post/lib_ppc/multi.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 multiple word instructions:       lmw, stmw
  29  *
  30  * 26 consecutive words are loaded from a source memory buffer
  31  * into GPRs r6 through r31. After that, 26 consecutive words are stored
  32  * from the GPRs r6 through r31 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
  45 int cpu_post_test_multi (void)
  46 {
  47     int ret = 0;
  48     unsigned int i;
  49
  50     if (ret == 0)
  51     {
  52         ulong src [26], dst [26];
  53
  54         ulong code[] =
  55         {
  56             ASM_LMW(5, 3, 0),
  57             ASM_STMW(5, 4, 0),
  58             ASM_BLR,
  59         };
  60
  61         for (i = 0; i < sizeof(src) / sizeof(src[0]); i ++)
  62         {
  63             src[i] = i;
  64             dst[i] = 0;
  65         }
  66
  67         cpu_post_exec_02(code, (ulong)src, (ulong)dst);
  68
  69         ret = memcmp(src, dst, sizeof(dst)) == 0 ? 0 : -1;
  70     }
  71
  72     if (ret != 0)
  73     {
  74         post_log ("Error at multi test !\n");
  75     }
  76
  77     return ret;
  78 }
  79
  80 #endif
  81 #endif