diag/diag_memory.c

   1
   2 #include <common.h>
   3
   4 #include "diag.h"
   5
   6 /*******************************************************************************
   7 *
   8 * Name        : mem_data_bus_test
   9 * Description : The function tests data bus of the DRAM. It writes walking one
  10 *               pattern to a fixed memory location.
  11 * Input arg   : None
  12 * Output arg  : None
  13 * Return      : Returns 1 on failure, else 0
  14 *******************************************************************************/
  15
  16 int mem_data_bus_test(void)
  17 {
  18         unsigned int pattern  = 1;
  19         unsigned int *address = mem_test_start_offset;
  20
  21         printf("\tDDR2 data bus test                               ");
  22
  23         for(; pattern != 0; pattern <<= 1)
  24         {
  25                 *address = pattern;
  26
  27                 if(pattern != *address)
  28                 {
  29                         printf("FAILED\n");
  30                         printf("\t\tTest failed at offset = 0x%X\n"
  31                                "\t\tData written          = 0x%X\n"
  32                                "\t\tData read             = 0x%X\n", address,
  33                                pattern, *address);
  34                         return 1;
  35                 }
  36         }
  37         printf("PASSED\n");
  38         return 0;
  39 }
  40
  41 /*******************************************************************************
  42 *
  43 * Name        : mem_address_bus_test
  44 * Description : The function tests address bus of the DRAM. It writes walking
  45 *               one pattern while changes the addresses in the same way. i.e.
  46 *               write 1 to offset 1, 8 to offset 8, etc. Verify the data after
  47 *               writting to the buffer with length MEM_ADD_TEST_SIZE.
  48 * Input arg   : None
  49 * Output arg  : None
  50 * Return      : Returns 1 on failure, else 0
  51 *******************************************************************************/
  52
  53 int mem_address_bus_test(void)
  54 {
  55         unsigned int offset = 1, size;
  56         unsigned int *base_address = mem_test_start_offset;
  57
  58         size = mem_test_end_offset - mem_test_start_offset;
  59
  60         printf("\tDDR2 address bus test                            ");
  61
  62         /* We should start with pattern = 1. As we want to use offset and
  63          * pattern the same variable, we will decrement base address by 1.
  64          * So, even if we start with offset = pattern = 1, we have actually
  65          * started from the given base address. */
  66         base_address--;
  67
  68         for(; offset < size; offset <<= 1)
  69         {
  70                 base_address[offset] = offset;
  71         }
  72
  73         for(offset = 1; offset < size; offset <<= 1)
  74         {
  75                 if(base_address[offset] != offset)
  76                 {
  77                         printf("FAILED\n");
  78                         printf("\t\tTest failed at offset = 0x%X\n"
  79                                "\t\tData written          = 0x%X\n"
  80                                "\t\tData read             = 0x%X\n", base_address
  81                                + offset, offset, base_address[offset]);
  82                         return 1;
  83                 }
  84         }
  85         printf("PASSED\n");
  86         return 0;
  87 }
  88
  89 /*******************************************************************************
  90 *
  91 * Name        : mem_device_test
  92 * Description : The function tests address bus of the DRAM. It writes walking
  93 *               one pattern while changes the addresses in the same way. i.e.
  94 *               write 1 to offset 1, 8 to offset 8, etc. Verify the data after
  95 *               writting to the buffer with length MEM_ADD_TEST_SIZE.
  96 * Input arg   : None
  97 * Output arg  : None
  98 * Return      : Returns 1 on failure, else 0
  99 *******************************************************************************/
 100
 101 int mem_device_test(void)
 102 {
 103         unsigned int offset = 1, size;
 104         unsigned int *base_address = mem_test_start_offset;
 105
 106         size = mem_test_end_offset - mem_test_start_offset;
 107
 108         printf("\tDDR2 device test                                 ");
 109
 110         /* Debug print */
 111 #ifdef DEBUG
 112         printf("Start address = %#X\n", base_address);
 113         printf("size = %#X\n", size);
 114 #endif
 115
 116         /* We should start with pattern = 1. As we want to use offset and
 117          * pattern the same variable, we will decrement base address by 1.
 118          * So, even if we start with offset = pattern = 1, we have actually
 119          * started from the given base address. */
 120         base_address--;
 121
 122         for(; offset < size; offset++)
 123         {
 124                 base_address[offset] = offset;
 125         }
 126
 127         /* Check previously written pattern and write anti-pattern */
 128         for(offset = 1; offset < size; offset++)
 129         {
 130                 if(base_address[offset] != offset)
 131                 {
 132                         printf("FAILED\n");
 133                         printf("\t\tTest failed at offset = 0x%X\n"
 134                                "\t\tData written          = 0x%X\n"
 135                                "\t\tData read             = 0x%X\n", base_address
 136                                + offset, offset, base_address[offset]);
 137                         return 1;
 138                 }
 139
 140                 /* Write anti-pattern */
 141                 base_address[offset] = ~offset;
 142         }
 143
 144         /* Debug print */
 145 #ifdef DEBUG
 146         printf("Checking anti-pattern\n");
 147 #endif
 148
 149         /* Check anti-pattern */
 150         for(offset = 1; offset < size; offset++)
 151         {
 152                 if(base_address[offset] != ~offset)
 153                 {
 154                         printf("FAILED\n");
 155                         printf("\t\tTest failed at offset = 0x%X\n"
 156                                "\t\tData written          = 0x%X\n"
 157                                "\t\tData read             = 0x%X\n", base_address
 158                                + offset, ~offset, base_address[offset]);
 159                         return 1;
 160                 }
 161         }
 162
 163         printf("PASSED\n");
 164         return 0;
 165 }
 166