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 */
  15 static 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 */
  24 static 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 */
  30 static 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 */
  38 static 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 */
  46 static 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 */
  56 static inline int arch_irqs_disabled_flags(unsigned long flags)
  57 {
  58         return (flags & 1) == 0;
  59 }
  60
  61 /* test hardware interrupt enable bit */
  62 static 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 */