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 * Binary instructions instr rA,rS
29 *
30 * Logic instructions: cntlzw
31 * Arithmetic instructions: extsb, extsh
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
38 #include <post.h>
39 #include "cpu_asm.h"
40
41 #if CONFIG_POST & CONFIG_SYS_POST_CPU
42
43 extern void cpu_post_exec_21 (ulong *code, ulong *cr, ulong *res, ulong op1);
44 extern ulong cpu_post_makecr (long v);
45
46 static struct cpu_post_twox_s
47 {
48 ulong cmd;
49 ulong op;
50 ulong res;
51 } cpu_post_twox_table[] =
52 {
53 {
54 OP_EXTSB,
55 3,
56 3
57 },
58 {
59 OP_EXTSB,
60 0xff,
61 -1
62 },
63 {
64 OP_EXTSH,
65 3,
66 3
67 },
68 {
69 OP_EXTSH,
70 0xff,
71 0xff
72 },
73 {
74 OP_EXTSH,
75 0xffff,
76 -1
77 },
78 {
79 OP_CNTLZW,
80 0x000fffff,
81 12
82 },
83 };
84 static unsigned int cpu_post_twox_size =
85 sizeof (cpu_post_twox_table) / sizeof (struct cpu_post_twox_s);
86
cpu_post_test_twox(void)87 int cpu_post_test_twox (void)
88 {
89 int ret = 0;
90 unsigned int i, reg;
91 int flag = disable_interrupts();
92
93 for (i = 0; i < cpu_post_twox_size && ret == 0; i++)
94 {
95 struct cpu_post_twox_s *test = cpu_post_twox_table + i;
96
97 for (reg = 0; reg < 32 && ret == 0; reg++)
98 {
99 unsigned int reg0 = (reg + 0) % 32;
100 unsigned int reg1 = (reg + 1) % 32;
101 unsigned int stk = reg < 16 ? 31 : 15;
102 unsigned long code[] =
103 {
104 ASM_STW(stk, 1, -4),
105 ASM_ADDI(stk, 1, -16),
106 ASM_STW(3, stk, 8),
107 ASM_STW(reg0, stk, 4),
108 ASM_STW(reg1, stk, 0),
109 ASM_LWZ(reg0, stk, 8),
110 ASM_11X(test->cmd, reg1, reg0),
111 ASM_STW(reg1, stk, 8),
112 ASM_LWZ(reg1, stk, 0),
113 ASM_LWZ(reg0, stk, 4),
114 ASM_LWZ(3, stk, 8),
115 ASM_ADDI(1, stk, 16),
116 ASM_LWZ(stk, 1, -4),
117 ASM_BLR,
118 };
119 unsigned long codecr[] =
120 {
121 ASM_STW(stk, 1, -4),
122 ASM_ADDI(stk, 1, -16),
123 ASM_STW(3, stk, 8),
124 ASM_STW(reg0, stk, 4),
125 ASM_STW(reg1, stk, 0),
126 ASM_LWZ(reg0, stk, 8),
127 ASM_11X(test->cmd, reg1, reg0) | BIT_C,
128 ASM_STW(reg1, stk, 8),
129 ASM_LWZ(reg1, stk, 0),
130 ASM_LWZ(reg0, stk, 4),
131 ASM_LWZ(3, stk, 8),
132 ASM_ADDI(1, stk, 16),
133 ASM_LWZ(stk, 1, -4),
134 ASM_BLR,
135 };
136 ulong res;
137 ulong cr;
138
139 if (ret == 0)
140 {
141 cr = 0;
142 cpu_post_exec_21 (code, & cr, & res, test->op);
143
144 ret = res == test->res && cr == 0 ? 0 : -1;
145
146 if (ret != 0)
147 {
148 post_log ("Error at twox test %d !\n", i);
149 }
150 }
151
152 if (ret == 0)
153 {
154 cpu_post_exec_21 (codecr, & cr, & res, test->op);
155
156 ret = res == test->res &&
157 (cr & 0xe0000000) == cpu_post_makecr (res) ? 0 : -1;
158
159 if (ret != 0)
160 {
161 post_log ("Error at twox test %d !\n", i);
162 }
163 }
164 }
165 }
166
167 if (flag)
168 enable_interrupts();
169
170 return ret;
171 }
172
173 #endif
174