post/lib_ppc/cmpi.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  * Integer compare instructions:        cmpwi, cmplwi
  29  *
  30  * To verify these instructions the test runs them with
  31  * different combinations of operands, reads the condition
  32  * register value and compares it with the expected one.
  33  * The test contains a pre-built table
  34  * containing the description of each test case: the instruction,
  35  * the values of the operands, the condition field to save
  36  * the result in and the expected result.
  37  */
  38
  39 #ifdef CONFIG_POST
  40
  41 #include <post.h>
  42 #include "cpu_asm.h"
  43
  44 #if CONFIG_POST & CFG_POST_CPU
  45
  46 extern void cpu_post_exec_11 (ulong *code, ulong *res, ulong op1);
  47
  48 static struct cpu_post_cmpi_s
  49 {
  50     ulong cmd;
  51     ulong op1;
  52     ushort op2;
  53     ulong cr;
  54     ulong res;
  55 } cpu_post_cmpi_table[] =
  56 {
  57     {
  58         OP_CMPWI,
  59         123,
  60         123,
  61         2,
  62         0x02
  63     },
  64     {
  65         OP_CMPWI,
  66         123,
  67         133,
  68         3,
  69         0x08
  70     },
  71     {
  72         OP_CMPWI,
  73         123,
  74         -133,
  75         4,
  76         0x04
  77     },
  78     {
  79         OP_CMPLWI,
  80         123,
  81         123,
  82         2,
  83         0x02
  84     },
  85     {
  86         OP_CMPLWI,
  87         123,
  88         -133,
  89         3,
  90         0x08
  91     },
  92     {
  93         OP_CMPLWI,
  94         123,
  95         113,
  96         4,
  97         0x04
  98     },
  99 };
 100 static unsigned int cpu_post_cmpi_size =
 101     sizeof (cpu_post_cmpi_table) / sizeof (struct cpu_post_cmpi_s);
 102
 103 int cpu_post_test_cmpi (void)
 104 {
 105     int ret = 0;
 106     unsigned int i;
 107
 108     for (i = 0; i < cpu_post_cmpi_size && ret == 0; i++)
 109     {
 110         struct cpu_post_cmpi_s *test = cpu_post_cmpi_table + i;
 111         unsigned long code[] =
 112         {
 113             ASM_1IC(test->cmd, test->cr, 3, test->op2),
 114             ASM_MFCR(3),
 115             ASM_BLR
 116         };
 117         ulong res;
 118
 119         cpu_post_exec_11 (code, & res, test->op1);
 120
 121         ret = ((res >> (28 - 4 * test->cr)) & 0xe) == test->res ? 0 : -1;
 122
 123         if (ret != 0)
 124         {
 125             post_log ("Error at cmpi test %d !\n", i);
 126         }
 127     }
 128
 129     return ret;
 130 }
 131
 132 #endif
 133 #endif