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kernel add
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/*
* C6X IRQ flag handling
*
* Copyright (C) 2010 Texas Instruments Incorporated
* Written by Mark Salter (msalter@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public Licence
* as published by the Free Software Foundation; either version
* 2 of the Licence, or (at your option) any later version.
*/
#ifndef _ASM_IRQFLAGS_H
#define _ASM_IRQFLAGS_H
#ifndef __ASSEMBLY__
/* read interrupt enabled status */
static inline unsigned long arch_local_save_flags(void)
{
unsigned long flags;
asm volatile (" mvc .s2 CSR,%0
" : "=b"(flags));
return flags;
}
/* set interrupt enabled status */
static inline void arch_local_irq_restore(unsigned long flags)
{
asm volatile (" mvc .s2 %0,CSR
" : : "b"(flags) : "memory");
}
/* unconditionally enable interrupts */
static inline void arch_local_irq_enable(void)
{
unsigned long flags = arch_local_save_flags();
flags |= 1;
arch_local_irq_restore(flags);
}
/* unconditionally disable interrupts */
static inline void arch_local_irq_disable(void)
{
unsigned long flags = arch_local_save_flags();
flags &= ~1;
arch_local_irq_restore(flags);
}
/* get status and disable interrupts */
static inline unsigned long arch_local_irq_save(void)
{
unsigned long flags;
flags = arch_local_save_flags();
arch_local_irq_restore(flags & ~1);
return flags;
}
/* test flags */
static inline int arch_irqs_disabled_flags(unsigned long flags)
{
return (flags & 1) == 0;
}
/* test hardware interrupt enable bit */
static inline int arch_irqs_disabled(void)
{
return arch_irqs_disabled_flags(arch_local_save_flags());
}
#endif /* __ASSEMBLY__ */
#endif /* __ASM_IRQFLAGS_H */
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