projects / linux-2.6 / blame
| Commit | Line | Data |
|---|---|---|
| 5f97f7f9 HS |
1 | /* |
| 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 | ||
| 13 | static 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 | */ | |
| 28 | static inline void raw_local_irq_restore(unsigned long flags) | |
| 29 | { | |
| 30 | sysreg_write(SR, flags); | |
| 31 | asm volatile("" : : : "memory", "cc"); | |
| 32 | } | |
| 33 | ||
| 34 | static inline void raw_local_irq_disable(void) | |
| 35 | { | |
| 36 | asm volatile("ssrf %0" : : "n"(SYSREG_GM_OFFSET) : "memory"); | |
| 37 | } | |
| 38 | ||
| 39 | static inline void raw_local_irq_enable(void) | |
| 40 | { | |
| 41 | asm volatile("csrf %0" : : "n"(SYSREG_GM_OFFSET) : "memory"); | |
| 42 | } | |
| 43 | ||
| 44 | static inline int raw_irqs_disabled_flags(unsigned long flags) | |
| 45 | { | |
| 46 | return (flags & SYSREG_BIT(GM)) != 0; | |
| 47 | } | |
| 48 | ||
| 49 | static 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 | ||
| 56 | static 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 */ |