arch/arm/include/asm/irqflags.h

   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
  13 #define raw_local_irq_save(x)                                   \
  14         ({                                                      \
  15         __asm__ __volatile__(                                   \
  16         "mrs    %0, cpsr                @ local_irq_save\n"     \
  17         "cpsid  i"                                              \
  18         : "=r" (x) : : "memory", "cc");                         \
  19         })
  20
  21 #define raw_local_irq_enable()  __asm__("cpsie i        @ __sti" : : : "memory", "cc")
  22 #define raw_local_irq_disable() __asm__("cpsid i        @ __cli" : : : "memory", "cc")
  23 #define local_fiq_enable()  __asm__("cpsie f    @ __stf" : : : "memory", "cc")
  24 #define local_fiq_disable() __asm__("cpsid f    @ __clf" : : : "memory", "cc")
  25
  26 #else
  27
  28 /*
  29  * Save the current interrupt enable state & disable IRQs
  30  */
  31 #define raw_local_irq_save(x)                                   \
  32         ({                                                      \
  33                 unsigned long temp;                             \
  34                 (void) (&temp == &x);                           \
  35         __asm__ __volatile__(                                   \
  36         "mrs    %0, cpsr                @ local_irq_save\n"     \
  37 "       orr     %1, %0, #128\n"                                 \
  38 "       msr     cpsr_c, %1"                                     \
  39         : "=r" (x), "=r" (temp)                                 \
  40         :                                                       \
  41         : "memory", "cc");                                      \
  42         })
  43
  44 /*
  45  * Enable IRQs
  46  */
  47 #define raw_local_irq_enable()                                  \
  48         ({                                                      \
  49                 unsigned long temp;                             \
  50         __asm__ __volatile__(                                   \
  51         "mrs    %0, cpsr                @ local_irq_enable\n"   \
  52 "       bic     %0, %0, #128\n"                                 \
  53 "       msr     cpsr_c, %0"                                     \
  54         : "=r" (temp)                                           \
  55         :                                                       \
  56         : "memory", "cc");                                      \
  57         })
  58
  59 /*
  60  * Disable IRQs
  61  */
  62 #define raw_local_irq_disable()                                 \
  63         ({                                                      \
  64                 unsigned long temp;                             \
  65         __asm__ __volatile__(                                   \
  66         "mrs    %0, cpsr                @ local_irq_disable\n"  \
  67 "       orr     %0, %0, #128\n"                                 \
  68 "       msr     cpsr_c, %0"                                     \
  69         : "=r" (temp)                                           \
  70         :                                                       \
  71         : "memory", "cc");                                      \
  72         })
  73
  74 /*
  75  * Enable FIQs
  76  */
  77 #define local_fiq_enable()                                      \
  78         ({                                                      \
  79                 unsigned long temp;                             \
  80         __asm__ __volatile__(                                   \
  81         "mrs    %0, cpsr                @ stf\n"                \
  82 "       bic     %0, %0, #64\n"                                  \
  83 "       msr     cpsr_c, %0"                                     \
  84         : "=r" (temp)                                           \
  85         :                                                       \
  86         : "memory", "cc");                                      \
  87         })
  88
  89 /*
  90  * Disable FIQs
  91  */
  92 #define local_fiq_disable()                                     \
  93         ({                                                      \
  94                 unsigned long temp;                             \
  95         __asm__ __volatile__(                                   \
  96         "mrs    %0, cpsr                @ clf\n"                \
  97 "       orr     %0, %0, #64\n"                                  \
  98 "       msr     cpsr_c, %0"                                     \
  99         : "=r" (temp)                                           \
 100         :                                                       \
 101         : "memory", "cc");                                      \
 102         })
 103
 104 #endif
 105
 106 /*
 107  * Save the current interrupt enable state.
 108  */
 109 #define raw_local_save_flags(x)                                 \
 110         ({                                                      \
 111         __asm__ __volatile__(                                   \
 112         "mrs    %0, cpsr                @ local_save_flags"     \
 113         : "=r" (x) : : "memory", "cc");                         \
 114         })
 115
 116 /*
 117  * restore saved IRQ & FIQ state
 118  */
 119 #define raw_local_irq_restore(x)                                \
 120         __asm__ __volatile__(                                   \
 121         "msr    cpsr_c, %0              @ local_irq_restore\n"  \
 122         :                                                       \
 123         : "r" (x)                                               \
 124         : "memory", "cc")
 125
 126 #define raw_irqs_disabled_flags(flags)  \
 127 ({                                      \
 128         (int)((flags) & PSR_I_BIT);     \
 129 })
 130
 131 #endif
 132 #endif