226 lines
6.5 KiB
C
226 lines
6.5 KiB
C
#ifndef _LINUX_KERNEL_H
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#define _LINUX_KERNEL_H
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/*
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* 'kernel.h' contains some often-used function prototypes etc
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*/
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#ifdef __KERNEL__
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#include <stdarg.h>
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#include <linux/stddef.h>
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#include <linux/types.h>
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#include <linux/compiler.h>
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#include <linux/bitops.h>
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#define USHRT_MAX ((u16)(~0U))
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#define SHRT_MAX ((s16)(USHRT_MAX>>1))
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#define SHRT_MIN ((s16)(-SHRT_MAX - 1))
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#define INT_MAX ((int)(~0U>>1))
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#define INT_MIN (-INT_MAX - 1)
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#define UINT_MAX (~0U)
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#define LONG_MAX ((long)(~0UL>>1))
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#define LONG_MIN (-LONG_MAX - 1)
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#define ULONG_MAX (~0UL)
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#define LLONG_MAX ((long long)(~0ULL>>1))
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#define LLONG_MIN (-LLONG_MAX - 1)
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#define ULLONG_MAX (~0ULL)
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#define ALIGN(x,a) __ALIGN_MASK(x,(typeof(x))(a)-1)
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#define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask))
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#define PTR_ALIGN(p, a) ((typeof(p))ALIGN((unsigned long)(p), (a)))
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#define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0)
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/**
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* upper_32_bits - return bits 32-63 of a number
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* @n: the number we're accessing
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*
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* A basic shift-right of a 64- or 32-bit quantity. Use this to suppress
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* the "right shift count >= width of type" warning when that quantity is
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* 32-bits.
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*/
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#define upper_32_bits(n) ((u32)(((n) >> 16) >> 16))
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/**
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* lower_32_bits - return bits 0-31 of a number
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* @n: the number we're accessing
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*/
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#define lower_32_bits(n) ((u32)(n))
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#define KERN_EMERG "<0>" /* system is unusable */
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#define KERN_ALERT "<1>" /* action must be taken immediately */
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#define KERN_CRIT "<2>" /* critical conditions */
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#define KERN_ERR "<3>" /* error conditions */
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#define KERN_WARNING "<4>" /* warning conditions */
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#define KERN_NOTICE "<5>" /* normal but significant condition */
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#define KERN_INFO "<6>" /* informational */
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#define KERN_DEBUG "<7>" /* debug-level messages */
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extern const char hex_asc[];
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#define hex_asc_lo(x) hex_asc[((x) & 0x0f)]
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#define hex_asc_hi(x) hex_asc[((x) & 0xf0) >> 4]
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static inline char *pack_hex_byte(char *buf, u8 byte)
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{
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*buf++ = hex_asc_hi(byte);
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*buf++ = hex_asc_lo(byte);
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return buf;
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}
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extern int hex_to_bin(char ch);
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extern void hex2bin(u8 *dst, const char *src, size_t count);
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//int printk(const char *fmt, ...);
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#define printk(fmt, arg...) dbgprintf(fmt , ##arg)
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/*
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* min()/max()/clamp() macros that also do
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* strict type-checking.. See the
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* "unnecessary" pointer comparison.
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*/
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#define min(x, y) ({ \
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typeof(x) _min1 = (x); \
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typeof(y) _min2 = (y); \
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(void) (&_min1 == &_min2); \
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_min1 < _min2 ? _min1 : _min2; })
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#define max(x, y) ({ \
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typeof(x) _max1 = (x); \
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typeof(y) _max2 = (y); \
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(void) (&_max1 == &_max2); \
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_max1 > _max2 ? _max1 : _max2; })
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#define min3(x, y, z) ({ \
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typeof(x) _min1 = (x); \
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typeof(y) _min2 = (y); \
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typeof(z) _min3 = (z); \
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(void) (&_min1 == &_min2); \
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(void) (&_min1 == &_min3); \
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_min1 < _min2 ? (_min1 < _min3 ? _min1 : _min3) : \
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(_min2 < _min3 ? _min2 : _min3); })
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#define max3(x, y, z) ({ \
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typeof(x) _max1 = (x); \
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typeof(y) _max2 = (y); \
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typeof(z) _max3 = (z); \
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(void) (&_max1 == &_max2); \
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(void) (&_max1 == &_max3); \
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_max1 > _max2 ? (_max1 > _max3 ? _max1 : _max3) : \
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(_max2 > _max3 ? _max2 : _max3); })
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/**
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* min_not_zero - return the minimum that is _not_ zero, unless both are zero
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* @x: value1
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* @y: value2
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*/
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#define min_not_zero(x, y) ({ \
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typeof(x) __x = (x); \
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typeof(y) __y = (y); \
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__x == 0 ? __y : ((__y == 0) ? __x : min(__x, __y)); })
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/**
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* clamp - return a value clamped to a given range with strict typechecking
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* @val: current value
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* @min: minimum allowable value
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* @max: maximum allowable value
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*
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* This macro does strict typechecking of min/max to make sure they are of the
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* same type as val. See the unnecessary pointer comparisons.
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*/
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#define clamp(val, min, max) ({ \
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typeof(val) __val = (val); \
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typeof(min) __min = (min); \
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typeof(max) __max = (max); \
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(void) (&__val == &__min); \
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(void) (&__val == &__max); \
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__val = __val < __min ? __min: __val; \
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__val > __max ? __max: __val; })
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/*
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* ..and if you can't take the strict
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* types, you can specify one yourself.
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*
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* Or not use min/max/clamp at all, of course.
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*/
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#define min_t(type, x, y) ({ \
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type __min1 = (x); \
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type __min2 = (y); \
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__min1 < __min2 ? __min1: __min2; })
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#define max_t(type, x, y) ({ \
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type __max1 = (x); \
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type __max2 = (y); \
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__max1 > __max2 ? __max1: __max2; })
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/**
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* container_of - cast a member of a structure out to the containing structure
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* @ptr: the pointer to the member.
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* @type: the type of the container struct this is embedded in.
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* @member: the name of the member within the struct.
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*
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*/
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#define container_of(ptr, type, member) ({ \
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const typeof( ((type *)0)->member ) *__mptr = (ptr); \
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(type *)( (char *)__mptr - offsetof(type,member) );})
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static inline void *kcalloc(size_t n, size_t size, uint32_t flags)
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{
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if (n != 0 && size > ULONG_MAX / n)
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return NULL;
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return kzalloc(n * size, 0);
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}
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void free (void *ptr);
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#endif /* __KERNEL__ */
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typedef unsigned long pgprotval_t;
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typedef struct pgprot { pgprotval_t pgprot; } pgprot_t;
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struct file {};
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struct vm_area_struct {};
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struct address_space {};
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struct device
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{
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struct device *parent;
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void *driver_data;
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};
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static inline void dev_set_drvdata(struct device *dev, void *data)
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{
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dev->driver_data = data;
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}
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static inline void *dev_get_drvdata(struct device *dev)
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{
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return dev->driver_data;
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}
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#define preempt_disable() do { } while (0)
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#define preempt_enable_no_resched() do { } while (0)
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#define preempt_enable() do { } while (0)
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#define preempt_check_resched() do { } while (0)
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#define preempt_disable_notrace() do { } while (0)
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#define preempt_enable_no_resched_notrace() do { } while (0)
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#define preempt_enable_notrace() do { } while (0)
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#define in_dbg_master() (0)
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#define HZ 100
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#define time_after(a,b) \
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(typecheck(unsigned long, a) && \
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typecheck(unsigned long, b) && \
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((long)(b) - (long)(a) < 0))
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#endif
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