LXR uboot/post/lib_powerpc/rlwinm.c

   1/*
   2 * (C) Copyright 2002
   3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4 *
   5 * SPDX-License-Identifier:     GPL-2.0+
   6 */
   7
   8#include <common.h>
   9
  10/*
  11 * CPU test
  12 * Shift instructions:          rlwinm
  13 *
  14 * The test contains a pre-built table of instructions, operands and
  15 * expected results. For each table entry, the test will cyclically use
  16 * different sets of operand registers and result registers.
  17 */
  18
  19#include <post.h>
  20#include "cpu_asm.h"
  21
  22#if CONFIG_POST & CONFIG_SYS_POST_CPU
  23
  24extern void cpu_post_exec_21 (ulong *code, ulong *cr, ulong *res, ulong op1);
  25extern ulong cpu_post_makecr (long v);
  26
  27static struct cpu_post_rlwinm_s
  28{
  29    ulong cmd;
  30    ulong op1;
  31    uchar op2;
  32    uchar mb;
  33    uchar me;
  34    ulong res;
  35} cpu_post_rlwinm_table[] =
  36{
  37   {
  38        OP_RLWINM,
  39        0xffff0000,
  40        24,
  41        16,
  42        23,
  43        0x0000ff00
  44   },
  45};
  46static unsigned int cpu_post_rlwinm_size = ARRAY_SIZE(cpu_post_rlwinm_table);
  47
  48int cpu_post_test_rlwinm (void)
  49{
  50    int ret = 0;
  51    unsigned int i, reg;
  52    int flag = disable_interrupts();
  53
  54    for (i = 0; i < cpu_post_rlwinm_size && ret == 0; i++)
  55    {
  56        struct cpu_post_rlwinm_s *test = cpu_post_rlwinm_table + i;
  57
  58        for (reg = 0; reg < 32 && ret == 0; reg++)
  59        {
  60            unsigned int reg0 = (reg + 0) % 32;
  61            unsigned int reg1 = (reg + 1) % 32;
  62            unsigned int stk = reg < 16 ? 31 : 15;
  63            unsigned long code[] =
  64            {
  65                ASM_STW(stk, 1, -4),
  66                ASM_ADDI(stk, 1, -16),
  67                ASM_STW(3, stk, 8),
  68                ASM_STW(reg0, stk, 4),
  69                ASM_STW(reg1, stk, 0),
  70                ASM_LWZ(reg0, stk, 8),
  71                ASM_113(test->cmd, reg1, reg0, test->op2, test->mb, test->me),
  72                ASM_STW(reg1, stk, 8),
  73                ASM_LWZ(reg1, stk, 0),
  74                ASM_LWZ(reg0, stk, 4),
  75                ASM_LWZ(3, stk, 8),
  76                ASM_ADDI(1, stk, 16),
  77                ASM_LWZ(stk, 1, -4),
  78                ASM_BLR,
  79            };
  80            unsigned long codecr[] =
  81            {
  82                ASM_STW(stk, 1, -4),
  83                ASM_ADDI(stk, 1, -16),
  84                ASM_STW(3, stk, 8),
  85                ASM_STW(reg0, stk, 4),
  86                ASM_STW(reg1, stk, 0),
  87                ASM_LWZ(reg0, stk, 8),
  88                ASM_113(test->cmd, reg1, reg0, test->op2, test->mb,
  89                    test->me) | BIT_C,
  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            ulong res;
  99            ulong cr;
 100
 101            if (ret == 0)
 102            {
 103                cr = 0;
 104                cpu_post_exec_21 (code, & cr, & res, test->op1);
 105
 106                ret = res == test->res && cr == 0 ? 0 : -1;
 107
 108                if (ret != 0)
 109                {
 110                    post_log ("Error at rlwinm test %d !\n", i);
 111                }
 112            }
 113
 114            if (ret == 0)
 115            {
 116                cpu_post_exec_21 (codecr, & cr, & res, test->op1);
 117
 118                ret = res == test->res &&
 119                      (cr & 0xe0000000) == cpu_post_makecr (res) ? 0 : -1;
 120
 121                if (ret != 0)
 122                {
 123                    post_log ("Error at rlwinm test %d !\n", i);
 124                }
 125            }
 126        }
 127    }
 128
 129    if (flag)
 130        enable_interrupts();
 131
 132    return ret;
 133}
 134
 135#endif
 136