123456789101112131415161718192021222324 |
- #include "platform.h"
- #include "timer.h"
- #include "sys.h"
- #include "clkgen_ctrl_macro.h"
- #define TIMER_CLK_HZ 25000000
- u64 usec_to_tick(u32 usec)
- {
- u64 value;
- value = usec*(TIMER_CLK_HZ/1000000);
- return value;
- }
- /* delay x useconds */
- void udelay(unsigned long usec)
- {
- unsigned long tmp;
- tmp = readq((volatile void *)CLINT_CTRL_MTIME) + usec_to_tick(usec); /* get current timestamp */
-
- while (readq((volatile void *)CLINT_CTRL_MTIME) < tmp);
- }
|