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 CONFIG_POST & CONFIG_SYS_POST_CPU
25
26 extern void cpu_post_exec_02(ulong *code, ulong op1, ulong op2);
27
cpu_post_test_multi(void)28 int 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