1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * (C) Copyright 2002
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 */
6
7#include <common.h>
8#include <irq_func.h>
9#include <log.h>
10
11/*
12 * CPU test
13 * Load/store multiple word instructions:	lmw, stmw
14 *
15 * 27 consecutive words are loaded from a source memory buffer
16 * into GPRs r5 through r31. After that, 27 consecutive words are stored
17 * from the GPRs r5 through r31 into a target memory buffer. The contents
18 * of the source and target buffers are then compared.
19 */
20
21#include <post.h>
22#include "cpu_asm.h"
23
24#if CFG_POST & CFG_SYS_POST_CPU
25
26extern void cpu_post_exec_02(ulong *code, ulong op1, ulong op2);
27
28int cpu_post_test_multi(void)
29{
30	int ret = 0;
31	unsigned int i;
32	ulong src[27], dst[27];
33	int flag = disable_interrupts();
34
35	ulong code[] = {
36		ASM_LMW(5, 3, 0),	/* lmw	r5, 0(r3)	*/
37		ASM_STMW(5, 4, 0),	/* stmr	r5, 0(r4)	*/
38		ASM_BLR,		/* blr			*/
39	};
40
41	for (i = 0; i < ARRAY_SIZE(src); ++i) {
42		src[i] = i;
43		dst[i] = 0;
44	}
45
46	cpu_post_exec_02(code, (ulong) src, (ulong) dst);
47
48	ret = memcmp(src, dst, sizeof(dst)) == 0 ? 0 : -1;
49
50	if (ret != 0)
51		post_log("Error at multi test !\n");
52
53	if (flag)
54		enable_interrupts();
55
56	return ret;
57}
58
59#endif
60