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  1. #ifndef _LINUX_KERNEL_H
  2. #define _LINUX_KERNEL_H
  3.  
  4. /*
  5.  * 'kernel.h' contains some often-used function prototypes etc
  6.  */
  7.  
  8. #ifdef __KERNEL__
  9.  
  10. #include <stdarg.h>
  11. #include <linux/stddef.h>
  12. #include <linux/types.h>
  13. #include <linux/compiler.h>
  14.  
  15. #define USHORT_MAX  ((u16)(~0U))
  16. #define SHORT_MAX   ((s16)(USHORT_MAX>>1))
  17. #define SHORT_MIN   (-SHORT_MAX - 1)
  18. #define INT_MAX     ((int)(~0U>>1))
  19. #define INT_MIN     (-INT_MAX - 1)
  20. #define UINT_MAX    (~0U)
  21. #define LONG_MAX    ((long)(~0UL>>1))
  22. #define LONG_MIN    (-LONG_MAX - 1)
  23. #define ULONG_MAX   (~0UL)
  24. #define LLONG_MAX   ((long long)(~0ULL>>1))
  25. #define LLONG_MIN   (-LLONG_MAX - 1)
  26. #define ULLONG_MAX  (~0ULL)
  27.  
  28. #define ALIGN(x,a)      __ALIGN_MASK(x,(typeof(x))(a)-1)
  29. #define __ALIGN_MASK(x,mask)    (((x)+(mask))&~(mask))
  30. #define PTR_ALIGN(p, a)     ((typeof(p))ALIGN((unsigned long)(p), (a)))
  31. #define IS_ALIGNED(x, a)        (((x) & ((typeof(x))(a) - 1)) == 0)
  32.  
  33. /**
  34.  * upper_32_bits - return bits 32-63 of a number
  35.  * @n: the number we're accessing
  36.  *
  37.  * A basic shift-right of a 64- or 32-bit quantity.  Use this to suppress
  38.  * the "right shift count >= width of type" warning when that quantity is
  39.  * 32-bits.
  40.  */
  41. #define upper_32_bits(n) ((u32)(((n) >> 16) >> 16))
  42.  
  43. /**
  44.  * lower_32_bits - return bits 0-31 of a number
  45.  * @n: the number we're accessing
  46.  */
  47. #define lower_32_bits(n) ((u32)(n))
  48.  
  49.  
  50. #define KERN_EMERG      "<0>"   /* system is unusable                   */
  51. #define KERN_ALERT      "<1>"   /* action must be taken immediately     */
  52. #define KERN_CRIT       "<2>"   /* critical conditions                  */
  53. #define KERN_ERR        "<3>"   /* error conditions                     */
  54. #define KERN_WARNING    "<4>"   /* warning conditions                   */
  55. #define KERN_NOTICE     "<5>"   /* normal but significant condition     */
  56. #define KERN_INFO       "<6>"   /* informational                        */
  57. #define KERN_DEBUG      "<7>"   /* debug-level messages                 */
  58.  
  59. //int printk(const char *fmt, ...);
  60.  
  61. #define printk(fmt, arg...)    dbgprintf(fmt , ##arg)
  62.  
  63.  
  64. /*
  65.  * min()/max()/clamp() macros that also do
  66.  * strict type-checking.. See the
  67.  * "unnecessary" pointer comparison.
  68.  */
  69. #define min(x, y) ({                \
  70.     typeof(x) _min1 = (x);          \
  71.     typeof(y) _min2 = (y);          \
  72.     (void) (&_min1 == &_min2);      \
  73.     _min1 < _min2 ? _min1 : _min2; })
  74.  
  75. #define max(x, y) ({                \
  76.     typeof(x) _max1 = (x);          \
  77.     typeof(y) _max2 = (y);          \
  78.     (void) (&_max1 == &_max2);      \
  79.     _max1 > _max2 ? _max1 : _max2; })
  80.  
  81. /*
  82.  * ..and if you can't take the strict
  83.  * types, you can specify one yourself.
  84.  *
  85.  * Or not use min/max/clamp at all, of course.
  86.  */
  87. #define min_t(type, x, y) ({            \
  88.     type __min1 = (x);          \
  89.     type __min2 = (y);          \
  90.     __min1 < __min2 ? __min1: __min2; })
  91.  
  92. #define max_t(type, x, y) ({            \
  93.     type __max1 = (x);          \
  94.     type __max2 = (y);          \
  95.     __max1 > __max2 ? __max1: __max2; })
  96.  
  97. /**
  98.  * container_of - cast a member of a structure out to the containing structure
  99.  * @ptr:    the pointer to the member.
  100.  * @type:   the type of the container struct this is embedded in.
  101.  * @member: the name of the member within the struct.
  102.  *
  103.  */
  104. #define container_of(ptr, type, member) ({          \
  105.     const typeof( ((type *)0)->member ) *__mptr = (ptr);    \
  106.     (type *)( (char *)__mptr - offsetof(type,member) );})
  107.  
  108.  
  109. static inline void *kcalloc(size_t n, size_t size, uint32_t flags)
  110. {
  111.         if (n != 0 && size > ULONG_MAX / n)
  112.                 return NULL;
  113.         return kzalloc(n * size, 0);
  114. }
  115.  
  116. void free (void *ptr);
  117.  
  118. #endif /* __KERNEL__ */
  119.  
  120. typedef unsigned long   pgprotval_t;
  121.  
  122. typedef struct pgprot { pgprotval_t pgprot; } pgprot_t;
  123.  
  124. struct file {};
  125. struct vm_area_struct {};
  126. struct address_space {};
  127.  
  128. struct device
  129. {
  130.     struct device   *parent;
  131.     void            *driver_data;
  132. };
  133.  
  134. static inline void dev_set_drvdata(struct device *dev, void *data)
  135. {
  136.     dev->driver_data = data;
  137. }
  138.  
  139. static inline void *dev_get_drvdata(struct device *dev)
  140. {
  141.     return dev->driver_data;
  142. }
  143.  
  144. #define preempt_disable()       do { } while (0)
  145. #define preempt_enable_no_resched() do { } while (0)
  146. #define preempt_enable()        do { } while (0)
  147. #define preempt_check_resched()     do { } while (0)
  148.  
  149. #define preempt_disable_notrace()       do { } while (0)
  150. #define preempt_enable_no_resched_notrace() do { } while (0)
  151. #define preempt_enable_notrace()        do { } while (0)
  152.  
  153.  
  154. #endif
  155.  
  156.