73 lines
1.7 KiB
C
73 lines
1.7 KiB
C
|
/*
|
||
|
|
* 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\n" : "=b"(flags));
|
||
|
|
return flags;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* set interrupt enabled status */
|
||
|
|
static inline void arch_local_irq_restore(unsigned long flags)
|
||
|
|
{
|
||
|
|
asm volatile (" mvc .s2 %0,CSR\n" : : "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 */
|