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C/C++ Source or Header  |  2008-12-24  |  2.6 KB  |  133 lines
  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
  133.