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