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/*
* (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
* Integer compare instructions: cmpwi, cmplwi
*
* To verify these instructions the test runs them with
* different combinations of operands, reads the condition
* register value and compares it with the expected one.
* The test contains a pre-built table
* containing the description of each test case: the instruction,
* the values of the operands, the condition field to save
* the result in and the expected result.
*/
#include <post.h>
#include "cpu_asm.h"
#if CONFIG_POST & CONFIG_SYS_POST_CPU
extern void cpu_post_exec_11 (ulong *code, ulong *res, ulong op1);
static struct cpu_post_cmpi_s
{
ulong cmd;
ulong op1;
ushort op2;
ulong cr;
ulong res;
} cpu_post_cmpi_table[] =
{
{
OP_CMPWI,
123,
123,
2,
0x02
},
{
OP_CMPWI,
123,
133,
3,
0x08
},
{
OP_CMPWI,
123,
-133,
4,
0x04
},
{
OP_CMPLWI,
123,
123,
2,
0x02
},
{
OP_CMPLWI,
123,
-133,
3,
0x08
},
{
OP_CMPLWI,
123,
113,
4,
0x04
},
};
static unsigned int cpu_post_cmpi_size =
sizeof (cpu_post_cmpi_table) / sizeof (struct cpu_post_cmpi_s);
int cpu_post_test_cmpi (void)
{
int ret = 0;
unsigned int i;
int flag = disable_interrupts();
for (i = 0; i < cpu_post_cmpi_size && ret == 0; i++)
{
struct cpu_post_cmpi_s *test = cpu_post_cmpi_table + i;
unsigned long code[] =
{
ASM_1IC(test->cmd, test->cr, 3, test->op2),
ASM_MFCR(3),
ASM_BLR
};
ulong res;
cpu_post_exec_11 (code, & res, test->op1);
ret = ((res >> (28 - 4 * test->cr)) & 0xe) == test->res ? 0 : -1;
if (ret != 0)
{
post_log ("Error at cmpi test %d !\n", i);
}
}
if (flag)
enable_interrupts();
return ret;
}
#endif
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