12 lines
236 B
C
12 lines
236 B
C
|
void udelay(int us)
|
||
|
|
{
|
||
|
|
int count0,count1;
|
||
|
|
int debug=0;
|
||
|
|
us *=CPU_COUNT_PER_US;
|
||
|
|
asm volatile("mfc0 %0,$9":"=r"(count0));
|
||
|
|
do{
|
||
|
|
asm volatile("mfc0 %0,$9":"=r"(count1));
|
||
|
|
}while(count1 -count0<us);
|
||
|
|
asm volatile("mtc0 %0,$23;"::"r"(debug));
|
||
|
|
}
|