Subversion Repositories HelenOS-historic

Rev

Rev 107 | Rev 413 | Go to most recent revision | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 107 Rev 404
Line 36... Line 36...
36 
 *
 36 
 *
37 
 * Delay the execution for the given number
 37 
 * Delay the execution for the given number
38 
 * of microseconds (or slightly more). The delay
 38 
 * of microseconds (or slightly more). The delay
39 
 * is implemented as CPU calibrated active loop.
 39 
 * is implemented as CPU calibrated active loop.
40 
 *
 40 
 *
41 
 * @param microseconds Number of usec to sleep.
 41 
 * @param usec Number of microseconds to sleep.
42 
 *
 - 
 
43 
 */
 42 
 */
44 
void delay(__u32 microseconds)
 43 
void delay(__u32 usec)
45 
{
 44 
{
46 
    pri_t pri;
 45 
    pri_t pri;
47 
   
 46 
   
48 
    /* The delay loop is calibrated for each and every
 47 
    /* The delay loop is calibrated for each and every
49 
       CPU in the system. Therefore it is necessary to
 48 
       CPU in the system. Therefore it is necessary to
50 
       cpu_priority_high() before calling the asm_delay_loop(). */
 49 
       cpu_priority_high() before calling the asm_delay_loop(). */
51 
    pri = cpu_priority_high();
 50 
    pri = cpu_priority_high();
52 
    asm_delay_loop(microseconds * CPU->delay_loop_const);
 51 
    asm_delay_loop(usec * CPU->delay_loop_const);
53 
    cpu_priority_restore(pri);
 52 
    cpu_priority_restore(pri);
54 
}
 53 
}