projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| fb9bd7d6 MZ |
1 | /* |
| 2 | * Copyright (C) 2012 ARM Ltd. | |
| 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 | * This program is distributed in the hope that it will be useful, | |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 11 | * GNU General Public License for more details. | |
| 12 | * | |
| 13 | * You should have received a copy of the GNU General Public License | |
| 14 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 15 | */ | |
| 16 | #ifndef __ASM_IRQFLAGS_H | |
| 17 | #define __ASM_IRQFLAGS_H | |
| 18 | ||
| 19 | #ifdef __KERNEL__ | |
| 20 | ||
| 21 | #include <asm/ptrace.h> | |
| 22 | ||
| 23 | /* | |
| 24 | * CPU interrupt mask handling. | |
| 25 | */ | |
| 26 | static inline unsigned long arch_local_irq_save(void) | |
| 27 | { | |
| 28 | unsigned long flags; | |
| 29 | asm volatile( | |
| 30 | "mrs %0, daif // arch_local_irq_save\n" | |
| 31 | "msr daifset, #2" | |
| 32 | : "=r" (flags) | |
| 33 | : | |
| 34 | : "memory"); | |
| 35 | return flags; | |
| 36 | } | |
| 37 | ||
| 38 | static inline void arch_local_irq_enable(void) | |
| 39 | { | |
| 40 | asm volatile( | |
| 41 | "msr daifclr, #2 // arch_local_irq_enable" | |
| 42 | : | |
| 43 | : | |
| 44 | : "memory"); | |
| 45 | } | |
| 46 | ||
| 47 | static inline void arch_local_irq_disable(void) | |
| 48 | { | |
| 49 | asm volatile( | |
| 50 | "msr daifset, #2 // arch_local_irq_disable" | |
| 51 | : | |
| 52 | : | |
| 53 | : "memory"); | |
| 54 | } | |
| 55 | ||
| 56 | #define local_fiq_enable() asm("msr daifclr, #1" : : : "memory") | |
| 57 | #define local_fiq_disable() asm("msr daifset, #1" : : : "memory") | |
| 58 | ||
| 59 | /* | |
| 60 | * Save the current interrupt enable state. | |
| 61 | */ | |
| 62 | static inline unsigned long arch_local_save_flags(void) | |
| 63 | { | |
| 64 | unsigned long flags; | |
| 65 | asm volatile( | |
| 66 | "mrs %0, daif // arch_local_save_flags" | |
| 67 | : "=r" (flags) | |
| 68 | : | |
| 69 | : "memory"); | |
| 70 | return flags; | |
| 71 | } | |
| 72 | ||
| 73 | /* | |
| 74 | * restore saved IRQ state | |
| 75 | */ | |
| 76 | static inline void arch_local_irq_restore(unsigned long flags) | |
| 77 | { | |
| 78 | asm volatile( | |
| 79 | "msr daif, %0 // arch_local_irq_restore" | |
| 80 | : | |
| 81 | : "r" (flags) | |
| 82 | : "memory"); | |
| 83 | } | |
| 84 | ||
| 85 | static inline int arch_irqs_disabled_flags(unsigned long flags) | |
| 86 | { | |
| 87 | return flags & PSR_I_BIT; | |
| 88 | } | |
| 89 | ||
| 90 | #endif | |
| 91 | #endif |