arch/sparc/lib/time.c

   1 /*
   2  * (C) Copyright 2000, 2001
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * (C) Copyright 2007
   6  * Daniel Hellstrom, Gaisler Research, daniel@gaisler.com.
   7  *
   8  * SPDX-License-Identifier:     GPL-2.0+
   9  */
  10
  11 #include <common.h>
  12
  13 /* Implemented by SPARC CPUs */
  14 extern void cpu_wait_ticks(unsigned long ticks);
  15 extern unsigned long cpu_usec2ticks(unsigned long usec);
  16 extern unsigned long cpu_ticks2usec(unsigned long ticks);
  17
  18 /* ------------------------------------------------------------------------- */
  19
  20 void wait_ticks(unsigned long ticks)
  21 {
  22         cpu_wait_ticks(ticks);
  23 }
  24
  25 /*
  26  * This function is intended for SHORT delays only.
  27  */
  28 unsigned long usec2ticks(unsigned long usec)
  29 {
  30         return cpu_usec2ticks(usec);
  31 }
  32
  33 /* ------------------------------------------------------------------------- */
  34
  35 /*
  36  * We implement the delay by converting the delay (the number of
  37  * microseconds to wait) into a number of time base ticks; then we
  38  * watch the time base until it has incremented by that amount.
  39  */
  40 void __udelay(unsigned long usec)
  41 {
  42         ulong ticks = usec2ticks(usec);
  43
  44         wait_ticks(ticks);
  45 }
  46
  47 /* ------------------------------------------------------------------------- */
  48
  49 unsigned long ticks2usec(unsigned long ticks)
  50 {
  51         return cpu_ticks2usec(ticks);
  52 }
  53
  54 /* ------------------------------------------------------------------------- */
  55
  56 int init_timebase(void)
  57 {
  58
  59         return (0);
  60 }
  61
  62 /* ------------------------------------------------------------------------- */