post/lib_powerpc/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  * 27 consecutive words are loaded from a source memory buffer
  31  * into GPRs r5 through r31. After that, 27 consecutive words are stored
  32  * from the GPRs r5 through r31 into a target memory buffer. The contents
  33  * of the source and target buffers are then compared.
  34  */
  35
  36 #include <post.h>
  37 #include "cpu_asm.h"
  38
  39 #if CONFIG_POST & CONFIG_SYS_POST_CPU
  40
  41 extern void cpu_post_exec_02(ulong *code, ulong op1, ulong op2);
  42
  43 int cpu_post_test_multi(void)
  44 {
  45         int ret = 0;
  46         unsigned int i;
  47         ulong src[27], dst[27];
  48         int flag = disable_interrupts();
  49
  50         ulong code[] = {
  51                 ASM_LMW(5, 3, 0),       /* lmw  r5, 0(r3)       */
  52                 ASM_STMW(5, 4, 0),      /* stmr r5, 0(r4)       */
  53                 ASM_BLR,                /* blr                  */
  54         };
  55
  56         for (i = 0; i < ARRAY_SIZE(src); ++i) {
  57                 src[i] = i;
  58                 dst[i] = 0;
  59         }
  60
  61         cpu_post_exec_02(code, (ulong) src, (ulong) dst);
  62
  63         ret = memcmp(src, dst, sizeof(dst)) == 0 ? 0 : -1;
  64
  65         if (ret != 0)
  66                 post_log("Error at multi test !\n");
  67
  68         if (flag)
  69                 enable_interrupts();
  70
  71         return ret;
  72 }
  73
  74 #endif