mirror of
https://github.com/KolibriOS/kolibrios.git
synced 2024-12-11 09:34:09 +03:00
42 lines
1.0 KiB
C
42 lines
1.0 KiB
C
|
#ifndef __ASM_GENERIC_DELAY_H
|
||
|
|
#define __ASM_GENERIC_DELAY_H
|
||
|
|
|
||
|
|
/* Undefined functions to get compile-time errors */
|
||
|
|
extern void __bad_udelay(void);
|
||
|
|
extern void __bad_ndelay(void);
|
||
|
|
|
||
|
|
extern void __udelay(unsigned long usecs);
|
||
|
|
extern void __ndelay(unsigned long nsecs);
|
||
|
|
extern void __const_udelay(unsigned long xloops);
|
||
|
|
extern void __delay(unsigned long loops);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The weird n/20000 thing suppresses a "comparison is always false due to
|
||
|
|
* limited range of data type" warning with non-const 8-bit arguments.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* 0x10c7 is 2**32 / 1000000 (rounded up) */
|
||
|
|
#define udelay(n) \
|
||
|
|
({ \
|
||
|
|
if (__builtin_constant_p(n)) { \
|
||
|
|
__const_udelay((n) * 0x10c7ul); \
|
||
|
|
} else { \
|
||
|
|
__udelay(n); \
|
||
|
|
} \
|
||
|
|
})
|
||
|
|
|
||
|
|
/* 0x5 is 2**32 / 1000000000 (rounded up) */
|
||
|
|
#define ndelay(n) \
|
||
|
|
({ \
|
||
|
|
if (__builtin_constant_p(n)) { \
|
||
|
|
if ((n) / 20000 >= 1) \
|
||
|
|
__bad_ndelay(); \
|
||
|
|
else \
|
||
|
|
__const_udelay((n) * 5ul); \
|
||
|
|
} else { \
|
||
|
|
__ndelay(n); \
|
||
|
|
} \
|
||
|
|
})
|
||
|
|
|
||
|
|
#endif /* __ASM_GENERIC_DELAY_H */
|