c/src/lib/libbsp/sparc/leon3/startup/bspdelay.c


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

/**
 *  @file
 *
 *  LEON3 BSP Delay Method
 */

/*
 *  COPYRIGHT (c) 1989-2011.
 *  On-Line Applications Research Corporation (OAR).
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.rtems.com/license/LICENSE.
 */

#include <bsp.h>

void rtems_bsp_delay(int usecs)
{
  uint32_t then;

  then  =LEON3_Timer_Regs->timer[0].value;
  then += usecs;

  while (LEON3_Timer_Regs->timer[0].value >= then)
    ;
}