LXR linux/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/processor.h>
  11#include <asm/csr.h>
  12
  13/* read interrupt enabled status */
  14static inline unsigned long arch_local_save_flags(void)
  15{
  16        return csr_read(CSR_SSTATUS);
  17}
  18
  19/* unconditionally enable interrupts */
  20static inline void arch_local_irq_enable(void)
  21{
  22        csr_set(CSR_SSTATUS, SR_SIE);
  23}
  24
  25/* unconditionally disable interrupts */
  26static inline void arch_local_irq_disable(void)
  27{
  28        csr_clear(CSR_SSTATUS, SR_SIE);
  29}
  30
  31/* get status and disable interrupts */
  32static inline unsigned long arch_local_irq_save(void)
  33{
  34        return csr_read_clear(CSR_SSTATUS, SR_SIE);
  35}
  36
  37/* test flags */
  38static inline int arch_irqs_disabled_flags(unsigned long flags)
  39{
  40        return !(flags & SR_SIE);
  41}
  42
  43/* test hardware interrupt enable bit */
  44static inline int arch_irqs_disabled(void)
  45{
  46        return arch_irqs_disabled_flags(arch_local_save_flags());
  47}
  48
  49/* set interrupt enabled status */
  50static inline void arch_local_irq_restore(unsigned long flags)
  51{
  52        csr_set(CSR_SSTATUS, flags & SR_SIE);
  53}
  54
  55#endif /* _ASM_RISCV_IRQFLAGS_H */
  56