LXR uboot/post/lib_powerpc/srawi.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 * Shift instructions:          srawi
  29 *
  30 * The test contains a pre-built table of instructions, operands and
  31 * expected results. For each table entry, the test will cyclically use
  32 * different sets of operand registers and result registers.
  33 */
  34
  35#include <post.h>
  36#include "cpu_asm.h"
  37
  38#if CONFIG_POST & CONFIG_SYS_POST_CPU
  39
  40extern void cpu_post_exec_21 (ulong *code, ulong *cr, ulong *res, ulong op);
  41extern ulong cpu_post_makecr (long v);
  42
  43static struct cpu_post_srawi_s
  44{
  45    ulong cmd;
  46    ulong op1;
  47    uchar op2;
  48    ulong res;
  49} cpu_post_srawi_table[] =
  50{
  51    {
  52        OP_SRAWI,
  53        0x8000,
  54        3,
  55        0x1000
  56    },
  57    {
  58        OP_SRAWI,
  59        0x80000000,
  60        3,
  61        0xf0000000
  62    },
  63};
  64static unsigned int cpu_post_srawi_size = ARRAY_SIZE(cpu_post_srawi_table);
  65
  66int cpu_post_test_srawi (void)
  67{
  68    int ret = 0;
  69    unsigned int i, reg;
  70    int flag = disable_interrupts();
  71
  72    for (i = 0; i < cpu_post_srawi_size && ret == 0; i++)
  73    {
  74        struct cpu_post_srawi_s *test = cpu_post_srawi_table + i;
  75
  76        for (reg = 0; reg < 32 && ret == 0; reg++)
  77        {
  78            unsigned int reg0 = (reg + 0) % 32;
  79            unsigned int reg1 = (reg + 1) % 32;
  80            unsigned int stk = reg < 16 ? 31 : 15;
  81            unsigned long code[] =
  82            {
  83                ASM_STW(stk, 1, -4),
  84                ASM_ADDI(stk, 1, -16),
  85                ASM_STW(3, stk, 8),
  86                ASM_STW(reg0, stk, 4),
  87                ASM_STW(reg1, stk, 0),
  88                ASM_LWZ(reg0, stk, 8),
  89                ASM_11S(test->cmd, reg1, reg0, test->op2),
  90                ASM_STW(reg1, stk, 8),
  91                ASM_LWZ(reg1, stk, 0),
  92                ASM_LWZ(reg0, stk, 4),
  93                ASM_LWZ(3, stk, 8),
  94                ASM_ADDI(1, stk, 16),
  95                ASM_LWZ(stk, 1, -4),
  96                ASM_BLR,
  97            };
  98            unsigned long codecr[] =
  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_11S(test->cmd, reg1, reg0, test->op2) | BIT_C,
 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            if (ret == 0)
 119            {
 120                cr = 0;
 121                cpu_post_exec_21 (code, & cr, & res, test->op1);
 122
 123                ret = res == test->res && cr == 0 ? 0 : -1;
 124
 125                if (ret != 0)
 126                {
 127                    post_log ("Error at srawi test %d !\n", i);
 128                }
 129            }
 130
 131            if (ret == 0)
 132            {
 133                cpu_post_exec_21 (codecr, & cr, & res, test->op1);
 134
 135                ret = res == test->res &&
 136                      (cr & 0xe0000000) == cpu_post_makecr (res) ? 0 : -1;
 137
 138                if (ret != 0)
 139                {
 140                    post_log ("Error at srawi test %d !\n", i);
 141                }
 142            }
 143        }
 144    }
 145
 146    if (flag)
 147        enable_interrupts();
 148
 149    return ret;
 150}
 151
 152#endif
 153