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
  10 static 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
  17 static 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
  32 static 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
  54 static 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
  61 static inline void arch_local_irq_restore(unsigned long flags)
  62 {
  63         asm volatile ("movew %0,%%sr" : : "d" (flags) : "memory");
  64 }
  65
  66 static 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
  75 static inline bool arch_irqs_disabled(void)
  76 {
  77         return arch_irqs_disabled_flags(arch_local_save_flags());
  78 }
  79
  80 #endif /* _M68K_IRQFLAGS_H */