post/lib_powerpc/string.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 string instructions:      lswi, stswi, lswx, stswx
  13  *
  14  * Several consecutive bytes from a source memory buffer are loaded
  15  * left to right into GPRs. After that, the bytes are stored
  16  * from the GPRs 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 extern void cpu_post_exec_04 (ulong *code, ulong op1, ulong op2, ulong op3,
  27     ulong op4);
  28
  29 #include <bedbug/regs.h>
  30 int cpu_post_test_string (void)
  31 {
  32     int ret = 0;
  33     unsigned int i;
  34     int flag = disable_interrupts();
  35
  36     if (ret == 0)
  37     {
  38         char src [31], dst [31];
  39
  40         ulong code[] =
  41         {
  42             ASM_LSWI(5, 3, 31),
  43             ASM_STSWI(5, 4, 31),
  44             ASM_BLR,
  45         };
  46
  47         for (i = 0; i < sizeof(src); i ++)
  48         {
  49             src[i] = (char) i;
  50             dst[i] = 0;
  51         }
  52
  53         cpu_post_exec_02(code, (ulong)src, (ulong)dst);
  54
  55         ret = memcmp(src, dst, sizeof(dst)) == 0 ? 0 : -1;
  56     }
  57
  58     if (ret == 0)
  59     {
  60         char src [95], dst [95];
  61
  62         ulong code[] =
  63         {
  64             ASM_LSWX(8, 3, 5),
  65             ASM_STSWX(8, 4, 5),
  66             ASM_BLR,
  67         };
  68
  69         for (i = 0; i < sizeof(src); i ++)
  70         {
  71             src[i] = (char) i;
  72             dst[i] = 0;
  73         }
  74
  75         cpu_post_exec_04(code, (ulong)src, (ulong)dst, 0, sizeof(src));
  76
  77         ret = memcmp(src, dst, sizeof(dst)) == 0 ? 0 : -1;
  78     }
  79
  80     if (ret != 0)
  81     {
  82         post_log ("Error at string test !\n");
  83     }
  84
  85     if (flag)
  86         enable_interrupts();
  87
  88     return ret;
  89 }
  90
  91 #endif