arch/riscv/include/asm/irqflags.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (C) 2012 Regents of the University of California
   4  */
   5
   6
   7 #ifndef _ASM_RISCV_IRQFLAGS_H
   8 #define _ASM_RISCV_IRQFLAGS_H
   9
  10 #include <asm/csr.h>
  11
  12 /* read interrupt enabled status */
  13 static inline unsigned long arch_local_save_flags(void)
  14 {
  15         return csr_read(CSR_STATUS);
  16 }
  17
  18 /* unconditionally enable interrupts */
  19 static inline void arch_local_irq_enable(void)
  20 {
  21         csr_set(CSR_STATUS, SR_IE);
  22 }
  23
  24 /* unconditionally disable interrupts */
  25 static inline void arch_local_irq_disable(void)
  26 {
  27         csr_clear(CSR_STATUS, SR_IE);
  28 }
  29
  30 /* get status and disable interrupts */
  31 static inline unsigned long arch_local_irq_save(void)
  32 {
  33         return csr_read_clear(CSR_STATUS, SR_IE);
  34 }
  35
  36 /* test flags */
  37 static inline int arch_irqs_disabled_flags(unsigned long flags)
  38 {
  39         return !(flags & SR_IE);
  40 }
  41
  42 /* test hardware interrupt enable bit */
  43 static inline int arch_irqs_disabled(void)
  44 {
  45         return arch_irqs_disabled_flags(arch_local_save_flags());
  46 }
  47
  48 /* set interrupt enabled status */
  49 static inline void arch_local_irq_restore(unsigned long flags)
  50 {
  51         csr_set(CSR_STATUS, flags & SR_IE);
  52 }
  53
  54 #endif /* _ASM_RISCV_IRQFLAGS_H */