post/lib_ppc/threex.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,rB
  29  *
  30  * Logic instructions:          or, orc, xor, nand, nor, eqv
  31  * Shift instructions:          slw, srw, sraw
  32  *
  33  * The test contains a pre-built table of instructions, operands and
  34  * expected results. For each table entry, the test will cyclically use
  35  * different sets of operand registers and result registers.
  36  */
  37
  38 #include <post.h>
  39 #include "cpu_asm.h"
  40
  41 #if CONFIG_POST & CONFIG_SYS_POST_CPU
  42
  43 extern void cpu_post_exec_22 (ulong *code, ulong *cr, ulong *res, ulong op1,
  44     ulong op2);
  45 extern ulong cpu_post_makecr (long v);
  46
  47 static struct cpu_post_threex_s
  48 {
  49     ulong cmd;
  50     ulong op1;
  51     ulong op2;
  52     ulong res;
  53 } cpu_post_threex_table[] =
  54 {
  55     {
  56         OP_OR,
  57         0x1234,
  58         0x5678,
  59         0x1234 | 0x5678
  60     },
  61     {
  62         OP_ORC,
  63         0x1234,
  64         0x5678,
  65         0x1234 | ~0x5678
  66     },
  67     {
  68         OP_XOR,
  69         0x1234,
  70         0x5678,
  71         0x1234 ^ 0x5678
  72     },
  73     {
  74         OP_NAND,
  75         0x1234,
  76         0x5678,
  77         ~(0x1234 & 0x5678)
  78     },
  79     {
  80         OP_NOR,
  81         0x1234,
  82         0x5678,
  83         ~(0x1234 | 0x5678)
  84     },
  85     {
  86         OP_EQV,
  87         0x1234,
  88         0x5678,
  89         ~(0x1234 ^ 0x5678)
  90     },
  91     {
  92         OP_SLW,
  93         0x80,
  94         16,
  95         0x800000
  96     },
  97     {
  98         OP_SLW,
  99         0x80,
 100         32,
 101         0
 102     },
 103     {
 104         OP_SRW,
 105         0x800000,
 106         16,
 107         0x80
 108     },
 109     {
 110         OP_SRW,
 111         0x800000,
 112         32,
 113         0
 114     },
 115     {
 116         OP_SRAW,
 117         0x80000000,
 118         3,
 119         0xf0000000
 120     },
 121     {
 122         OP_SRAW,
 123         0x8000,
 124         3,
 125         0x1000
 126     },
 127 };
 128 static unsigned int cpu_post_threex_size =
 129     sizeof (cpu_post_threex_table) / sizeof (struct cpu_post_threex_s);
 130
 131 int cpu_post_test_threex (void)
 132 {
 133     int ret = 0;
 134     unsigned int i, reg;
 135     int flag = disable_interrupts();
 136
 137     for (i = 0; i < cpu_post_threex_size && ret == 0; i++)
 138     {
 139         struct cpu_post_threex_s *test = cpu_post_threex_table + i;
 140
 141         for (reg = 0; reg < 32 && ret == 0; reg++)
 142         {
 143             unsigned int reg0 = (reg + 0) % 32;
 144             unsigned int reg1 = (reg + 1) % 32;
 145             unsigned int reg2 = (reg + 2) % 32;
 146             unsigned int stk = reg < 16 ? 31 : 15;
 147             unsigned long code[] =
 148             {
 149                 ASM_STW(stk, 1, -4),
 150                 ASM_ADDI(stk, 1, -24),
 151                 ASM_STW(3, stk, 12),
 152                 ASM_STW(4, stk, 16),
 153                 ASM_STW(reg0, stk, 8),
 154                 ASM_STW(reg1, stk, 4),
 155                 ASM_STW(reg2, stk, 0),
 156                 ASM_LWZ(reg1, stk, 12),
 157                 ASM_LWZ(reg0, stk, 16),
 158                 ASM_12X(test->cmd, reg2, reg1, reg0),
 159                 ASM_STW(reg2, stk, 12),
 160                 ASM_LWZ(reg2, stk, 0),
 161                 ASM_LWZ(reg1, stk, 4),
 162                 ASM_LWZ(reg0, stk, 8),
 163                 ASM_LWZ(3, stk, 12),
 164                 ASM_ADDI(1, stk, 24),
 165                 ASM_LWZ(stk, 1, -4),
 166                 ASM_BLR,
 167             };
 168             unsigned long codecr[] =
 169             {
 170                 ASM_STW(stk, 1, -4),
 171                 ASM_ADDI(stk, 1, -24),
 172                 ASM_STW(3, stk, 12),
 173                 ASM_STW(4, stk, 16),
 174                 ASM_STW(reg0, stk, 8),
 175                 ASM_STW(reg1, stk, 4),
 176                 ASM_STW(reg2, stk, 0),
 177                 ASM_LWZ(reg1, stk, 12),
 178                 ASM_LWZ(reg0, stk, 16),
 179                 ASM_12X(test->cmd, reg2, reg1, reg0) | BIT_C,
 180                 ASM_STW(reg2, stk, 12),
 181                 ASM_LWZ(reg2, stk, 0),
 182                 ASM_LWZ(reg1, stk, 4),
 183                 ASM_LWZ(reg0, stk, 8),
 184                 ASM_LWZ(3, stk, 12),
 185                 ASM_ADDI(1, stk, 24),
 186                 ASM_LWZ(stk, 1, -4),
 187                 ASM_BLR,
 188             };
 189             ulong res;
 190             ulong cr;
 191
 192             if (ret == 0)
 193             {
 194                 cr = 0;
 195                 cpu_post_exec_22 (code, & cr, & res, test->op1, test->op2);
 196
 197                 ret = res == test->res && cr == 0 ? 0 : -1;
 198
 199                 if (ret != 0)
 200                 {
 201                     post_log ("Error at threex test %d !\n", i);
 202                 }
 203             }
 204
 205             if (ret == 0)
 206             {
 207                 cpu_post_exec_22 (codecr, & cr, & res, test->op1, test->op2);
 208
 209                 ret = res == test->res &&
 210                       (cr & 0xe0000000) == cpu_post_makecr (res) ? 0 : -1;
 211
 212                 if (ret != 0)
 213                 {
 214                     post_log ("Error at threex test %d !\n", i);
 215                 }
 216             }
 217         }
 218     }
 219
 220     if (flag)
 221         enable_interrupts();
 222
 223     return ret;
 224 }
 225
 226 #endif