random32: rename random32 to prandom
[deliverable/linux.git] / include / linux / random.h
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1/*
2 * include/linux/random.h
3 *
4 * Include file for the random number generator.
5 */
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6#ifndef _LINUX_RANDOM_H
7#define _LINUX_RANDOM_H
8
607ca46e 9#include <uapi/linux/random.h>
1da177e4 10
1da177e4 11
a2080a67 12extern void add_device_randomness(const void *, unsigned int);
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13extern void add_input_randomness(unsigned int type, unsigned int code,
14 unsigned int value);
775f4b29 15extern void add_interrupt_randomness(int irq, int irq_flags);
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16
17extern void get_random_bytes(void *buf, int nbytes);
c2557a30 18extern void get_random_bytes_arch(void *buf, int nbytes);
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19void generate_random_uuid(unsigned char uuid_out[16]);
20
1da177e4 21#ifndef MODULE
54047320 22extern const struct file_operations random_fops, urandom_fops;
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23#endif
24
25unsigned int get_random_int(void);
26unsigned long randomize_range(unsigned long start, unsigned long end, unsigned long len);
27
496f2f93
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28u32 prandom_u32(void);
29void prandom_seed(u32 seed);
aaa248f6 30
496f2f93
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31/*
32 * These macros are preserved for backward compatibility and should be
33 * removed as soon as a transition is finished.
34 */
35#define random32() prandom_u32()
36#define srandom32(seed) prandom_seed(seed)
37
38u32 prandom_u32_state(struct rnd_state *);
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39
40/*
41 * Handle minimum values for seeds
42 */
43static inline u32 __seed(u32 x, u32 m)
44{
45 return (x < m) ? x + m : x;
46}
47
48/**
496f2f93 49 * prandom_seed_state - set seed for prandom_u32_state().
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50 * @state: pointer to state structure to receive the seed.
51 * @seed: arbitrary 64-bit value to use as a seed.
52 */
496f2f93 53static inline void prandom_seed_state(struct rnd_state *state, u64 seed)
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54{
55 u32 i = (seed >> 32) ^ (seed << 10) ^ seed;
56
57 state->s1 = __seed(i, 1);
58 state->s2 = __seed(i, 7);
59 state->s3 = __seed(i, 15);
60}
61
63d77173
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62#ifdef CONFIG_ARCH_RANDOM
63# include <asm/archrandom.h>
64#else
65static inline int arch_get_random_long(unsigned long *v)
66{
67 return 0;
68}
69static inline int arch_get_random_int(unsigned int *v)
70{
71 return 0;
72}
73#endif
74
1da177e4 75#endif /* _LINUX_RANDOM_H */
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