src/ram/ramtest.c

   1 static void write_phys(unsigned long addr, unsigned long value)
   2 {
   3         unsigned long *ptr;
   4         ptr = (void *)addr;
   5         *ptr = value;
   6 }
   7
   8 static unsigned long read_phys(unsigned long addr)
   9 {
  10         unsigned long *ptr;
  11         ptr = (void *)addr;
  12         return *ptr;
  13 }
  14
  15 void ram_fill(unsigned long start, unsigned long stop)
  16 {
  17         unsigned long addr;
  18         /*
  19          * Fill.
  20          */
  21         print_debug("DRAM fill: ");
  22         print_debug_hex32(start);
  23         print_debug("-");
  24         print_debug_hex32(stop);
  25         print_debug("\r\n");
  26         for(addr = start; addr < stop ; addr += 4) {
  27                 /* Display address being filled */
  28                 if ((addr & 0xffff) == 0) {
  29                         print_debug_hex32(addr);
  30                         print_debug("\r");
  31                 }
  32                 write_phys(addr, addr);
  33         };
  34         /* Display final address */
  35         print_debug_hex32(addr);
  36         print_debug("\r\nDRAM filled\r\n");
  37 }
  38
  39 void ram_verify(unsigned long start, unsigned long stop)
  40 {
  41         unsigned long addr;
  42         /*
  43          * Verify.
  44          */
  45         print_debug("DRAM verify: ");
  46         print_debug_hex32(start);
  47         print_debug_char('-');
  48         print_debug_hex32(stop);
  49         print_debug("\r\n");
  50         for(addr = start; addr < stop ; addr += 4) {
  51                 unsigned long value;
  52                 /* Display address being tested */
  53                 if ((addr & 0xffff) == 0) {
  54                         print_debug_hex32(addr);
  55                         print_debug("\r");
  56                 }
  57                 value = read_phys(addr);
  58                 if (value != addr) {
  59                         /* Display address with error */
  60                         print_err_hex32(addr);
  61                         print_err_char(':');
  62                         print_err_hex32(value);
  63                         print_err("\r\n");
  64                 }
  65         }
  66         /* Display final address */
  67         print_debug_hex32(addr);
  68         print_debug("\r\nDRAM verified\r\n");
  69 }
  70
  71
  72 void ramcheck(unsigned long start, unsigned long stop)
  73 {
  74         int result;
  75         /*
  76          * This is much more of a "Is my DRAM properly configured?"
  77          * test than a "Is my DRAM faulty?" test.  Not all bits
  78          * are tested.   -Tyson
  79          */
  80         print_debug("Testing DRAM : ");
  81         print_debug_hex32(start);
  82         print_debug("-");
  83         print_debug_hex32(stop);
  84         print_debug("\r\n");
  85         ram_fill(start, stop);
  86         ram_verify(start, stop);
  87         print_debug("Done.\n");
  88 }
  89