post/lib_ppc/string.c

   1 /*
   2  * (C) Copyright 2002
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25
  26 /*
  27  * CPU test
  28  * Load/store string instructions:      lswi, stswi, lswx, stswx
  29  *
  30  * Several consecutive bytes from a source memory buffer are loaded
  31  * left to right into GPRs. After that, the bytes are stored
  32  * from the GPRs into a target memory buffer. The contents
  33  * of the source and target buffers are then compared.
  34  */
  35
  36 #ifdef CONFIG_POST
  37
  38 #include <post.h>
  39 #include "cpu_asm.h"
  40
  41 #if CONFIG_POST & CFG_POST_CPU
  42
  43 extern void cpu_post_exec_02 (ulong *code, ulong op1, ulong op2);
  44 extern void cpu_post_exec_04 (ulong *code, ulong op1, ulong op2, ulong op3,
  45     ulong op4);
  46
  47 #include <bedbug/regs.h>
  48 int cpu_post_test_string (void)
  49 {
  50     int ret = 0;
  51     unsigned int i;
  52
  53     if (ret == 0)
  54     {
  55         char src [31], dst [31];
  56
  57         ulong code[] =
  58         {
  59             ASM_LSWI(5, 3, 31),
  60             ASM_STSWI(5, 4, 31),
  61             ASM_BLR,
  62         };
  63
  64         for (i = 0; i < sizeof(src); i ++)
  65         {
  66             src[i] = (char) i;
  67             dst[i] = 0;
  68         }
  69
  70         cpu_post_exec_02(code, (ulong)src, (ulong)dst);
  71
  72         ret = memcmp(src, dst, sizeof(dst)) == 0 ? 0 : -1;
  73     }
  74
  75     if (ret == 0)
  76     {
  77         char src [95], dst [95];
  78
  79         ulong code[] =
  80         {
  81             ASM_LSWX(8, 3, 5),
  82             ASM_STSWX(8, 4, 5),
  83             ASM_BLR,
  84         };
  85
  86         for (i = 0; i < sizeof(src); i ++)
  87         {
  88             src[i] = (char) i;
  89             dst[i] = 0;
  90         }
  91
  92         cpu_post_exec_04(code, (ulong)src, (ulong)dst, 0, sizeof(src));
  93
  94         ret = memcmp(src, dst, sizeof(dst)) == 0 ? 0 : -1;
  95     }
  96
  97     if (ret != 0)
  98     {
  99         post_log ("Error at string test !\n");
 100     }
 101
 102     return ret;
 103 }
 104
 105 #endif
 106 #endif