string.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
* Load/store string instructions: lswi, stswi, lswx, stswx
*
* Several consecutive bytes from a source memory buffer are loaded
* left to right into GPRs. After that, the bytes are stored
* from the GPRs into a target memory buffer. The contents
* of the source and target buffers are then compared.
*/
#include <post.h>
#include "cpu_asm.h"
#if CONFIG_POST & CONFIG_SYS_POST_CPU
extern void cpu_post_exec_02 (ulong *code, ulong op1, ulong op2);
extern void cpu_post_exec_04 (ulong *code, ulong op1, ulong op2, ulong op3,
ulong op4);
#include <bedbug/regs.h>
int cpu_post_test_string (void)
{
int ret = 0;
unsigned int i;
int flag = disable_interrupts();
if (ret == 0)
{
char src [31], dst [31];
ulong code[] =
{
ASM_LSWI(5, 3, 31),
ASM_STSWI(5, 4, 31),
ASM_BLR,
};
for (i = 0; i < sizeof(src); i ++)
{
src[i] = (char) i;
dst[i] = 0;
}
cpu_post_exec_02(code, (ulong)src, (ulong)dst);
ret = memcmp(src, dst, sizeof(dst)) == 0 ? 0 : -1;
}
if (ret == 0)
{
char src [95], dst [95];
ulong code[] =
{
ASM_LSWX(8, 3, 5),
ASM_STSWX(8, 4, 5),
ASM_BLR,
};
for (i = 0; i < sizeof(src); i ++)
{
src[i] = (char) i;
dst[i] = 0;
}
cpu_post_exec_04(code, (ulong)src, (ulong)dst, 0, sizeof(src));
ret = memcmp(src, dst, sizeof(dst)) == 0 ? 0 : -1;
}
if (ret != 0)
{
post_log ("Error at string test !\n");
}
if (flag)
enable_interrupts();
return ret;
}
#endif