kernel/arch/sh/kernel/irq_32.c

   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
  13 void 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 }
  41 EXPORT_SYMBOL(arch_local_irq_restore);
  42
  43 unsigned 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 }
  57 EXPORT_SYMBOL(arch_local_save_flags);