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
10/*
11 * CPU test
12 * Load/store string instructions:	lswi, stswi, lswx, stswx
13 *
14 * Several consecutive bytes from a source memory buffer are loaded
15 * left to right into GPRs. After that, the bytes are stored
16 * from the GPRs into a target memory buffer. The contents
17 * of the source and target buffers are then compared.
18 */
19
20#include <post.h>
21#include "cpu_asm.h"
22
23#if CFG_POST & CFG_SYS_POST_CPU
24
25extern void cpu_post_exec_02 (ulong *code, ulong op1, ulong op2);
26extern void cpu_post_exec_04 (ulong *code, ulong op1, ulong op2, ulong op3,
27    ulong op4);
28
29int cpu_post_test_string (void)
30{
31    int ret = 0;
32    unsigned int i;
33    int flag = disable_interrupts();
34
35    if (ret == 0)
36    {
37	char src [31], dst [31];
38
39	ulong code[] =
40	{
41	    ASM_LSWI(5, 3, 31),
42	    ASM_STSWI(5, 4, 31),
43	    ASM_BLR,
44	};
45
46	for (i = 0; i < sizeof(src); i ++)
47	{
48	    src[i] = (char) i;
49	    dst[i] = 0;
50	}
51
52	cpu_post_exec_02(code, (ulong)src, (ulong)dst);
53
54	ret = memcmp(src, dst, sizeof(dst)) == 0 ? 0 : -1;
55    }
56
57    if (ret == 0)
58    {
59	char src [95], dst [95];
60
61	ulong code[] =
62	{
63	    ASM_LSWX(8, 3, 5),
64	    ASM_STSWX(8, 4, 5),
65	    ASM_BLR,
66	};
67
68	for (i = 0; i < sizeof(src); i ++)
69	{
70	    src[i] = (char) i;
71	    dst[i] = 0;
72	}
73
74	cpu_post_exec_04(code, (ulong)src, (ulong)dst, 0, sizeof(src));
75
76	ret = memcmp(src, dst, sizeof(dst)) == 0 ? 0 : -1;
77    }
78
79    if (ret != 0)
80    {
81	post_log ("Error at string test !\n");
82    }
83
84    if (flag)
85	enable_interrupts();
86
87    return ret;
88}
89
90#endif
91