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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 * Ternary instructions instr rA,rS,rB
29 *
30 * Logic instructions: or, orc, xor, nand, nor, eqv
31 * Shift instructions: slw, srw, sraw
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_22 (ulong *code, ulong *cr, ulong *res, ulong op1,
44 ulong op2);
45 extern ulong cpu_post_makecr (long v);
46
47 static struct cpu_post_threex_s
48 {
49 ulong cmd;
50 ulong op1;
51 ulong op2;
52 ulong res;
53 } cpu_post_threex_table[] =
54 {
55 {
56 OP_OR,
57 0x1234,
58 0x5678,
59 0x1234 | 0x5678
60 },
61 {
62 OP_ORC,
63 0x1234,
64 0x5678,
65 0x1234 | ~0x5678
66 },
67 {
68 OP_XOR,
69 0x1234,
70 0x5678,
71 0x1234 ^ 0x5678
72 },
73 {
74 OP_NAND,
75 0x1234,
76 0x5678,
77 ~(0x1234 & 0x5678)
78 },
79 {
80 OP_NOR,
81 0x1234,
82 0x5678,
83 ~(0x1234 | 0x5678)
84 },
85 {
86 OP_EQV,
87 0x1234,
88 0x5678,
89 ~(0x1234 ^ 0x5678)
90 },
91 {
92 OP_SLW,
93 0x80,
94 16,
95 0x800000
96 },
97 {
98 OP_SLW,
99 0x80,
100 32,
101 0
102 },
103 {
104 OP_SRW,
105 0x800000,
106 16,
107 0x80
108 },
109 {
110 OP_SRW,
111 0x800000,
112 32,
113 0
114 },
115 {
116 OP_SRAW,
117 0x80000000,
118 3,
119 0xf0000000
120 },
121 {
122 OP_SRAW,
123 0x8000,
124 3,
125 0x1000
126 },
127 };
128 static unsigned int cpu_post_threex_size =
129 sizeof (cpu_post_threex_table) / sizeof (struct cpu_post_threex_s);
130
131 int cpu_post_test_threex (void)
132 {
133 int ret = 0;
134 unsigned int i, reg;
135 int flag = disable_interrupts();
136
137 for (i = 0; i < cpu_post_threex_size && ret == 0; i++)
138 {
139 struct cpu_post_threex_s *test = cpu_post_threex_table + i;
140
141 for (reg = 0; reg < 32 && ret == 0; reg++)
142 {
143 unsigned int reg0 = (reg + 0) % 32;
144 unsigned int reg1 = (reg + 1) % 32;
145 unsigned int reg2 = (reg + 2) % 32;
146 unsigned int stk = reg < 16 ? 31 : 15;
147 unsigned long code[] =
148 {
149 ASM_STW(stk, 1, -4),
150 ASM_ADDI(stk, 1, -24),
151 ASM_STW(3, stk, 12),
152 ASM_STW(4, stk, 16),
153 ASM_STW(reg0, stk, 8),
154 ASM_STW(reg1, stk, 4),
155 ASM_STW(reg2, stk, 0),
156 ASM_LWZ(reg1, stk, 12),
157 ASM_LWZ(reg0, stk, 16),
158 ASM_12X(test->cmd, reg2, reg1, reg0),
159 ASM_STW(reg2, stk, 12),
160 ASM_LWZ(reg2, stk, 0),
161 ASM_LWZ(reg1, stk, 4),
162 ASM_LWZ(reg0, stk, 8),
163 ASM_LWZ(3, stk, 12),
164 ASM_ADDI(1, stk, 24),
165 ASM_LWZ(stk, 1, -4),
166 ASM_BLR,
167 };
168 unsigned long codecr[] =
169 {
170 ASM_STW(stk, 1, -4),
171 ASM_ADDI(stk, 1, -24),
172 ASM_STW(3, stk, 12),
173 ASM_STW(4, stk, 16),
174 ASM_STW(reg0, stk, 8),
175 ASM_STW(reg1, stk, 4),
176 ASM_STW(reg2, stk, 0),
177 ASM_LWZ(reg1, stk, 12),
178 ASM_LWZ(reg0, stk, 16),
179 ASM_12X(test->cmd, reg2, reg1, reg0) | BIT_C,
180 ASM_STW(reg2, stk, 12),
181 ASM_LWZ(reg2, stk, 0),
182 ASM_LWZ(reg1, stk, 4),
183 ASM_LWZ(reg0, stk, 8),
184 ASM_LWZ(3, stk, 12),
185 ASM_ADDI(1, stk, 24),
186 ASM_LWZ(stk, 1, -4),
187 ASM_BLR,
188 };
189 ulong res;
190 ulong cr;
191
192 if (ret == 0)
193 {
194 cr = 0;
195 cpu_post_exec_22 (code, & cr, & res, test->op1, test->op2);
196
197 ret = res == test->res && cr == 0 ? 0 : -1;
198
199 if (ret != 0)
200 {
201 post_log ("Error at threex test %d !\n", i);
202 }
203 }
204
205 if (ret == 0)
206 {
207 cpu_post_exec_22 (codecr, & cr, & res, test->op1, test->op2);
208
209 ret = res == test->res &&
210 (cr & 0xe0000000) == cpu_post_makecr (res) ? 0 : -1;
211
212 if (ret != 0)
213 {
214 post_log ("Error at threex test %d !\n", i);
215 }
216 }
217 }
218 }
219
220 if (flag)
221 enable_interrupts();
222
223 return ret;
224 }
225
226 #endif