69 строки
1.5 KiB
C
69 строки
1.5 KiB
C
/*
|
|
* Copyright (C) 2004-2006 Atmel Corporation
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
#ifndef __ASM_AVR32_IRQFLAGS_H
|
|
#define __ASM_AVR32_IRQFLAGS_H
|
|
|
|
#include <asm/sysreg.h>
|
|
|
|
static inline unsigned long __raw_local_save_flags(void)
|
|
{
|
|
return sysreg_read(SR);
|
|
}
|
|
|
|
#define raw_local_save_flags(x) \
|
|
do { (x) = __raw_local_save_flags(); } while (0)
|
|
|
|
/*
|
|
* This will restore ALL status register flags, not only the interrupt
|
|
* mask flag.
|
|
*
|
|
* The empty asm statement informs the compiler of this fact while
|
|
* also serving as a barrier.
|
|
*/
|
|
static inline void raw_local_irq_restore(unsigned long flags)
|
|
{
|
|
sysreg_write(SR, flags);
|
|
asm volatile("" : : : "memory", "cc");
|
|
}
|
|
|
|
static inline void raw_local_irq_disable(void)
|
|
{
|
|
asm volatile("ssrf %0" : : "n"(SYSREG_GM_OFFSET) : "memory");
|
|
}
|
|
|
|
static inline void raw_local_irq_enable(void)
|
|
{
|
|
asm volatile("csrf %0" : : "n"(SYSREG_GM_OFFSET) : "memory");
|
|
}
|
|
|
|
static inline int raw_irqs_disabled_flags(unsigned long flags)
|
|
{
|
|
return (flags & SYSREG_BIT(GM)) != 0;
|
|
}
|
|
|
|
static inline int raw_irqs_disabled(void)
|
|
{
|
|
unsigned long flags = __raw_local_save_flags();
|
|
|
|
return raw_irqs_disabled_flags(flags);
|
|
}
|
|
|
|
static inline unsigned long __raw_local_irq_save(void)
|
|
{
|
|
unsigned long flags = __raw_local_save_flags();
|
|
|
|
raw_local_irq_disable();
|
|
|
|
return flags;
|
|
}
|
|
|
|
#define raw_local_irq_save(flags) \
|
|
do { (flags) = __raw_local_irq_save(); } while (0)
|
|
|
|
#endif /* __ASM_AVR32_IRQFLAGS_H */
|