post/lib_ppc/threei.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  * Ternary instructions         instr rA,rS,UIMM
  29  *
  30  * Logic instructions:          ori, oris, xori, xoris
  31  *
  32  * The test contains a pre-built table of instructions, operands and
  33  * expected results. For each table entry, the test will cyclically use
  34  * different sets of operand registers and result registers.
  35  */
  36
  37 #ifdef CONFIG_POST
  38
  39 #include <post.h>
  40 #include "cpu_asm.h"
  41
  42 #if CONFIG_POST & CFG_POST_CPU
  43
  44 extern void cpu_post_exec_21 (ulong *code, ulong *cr, ulong *res, ulong op);
  45 extern ulong cpu_post_makecr (long v);
  46
  47 static struct cpu_post_threei_s
  48 {
  49     ulong cmd;
  50     ulong op1;
  51     ushort op2;
  52     ulong res;
  53 } cpu_post_threei_table[] =
  54 {
  55     {
  56         OP_ORI,
  57         0x80000000,
  58         0xffff,
  59         0x8000ffff
  60     },
  61     {
  62         OP_ORIS,
  63         0x00008000,
  64         0xffff,
  65         0xffff8000
  66     },
  67     {
  68         OP_XORI,
  69         0x8000ffff,
  70         0xffff,
  71         0x80000000
  72     },
  73     {
  74         OP_XORIS,
  75         0x00008000,
  76         0xffff,
  77         0xffff8000
  78     },
  79 };
  80 static unsigned int cpu_post_threei_size =
  81     sizeof (cpu_post_threei_table) / sizeof (struct cpu_post_threei_s);
  82
  83 int cpu_post_test_threei (void)
  84 {
  85     int ret = 0;
  86     unsigned int i, reg;
  87     int flag = disable_interrupts();
  88
  89     for (i = 0; i < cpu_post_threei_size && ret == 0; i++)
  90     {
  91         struct cpu_post_threei_s *test = cpu_post_threei_table + i;
  92
  93         for (reg = 0; reg < 32 && ret == 0; reg++)
  94         {
  95             unsigned int reg0 = (reg + 0) % 32;
  96             unsigned int reg1 = (reg + 1) % 32;
  97             unsigned int stk = reg < 16 ? 31 : 15;
  98             unsigned long code[] =
  99             {
 100                 ASM_STW(stk, 1, -4),
 101                 ASM_ADDI(stk, 1, -16),
 102                 ASM_STW(3, stk, 8),
 103                 ASM_STW(reg0, stk, 4),
 104                 ASM_STW(reg1, stk, 0),
 105                 ASM_LWZ(reg0, stk, 8),
 106                 ASM_11IX(test->cmd, reg1, reg0, test->op2),
 107                 ASM_STW(reg1, stk, 8),
 108                 ASM_LWZ(reg1, stk, 0),
 109                 ASM_LWZ(reg0, stk, 4),
 110                 ASM_LWZ(3, stk, 8),
 111                 ASM_ADDI(1, stk, 16),
 112                 ASM_LWZ(stk, 1, -4),
 113                 ASM_BLR,
 114             };
 115             ulong res;
 116             ulong cr;
 117
 118             cr = 0;
 119             cpu_post_exec_21 (code, & cr, & res, test->op1);
 120
 121             ret = res == test->res && cr == 0 ? 0 : -1;
 122
 123             if (ret != 0)
 124             {
 125                 post_log ("Error at threei test %d !\n", i);
 126             }
 127         }
 128     }
 129
 130     if (flag)
 131         enable_interrupts();
 132
 133     return ret;
 134 }
 135
 136 #endif
 137 #endif