stckf.c revision 8f943afc22a6a683b78271836c8ddc462b4824a9 
1#include<stdio.h>
2#include<time.h>
3#include<stdlib.h>
4#include<unistd.h>
5
6int stckf(unsigned long *addr)
7{
8	int cc;
9	asm volatile (	".insn s,0xb27c0000,%0\n"
10			"ipm	%1\n"
11			"srl	%1,28\n"
12		      :"=Q" (*addr), "=d"(cc)::"memory", "cc");
13	return cc;
14}
15
16unsigned long clockticks_in_msec(unsigned long b, unsigned long a)
17{
18	return (b - a) / 4096000UL;
19}
20
21int main()
22{
23
24	int cc;
25	unsigned long start, end, diff;
26
27	cc = stckf(&start);
28	if (cc)
29		printf("cc != 0!\n");
30	sleep(1);
31	cc = stckf(&end);
32	if (cc)
33		printf("cc != 0!\n");
34
35	diff = clockticks_in_msec(end, start);
36	if (diff >= 1000 && diff < 1500)
37		printf("OK.....Testcase passed\n");
38	else
39		printf("FAILED.....Testcase failed\n");
40	return 0;
41
42}
43