blob: 5a3829d728e1fd49e17aa9dfdb273f59b2487fa0 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
|
#ifndef FUNCGEN_UTIL_H_
#define FUNCGEN_UTIL_H_
#include <stdint.h>
#include <avr/eeprom.h>
#include <avr/interrupt.h>
#include <avr/pgmspace.h>
/* Some of these macros are derived from the Linux Kernel sources. */
#define likely(x) __builtin_expect(!!(x), 1)
#define unlikely(x) __builtin_expect(!!(x), 0)
#undef offsetof
#define offsetof(type, member) ((size_t)&((type *)0)->member)
#define min(a, b) ((a) < (b) ? (a) : (b))
#define max(a, b) ((a) > (b) ? (a) : (b))
#define abs(x) ((x) >= 0 ? (x) : -(x))
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
/* Memory barrier.
* The CPU doesn't have runtime reordering, so we just
* need a compiler memory clobber. */
#define mb() __asm__ __volatile__("" : : : "memory")
/* Function annotation. Warn if the return value is unused. */
#define WARN_UNUSED_RES __attribute__((__warn_unused_result__))
/* Convert something indirectly to a string */
#define __stringify(x) #x
#define stringify(x) __stringify(x)
/* Progmem pointer annotation. */
#define PROGPTR /* progmem pointer */
/* Assertions */
void panic(const char PROGPTR *msg) __attribute__((noreturn));
#define BUILD_BUG_ON(x) ((void)sizeof(char[1 - 2 * !!(x)]))
#define BUG_ON(x) \
do { \
if (unlikely(x)) \
panic(PSTR(__FILE__ \
stringify(__LINE__))); \
} while (0)
/* Delay */
void mdelay(uint16_t msecs);
void udelay(uint16_t usecs);
typedef _Bool bool;
static inline void irq_disable(void)
{
cli();
mb();
}
static inline void irq_enable(void)
{
mb();
sei();
}
static inline uint8_t WARN_UNUSED_RES irq_disable_save(void)
{
uint8_t sreg = SREG;
cli();
mb();
return sreg;
}
static inline void irq_restore(uint8_t sreg_flags)
{
mb();
SREG = sreg_flags;
}
/* Jiffies timing helpers derived from the Linux Kernel sources.
* These inlines deal with timer wrapping correctly.
*
* time_after(a, b) returns true if the time a is after time b.
*
* Do this with "<0" and ">=0" to only test the sign of the result. A
* good compiler would generate better code (and a really good compiler
* wouldn't care). Gcc is currently neither.
*/
#define time_after(a, b) ((int16_t)(b) - (int16_t)(a) < 0)
#define time_before(a, b) time_after(b, a)
#undef __naked
#define __naked __attribute__((__naked__))
#undef __used
#define __used __attribute__((__used__))
#endif /* FUNCGEN_UTIL_H_ */
|
