LXR linux/arch/m68k/include/asm/irqflags.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _M68K_IRQFLAGS_H
   3#define _M68K_IRQFLAGS_H
   4
   5#include <linux/types.h>
   6#include <linux/preempt.h>
   7#include <asm/thread_info.h>
   8#include <asm/entry.h>
   9
  10static inline unsigned long arch_local_save_flags(void)
  11{
  12        unsigned long flags;
  13        asm volatile ("movew %%sr,%0" : "=d" (flags) : : "memory");
  14        return flags;
  15}
  16
  17static inline void arch_local_irq_disable(void)
  18{
  19#ifdef CONFIG_COLDFIRE
  20        asm volatile (
  21                "move   %/sr,%%d0       \n\t"
  22                "ori.l  #0x0700,%%d0    \n\t"
  23                "move   %%d0,%/sr       \n"
  24                : /* no outputs */
  25                :
  26                : "cc", "%d0", "memory");
  27#else
  28        asm volatile ("oriw  #0x0700,%%sr" : : : "memory");
  29#endif
  30}
  31
  32static inline void arch_local_irq_enable(void)
  33{
  34#if defined(CONFIG_COLDFIRE)
  35        asm volatile (
  36                "move   %/sr,%%d0       \n\t"
  37                "andi.l #0xf8ff,%%d0    \n\t"
  38                "move   %%d0,%/sr       \n"
  39                : /* no outputs */
  40                :
  41                : "cc", "%d0", "memory");
  42#else
  43# if defined(CONFIG_MMU)
  44        if (MACH_IS_Q40 || !hardirq_count())
  45# endif
  46                asm volatile (
  47                        "andiw %0,%%sr"
  48                        :
  49                        : "i" (ALLOWINT)
  50                        : "memory");
  51#endif
  52}
  53
  54static inline unsigned long arch_local_irq_save(void)
  55{
  56        unsigned long flags = arch_local_save_flags();
  57        arch_local_irq_disable();
  58        return flags;
  59}
  60
  61static inline void arch_local_irq_restore(unsigned long flags)
  62{
  63        asm volatile ("movew %0,%%sr" : : "d" (flags) : "memory");
  64}
  65
  66static inline bool arch_irqs_disabled_flags(unsigned long flags)
  67{
  68        if (MACH_IS_ATARI) {
  69                /* Ignore HSYNC = ipl 2 on Atari */
  70                return (flags & ~(ALLOWINT | 0x200)) != 0;
  71        }
  72        return (flags & ~ALLOWINT) != 0;
  73}
  74
  75static inline bool arch_irqs_disabled(void)
  76{
  77        return arch_irqs_disabled_flags(arch_local_save_flags());
  78}
  79
  80#endif /* _M68K_IRQFLAGS_H */
  81