payloads/libpayload/include/delay.h

   1 /* SPDX-License-Identifier: BSD-3-Clause */
   2
   3 #ifndef LIBPAYLOAD_DELAY_H
   4 #define LIBPAYLOAD_DELAY_H
   5
   6 #include <stdint.h>
   7
   8 #define NSECS_PER_SEC 1000000000
   9 #define USECS_PER_SEC 1000000
  10 #define MSECS_PER_SEC 1000
  11 #define NSECS_PER_MSEC (NSECS_PER_SEC / MSECS_PER_SEC)
  12 #define NSECS_PER_USEC (NSECS_PER_SEC / USECS_PER_SEC)
  13 #define USECS_PER_MSEC (USECS_PER_SEC / MSECS_PER_SEC)
  14
  15 unsigned int get_cpu_speed(void);
  16
  17 void arch_ndelay(uint64_t n);
  18
  19 /**
  20  * Delay for a specified number of nanoseconds.
  21  *
  22  * @param ns Number of nanoseconds to delay for.
  23  */
  24 static inline void ndelay(unsigned int ns)
  25 {
  26         arch_ndelay((uint64_t)ns);
  27 }
  28
  29 /**
  30  * Delay for a specified number of microseconds.
  31  *
  32  * @param us Number of microseconds to delay for.
  33  */
  34 static inline void udelay(unsigned int us)
  35 {
  36         arch_ndelay((uint64_t)us * NSECS_PER_USEC);
  37 }
  38
  39 /**
  40  * Delay for a specified number of milliseconds.
  41  *
  42  * @param ms Number of milliseconds to delay for.
  43  */
  44 static inline void mdelay(unsigned int ms)
  45 {
  46         arch_ndelay((uint64_t)ms * NSECS_PER_MSEC);
  47 }
  48
  49 /**
  50  * Delay for a specified number of seconds.
  51  *
  52  * @param s Number of seconds to delay for.
  53  */
  54 static inline void delay(unsigned int s)
  55 {
  56         arch_ndelay((uint64_t)s * NSECS_PER_SEC);
  57 }
  58
  59 #endif /* LIBPAYLOAD_DELAY_H */