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-rw-r--r--board/RRvision/RRvision.c19
1 files changed, 16 insertions, 3 deletions
diff --git a/board/RRvision/RRvision.c b/board/RRvision/RRvision.c
index d6f5c2a..8ed561d 100644
--- a/board/RRvision/RRvision.c
+++ b/board/RRvision/RRvision.c
@@ -230,8 +230,8 @@ static long int dram_size (long int mamr_value, long int *base,
volatile immap_t *immap = (immap_t *) CFG_IMMR;
volatile memctl8xx_t *memctl = &immap->im_memctl;
volatile long int *addr;
- ulong cnt, val;
- ulong save[32]; /* to make test non-destructive */
+ ulong cnt, val, size;
+ ulong save[32]; /* to make test non-destructive */
unsigned char i = 0;
memctl->memc_mamr = mamr_value;
@@ -250,7 +250,13 @@ static long int dram_size (long int mamr_value, long int *base,
/* check at base address */
if ((val = *addr) != 0) {
+ /* Restore the original data before leaving the function.
+ */
*addr = save[i];
+ for (cnt = 1; cnt <= maxsize / sizeof(long); cnt <<= 1) {
+ addr = (volatile ulong *) base + cnt;
+ *addr = save[--i];
+ }
return (0);
}
@@ -261,7 +267,14 @@ static long int dram_size (long int mamr_value, long int *base,
*addr = save[--i];
if (val != (~cnt)) {
- return (cnt * sizeof (long));
+ size = cnt * sizeof (long);
+ /* Restore the original data before returning
+ */
+ for (cnt <<= 1; cnt <= maxsize / sizeof (long); cnt <<= 1) {
+ addr = (volatile ulong *) base + cnt;
+ *addr = save[--i];
+ }
+ return (size);
}
}
return (maxsize);