| Michal Simek | 4dbdc9a | 2009-03-27 14:25:35 +0100 | [diff] [blame] | 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 | |
| 12 | #include <linux/irqflags.h> |
| 13 | |
| 14 | # if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR |
| 15 | |
| 16 | # define local_irq_save(flags) \ |
| 17 | do { \ |
| 18 | asm volatile ("# local_irq_save \n\t" \ |
| 19 | "msrclr %0, %1 \n\t" \ |
| 20 | "nop \n\t" \ |
| 21 | : "=r"(flags) \ |
| 22 | : "i"(MSR_IE) \ |
| 23 | : "memory"); \ |
| 24 | } while (0) |
| 25 | |
| 26 | # define local_irq_disable() \ |
| 27 | do { \ |
| 28 | asm volatile ("# local_irq_disable \n\t" \ |
| 29 | "msrclr r0, %0 \n\t" \ |
| 30 | "nop \n\t" \ |
| 31 | : \ |
| 32 | : "i"(MSR_IE) \ |
| 33 | : "memory"); \ |
| 34 | } while (0) |
| 35 | |
| 36 | # define local_irq_enable() \ |
| 37 | do { \ |
| 38 | asm volatile ("# local_irq_enable \n\t" \ |
| 39 | "msrset r0, %0 \n\t" \ |
| 40 | "nop \n\t" \ |
| 41 | : \ |
| 42 | : "i"(MSR_IE) \ |
| 43 | : "memory"); \ |
| 44 | } while (0) |
| 45 | |
| 46 | # else /* CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR == 0 */ |
| 47 | |
| 48 | # define local_irq_save(flags) \ |
| 49 | do { \ |
| 50 | register unsigned tmp; \ |
| 51 | asm volatile ("# local_irq_save \n\t" \ |
| 52 | "mfs %0, rmsr \n\t" \ |
| 53 | "nop \n\t" \ |
| 54 | "andi %1, %0, %2 \n\t" \ |
| 55 | "mts rmsr, %1 \n\t" \ |
| 56 | "nop \n\t" \ |
| 57 | : "=r"(flags), "=r" (tmp) \ |
| 58 | : "i"(~MSR_IE) \ |
| 59 | : "memory"); \ |
| 60 | } while (0) |
| 61 | |
| 62 | # define local_irq_disable() \ |
| 63 | do { \ |
| 64 | register unsigned tmp; \ |
| 65 | asm volatile ("# local_irq_disable \n\t" \ |
| 66 | "mfs %0, rmsr \n\t" \ |
| 67 | "nop \n\t" \ |
| 68 | "andi %0, %0, %1 \n\t" \ |
| 69 | "mts rmsr, %0 \n\t" \ |
| 70 | "nop \n\t" \ |
| 71 | : "=r"(tmp) \ |
| 72 | : "i"(~MSR_IE) \ |
| 73 | : "memory"); \ |
| 74 | } while (0) |
| 75 | |
| 76 | # define local_irq_enable() \ |
| 77 | do { \ |
| 78 | register unsigned tmp; \ |
| 79 | asm volatile ("# local_irq_enable \n\t" \ |
| 80 | "mfs %0, rmsr \n\t" \ |
| 81 | "nop \n\t" \ |
| 82 | "ori %0, %0, %1 \n\t" \ |
| 83 | "mts rmsr, %0 \n\t" \ |
| 84 | "nop \n\t" \ |
| 85 | : "=r"(tmp) \ |
| 86 | : "i"(MSR_IE) \ |
| 87 | : "memory"); \ |
| 88 | } while (0) |
| 89 | |
| 90 | # endif /* CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */ |
| 91 | |
| 92 | #define local_save_flags(flags) \ |
| 93 | do { \ |
| 94 | asm volatile ("# local_save_flags \n\t" \ |
| 95 | "mfs %0, rmsr \n\t" \ |
| 96 | "nop \n\t" \ |
| 97 | : "=r"(flags) \ |
| 98 | : \ |
| 99 | : "memory"); \ |
| 100 | } while (0) |
| 101 | |
| 102 | #define local_irq_restore(flags) \ |
| 103 | do { \ |
| 104 | asm volatile ("# local_irq_restore \n\t"\ |
| 105 | "mts rmsr, %0 \n\t" \ |
| 106 | "nop \n\t" \ |
| 107 | : \ |
| 108 | : "r"(flags) \ |
| 109 | : "memory"); \ |
| 110 | } while (0) |
| 111 | |
| 112 | static inline int irqs_disabled(void) |
| 113 | { |
| 114 | unsigned long flags; |
| 115 | |
| 116 | local_save_flags(flags); |
| 117 | return ((flags & MSR_IE) == 0); |
| 118 | } |
| 119 | |
| 120 | #define raw_irqs_disabled irqs_disabled |
| 121 | #define raw_irqs_disabled_flags(flags) ((flags) == 0) |
| 122 | |
| 123 | #endif /* _ASM_MICROBLAZE_IRQFLAGS_H */ |