post/lib_powerpc/multi.c

   1 /*
   2  * (C) Copyright 2002
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9
  10 /*
  11  * CPU test
  12  * Load/store multiple word instructions:       lmw, stmw
  13  *
  14  * 27 consecutive words are loaded from a source memory buffer
  15  * into GPRs r5 through r31. After that, 27 consecutive words are stored
  16  * from the GPRs r5 through r31 into a target memory buffer. The contents
  17  * of the source and target buffers are then compared.
  18  */
  19
  20 #include <post.h>
  21 #include "cpu_asm.h"
  22
  23 #if CONFIG_POST & CONFIG_SYS_POST_CPU
  24
  25 extern void cpu_post_exec_02(ulong *code, ulong op1, ulong op2);
  26
  27 int cpu_post_test_multi(void)
  28 {
  29         int ret = 0;
  30         unsigned int i;
  31         ulong src[27], dst[27];
  32         int flag = disable_interrupts();
  33
  34         ulong code[] = {
  35                 ASM_LMW(5, 3, 0),       /* lmw  r5, 0(r3)       */
  36                 ASM_STMW(5, 4, 0),      /* stmr r5, 0(r4)       */
  37                 ASM_BLR,                /* blr                  */
  38         };
  39
  40         for (i = 0; i < ARRAY_SIZE(src); ++i) {
  41                 src[i] = i;
  42                 dst[i] = 0;
  43         }
  44
  45         cpu_post_exec_02(code, (ulong) src, (ulong) dst);
  46
  47         ret = memcmp(src, dst, sizeof(dst)) == 0 ? 0 : -1;
  48
  49         if (ret != 0)
  50                 post_log("Error at multi test !\n");
  51
  52         if (flag)
  53                 enable_interrupts();
  54
  55         return ret;
  56 }
  57
  58 #endif