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Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -07001/*
2 * Copyright (C) 2004-2006 Atmel Corporation
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 */
8#ifndef __ASM_AVR32_IRQFLAGS_H
9#define __ASM_AVR32_IRQFLAGS_H
10
11#include <asm/sysreg.h>
12
13static inline unsigned long __raw_local_save_flags(void)
14{
15 return sysreg_read(SR);
16}
17
18#define raw_local_save_flags(x) \
19 do { (x) = __raw_local_save_flags(); } while (0)
20
21/*
22 * This will restore ALL status register flags, not only the interrupt
23 * mask flag.
24 *
25 * The empty asm statement informs the compiler of this fact while
26 * also serving as a barrier.
27 */
28static inline void raw_local_irq_restore(unsigned long flags)
29{
30 sysreg_write(SR, flags);
31 asm volatile("" : : : "memory", "cc");
32}
33
34static inline void raw_local_irq_disable(void)
35{
36 asm volatile("ssrf %0" : : "n"(SYSREG_GM_OFFSET) : "memory");
37}
38
39static inline void raw_local_irq_enable(void)
40{
41 asm volatile("csrf %0" : : "n"(SYSREG_GM_OFFSET) : "memory");
42}
43
44static inline int raw_irqs_disabled_flags(unsigned long flags)
45{
46 return (flags & SYSREG_BIT(GM)) != 0;
47}
48
49static inline int raw_irqs_disabled(void)
50{
51 unsigned long flags = __raw_local_save_flags();
52
53 return raw_irqs_disabled_flags(flags);
54}
55
56static inline unsigned long __raw_local_irq_save(void)
57{
58 unsigned long flags = __raw_local_save_flags();
59
60 raw_local_irq_disable();
61
62 return flags;
63}
64
65#define raw_local_irq_save(flags) \
66 do { (flags) = __raw_local_irq_save(); } while (0)
67
68#endif /* __ASM_AVR32_IRQFLAGS_H */