libgram/src/memtest.c

   1 #include <gram.h>
   2
   3 static int memtest8(struct gramCtx *ctx, size_t length) {
   4         volatile uint8_t *ram = (volatile uint8_t*)ctx->ddr_base;
   5         size_t i;
   6
   7         for (i = 0; i < length; i++) {
   8                 ram[i] = 0xDE;
   9         }
  10
  11         for (i = 0; i < length; i++) {
  12                 if (ram[i] != 0xDE) {
  13                         return GRAM_ERR_MEMTEST;
  14                 }
  15         }
  16
  17         return GRAM_ERR_NONE;
  18 }
  19
  20 static int memtest32(struct gramCtx *ctx, size_t length) {
  21         volatile uint32_t *ram = (volatile uint32_t*)ctx->ddr_base;
  22         size_t i;
  23
  24         for (i = 0; i < length; i++) {
  25                 ram[i] = 0xFEEDFACE;
  26         }
  27
  28         for (i = 0; i < length; i++) {
  29                 if (ram[i] != 0xFEEDFACE) {
  30                         return GRAM_ERR_MEMTEST;
  31                 }
  32         }
  33
  34         return GRAM_ERR_NONE;
  35 }
  36
  37 int gram_memtest(struct gramCtx *ctx, size_t length, enum GramWidth width) {
  38         if (width == GRAM_8B) {
  39                 return memtest8(ctx, length);
  40         } else if (width == GRAM_32B) {
  41                 return memtest32(ctx, length);
  42         }
  43
  44         return GRAM_ERR_UNDOCUMENTED;
  45 }