LXR linux/arch/c6x/include/asm/irqflags.h

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 *  C6X IRQ flag handling
   4 *
   5 * Copyright (C) 2010 Texas Instruments Incorporated
   6 * Written by Mark Salter (msalter@redhat.com)
   7 */
   8
   9#ifndef _ASM_IRQFLAGS_H
  10#define _ASM_IRQFLAGS_H
  11
  12#ifndef __ASSEMBLY__
  13
  14/* read interrupt enabled status */
  15static inline unsigned long arch_local_save_flags(void)
  16{
  17        unsigned long flags;
  18
  19        asm volatile (" mvc .s2 CSR,%0\n" : "=b"(flags));
  20        return flags;
  21}
  22
  23/* set interrupt enabled status */
  24static inline void arch_local_irq_restore(unsigned long flags)
  25{
  26        asm volatile (" mvc .s2 %0,CSR\n" : : "b"(flags) : "memory");
  27}
  28
  29/* unconditionally enable interrupts */
  30static inline void arch_local_irq_enable(void)
  31{
  32        unsigned long flags = arch_local_save_flags();
  33        flags |= 1;
  34        arch_local_irq_restore(flags);
  35}
  36
  37/* unconditionally disable interrupts */
  38static inline void arch_local_irq_disable(void)
  39{
  40        unsigned long flags = arch_local_save_flags();
  41        flags &= ~1;
  42        arch_local_irq_restore(flags);
  43}
  44
  45/* get status and disable interrupts */
  46static inline unsigned long arch_local_irq_save(void)
  47{
  48        unsigned long flags;
  49
  50        flags = arch_local_save_flags();
  51        arch_local_irq_restore(flags & ~1);
  52        return flags;
  53}
  54
  55/* test flags */
  56static inline int arch_irqs_disabled_flags(unsigned long flags)
  57{
  58        return (flags & 1) == 0;
  59}
  60
  61/* test hardware interrupt enable bit */
  62static inline int arch_irqs_disabled(void)
  63{
  64        return arch_irqs_disabled_flags(arch_local_save_flags());
  65}
  66
  67#endif /* __ASSEMBLY__ */
  68#endif /* __ASM_IRQFLAGS_H */
  69