "getcon " __SR ", %0\n\t"
  29                         "and    %0, %1, %0\n\t"
  30                         "putcon %0, " __SR "\n\t"
  31                         : "=&r" (__dummy)
  32                         : "r" (~ARCH_IRQ_DISABLED)
  33                 );
  34         }
  35 }
  36 EXPORT_SYMBOL(arch_local_irq_restore);
  37
  38 unsigned long notrace arch_local_save_flags(void)
  39 {
  40         unsigned long flags;
  41
  42         __asm__ __volatile__ (
  43                 "getcon " __SR ", %0\n\t"
  44                 "and    %0, %1, %0"
  45                 : "=&r" (flags)
  46                 : "r" (ARCH_IRQ_DISABLED)
  47         );
  48
  49         return flags;
  50 }
  51 EXPORT_SYMBOL(arch_local_save_flags);