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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 *
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 * Binary instructions instr rD,rA
29 *
30 * Logic instructions: neg
31 * Arithmetic instructions: addme, addze, subfme, subfze
32
33 * The test contains a pre-built table of instructions, operands and
34 * expected results. For each table entry, the test will cyclically use
35 * different sets of operand registers and result registers.
36 */
37
Wolfgang Denkad5bb452007-03-06 18:08:43 +010038#include <post.h>
39#include "cpu_asm.h"
40
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020041#if CONFIG_POST & CONFIG_SYS_POST_CPU
Wolfgang Denkad5bb452007-03-06 18:08:43 +010042
43extern void cpu_post_exec_21 (ulong *code, ulong *cr, ulong *res, ulong op1);
44extern ulong cpu_post_makecr (long v);
45
46static struct cpu_post_two_s
47{
48 ulong cmd;
49 ulong op;
50 ulong res;
51} cpu_post_two_table[] =
52{
53 {
54 OP_NEG,
55 3,
56 -3
57 },
58 {
59 OP_NEG,
60 5,
61 -5
62 },
63 {
64 OP_ADDME,
65 6,
66 5
67 },
68 {
69 OP_ADDZE,
70 5,
71 5
72 },
73 {
74 OP_SUBFME,
75 6,
76 ~6 - 1
77 },
78 {
79 OP_SUBFZE,
80 5,
81 ~5
82 },
83};
Mike Frysingerd2397812011-05-10 07:28:35 +000084static unsigned int cpu_post_two_size = ARRAY_SIZE(cpu_post_two_table);
Wolfgang Denkad5bb452007-03-06 18:08:43 +010085
86int cpu_post_test_two (void)
87{
88 int ret = 0;
89 unsigned int i, reg;
90 int flag = disable_interrupts();
91
92 for (i = 0; i < cpu_post_two_size && ret == 0; i++)
93 {
94 struct cpu_post_two_s *test = cpu_post_two_table + i;
95
96 for (reg = 0; reg < 32 && ret == 0; reg++)
97 {
98 unsigned int reg0 = (reg + 0) % 32;
99 unsigned int reg1 = (reg + 1) % 32;
100 unsigned int stk = reg < 16 ? 31 : 15;
101 unsigned long code[] =
102 {
103 ASM_STW(stk, 1, -4),
104 ASM_ADDI(stk, 1, -16),
105 ASM_STW(3, stk, 8),
106 ASM_STW(reg0, stk, 4),
107 ASM_STW(reg1, stk, 0),
108 ASM_LWZ(reg0, stk, 8),
109 ASM_11(test->cmd, reg1, reg0),
110 ASM_STW(reg1, stk, 8),
111 ASM_LWZ(reg1, stk, 0),
112 ASM_LWZ(reg0, stk, 4),
113 ASM_LWZ(3, stk, 8),
114 ASM_ADDI(1, stk, 16),
115 ASM_LWZ(stk, 1, -4),
116 ASM_BLR,
117 };
118 unsigned long codecr[] =
119 {
120 ASM_STW(stk, 1, -4),
121 ASM_ADDI(stk, 1, -16),
122 ASM_STW(3, stk, 8),
123 ASM_STW(reg0, stk, 4),
124 ASM_STW(reg1, stk, 0),
125 ASM_LWZ(reg0, stk, 8),
126 ASM_11(test->cmd, reg1, reg0) | BIT_C,
127 ASM_STW(reg1, stk, 8),
128 ASM_LWZ(reg1, stk, 0),
129 ASM_LWZ(reg0, stk, 4),
130 ASM_LWZ(3, stk, 8),
131 ASM_ADDI(1, stk, 16),
132 ASM_LWZ(stk, 1, -4),
133 ASM_BLR,
134 };
135 ulong res;
136 ulong cr;
137
138 if (ret == 0)
139 {
140 cr = 0;
141 cpu_post_exec_21 (code, & cr, & res, test->op);
142
143 ret = res == test->res && cr == 0 ? 0 : -1;
144
145 if (ret != 0)
146 {
147 post_log ("Error at two test %d !\n", i);
148 }
149 }
150
151 if (ret == 0)
152 {
153 cpu_post_exec_21 (codecr, & cr, & res, test->op);
154
155 ret = res == test->res &&
156 (cr & 0xe0000000) == cpu_post_makecr (res) ? 0 : -1;
157
158 if (ret != 0)
159 {
160 post_log ("Error at two test %d !\n", i);
161 }
162 }
163 }
164 }
165
166 if (flag)
167 enable_interrupts();
168
169 return ret;
170}
171
172#endif