LXR linux/arch/sh/kernel/irq

   1/*
   2 * SHcompact 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
  13void notrace arch_local_irq_restore(unsigned long flags)
  14{
  15        unsigned long __dummy0, __dummy1;
  16
  17        if (flags == ARCH_IRQ_DISABLED) {
  18                __asm__ __volatile__ (
  19                        "stc    sr, %0\n\t"
  20                        "or     #0xf0, %0\n\t"
  21                        "ldc    %0, sr\n\t"
  22                        : "=&z" (__dummy0)
  23                        : /* no inputs */
  24                        : "memory"
  25                );
  26        } else {
  27                __asm__ __volatile__ (
  28                        "stc    sr, %0\n\t"
  29                        "and    %1, %0\n\t"
  30#ifdef CONFIG_CPU_HAS_SR_RB
  31                        "stc    r6_bank, %1\n\t"
  32                        "or     %1, %0\n\t"
  33#endif
  34                        "ldc    %0, sr\n\t"
  35                        : "=&r" (__dummy0), "=r" (__dummy1)
  36                        : "1" (~ARCH_IRQ_DISABLED)
  37                        : "memory"
  38                );
  39        }
  40}
  41EXPORT_SYMBOL(arch_local_irq_restore);
  42
  43unsigned long notrace arch_local_save_flags(void)
  44{
  45        unsigned long flags;
  46
  47        __asm__ __volatile__ (
  48                "stc    sr, %0\n\t"
  49                "and    #0xf0, %0\n\t"
  50                : "=&z" (flags)
  51                : /* no inputs */
  52                : "memory"
  53        );
  54
  55        return flags;
  56}
  57EXPORT_SYMBOL(arch_local_save_flags);
  58