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 CONFIG_POST & CONFIG_SYS_POST_CPU
24
25 extern void cpu_post_exec_02 (ulong *code, ulong op1, ulong op2);
26 extern void cpu_post_exec_04 (ulong *code, ulong op1, ulong op2, ulong op3,
27 ulong op4);
28
29 #include <bedbug/regs.h>
cpu_post_test_string(void)30 int cpu_post_test_string (void)
31 {
32 int ret = 0;
33 unsigned int i;
34 int flag = disable_interrupts();
35
36 if (ret == 0)
37 {
38 char src [31], dst [31];
39
40 ulong code[] =
41 {
42 ASM_LSWI(5, 3, 31),
43 ASM_STSWI(5, 4, 31),
44 ASM_BLR,
45 };
46
47 for (i = 0; i < sizeof(src); i ++)
48 {
49 src[i] = (char) i;
50 dst[i] = 0;
51 }
52
53 cpu_post_exec_02(code, (ulong)src, (ulong)dst);
54
55 ret = memcmp(src, dst, sizeof(dst)) == 0 ? 0 : -1;
56 }
57
58 if (ret == 0)
59 {
60 char src [95], dst [95];
61
62 ulong code[] =
63 {
64 ASM_LSWX(8, 3, 5),
65 ASM_STSWX(8, 4, 5),
66 ASM_BLR,
67 };
68
69 for (i = 0; i < sizeof(src); i ++)
70 {
71 src[i] = (char) i;
72 dst[i] = 0;
73 }
74
75 cpu_post_exec_04(code, (ulong)src, (ulong)dst, 0, sizeof(src));
76
77 ret = memcmp(src, dst, sizeof(dst)) == 0 ? 0 : -1;
78 }
79
80 if (ret != 0)
81 {
82 post_log ("Error at string test !\n");
83 }
84
85 if (flag)
86 enable_interrupts();
87
88 return ret;
89 }
90
91 #endif
92