1/*
2 * Copyright 2014, Michael Ellerman, IBM Corp.
3 * Licensed under GPLv2.
4 */
5
6#include <stdio.h>
7#include <stdlib.h>
8
9#include "ebb.h"
10#include "reg.h"
11
12
13/*
14 * Test basic access to the EBB regs, they should be user accessible with no
15 * kernel interaction required.
16 */
17int reg_access(void)
18{
19	uint64_t val, expected;
20
21	SKIP_IF(!ebb_is_supported());
22
23	expected = 0x8000000100000000ull;
24	mtspr(SPRN_BESCR, expected);
25	val = mfspr(SPRN_BESCR);
26
27	FAIL_IF(val != expected);
28
29	expected = 0x0000000001000000ull;
30	mtspr(SPRN_EBBHR, expected);
31	val = mfspr(SPRN_EBBHR);
32
33	FAIL_IF(val != expected);
34
35	return 0;
36}
37
38int main(void)
39{
40	return test_harness(reg_access, "reg_access");
41}
42