Russell King | 7ad1bcb | 2006-08-27 12:07:02 +0100 | [diff] [blame] | 1 | #ifndef __ASM_ARM_IRQFLAGS_H |
| 2 | #define __ASM_ARM_IRQFLAGS_H |
| 3 | |
| 4 | #ifdef __KERNEL__ |
| 5 | |
| 6 | #include <asm/ptrace.h> |
| 7 | |
| 8 | /* |
| 9 | * CPU interrupt mask handling. |
| 10 | */ |
| 11 | #if __LINUX_ARM_ARCH__ >= 6 |
| 12 | |
David Howells | df9ee29 | 2010-10-07 14:08:55 +0100 | [diff] [blame^] | 13 | static inline unsigned long arch_local_irq_save(void) |
| 14 | { |
| 15 | unsigned long flags; |
Russell King | 7ad1bcb | 2006-08-27 12:07:02 +0100 | [diff] [blame] | 16 | |
David Howells | df9ee29 | 2010-10-07 14:08:55 +0100 | [diff] [blame^] | 17 | asm volatile( |
| 18 | " mrs %0, cpsr @ arch_local_irq_save\n" |
| 19 | " cpsid i" |
| 20 | : "=r" (flags) : : "memory", "cc"); |
| 21 | return flags; |
| 22 | } |
| 23 | |
| 24 | static inline void arch_local_irq_enable(void) |
| 25 | { |
| 26 | asm volatile( |
| 27 | " cpsie i @ arch_local_irq_enable" |
| 28 | : |
| 29 | : |
| 30 | : "memory", "cc"); |
| 31 | } |
| 32 | |
| 33 | static inline void arch_local_irq_disable(void) |
| 34 | { |
| 35 | asm volatile( |
| 36 | " cpsid i @ arch_local_irq_disable" |
| 37 | : |
| 38 | : |
| 39 | : "memory", "cc"); |
| 40 | } |
| 41 | |
Russell King | 7ad1bcb | 2006-08-27 12:07:02 +0100 | [diff] [blame] | 42 | #define local_fiq_enable() __asm__("cpsie f @ __stf" : : : "memory", "cc") |
| 43 | #define local_fiq_disable() __asm__("cpsid f @ __clf" : : : "memory", "cc") |
Russell King | 7ad1bcb | 2006-08-27 12:07:02 +0100 | [diff] [blame] | 44 | #else |
| 45 | |
| 46 | /* |
| 47 | * Save the current interrupt enable state & disable IRQs |
| 48 | */ |
David Howells | df9ee29 | 2010-10-07 14:08:55 +0100 | [diff] [blame^] | 49 | static inline unsigned long arch_local_irq_save(void) |
| 50 | { |
| 51 | unsigned long flags, temp; |
| 52 | |
| 53 | asm volatile( |
| 54 | " mrs %0, cpsr @ arch_local_irq_save\n" |
| 55 | " orr %1, %0, #128\n" |
| 56 | " msr cpsr_c, %1" |
| 57 | : "=r" (flags), "=r" (temp) |
| 58 | : |
| 59 | : "memory", "cc"); |
| 60 | return flags; |
| 61 | } |
| 62 | |
Russell King | 7ad1bcb | 2006-08-27 12:07:02 +0100 | [diff] [blame] | 63 | /* |
| 64 | * Enable IRQs |
| 65 | */ |
David Howells | df9ee29 | 2010-10-07 14:08:55 +0100 | [diff] [blame^] | 66 | static inline void arch_local_irq_enable(void) |
| 67 | { |
| 68 | unsigned long temp; |
| 69 | asm volatile( |
| 70 | " mrs %0, cpsr @ arch_local_irq_enable\n" |
| 71 | " bic %0, %0, #128\n" |
| 72 | " msr cpsr_c, %0" |
| 73 | : "=r" (temp) |
| 74 | : |
| 75 | : "memory", "cc"); |
| 76 | } |
Russell King | 7ad1bcb | 2006-08-27 12:07:02 +0100 | [diff] [blame] | 77 | |
| 78 | /* |
| 79 | * Disable IRQs |
| 80 | */ |
David Howells | df9ee29 | 2010-10-07 14:08:55 +0100 | [diff] [blame^] | 81 | static inline void arch_local_irq_disable(void) |
| 82 | { |
| 83 | unsigned long temp; |
| 84 | asm volatile( |
| 85 | " mrs %0, cpsr @ arch_local_irq_disable\n" |
| 86 | " orr %0, %0, #128\n" |
| 87 | " msr cpsr_c, %0" |
| 88 | : "=r" (temp) |
| 89 | : |
| 90 | : "memory", "cc"); |
| 91 | } |
Russell King | 7ad1bcb | 2006-08-27 12:07:02 +0100 | [diff] [blame] | 92 | |
| 93 | /* |
| 94 | * Enable FIQs |
| 95 | */ |
| 96 | #define local_fiq_enable() \ |
| 97 | ({ \ |
| 98 | unsigned long temp; \ |
| 99 | __asm__ __volatile__( \ |
| 100 | "mrs %0, cpsr @ stf\n" \ |
| 101 | " bic %0, %0, #64\n" \ |
| 102 | " msr cpsr_c, %0" \ |
| 103 | : "=r" (temp) \ |
| 104 | : \ |
| 105 | : "memory", "cc"); \ |
| 106 | }) |
| 107 | |
| 108 | /* |
| 109 | * Disable FIQs |
| 110 | */ |
| 111 | #define local_fiq_disable() \ |
| 112 | ({ \ |
| 113 | unsigned long temp; \ |
| 114 | __asm__ __volatile__( \ |
| 115 | "mrs %0, cpsr @ clf\n" \ |
| 116 | " orr %0, %0, #64\n" \ |
| 117 | " msr cpsr_c, %0" \ |
| 118 | : "=r" (temp) \ |
| 119 | : \ |
| 120 | : "memory", "cc"); \ |
| 121 | }) |
| 122 | |
| 123 | #endif |
| 124 | |
| 125 | /* |
| 126 | * Save the current interrupt enable state. |
| 127 | */ |
David Howells | df9ee29 | 2010-10-07 14:08:55 +0100 | [diff] [blame^] | 128 | static inline unsigned long arch_local_save_flags(void) |
| 129 | { |
| 130 | unsigned long flags; |
| 131 | asm volatile( |
| 132 | " mrs %0, cpsr @ local_save_flags" |
| 133 | : "=r" (flags) : : "memory", "cc"); |
| 134 | return flags; |
| 135 | } |
Russell King | 7ad1bcb | 2006-08-27 12:07:02 +0100 | [diff] [blame] | 136 | |
| 137 | /* |
| 138 | * restore saved IRQ & FIQ state |
| 139 | */ |
David Howells | df9ee29 | 2010-10-07 14:08:55 +0100 | [diff] [blame^] | 140 | static inline void arch_local_irq_restore(unsigned long flags) |
| 141 | { |
| 142 | asm volatile( |
| 143 | " msr cpsr_c, %0 @ local_irq_restore" |
| 144 | : |
| 145 | : "r" (flags) |
| 146 | : "memory", "cc"); |
| 147 | } |
Russell King | 7ad1bcb | 2006-08-27 12:07:02 +0100 | [diff] [blame] | 148 | |
David Howells | df9ee29 | 2010-10-07 14:08:55 +0100 | [diff] [blame^] | 149 | static inline int arch_irqs_disabled_flags(unsigned long flags) |
| 150 | { |
| 151 | return flags & PSR_I_BIT; |
| 152 | } |
Russell King | 7ad1bcb | 2006-08-27 12:07:02 +0100 | [diff] [blame] | 153 | |
| 154 | #endif |
| 155 | #endif |