summaryrefslogtreecommitdiffstats
path: root/post/lib_ppc/twox.c
blob: d6714f9861c18998c642f92f47967faccce71c7a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
/*
 * (C) Copyright 2002
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <common.h>

/*
 * CPU test
 * Binary instructions		instr rA,rS
 *
 * Logic instructions:		cntlzw
 * Arithmetic instructions:	extsb, extsh

 * The test contains a pre-built table of instructions, operands and
 * expected results. For each table entry, the test will cyclically use
 * different sets of operand registers and result registers.
 */

#include <post.h>
#include "cpu_asm.h"

#if CONFIG_POST & CONFIG_SYS_POST_CPU

extern void cpu_post_exec_21 (ulong *code, ulong *cr, ulong *res, ulong op1);
extern ulong cpu_post_makecr (long v);

static struct cpu_post_twox_s
{
    ulong cmd;
    ulong op;
    ulong res;
} cpu_post_twox_table[] =
{
    {
	OP_EXTSB,
	3,
	3
    },
    {
	OP_EXTSB,
	0xff,
	-1
    },
    {
	OP_EXTSH,
	3,
	3
    },
    {
	OP_EXTSH,
	0xff,
	0xff
    },
    {
	OP_EXTSH,
	0xffff,
	-1
    },
    {
	OP_CNTLZW,
	0x000fffff,
	12
    },
};
static unsigned int cpu_post_twox_size =
    sizeof (cpu_post_twox_table) / sizeof (struct cpu_post_twox_s);

int cpu_post_test_twox (void)
{
    int ret = 0;
    unsigned int i, reg;
    int flag = disable_interrupts();

    for (i = 0; i < cpu_post_twox_size && ret == 0; i++)
    {
	struct cpu_post_twox_s *test = cpu_post_twox_table + i;

	for (reg = 0; reg < 32 && ret == 0; reg++)
	{
	    unsigned int reg0 = (reg + 0) % 32;
	    unsigned int reg1 = (reg + 1) % 32;
	    unsigned int stk = reg < 16 ? 31 : 15;
	    unsigned long code[] =
	    {
		ASM_STW(stk, 1, -4),
		ASM_ADDI(stk, 1, -16),
		ASM_STW(3, stk, 8),
		ASM_STW(reg0, stk, 4),
		ASM_STW(reg1, stk, 0),
		ASM_LWZ(reg0, stk, 8),
		ASM_11X(test->cmd, reg1, reg0),
		ASM_STW(reg1, stk, 8),
		ASM_LWZ(reg1, stk, 0),
		ASM_LWZ(reg0, stk, 4),
		ASM_LWZ(3, stk, 8),
		ASM_ADDI(1, stk, 16),
		ASM_LWZ(stk, 1, -4),
		ASM_BLR,
	    };
	    unsigned long codecr[] =
	    {
		ASM_STW(stk, 1, -4),
		ASM_ADDI(stk, 1, -16),
		ASM_STW(3, stk, 8),
		ASM_STW(reg0, stk, 4),
		ASM_STW(reg1, stk, 0),
		ASM_LWZ(reg0, stk, 8),
		ASM_11X(test->cmd, reg1, reg0) | BIT_C,
		ASM_STW(reg1, stk, 8),
		ASM_LWZ(reg1, stk, 0),
		ASM_LWZ(reg0, stk, 4),
		ASM_LWZ(3, stk, 8),
		ASM_ADDI(1, stk, 16),
		ASM_LWZ(stk, 1, -4),
		ASM_BLR,
	    };
	    ulong res;
	    ulong cr;

	    if (ret == 0)
	    {
		cr = 0;
		cpu_post_exec_21 (code, & cr, & res, test->op);

		ret = res == test->res && cr == 0 ? 0 : -1;

		if (ret != 0)
		{
	            post_log ("Error at twox test %d !\n", i);
		}
	    }

	    if (ret == 0)
	    {
		cpu_post_exec_21 (codecr, & cr, & res, test->op);

		ret = res == test->res &&
		      (cr & 0xe0000000) == cpu_post_makecr (res) ? 0 : -1;

		if (ret != 0)
		{
	            post_log ("Error at twox test %d !\n", i);
	        }
	    }
	}
    }

    if (flag)
	enable_interrupts();

    return ret;
}

#endif
OpenPOWER on IntegriCloud