post/lib_powerpc/multi.c

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