LXR uboot/post/lib_powerpc/rlwnm.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:          rlwnm
  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_22 (ulong *code, ulong *cr, ulong *res, ulong op1,
  25    ulong op2);
  26extern ulong cpu_post_makecr (long v);
  27
  28static struct cpu_post_rlwnm_s
  29{
  30    ulong cmd;
  31    ulong op1;
  32    ulong op2;
  33    uchar mb;
  34    uchar me;
  35    ulong res;
  36} cpu_post_rlwnm_table[] =
  37{
  38   {
  39        OP_RLWNM,
  40        0xffff0000,
  41        24,
  42        16,
  43        23,
  44        0x0000ff00
  45   },
  46};
  47static unsigned int cpu_post_rlwnm_size = ARRAY_SIZE(cpu_post_rlwnm_table);
  48
  49int cpu_post_test_rlwnm (void)
  50{
  51    int ret = 0;
  52    unsigned int i, reg;
  53    int flag = disable_interrupts();
  54
  55    for (i = 0; i < cpu_post_rlwnm_size && ret == 0; i++)
  56    {
  57        struct cpu_post_rlwnm_s *test = cpu_post_rlwnm_table + i;
  58
  59        for (reg = 0; reg < 32 && ret == 0; reg++)
  60        {
  61            unsigned int reg0 = (reg + 0) % 32;
  62            unsigned int reg1 = (reg + 1) % 32;
  63            unsigned int reg2 = (reg + 2) % 32;
  64            unsigned int stk = reg < 16 ? 31 : 15;
  65            unsigned long code[] =
  66            {
  67                ASM_STW(stk, 1, -4),
  68                ASM_ADDI(stk, 1, -24),
  69                ASM_STW(3, stk, 12),
  70                ASM_STW(4, stk, 16),
  71                ASM_STW(reg0, stk, 8),
  72                ASM_STW(reg1, stk, 4),
  73                ASM_STW(reg2, stk, 0),
  74                ASM_LWZ(reg1, stk, 12),
  75                ASM_LWZ(reg0, stk, 16),
  76                ASM_122(test->cmd, reg2, reg1, reg0, test->mb, test->me),
  77                ASM_STW(reg2, stk, 12),
  78                ASM_LWZ(reg2, stk, 0),
  79                ASM_LWZ(reg1, stk, 4),
  80                ASM_LWZ(reg0, stk, 8),
  81                ASM_LWZ(3, stk, 12),
  82                ASM_ADDI(1, stk, 24),
  83                ASM_LWZ(stk, 1, -4),
  84                ASM_BLR,
  85            };
  86            unsigned long codecr[] =
  87            {
  88                ASM_STW(stk, 1, -4),
  89                ASM_ADDI(stk, 1, -24),
  90                ASM_STW(3, stk, 12),
  91                ASM_STW(4, stk, 16),
  92                ASM_STW(reg0, stk, 8),
  93                ASM_STW(reg1, stk, 4),
  94                ASM_STW(reg2, stk, 0),
  95                ASM_LWZ(reg1, stk, 12),
  96                ASM_LWZ(reg0, stk, 16),
  97                ASM_122(test->cmd, reg2, reg1, reg0, test->mb, test->me) |
  98                    BIT_C,
  99                ASM_STW(reg2, stk, 12),
 100                ASM_LWZ(reg2, stk, 0),
 101                ASM_LWZ(reg1, stk, 4),
 102                ASM_LWZ(reg0, stk, 8),
 103                ASM_LWZ(3, stk, 12),
 104                ASM_ADDI(1, stk, 24),
 105                ASM_LWZ(stk, 1, -4),
 106                ASM_BLR,
 107            };
 108            ulong res;
 109            ulong cr;
 110
 111            if (ret == 0)
 112            {
 113                cr = 0;
 114                cpu_post_exec_22 (code, & cr, & res, test->op1, test->op2);
 115
 116                ret = res == test->res && cr == 0 ? 0 : -1;
 117
 118                if (ret != 0)
 119                {
 120                    post_log ("Error at rlwnm test %d !\n", i);
 121                }
 122            }
 123
 124            if (ret == 0)
 125            {
 126                cpu_post_exec_22 (codecr, & cr, & res, test->op1, test->op2);
 127
 128                ret = res == test->res &&
 129                      (cr & 0xe0000000) == cpu_post_makecr (res) ? 0 : -1;
 130
 131                if (ret != 0)
 132                {
 133                    post_log ("Error at rlwnm test %d !\n", i);
 134                }
 135            }
 136        }
 137    }
 138
 139    if (flag)
 140        enable_interrupts();
 141
 142    return ret;
 143}
 144
 145#endif
 146