git://bbs.cooldavid.org / net-next-2.6.git / blame
| Commit | Line | Data |
|---|---|---|
| 4dbdc9a5 MS |
1 | /* |
| 2 | * Copyright (C) 2006 Atmark Techno, Inc. | |
| 3 | * | |
| 4 | * This file is subject to the terms and conditions of the GNU General Public | |
| 5 | * License. See the file "COPYING" in the main directory of this archive | |
| 6 | * for more details. | |
| 7 | */ | |
| 8 | ||
| 9 | #ifndef _ASM_MICROBLAZE_IRQFLAGS_H | |
| 10 | #define _ASM_MICROBLAZE_IRQFLAGS_H | |
| 11 | ||
| df9ee292 | 12 | #include <linux/types.h> |
| a3cd613b | 13 | #include <asm/registers.h> |
| 4dbdc9a5 | 14 | |
| df9ee292 DH |
15 | #ifdef CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR |
| 16 | ||
| 17 | static inline unsigned long arch_local_irq_save(void) | |
| 18 | { | |
| 19 | unsigned long flags; | |
| 20 | asm volatile(" msrclr %0, %1 \n" | |
| 21 | " nop \n" | |
| 22 | : "=r"(flags) | |
| 23 | : "i"(MSR_IE) | |
| 24 | : "memory"); | |
| 25 | return flags; | |
| 26 | } | |
| 27 | ||
| 28 | static inline void arch_local_irq_disable(void) | |
| 29 | { | |
| 30 | /* this uses r0 without declaring it - is that correct? */ | |
| 31 | asm volatile(" msrclr r0, %0 \n" | |
| 32 | " nop \n" | |
| 33 | : | |
| 34 | : "i"(MSR_IE) | |
| 35 | : "memory"); | |
| 36 | } | |
| 37 | ||
| 38 | static inline void arch_local_irq_enable(void) | |
| 39 | { | |
| 40 | /* this uses r0 without declaring it - is that correct? */ | |
| 41 | asm volatile(" msrset r0, %0 \n" | |
| 42 | " nop \n" | |
| 43 | : | |
| 44 | : "i"(MSR_IE) | |
| 45 | : "memory"); | |
| 46 | } | |
| 47 | ||
| 48 | #else /* !CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */ | |
| 49 | ||
| 50 | static inline unsigned long arch_local_irq_save(void) | |
| 51 | { | |
| 52 | unsigned long flags, tmp; | |
| 53 | asm volatile (" mfs %0, rmsr \n" | |
| 54 | " nop \n" | |
| 55 | " andi %1, %0, %2 \n" | |
| 56 | " mts rmsr, %1 \n" | |
| 57 | " nop \n" | |
| 58 | : "=r"(flags), "=r"(tmp) | |
| 59 | : "i"(~MSR_IE) | |
| 60 | : "memory"); | |
| 61 | return flags; | |
| 62 | } | |
| 63 | ||
| 64 | static inline void arch_local_irq_disable(void) | |
| 65 | { | |
| 66 | unsigned long tmp; | |
| 67 | asm volatile(" mfs %0, rmsr \n" | |
| 68 | " nop \n" | |
| 69 | " andi %0, %0, %1 \n" | |
| 70 | " mts rmsr, %0 \n" | |
| 71 | " nop \n" | |
| 72 | : "=r"(tmp) | |
| 73 | : "i"(~MSR_IE) | |
| 74 | : "memory"); | |
| 75 | } | |
| 76 | ||
| 77 | static inline void arch_local_irq_enable(void) | |
| 78 | { | |
| 79 | unsigned long tmp; | |
| 80 | asm volatile(" mfs %0, rmsr \n" | |
| 81 | " nop \n" | |
| 82 | " ori %0, %0, %1 \n" | |
| 83 | " mts rmsr, %0 \n" | |
| 84 | " nop \n" | |
| 85 | : "=r"(tmp) | |
| 86 | : "i"(MSR_IE) | |
| 87 | : "memory"); | |
| 88 | } | |
| 89 | ||
| 90 | #endif /* CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */ | |
| 91 | ||
| 92 | static inline unsigned long arch_local_save_flags(void) | |
| 4dbdc9a5 MS |
93 | { |
| 94 | unsigned long flags; | |
| df9ee292 DH |
95 | asm volatile(" mfs %0, rmsr \n" |
| 96 | " nop \n" | |
| 97 | : "=r"(flags) | |
| 98 | : | |
| 99 | : "memory"); | |
| a3cd613b | 100 | return flags; |
| 4dbdc9a5 MS |
101 | } |
| 102 | ||
| df9ee292 DH |
103 | static inline void arch_local_irq_restore(unsigned long flags) |
| 104 | { | |
| 105 | asm volatile(" mts rmsr, %0 \n" | |
| 106 | " nop \n" | |
| 107 | : | |
| 108 | : "r"(flags) | |
| 109 | : "memory"); | |
| 110 | } | |
| 111 | ||
| 112 | static inline bool arch_irqs_disabled_flags(unsigned long flags) | |
| 113 | { | |
| 114 | return (flags & MSR_IE) == 0; | |
| 115 | } | |
| 116 | ||
| 117 | static inline bool arch_irqs_disabled(void) | |
| 118 | { | |
| 119 | return arch_irqs_disabled_flags(arch_local_save_flags()); | |
| 120 | } | |
| 4dbdc9a5 MS |
121 | |
| 122 | #endif /* _ASM_MICROBLAZE_IRQFLAGS_H */ |