arch/sh/kernel/irq_32.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * SHcompact irqflags support
   4  *
   5  * Copyright (C) 2006 - 2009 Paul Mundt
   6  */
   7 #include <linux/irqflags.h>
   8 #include <linux/module.h>
   9
  10 void notrace arch_local_irq_restore(unsigned long flags)
  11 {
  12         unsigned long __dummy0, __dummy1;
  13
  14         if (flags == ARCH_IRQ_DISABLED) {
  15                 __asm__ __volatile__ (
  16                         "stc    sr, %0\n\t"
  17                         "or     #0xf0, %0\n\t"
  18                         "ldc    %0, sr\n\t"
  19                         : "=&z" (__dummy0)
  20                         : /* no inputs */
  21                         : "memory"
  22                 );
  23         } else {
  24                 __asm__ __volatile__ (
  25                         "stc    sr, %0\n\t"
  26                         "and    %1, %0\n\t"
  27 #ifdef CONFIG_CPU_HAS_SR_RB
  28                         "stc    r6_bank, %1\n\t"
  29                         "or     %1, %0\n\t"
  30 #endif
  31                         "ldc    %0, sr\n\t"
  32                         : "=&r" (__dummy0), "=r" (__dummy1)
  33                         : "1" (~ARCH_IRQ_DISABLED)
  34                         : "memory"
  35                 );
  36         }
  37 }
  38 EXPORT_SYMBOL(arch_local_irq_restore);
  39
  40 unsigned long notrace arch_local_save_flags(void)
  41 {
  42         unsigned long flags;
  43
  44         __asm__ __volatile__ (
  45                 "stc    sr, %0\n\t"
  46                 "and    #0xf0, %0\n\t"
  47                 : "=&z" (flags)
  48                 : /* no inputs */
  49                 : "memory"
  50         );
  51
  52         return flags;
  53 }
  54 EXPORT_SYMBOL(arch_local_save_flags);