Subversion Repositories Kolibri OS

Rev

Rev 6102 | Rev 6934 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
1408 serge 1
#ifndef _LINUX_KERNEL_H
2
#define _LINUX_KERNEL_H
3
 
4
 
5
#include 
5270 serge 6
#include 
1408 serge 7
#include 
8
#include 
9
#include 
1970 serge 10
#include 
5270 serge 11
#include 
2967 Serge 12
#include 
5270 serge 13
#include 
14
#include 
15
#include 
2967 Serge 16
 
1964 serge 17
#define USHRT_MAX	((u16)(~0U))
18
#define SHRT_MAX	((s16)(USHRT_MAX>>1))
19
#define SHRT_MIN	((s16)(-SHRT_MAX - 1))
6082 serge 20
#define INT_MAX		((int)(~0U>>1))
21
#define INT_MIN		(-INT_MAX - 1)
22
#define UINT_MAX	(~0U)
23
#define LONG_MAX	((long)(~0UL>>1))
24
#define LONG_MIN	(-LONG_MAX - 1)
25
#define ULONG_MAX	(~0UL)
26
#define LLONG_MAX	((long long)(~0ULL>>1))
27
#define LLONG_MIN	(-LLONG_MAX - 1)
28
#define ULLONG_MAX	(~0ULL)
3031 serge 29
#define SIZE_MAX	(~(size_t)0)
1408 serge 30
 
5056 serge 31
#define U8_MAX		((u8)~0U)
32
#define S8_MAX		((s8)(U8_MAX>>1))
33
#define S8_MIN		((s8)(-S8_MAX - 1))
34
#define U16_MAX		((u16)~0U)
35
#define S16_MAX		((s16)(U16_MAX>>1))
36
#define S16_MIN		((s16)(-S16_MAX - 1))
37
#define U32_MAX		((u32)~0U)
38
#define S32_MAX		((s32)(U32_MAX>>1))
39
#define S32_MIN		((s32)(-S32_MAX - 1))
40
#define U64_MAX		((u64)~0ULL)
41
#define S64_MAX		((s64)(U64_MAX>>1))
42
#define S64_MIN		((s64)(-S64_MAX - 1))
43
 
5270 serge 44
#define STACK_MAGIC	0xdeadbeef
45
 
46
#define REPEAT_BYTE(x)	((~0ul / 0xff) * (x))
47
 
48
#define ALIGN(x, a)		__ALIGN_KERNEL((x), (a))
49
#define __ALIGN_MASK(x, mask)	__ALIGN_KERNEL_MASK((x), (mask))
6082 serge 50
#define PTR_ALIGN(p, a)		((typeof(p))ALIGN((unsigned long)(p), (a)))
51
#define IS_ALIGNED(x, a)		(((x) & ((typeof(x))(a) - 1)) == 0)
1408 serge 52
 
4559 Serge 53
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
3747 Serge 54
 
4559 Serge 55
/*
56
 * This looks more complex than it should be. But we need to
57
 * get the type for the ~ right in round_down (it needs to be
58
 * as wide as the result!), and we want to evaluate the macro
59
 * arguments just once each.
60
 */
3747 Serge 61
#define __round_mask(x, y) ((__typeof__(x))((y)-1))
62
#define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1)
4559 Serge 63
#define round_down(x, y) ((x) & ~__round_mask(x, y))
3747 Serge 64
 
4559 Serge 65
#define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f))
66
#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
67
#define DIV_ROUND_UP_ULL(ll,d) \
68
	({ unsigned long long _tmp = (ll)+(d)-1; do_div(_tmp, d); _tmp; })
69
 
70
#if BITS_PER_LONG == 32
71
# define DIV_ROUND_UP_SECTOR_T(ll,d) DIV_ROUND_UP_ULL(ll, d)
72
#else
73
# define DIV_ROUND_UP_SECTOR_T(ll,d) DIV_ROUND_UP(ll,d)
74
#endif
75
 
3039 serge 76
/* The `const' in roundup() prevents gcc-3.3 from calling __divdi3 */
6082 serge 77
#define roundup(x, y) (					\
78
{							\
79
	const typeof(y) __y = y;			\
80
	(((x) + (__y - 1)) / __y) * __y;		\
81
}							\
3039 serge 82
)
4559 Serge 83
#define rounddown(x, y) (				\
84
{							\
85
	typeof(x) __x = (x);				\
86
	__x - (__x % (y));				\
87
}							\
88
)
2967 Serge 89
 
4559 Serge 90
/*
91
 * Divide positive or negative dividend by positive divisor and round
92
 * to closest integer. Result is undefined for negative divisors and
93
 * for negative dividends if the divisor variable type is unsigned.
94
 */
6082 serge 95
#define DIV_ROUND_CLOSEST(x, divisor)(			\
96
{							\
4559 Serge 97
	typeof(x) __x = x;				\
98
	typeof(divisor) __d = divisor;			\
99
	(((typeof(x))-1) > 0 ||				\
100
	 ((typeof(divisor))-1) > 0 || (__x) > 0) ?	\
101
		(((__x) + ((__d) / 2)) / (__d)) :	\
102
		(((__x) - ((__d) / 2)) / (__d));	\
6082 serge 103
}							\
2967 Serge 104
)
6082 serge 105
/*
106
 * Same as above but for u64 dividends. divisor must be a 32-bit
107
 * number.
108
 */
109
#define DIV_ROUND_CLOSEST_ULL(x, divisor)(		\
110
{							\
111
	typeof(divisor) __d = divisor;			\
112
	unsigned long long _tmp = (x) + (__d) / 2;	\
113
	do_div(_tmp, __d);				\
114
	_tmp;						\
115
}							\
116
)
2967 Serge 117
 
4559 Serge 118
/*
119
 * Multiplies an integer by a fraction, while avoiding unnecessary
120
 * overflow or loss of precision.
121
 */
122
#define mult_frac(x, numer, denom)(			\
123
{							\
124
	typeof(x) quot = (x) / (denom);			\
125
	typeof(x) rem  = (x) % (denom);			\
126
	(quot * (numer)) + ((rem * (numer)) / (denom));	\
127
}							\
128
)
4103 Serge 129
 
130
 
5270 serge 131
#define _RET_IP_		(unsigned long)__builtin_return_address(0)
132
#define _THIS_IP_  ({ __label__ __here; __here: (unsigned long)&&__here; })
4103 Serge 133
 
5270 serge 134
#ifdef CONFIG_LBDAF
135
# include 
136
# define sector_div(a, b) do_div(a, b)
137
#else
138
# define sector_div(n, b)( \
139
{ \
140
	int _res; \
141
	_res = (n) % (b); \
142
	(n) /= (b); \
143
	_res; \
144
} \
145
)
146
#endif
4103 Serge 147
 
1408 serge 148
/**
149
 * upper_32_bits - return bits 32-63 of a number
150
 * @n: the number we're accessing
151
 *
152
 * A basic shift-right of a 64- or 32-bit quantity.  Use this to suppress
153
 * the "right shift count >= width of type" warning when that quantity is
154
 * 32-bits.
155
 */
156
#define upper_32_bits(n) ((u32)(((n) >> 16) >> 16))
157
 
158
/**
159
 * lower_32_bits - return bits 0-31 of a number
160
 * @n: the number we're accessing
161
 */
162
#define lower_32_bits(n) ((u32)(n))
163
 
6102 serge 164
struct completion;
165
struct pt_regs;
166
struct user;
167
 
6082 serge 168
#ifdef CONFIG_PREEMPT_VOLUNTARY
169
extern int _cond_resched(void);
170
# define might_resched() _cond_resched()
171
#else
172
# define might_resched() do { } while (0)
173
#endif
5056 serge 174
 
6082 serge 175
#ifdef CONFIG_DEBUG_ATOMIC_SLEEP
176
  void ___might_sleep(const char *file, int line, int preempt_offset);
177
  void __might_sleep(const char *file, int line, int preempt_offset);
178
/**
179
 * might_sleep - annotation for functions that can sleep
180
 *
181
 * this macro will print a stack trace if it is executed in an atomic
182
 * context (spinlock, irq-handler, ...).
183
 *
184
 * This is a useful debugging help to be able to catch problems early and not
185
 * be bitten later when the calling function happens to sleep when it is not
186
 * supposed to.
5270 serge 187
 */
6082 serge 188
# define might_sleep() \
189
	do { __might_sleep(__FILE__, __LINE__, 0); might_resched(); } while (0)
190
# define sched_annotate_sleep()	(current->task_state_change = 0)
191
#else
192
  static inline void ___might_sleep(const char *file, int line,
193
				   int preempt_offset) { }
194
  static inline void __might_sleep(const char *file, int line,
195
				   int preempt_offset) { }
196
# define might_sleep() do { might_resched(); } while (0)
197
# define sched_annotate_sleep() do { } while (0)
198
#endif
5056 serge 199
 
6082 serge 200
#define might_sleep_if(cond) do { if (cond) might_sleep(); } while (0)
5056 serge 201
 
6082 serge 202
/**
203
 * abs - return absolute value of an argument
204
 * @x: the value.  If it is unsigned type, it is converted to signed type first
205
 *   (s64, long or int depending on its size).
206
 *
207
 * Return: an absolute value of x.  If x is 64-bit, macro's return type is s64,
208
 *   otherwise it is signed long.
209
 */
210
#define abs(x) __builtin_choose_expr(sizeof(x) == sizeof(s64), ({	\
211
		s64 __x = (x);						\
212
		(__x < 0) ? -__x : __x;					\
213
	}), ({								\
214
		long ret;						\
215
		if (sizeof(x) == sizeof(long)) {			\
216
			long __x = (x);					\
217
			ret = (__x < 0) ? -__x : __x;			\
218
		} else {						\
219
			int __x = (x);					\
220
			ret = (__x < 0) ? -__x : __x;			\
221
		}							\
222
		ret;							\
223
	}))
224
 
225
/**
226
 * reciprocal_scale - "scale" a value into range [0, ep_ro)
227
 * @val: value
228
 * @ep_ro: right open interval endpoint
229
 *
230
 * Perform a "reciprocal multiplication" in order to "scale" a value into
231
 * range [0, ep_ro), where the upper interval endpoint is right-open.
232
 * This is useful, e.g. for accessing a index of an array containing
233
 * ep_ro elements, for example. Think of it as sort of modulus, only that
234
 * the result isn't that of modulo. ;) Note that if initial input is a
235
 * small value, then result will return 0.
236
 *
237
 * Return: a result based on val in interval [0, ep_ro).
238
 */
239
static inline u32 reciprocal_scale(u32 val, u32 ep_ro)
240
{
241
	return (u32)(((u64) val * ep_ro) >> 32);
242
}
243
 
244
#if defined(CONFIG_MMU) && \
245
	(defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_DEBUG_ATOMIC_SLEEP))
246
#define might_fault() __might_fault(__FILE__, __LINE__)
247
void __might_fault(const char *file, int line);
248
#else
249
static inline void might_fault(void) { }
250
#endif
251
 
1408 serge 252
#define KERN_EMERG      "<0>"   /* system is unusable                   */
253
#define KERN_ALERT      "<1>"   /* action must be taken immediately     */
254
#define KERN_CRIT       "<2>"   /* critical conditions                  */
255
#define KERN_ERR        "<3>"   /* error conditions                     */
256
#define KERN_WARNING    "<4>"   /* warning conditions                   */
257
#define KERN_NOTICE     "<5>"   /* normal but significant condition     */
258
#define KERN_INFO       "<6>"   /* informational                        */
259
#define KERN_DEBUG      "<7>"   /* debug-level messages                 */
6082 serge 260
extern unsigned long simple_strtoul(const char *,char **,unsigned int);
261
extern long simple_strtol(const char *,char **,unsigned int);
262
extern unsigned long long simple_strtoull(const char *,char **,unsigned int);
263
extern long long simple_strtoll(const char *,char **,unsigned int);
264
 
265
extern int num_to_str(char *buf, int size, unsigned long long num);
266
 
267
/* lib/printf utilities */
268
 
5270 serge 269
extern __printf(2, 3) int sprintf(char *buf, const char * fmt, ...);
270
extern __printf(2, 0) int vsprintf(char *buf, const char *, va_list);
271
extern __printf(3, 4)
272
int snprintf(char *buf, size_t size, const char *fmt, ...);
273
extern __printf(3, 0)
274
int vsnprintf(char *buf, size_t size, const char *fmt, va_list args);
275
extern __printf(3, 4)
276
int scnprintf(char *buf, size_t size, const char *fmt, ...);
277
extern __printf(3, 0)
278
int vscnprintf(char *buf, size_t size, const char *fmt, va_list args);
279
extern __printf(2, 3)
280
char *kasprintf(gfp_t gfp, const char *fmt, ...);
6082 serge 281
extern __printf(2, 0)
282
char *kvasprintf(gfp_t gfp, const char *fmt, va_list args);
283
extern __printf(2, 0)
284
const char *kvasprintf_const(gfp_t gfp, const char *fmt, va_list args);
285
 
286
extern __scanf(2, 3)
287
int sscanf(const char *, const char *, ...);
288
extern __scanf(2, 0)
289
int vsscanf(const char *, const char *, va_list);
290
extern int oops_in_progress;		/* If set, an oops, panic(), BUG() or die() is in progress */
5270 serge 291
enum lockdep_ok {
292
	LOCKDEP_STILL_OK,
293
	LOCKDEP_NOW_UNRELIABLE
294
};
295
extern void add_taint(unsigned flag, enum lockdep_ok);
296
extern int test_taint(unsigned flag);
297
extern unsigned long get_taint(void);
298
extern int root_mountflags;
299
 
300
extern bool early_boot_irqs_disabled;
301
 
302
/* Values used for system_state */
303
extern enum system_states {
304
	SYSTEM_BOOTING,
305
	SYSTEM_RUNNING,
306
	SYSTEM_HALT,
307
	SYSTEM_POWER_OFF,
308
	SYSTEM_RESTART,
309
} system_state;
310
 
311
#define TAINT_PROPRIETARY_MODULE	0
312
#define TAINT_FORCED_MODULE		1
313
#define TAINT_CPU_OUT_OF_SPEC		2
314
#define TAINT_FORCED_RMMOD		3
315
#define TAINT_MACHINE_CHECK		4
316
#define TAINT_BAD_PAGE			5
317
#define TAINT_USER			6
318
#define TAINT_DIE			7
319
#define TAINT_OVERRIDDEN_ACPI_TABLE	8
320
#define TAINT_WARN			9
321
#define TAINT_CRAP			10
322
#define TAINT_FIRMWARE_WORKAROUND	11
323
#define TAINT_OOT_MODULE		12
324
#define TAINT_UNSIGNED_MODULE		13
325
#define TAINT_SOFTLOCKUP		14
6082 serge 326
#define TAINT_LIVEPATCH			15
5270 serge 327
 
1970 serge 328
extern const char hex_asc[];
329
#define hex_asc_lo(x)	hex_asc[((x) & 0x0f)]
330
#define hex_asc_hi(x)	hex_asc[((x) & 0xf0) >> 4]
1408 serge 331
 
5270 serge 332
static inline char *hex_byte_pack(char *buf, u8 byte)
1970 serge 333
{
334
	*buf++ = hex_asc_hi(byte);
335
	*buf++ = hex_asc_lo(byte);
336
	return buf;
337
}
338
 
5270 serge 339
extern const char hex_asc_upper[];
340
#define hex_asc_upper_lo(x)	hex_asc_upper[((x) & 0x0f)]
341
#define hex_asc_upper_hi(x)	hex_asc_upper[((x) & 0xf0) >> 4]
342
 
343
static inline char *hex_byte_pack_upper(char *buf, u8 byte)
344
{
345
	*buf++ = hex_asc_upper_hi(byte);
346
	*buf++ = hex_asc_upper_lo(byte);
347
	return buf;
348
}
349
 
350
extern int hex_to_bin(char ch);
351
extern int __must_check hex2bin(u8 *dst, const char *src, size_t count);
352
extern char *bin2hex(char *dst, const void *src, size_t count);
353
 
354
bool mac_pton(const char *s, u8 *mac);
355
 
356
/*
357
 * General tracing related utility functions - trace_printk(),
358
 * tracing_on/tracing_off and tracing_start()/tracing_stop
359
 *
360
 * Use tracing_on/tracing_off when you want to quickly turn on or off
361
 * tracing. It simply enables or disables the recording of the trace events.
362
 * This also corresponds to the user space /sys/kernel/debug/tracing/tracing_on
363
 * file, which gives a means for the kernel and userspace to interact.
364
 * Place a tracing_off() in the kernel where you want tracing to end.
365
 * From user space, examine the trace, and then echo 1 > tracing_on
366
 * to continue tracing.
367
 *
368
 * tracing_stop/tracing_start has slightly more overhead. It is used
369
 * by things like suspend to ram where disabling the recording of the
370
 * trace is not enough, but tracing must actually stop because things
371
 * like calling smp_processor_id() may crash the system.
372
 *
373
 * Most likely, you want to use tracing_on/tracing_off.
374
 */
375
 
376
enum ftrace_dump_mode {
377
	DUMP_NONE,
378
	DUMP_ALL,
379
	DUMP_ORIG,
3480 Serge 380
};
1970 serge 381
 
5270 serge 382
#ifdef CONFIG_TRACING
383
void tracing_on(void);
384
void tracing_off(void);
385
int tracing_is_on(void);
386
void tracing_snapshot(void);
387
void tracing_snapshot_alloc(void);
1970 serge 388
 
5270 serge 389
extern void tracing_start(void);
390
extern void tracing_stop(void);
3480 Serge 391
 
5270 serge 392
static inline __printf(1, 2)
393
void ____trace_printk_check_format(const char *fmt, ...)
394
{
395
}
396
#define __trace_printk_check_format(fmt, args...)			\
397
do {									\
398
	if (0)								\
399
		____trace_printk_check_format(fmt, ##args);		\
400
} while (0)
1408 serge 401
 
5270 serge 402
/**
403
 * trace_printk - printf formatting in the ftrace buffer
404
 * @fmt: the printf format for printing
405
 *
406
 * Note: __trace_printk is an internal function for trace_printk and
407
 *       the @ip is passed in via the trace_printk macro.
408
 *
409
 * This function allows a kernel developer to debug fast path sections
410
 * that printk is not appropriate for. By scattering in various
411
 * printk like tracing in the code, a developer can quickly see
412
 * where problems are occurring.
413
 *
414
 * This is intended as a debugging tool for the developer only.
415
 * Please refrain from leaving trace_printks scattered around in
416
 * your code. (Extra memory is used for special buffers that are
417
 * allocated when trace_printk() is used)
418
 *
419
 * A little optization trick is done here. If there's only one
420
 * argument, there's no need to scan the string for printf formats.
421
 * The trace_puts() will suffice. But how can we take advantage of
422
 * using trace_puts() when trace_printk() has only one argument?
423
 * By stringifying the args and checking the size we can tell
424
 * whether or not there are args. __stringify((__VA_ARGS__)) will
425
 * turn into "()\0" with a size of 3 when there are no args, anything
426
 * else will be bigger. All we need to do is define a string to this,
427
 * and then take its size and compare to 3. If it's bigger, use
428
 * do_trace_printk() otherwise, optimize it to trace_puts(). Then just
429
 * let gcc optimize the rest.
430
 */
1408 serge 431
 
5270 serge 432
#define trace_printk(fmt, ...)				\
433
do {							\
434
	char _______STR[] = __stringify((__VA_ARGS__));	\
435
	if (sizeof(_______STR) > 3)			\
436
		do_trace_printk(fmt, ##__VA_ARGS__);	\
437
	else						\
438
		trace_puts(fmt);			\
439
} while (0)
440
 
441
#define do_trace_printk(fmt, args...)					\
442
do {									\
443
	static const char *trace_printk_fmt				\
444
		__attribute__((section("__trace_printk_fmt"))) =	\
445
		__builtin_constant_p(fmt) ? fmt : NULL;			\
446
									\
447
	__trace_printk_check_format(fmt, ##args);			\
448
									\
449
	if (__builtin_constant_p(fmt))					\
450
		__trace_bprintk(_THIS_IP_, trace_printk_fmt, ##args);	\
451
	else								\
452
		__trace_printk(_THIS_IP_, fmt, ##args);			\
453
} while (0)
454
 
5056 serge 455
extern __printf(2, 3)
5270 serge 456
int __trace_bprintk(unsigned long ip, const char *fmt, ...);
1408 serge 457
 
5270 serge 458
extern __printf(2, 3)
459
int __trace_printk(unsigned long ip, const char *fmt, ...);
460
 
461
/**
462
 * trace_puts - write a string into the ftrace buffer
463
 * @str: the string to record
464
 *
465
 * Note: __trace_bputs is an internal function for trace_puts and
466
 *       the @ip is passed in via the trace_puts macro.
467
 *
468
 * This is similar to trace_printk() but is made for those really fast
469
 * paths that a developer wants the least amount of "Heisenbug" affects,
470
 * where the processing of the print format is still too much.
471
 *
472
 * This function allows a kernel developer to debug fast path sections
473
 * that printk is not appropriate for. By scattering in various
474
 * printk like tracing in the code, a developer can quickly see
475
 * where problems are occurring.
476
 *
477
 * This is intended as a debugging tool for the developer only.
478
 * Please refrain from leaving trace_puts scattered around in
479
 * your code. (Extra memory is used for special buffers that are
480
 * allocated when trace_puts() is used)
481
 *
482
 * Returns: 0 if nothing was written, positive # if string was.
483
 *  (1 when __trace_bputs is used, strlen(str) when __trace_puts is used)
484
 */
485
 
486
#define trace_puts(str) ({						\
487
	static const char *trace_printk_fmt				\
488
		__attribute__((section("__trace_printk_fmt"))) =	\
489
		__builtin_constant_p(str) ? str : NULL;			\
490
									\
491
	if (__builtin_constant_p(str))					\
492
		__trace_bputs(_THIS_IP_, trace_printk_fmt);		\
493
	else								\
494
		__trace_puts(_THIS_IP_, str, strlen(str));		\
495
})
496
extern int __trace_bputs(unsigned long ip, const char *str);
497
extern int __trace_puts(unsigned long ip, const char *str, int size);
498
 
499
extern void trace_dump_stack(int skip);
500
 
1408 serge 501
/*
5270 serge 502
 * The double __builtin_constant_p is because gcc will give us an error
503
 * if we try to allocate the static variable to fmt if it is not a
504
 * constant. Even with the outer if statement.
505
 */
506
#define ftrace_vprintk(fmt, vargs)					\
507
do {									\
508
	if (__builtin_constant_p(fmt)) {				\
509
		static const char *trace_printk_fmt			\
510
		  __attribute__((section("__trace_printk_fmt"))) =	\
511
			__builtin_constant_p(fmt) ? fmt : NULL;		\
512
									\
513
		__ftrace_vbprintk(_THIS_IP_, trace_printk_fmt, vargs);	\
514
	} else								\
515
		__ftrace_vprintk(_THIS_IP_, fmt, vargs);		\
516
} while (0)
517
 
6082 serge 518
extern __printf(2, 0) int
5270 serge 519
__ftrace_vbprintk(unsigned long ip, const char *fmt, va_list ap);
520
 
6082 serge 521
extern __printf(2, 0) int
5270 serge 522
__ftrace_vprintk(unsigned long ip, const char *fmt, va_list ap);
523
 
524
extern void ftrace_dump(enum ftrace_dump_mode oops_dump_mode);
525
#else
526
static inline void tracing_start(void) { }
527
static inline void tracing_stop(void) { }
528
static inline void trace_dump_stack(int skip) { }
529
 
530
static inline void tracing_on(void) { }
531
static inline void tracing_off(void) { }
532
static inline int tracing_is_on(void) { return 0; }
533
static inline void tracing_snapshot(void) { }
534
static inline void tracing_snapshot_alloc(void) { }
535
 
536
static inline __printf(1, 2)
537
int trace_printk(const char *fmt, ...)
538
{
539
	return 0;
540
}
6082 serge 541
static __printf(1, 0) inline int
5270 serge 542
ftrace_vprintk(const char *fmt, va_list ap)
543
{
544
	return 0;
545
}
546
static inline void ftrace_dump(enum ftrace_dump_mode oops_dump_mode) { }
547
#endif /* CONFIG_TRACING */
548
 
549
/*
1408 serge 550
 * min()/max()/clamp() macros that also do
551
 * strict type-checking.. See the
552
 * "unnecessary" pointer comparison.
553
 */
6082 serge 554
#define min(x, y) ({				\
555
	typeof(x) _min1 = (x);			\
556
	typeof(y) _min2 = (y);			\
557
	(void) (&_min1 == &_min2);		\
558
	_min1 < _min2 ? _min1 : _min2; })
1408 serge 559
 
6082 serge 560
#define max(x, y) ({				\
561
	typeof(x) _max1 = (x);			\
562
	typeof(y) _max2 = (y);			\
563
	(void) (&_max1 == &_max2);		\
564
	_max1 > _max2 ? _max1 : _max2; })
1408 serge 565
 
5270 serge 566
#define min3(x, y, z) min((typeof(x))min(x, y), z)
567
#define max3(x, y, z) max((typeof(x))max(x, y), z)
1970 serge 568
 
569
/**
570
 * min_not_zero - return the minimum that is _not_ zero, unless both are zero
571
 * @x: value1
572
 * @y: value2
573
 */
574
#define min_not_zero(x, y) ({			\
575
	typeof(x) __x = (x);			\
576
	typeof(y) __y = (y);			\
577
	__x == 0 ? __y : ((__y == 0) ? __x : min(__x, __y)); })
578
 
579
/**
580
 * clamp - return a value clamped to a given range with strict typechecking
581
 * @val: current value
5270 serge 582
 * @lo: lowest allowable value
583
 * @hi: highest allowable value
1970 serge 584
 *
5270 serge 585
 * This macro does strict typechecking of lo/hi to make sure they are of the
1970 serge 586
 * same type as val.  See the unnecessary pointer comparisons.
587
 */
5270 serge 588
#define clamp(val, lo, hi) min((typeof(val))max(val, lo), hi)
1970 serge 589
 
1408 serge 590
/*
591
 * ..and if you can't take the strict
592
 * types, you can specify one yourself.
593
 *
594
 * Or not use min/max/clamp at all, of course.
595
 */
6082 serge 596
#define min_t(type, x, y) ({			\
597
	type __min1 = (x);			\
598
	type __min2 = (y);			\
599
	__min1 < __min2 ? __min1: __min2; })
1408 serge 600
 
6082 serge 601
#define max_t(type, x, y) ({			\
602
	type __max1 = (x);			\
603
	type __max2 = (y);			\
604
	__max1 > __max2 ? __max1: __max2; })
1408 serge 605
 
606
/**
5270 serge 607
 * clamp_t - return a value clamped to a given range using a given type
608
 * @type: the type of variable to use
609
 * @val: current value
610
 * @lo: minimum allowable value
611
 * @hi: maximum allowable value
612
 *
613
 * This macro does no typechecking and uses temporary variables of type
614
 * 'type' to make all the comparisons.
615
 */
616
#define clamp_t(type, val, lo, hi) min_t(type, max_t(type, val, lo), hi)
617
 
618
/**
619
 * clamp_val - return a value clamped to a given range using val's type
620
 * @val: current value
621
 * @lo: minimum allowable value
622
 * @hi: maximum allowable value
623
 *
624
 * This macro does no typechecking and uses temporary variables of whatever
625
 * type the input argument 'val' is.  This is useful when val is an unsigned
626
 * type and min and max are literals that will otherwise be assigned a signed
627
 * integer type.
628
 */
629
#define clamp_val(val, lo, hi) clamp_t(typeof(val), val, lo, hi)
630
 
631
 
632
/*
633
 * swap - swap value of @a and @b
634
 */
635
#define swap(a, b) \
636
	do { typeof(a) __tmp = (a); (a) = (b); (b) = __tmp; } while (0)
637
 
638
/**
1408 serge 639
 * container_of - cast a member of a structure out to the containing structure
6082 serge 640
 * @ptr:	the pointer to the member.
641
 * @type:	the type of the container struct this is embedded in.
642
 * @member:	the name of the member within the struct.
1408 serge 643
 *
644
 */
6082 serge 645
#define container_of(ptr, type, member) ({			\
646
	const typeof( ((type *)0)->member ) *__mptr = (ptr);	\
647
	(type *)( (char *)__mptr - offsetof(type,member) );})
1408 serge 648
 
5270 serge 649
/* Rebuild everything on CONFIG_FTRACE_MCOUNT_RECORD */
650
#ifdef CONFIG_FTRACE_MCOUNT_RECORD
651
# define REBUILD_DUE_TO_FTRACE_MCOUNT_RECORD
652
#endif
1408 serge 653
 
5270 serge 654
/* Permissions on a sysfs file: you didn't miss the 0 prefix did you? */
6082 serge 655
#define VERIFY_OCTAL_PERMISSIONS(perms)						\
656
	(BUILD_BUG_ON_ZERO((perms) < 0) +					\
657
	 BUILD_BUG_ON_ZERO((perms) > 0777) +					\
658
	 /* USER_READABLE >= GROUP_READABLE >= OTHER_READABLE */		\
659
	 BUILD_BUG_ON_ZERO((((perms) >> 6) & 4) < (((perms) >> 3) & 4)) +	\
660
	 BUILD_BUG_ON_ZERO((((perms) >> 3) & 4) < ((perms) & 4)) +		\
661
	 /* USER_WRITABLE >= GROUP_WRITABLE */					\
662
	 BUILD_BUG_ON_ZERO((((perms) >> 6) & 2) < (((perms) >> 3) & 2)) +	\
663
	 /* OTHER_WRITABLE?  Generally considered a bad idea. */		\
664
	 BUILD_BUG_ON_ZERO((perms) & 2) +					\
5270 serge 665
	 (perms))
1408 serge 666
 
1412 serge 667
void free (void *ptr);
668
 
1408 serge 669
typedef unsigned long   pgprotval_t;
670
 
6102 serge 671
typedef struct
672
{
673
	u32  code;
674
	u32  data[5];
675
}kevent_t;
1408 serge 676
 
6102 serge 677
typedef union
678
{
679
	struct
680
	{
681
		u32 handle;
682
		u32 euid;
683
	};
684
	u64 raw;
685
}evhandle_t;
686
 
1408 serge 687
struct vm_area_struct {};
688
struct address_space {};
689
 
1964 serge 690
#define in_dbg_master() (0)
1408 serge 691
 
2005 serge 692
#define HZ 100
693
 
2967 Serge 694
struct tvec_base;
2005 serge 695
 
2967 Serge 696
struct timer_list {
697
         struct list_head entry;
698
         unsigned long expires;
699
 
700
         void (*function)(unsigned long);
701
         unsigned long data;
4125 Serge 702
         u32  handle;
2967 Serge 703
};
704
 
4125 Serge 705
#define setup_timer(_timer, _fn, _data)                                 \
706
        do {                                                            \
707
                (_timer)->function = (_fn);                             \
708
                (_timer)->data = (_data);                               \
709
                (_timer)->handle = 0;                                   \
710
        } while (0)
711
 
4292 Serge 712
int del_timer(struct timer_list *timer);
4125 Serge 713
 
4292 Serge 714
# define del_timer_sync(t)              del_timer(t)
715
 
2967 Serge 716
 
717
#define build_mmio_read(name, size, type, reg, barrier)     \
718
static inline type name(const volatile void __iomem *addr)  \
719
{ type ret; asm volatile("mov" size " %1,%0":reg (ret)      \
720
:"m" (*(volatile type __force *)addr) barrier); return ret; }
721
 
722
#define build_mmio_write(name, size, type, reg, barrier) \
723
static inline void name(type val, volatile void __iomem *addr) \
724
{ asm volatile("mov" size " %0,%1": :reg (val), \
725
"m" (*(volatile type __force *)addr) barrier); }
726
 
727
build_mmio_read(readb, "b", unsigned char, "=q", :"memory")
728
build_mmio_read(readw, "w", unsigned short, "=r", :"memory")
729
build_mmio_read(readl, "l", unsigned int, "=r", :"memory")
730
 
731
build_mmio_read(__readb, "b", unsigned char, "=q", )
732
build_mmio_read(__readw, "w", unsigned short, "=r", )
733
build_mmio_read(__readl, "l", unsigned int, "=r", )
734
 
735
build_mmio_write(writeb, "b", unsigned char, "q", :"memory")
736
build_mmio_write(writew, "w", unsigned short, "r", :"memory")
737
build_mmio_write(writel, "l", unsigned int, "r", :"memory")
738
 
739
build_mmio_write(__writeb, "b", unsigned char, "q", )
740
build_mmio_write(__writew, "w", unsigned short, "r", )
741
build_mmio_write(__writel, "l", unsigned int, "r", )
742
 
743
#define readb_relaxed(a) __readb(a)
744
#define readw_relaxed(a) __readw(a)
745
#define readl_relaxed(a) __readl(a)
746
#define __raw_readb __readb
747
#define __raw_readw __readw
748
#define __raw_readl __readl
749
 
750
#define __raw_writeb __writeb
751
#define __raw_writew __writew
752
#define __raw_writel __writel
753
 
3031 serge 754
#define swap(a, b) \
755
        do { typeof(a) __tmp = (a); (a) = (b); (b) = __tmp; } while (0)
2967 Serge 756
 
3031 serge 757
 
2967 Serge 758
#define mmiowb() barrier()
759
 
760
#define dev_err(dev, format, arg...)            \
761
        printk("Error %s " format, __func__ , ## arg)
762
 
763
#define dev_warn(dev, format, arg...)            \
764
        printk("Warning %s " format, __func__ , ## arg)
765
 
766
#define dev_info(dev, format, arg...)       \
767
        printk("Info %s " format , __func__, ## arg)
768
 
769
struct page
770
{
771
    unsigned int addr;
772
};
773
 
3243 Serge 774
#define page_to_phys(page)    ((dma_addr_t)(page))
2967 Serge 775
 
776
struct vm_fault {
777
    unsigned int flags;             /* FAULT_FLAG_xxx flags */
778
    pgoff_t pgoff;                  /* Logical page offset based on vma */
779
    void __user *virtual_address;   /* Faulting virtual address */
780
 
781
    struct page *page;              /* ->fault handlers should return a
782
                                     * page here, unless VM_FAULT_NOPAGE
783
                                     * is set (which is also implied by
784
                                     * VM_FAULT_ERROR).
785
                                     */
786
};
787
 
3031 serge 788
struct pagelist {
789
    dma_addr_t    *page;
790
    unsigned int   nents;
791
};
2967 Serge 792
 
3391 Serge 793
#define page_cache_release(page)        FreePage(page_to_phys(page))
3243 Serge 794
 
795
#define alloc_page(gfp_mask) (struct page*)AllocPage()
796
 
3391 Serge 797
#define __free_page(page) FreePage(page_to_phys(page))
798
 
799
#define get_page(a)
800
#define put_page(a)
801
 
802
#define IS_ENABLED(a)  0
803
 
804
 
805
 
3482 Serge 806
#define cpufreq_quick_get_max(x) GetCpuFreq()
807
 
808
extern unsigned int tsc_khz;
809
 
3747 Serge 810
#define on_each_cpu(func,info,wait)             \
811
        ({                                      \
812
                func(info);                     \
813
                0;                              \
814
        })
815
 
816
 
5056 serge 817
static inline __must_check long __copy_to_user(void __user *to,
818
        const void *from, unsigned long n)
819
{
820
    if (__builtin_constant_p(n)) {
821
        switch(n) {
822
        case 1:
823
            *(u8 __force *)to = *(u8 *)from;
824
            return 0;
825
        case 2:
826
            *(u16 __force *)to = *(u16 *)from;
827
            return 0;
828
        case 4:
829
            *(u32 __force *)to = *(u32 *)from;
830
            return 0;
831
        default:
832
            break;
833
        }
834
    }
1408 serge 835
 
5270 serge 836
    __builtin_memcpy((void __force *)to, from, n);
5056 serge 837
    return 0;
838
}
839
 
6293 serge 840
static __always_inline unsigned long
841
__copy_from_user(void *to, const void __user *from, unsigned long n)
842
{
843
    if (__builtin_constant_p(n)) {
844
        unsigned long ret;
845
 
846
        switch (n) {
847
            case 1:
848
                *(u8 __force *)to = *(u8 *)from;
849
                return 0;
850
            case 2:
851
                *(u16 __force *)to = *(u16 *)from;
852
                return 0;
853
            case 4:
854
                *(u32 __force *)to = *(u32 *)from;
855
                return 0;
856
            default:
857
                break;
858
        }
859
    }
860
    __builtin_memcpy((void __force *)to, from, n);
861
}
862
 
863
static inline long copy_from_user(void *to,
864
                const void __user * from, unsigned long n)
865
{
866
    return __copy_from_user(to, from, n);
867
}
868
 
869
static inline long copy_to_user(void __user *to,
870
                const void *from, unsigned long n)
871
{
872
    return __copy_to_user(to, from, n);
873
}
874
 
5178 serge 875
void *kmap(struct page *page);
876
void *kmap_atomic(struct page *page);
877
void kunmap(struct page *page);
878
void kunmap_atomic(void *vaddr);
879
 
5270 serge 880
typedef u64 async_cookie_t;
5178 serge 881
 
5270 serge 882
#define iowrite32(v, addr)      writel((v), (addr))
883
 
884
#define __init
885
 
886
#define CONFIG_PAGE_OFFSET 0
887
 
5056 serge 888
#endif