LXR uboot/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
  25extern void cpu_post_exec_02 (ulong *code, ulong op1, ulong op2);
  26extern void cpu_post_exec_04 (ulong *code, ulong op1, ulong op2, ulong op3,
  27    ulong op4);
  28
  29#include <bedbug/regs.h>
  30int 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
  92