projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 6bc9a396 CL |
2 | #ifndef _ASM_SCORE_IRQFLAGS_H |
| 3 | #define _ASM_SCORE_IRQFLAGS_H | |
| 4 | ||
| 5 | #ifndef __ASSEMBLY__ | |
| 6 | ||
| df9ee292 DH |
7 | #include <linux/types.h> |
| 8 | ||
| 9 | static inline unsigned long arch_local_save_flags(void) | |
| 10 | { | |
| 11 | unsigned long flags; | |
| 12 | ||
| 13 | asm volatile( | |
| 14 | " mfcr r8, cr0 \n" | |
| 15 | " nop \n" | |
| 16 | " nop \n" | |
| 17 | " mv %0, r8 \n" | |
| 18 | " nop \n" | |
| 19 | " nop \n" | |
| 20 | " nop \n" | |
| 21 | " nop \n" | |
| 22 | " nop \n" | |
| 23 | " ldi r9, 0x1 \n" | |
| 24 | " and %0, %0, r9 \n" | |
| 25 | : "=r" (flags) | |
| 26 | : | |
| 27 | : "r8", "r9"); | |
| 28 | return flags; | |
| 6bc9a396 CL |
29 | } |
| 30 | ||
| df9ee292 DH |
31 | static inline unsigned long arch_local_irq_save(void) |
| 32 | { | |
| fa73c5bf | 33 | unsigned long flags; |
| df9ee292 DH |
34 | |
| 35 | asm volatile( | |
| 36 | " mfcr r8, cr0 \n" | |
| 37 | " li r9, 0xfffffffe \n" | |
| 38 | " nop \n" | |
| 39 | " mv %0, r8 \n" | |
| 40 | " and r8, r8, r9 \n" | |
| 41 | " mtcr r8, cr0 \n" | |
| 42 | " nop \n" | |
| 43 | " nop \n" | |
| 44 | " nop \n" | |
| 45 | " nop \n" | |
| 46 | " nop \n" | |
| 47 | : "=r" (flags) | |
| 48 | : | |
| 49 | : "r8", "r9", "memory"); | |
| 50 | ||
| 51 | return flags; | |
| 6bc9a396 CL |
52 | } |
| 53 | ||
| df9ee292 DH |
54 | static inline void arch_local_irq_restore(unsigned long flags) |
| 55 | { | |
| 56 | asm volatile( | |
| 57 | " mfcr r8, cr0 \n" | |
| 58 | " ldi r9, 0x1 \n" | |
| 59 | " and %0, %0, r9 \n" | |
| 60 | " or r8, r8, %0 \n" | |
| 61 | " mtcr r8, cr0 \n" | |
| 62 | " nop \n" | |
| 63 | " nop \n" | |
| 64 | " nop \n" | |
| 65 | " nop \n" | |
| 66 | " nop \n" | |
| 67 | : | |
| 68 | : "r"(flags) | |
| 69 | : "r8", "r9", "memory"); | |
| 6bc9a396 CL |
70 | } |
| 71 | ||
| df9ee292 DH |
72 | static inline void arch_local_irq_enable(void) |
| 73 | { | |
| 74 | asm volatile( | |
| 75 | " mfcr r8,cr0 \n" | |
| 76 | " nop \n" | |
| 77 | " nop \n" | |
| 78 | " ori r8,0x1 \n" | |
| 79 | " mtcr r8,cr0 \n" | |
| 80 | " nop \n" | |
| 81 | " nop \n" | |
| 82 | " nop \n" | |
| 83 | " nop \n" | |
| 84 | " nop \n" | |
| 85 | : | |
| 86 | : | |
| 87 | : "r8", "memory"); | |
| 6bc9a396 CL |
88 | } |
| 89 | ||
| df9ee292 DH |
90 | static inline void arch_local_irq_disable(void) |
| 91 | { | |
| 92 | asm volatile( | |
| 93 | " mfcr r8,cr0 \n" | |
| 94 | " nop \n" | |
| 95 | " nop \n" | |
| 96 | " srli r8,r8,1 \n" | |
| 97 | " slli r8,r8,1 \n" | |
| 98 | " mtcr r8,cr0 \n" | |
| 99 | " nop \n" | |
| 100 | " nop \n" | |
| 101 | " nop \n" | |
| 102 | " nop \n" | |
| 103 | " nop \n" | |
| 104 | : | |
| 105 | : | |
| 106 | : "r8", "memory"); | |
| 6bc9a396 CL |
107 | } |
| 108 | ||
| df9ee292 | 109 | static inline bool arch_irqs_disabled_flags(unsigned long flags) |
| 6bc9a396 CL |
110 | { |
| 111 | return !(flags & 1); | |
| 112 | } | |
| 113 | ||
| df9ee292 DH |
114 | static inline bool arch_irqs_disabled(void) |
| 115 | { | |
| 116 | return arch_irqs_disabled_flags(arch_local_save_flags()); | |
| 117 | } | |
| 118 | ||
| 119 | #endif /* __ASSEMBLY__ */ | |
| 6bc9a396 CL |
120 | |
| 121 | #endif /* _ASM_SCORE_IRQFLAGS_H */ |