root/arch/riscv/include/asm/irqflags.h

INCLUDED FROM

DEFINITIONS

1. arch_local_save_flags
2. arch_local_irq_enable
3. arch_local_irq_disable
4. arch_local_irq_save
5. arch_irqs_disabled_flags
6. arch_irqs_disabled
7. arch_local_irq_restore

   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 */
  14 static inline unsigned long arch_local_save_flags(void)
  15 {
  16         return csr_read(CSR_SSTATUS);
  17 }
  18 
  19 /* unconditionally enable interrupts */
  20 static inline void arch_local_irq_enable(void)
  21 {
  22         csr_set(CSR_SSTATUS, SR_SIE);
  23 }
  24 
  25 /* unconditionally disable interrupts */
  26 static inline void arch_local_irq_disable(void)
  27 {
  28         csr_clear(CSR_SSTATUS, SR_SIE);
  29 }
  30 
  31 /* get status and disable interrupts */
  32 static inline unsigned long arch_local_irq_save(void)
  33 {
  34         return csr_read_clear(CSR_SSTATUS, SR_SIE);
  35 }
  36 
  37 /* test flags */
  38 static inline int arch_irqs_disabled_flags(unsigned long flags)
  39 {
  40         return !(flags & SR_SIE);
  41 }
  42 
  43 /* test hardware interrupt enable bit */
  44 static inline int arch_irqs_disabled(void)
  45 {
  46         return arch_irqs_disabled_flags(arch_local_save_flags());
  47 }
  48 
  49 /* set interrupt enabled status */
  50 static 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 */