two.c
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/*
* (C) Copyright 2002
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
/*
* CPU test
* Binary instructions instr rD,rA
*
* Logic instructions: neg
* Arithmetic instructions: addme, addze, subfme, subfze
* 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_two_s
{
ulong cmd;
ulong op;
ulong res;
} cpu_post_two_table[] =
{
{
OP_NEG,
3,
-3
},
{
OP_NEG,
5,
-5
},
{
OP_ADDME,
6,
5
},
{
OP_ADDZE,
5,
5
},
{
OP_SUBFME,
6,
~6 - 1
},
{
OP_SUBFZE,
5,
~5
},
};
static unsigned int cpu_post_two_size = ARRAY_SIZE(cpu_post_two_table);
int cpu_post_test_two (void)
{
int ret = 0;
unsigned int i, reg;
int flag = disable_interrupts();
for (i = 0; i < cpu_post_two_size && ret == 0; i++)
{
struct cpu_post_two_s *test = cpu_post_two_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_11(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_11(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 two 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 two test %d !\n", i);
}
}
}
}
if (flag)
enable_interrupts();
return ret;
}
#endif