| Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (C) 2006 Atmark Techno, Inc. |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 4 | */ |
| 5 | |
| 6 | #ifndef _ASM_MICROBLAZE_IRQFLAGS_H |
| 7 | #define _ASM_MICROBLAZE_IRQFLAGS_H |
| 8 | |
| 9 | #include <linux/types.h> |
| 10 | #include <asm/registers.h> |
| 11 | |
| 12 | #if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR |
| 13 | |
| 14 | static inline notrace unsigned long arch_local_irq_save(void) |
| 15 | { |
| 16 | unsigned long flags; |
| 17 | asm volatile(" msrclr %0, %1 \n" |
| 18 | " nop \n" |
| 19 | : "=r"(flags) |
| 20 | : "i"(MSR_IE) |
| 21 | : "memory"); |
| 22 | return flags; |
| 23 | } |
| 24 | |
| 25 | static inline notrace void arch_local_irq_disable(void) |
| 26 | { |
| 27 | /* this uses r0 without declaring it - is that correct? */ |
| 28 | asm volatile(" msrclr r0, %0 \n" |
| 29 | " nop \n" |
| 30 | : |
| 31 | : "i"(MSR_IE) |
| 32 | : "memory"); |
| 33 | } |
| 34 | |
| 35 | static inline notrace void arch_local_irq_enable(void) |
| 36 | { |
| 37 | /* this uses r0 without declaring it - is that correct? */ |
| 38 | asm volatile(" msrset r0, %0 \n" |
| 39 | " nop \n" |
| 40 | : |
| 41 | : "i"(MSR_IE) |
| 42 | : "memory"); |
| 43 | } |
| 44 | |
| 45 | #else /* !CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */ |
| 46 | |
| 47 | static inline notrace unsigned long arch_local_irq_save(void) |
| 48 | { |
| 49 | unsigned long flags, tmp; |
| 50 | asm volatile (" mfs %0, rmsr \n" |
| 51 | " nop \n" |
| 52 | " andi %1, %0, %2 \n" |
| 53 | " mts rmsr, %1 \n" |
| 54 | " nop \n" |
| 55 | : "=r"(flags), "=r"(tmp) |
| 56 | : "i"(~MSR_IE) |
| 57 | : "memory"); |
| 58 | return flags; |
| 59 | } |
| 60 | |
| 61 | static inline notrace void arch_local_irq_disable(void) |
| 62 | { |
| 63 | unsigned long tmp; |
| 64 | asm volatile(" mfs %0, rmsr \n" |
| 65 | " nop \n" |
| 66 | " andi %0, %0, %1 \n" |
| 67 | " mts rmsr, %0 \n" |
| 68 | " nop \n" |
| 69 | : "=r"(tmp) |
| 70 | : "i"(~MSR_IE) |
| 71 | : "memory"); |
| 72 | } |
| 73 | |
| 74 | static inline notrace void arch_local_irq_enable(void) |
| 75 | { |
| 76 | unsigned long tmp; |
| 77 | asm volatile(" mfs %0, rmsr \n" |
| 78 | " nop \n" |
| 79 | " ori %0, %0, %1 \n" |
| 80 | " mts rmsr, %0 \n" |
| 81 | " nop \n" |
| 82 | : "=r"(tmp) |
| 83 | : "i"(MSR_IE) |
| 84 | : "memory"); |
| 85 | } |
| 86 | |
| 87 | #endif /* CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */ |
| 88 | |
| 89 | static inline notrace unsigned long arch_local_save_flags(void) |
| 90 | { |
| 91 | unsigned long flags; |
| 92 | asm volatile(" mfs %0, rmsr \n" |
| 93 | " nop \n" |
| 94 | : "=r"(flags) |
| 95 | : |
| 96 | : "memory"); |
| 97 | return flags; |
| 98 | } |
| 99 | |
| 100 | static inline notrace void arch_local_irq_restore(unsigned long flags) |
| 101 | { |
| 102 | asm volatile(" mts rmsr, %0 \n" |
| 103 | " nop \n" |
| 104 | : |
| 105 | : "r"(flags) |
| 106 | : "memory"); |
| 107 | } |
| 108 | |
| 109 | static inline notrace bool arch_irqs_disabled_flags(unsigned long flags) |
| 110 | { |
| 111 | return (flags & MSR_IE) == 0; |
| 112 | } |
| 113 | |
| 114 | static inline notrace bool arch_irqs_disabled(void) |
| 115 | { |
| 116 | return arch_irqs_disabled_flags(arch_local_save_flags()); |
| 117 | } |
| 118 | |
| 119 | #endif /* _ASM_MICROBLAZE_IRQFLAGS_H */ |