1 /*
2 * (C) Copyright 2002
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 * MA 02111-1307 USA
22 */
23
24 #include <common.h>
25
26 /*
27 * CPU test
28 * Load/store string instructions: lswi, stswi, lswx, stswx
29 *
30 * Several consecutive bytes from a source memory buffer are loaded
31 * left to right into GPRs. After that, the bytes are stored
32 * from the GPRs into a target memory buffer. The contents
33 * of the source and target buffers are then compared.
34 */
35
36 #include <post.h>
37 #include "cpu_asm.h"
38
39 #if CONFIG_POST & CONFIG_SYS_POST_CPU
40
41 extern void cpu_post_exec_02 (ulong *code, ulong op1, ulong op2);
42 extern void cpu_post_exec_04 (ulong *code, ulong op1, ulong op2, ulong op3,
43 ulong op4);
44
45 #include <bedbug/regs.h>
cpu_post_test_string(void)46 int cpu_post_test_string (void)
47 {
48 int ret = 0;
49 unsigned int i;
50 int flag = disable_interrupts();
51
52 if (ret == 0)
53 {
54 char src [31], dst [31];
55
56 ulong code[] =
57 {
58 ASM_LSWI(5, 3, 31),
59 ASM_STSWI(5, 4, 31),
60 ASM_BLR,
61 };
62
63 for (i = 0; i < sizeof(src); i ++)
64 {
65 src[i] = (char) i;
66 dst[i] = 0;
67 }
68
69 cpu_post_exec_02(code, (ulong)src, (ulong)dst);
70
71 ret = memcmp(src, dst, sizeof(dst)) == 0 ? 0 : -1;
72 }
73
74 if (ret == 0)
75 {
76 char src [95], dst [95];
77
78 ulong code[] =
79 {
80 ASM_LSWX(8, 3, 5),
81 ASM_STSWX(8, 4, 5),
82 ASM_BLR,
83 };
84
85 for (i = 0; i < sizeof(src); i ++)
86 {
87 src[i] = (char) i;
88 dst[i] = 0;
89 }
90
91 cpu_post_exec_04(code, (ulong)src, (ulong)dst, 0, sizeof(src));
92
93 ret = memcmp(src, dst, sizeof(dst)) == 0 ? 0 : -1;
94 }
95
96 if (ret != 0)
97 {
98 post_log ("Error at string test !\n");
99 }
100
101 if (flag)
102 enable_interrupts();
103
104 return ret;
105 }
106
107 #endif
108