arch/loongarch/include/asm/irqflags.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
   4  */
   5 #ifndef _ASM_IRQFLAGS_H
   6 #define _ASM_IRQFLAGS_H
   7
   8 #ifndef __ASSEMBLY__
   9
  10 #include <linux/compiler.h>
  11 #include <linux/stringify.h>
  12 #include <asm/loongarch.h>
  13
  14 static inline void arch_local_irq_enable(void)
  15 {
  16         u32 flags = CSR_CRMD_IE;
  17         __asm__ __volatile__(
  18                 "csrxchg %[val], %[mask], %[reg]\n\t"
  19                 : [val] "+r" (flags)
  20                 : [mask] "r" (CSR_CRMD_IE), [reg] "i" (LOONGARCH_CSR_CRMD)
  21                 : "memory");
  22 }
  23
  24 static inline void arch_local_irq_disable(void)
  25 {
  26         u32 flags = 0;
  27         __asm__ __volatile__(
  28                 "csrxchg %[val], %[mask], %[reg]\n\t"
  29                 : [val] "+r" (flags)
  30                 : [mask] "r" (CSR_CRMD_IE), [reg] "i" (LOONGARCH_CSR_CRMD)
  31                 : "memory");
  32 }
  33
  34 static inline unsigned long arch_local_irq_save(void)
  35 {
  36         u32 flags = 0;
  37         __asm__ __volatile__(
  38                 "csrxchg %[val], %[mask], %[reg]\n\t"
  39                 : [val] "+r" (flags)
  40                 : [mask] "r" (CSR_CRMD_IE), [reg] "i" (LOONGARCH_CSR_CRMD)
  41                 : "memory");
  42         return flags;
  43 }
  44
  45 static inline void arch_local_irq_restore(unsigned long flags)
  46 {
  47         __asm__ __volatile__(
  48                 "csrxchg %[val], %[mask], %[reg]\n\t"
  49                 : [val] "+r" (flags)
  50                 : [mask] "r" (CSR_CRMD_IE), [reg] "i" (LOONGARCH_CSR_CRMD)
  51                 : "memory");
  52 }
  53
  54 static inline unsigned long arch_local_save_flags(void)
  55 {
  56         u32 flags;
  57         __asm__ __volatile__(
  58                 "csrrd %[val], %[reg]\n\t"
  59                 : [val] "=r" (flags)
  60                 : [reg] "i" (LOONGARCH_CSR_CRMD)
  61                 : "memory");
  62         return flags;
  63 }
  64
  65 static inline int arch_irqs_disabled_flags(unsigned long flags)
  66 {
  67         return !(flags & CSR_CRMD_IE);
  68 }
  69
  70 static inline int arch_irqs_disabled(void)
  71 {
  72         return arch_irqs_disabled_flags(arch_local_save_flags());
  73 }
  74
  75 #endif /* #ifndef __ASSEMBLY__ */
  76
  77 #endif /* _ASM_IRQFLAGS_H */