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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;
    
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        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");
        }
    
    
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        if (flag)
    	enable_interrupts();