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Wolfgang Denkad5bb452007-03-06 18:08:43 +01001/*
2 * (C) Copyright 2002
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
Wolfgang Denk1a459662013-07-08 09:37:19 +02005 * SPDX-License-Identifier: GPL-2.0+
Wolfgang Denkad5bb452007-03-06 18:08:43 +01006 */
7
8#include <common.h>
9
10/*
11 * CPU test
12 * Integer compare instructions: cmpw, cmplw
13 *
14 * To verify these instructions the test runs them with
15 * different combinations of operands, reads the condition
16 * register value and compares it with the expected one.
17 * The test contains a pre-built table
18 * containing the description of each test case: the instruction,
19 * the values of the operands, the condition field to save
20 * the result in and the expected result.
21 */
22
Wolfgang Denkad5bb452007-03-06 18:08:43 +010023#include <post.h>
24#include "cpu_asm.h"
25
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020026#if CONFIG_POST & CONFIG_SYS_POST_CPU
Wolfgang Denkad5bb452007-03-06 18:08:43 +010027
28extern void cpu_post_exec_12 (ulong *code, ulong *res, ulong op1, ulong op2);
29
30static struct cpu_post_cmp_s
31{
32 ulong cmd;
33 ulong op1;
34 ulong op2;
35 ulong cr;
36 ulong res;
37} cpu_post_cmp_table[] =
38{
39 {
40 OP_CMPW,
41 123,
42 123,
43 2,
44 0x02
45 },
46 {
47 OP_CMPW,
48 123,
49 133,
50 3,
51 0x08
52 },
53 {
54 OP_CMPW,
55 123,
56 -133,
57 4,
58 0x04
59 },
60 {
61 OP_CMPLW,
62 123,
63 123,
64 2,
65 0x02
66 },
67 {
68 OP_CMPLW,
69 123,
70 -133,
71 3,
72 0x08
73 },
74 {
75 OP_CMPLW,
76 123,
77 113,
78 4,
79 0x04
80 },
81};
Mike Frysingerd2397812011-05-10 07:28:35 +000082static unsigned int cpu_post_cmp_size = ARRAY_SIZE(cpu_post_cmp_table);
Wolfgang Denkad5bb452007-03-06 18:08:43 +010083
84int cpu_post_test_cmp (void)
85{
86 int ret = 0;
87 unsigned int i;
Stefan Roesef2302d42008-08-06 14:05:38 +020088 int flag = disable_interrupts();
Wolfgang Denkad5bb452007-03-06 18:08:43 +010089
90 for (i = 0; i < cpu_post_cmp_size && ret == 0; i++)
91 {
92 struct cpu_post_cmp_s *test = cpu_post_cmp_table + i;
Wolfgang Denk53677ef2008-05-20 16:00:29 +020093 unsigned long code[] =
Wolfgang Denkad5bb452007-03-06 18:08:43 +010094 {
95 ASM_2C(test->cmd, test->cr, 3, 4),
96 ASM_MFCR(3),
97 ASM_BLR
98 };
99 ulong res;
100
101 cpu_post_exec_12 (code, & res, test->op1, test->op2);
102
103 ret = ((res >> (28 - 4 * test->cr)) & 0xe) == test->res ? 0 : -1;
104
105 if (ret != 0)
106 {
107 post_log ("Error at cmp test %d !\n", i);
108 }
109 }
110
Stefan Roesef2302d42008-08-06 14:05:38 +0200111 if (flag)
112 enable_interrupts();
113
Wolfgang Denkad5bb452007-03-06 18:08:43 +0100114 return ret;
115}
116
117#endif