diff options
Diffstat (limited to 'common')
| -rw-r--r-- | common/memtest.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/common/memtest.c b/common/memtest.c index 3b0bcb7dc9..9eda78895d 100644 --- a/common/memtest.c +++ b/common/memtest.c @@ -170,6 +170,15 @@ int mem_test(resource_size_t _start, for (offset = 1; offset <= num_words; offset <<= 1) start[offset] = pattern; + /* + * Now write anti-pattern at offset 0. If during the previous + * step one of the address lines got stuck high this + * operation would result in a memory cell at power-of-two + * offset being set to anti-pattern which hopefully would be + * detected byt the loop that follows. + */ + start[0] = anti_pattern; + printf("Check for address bits stuck high.\n"); /* @@ -187,6 +196,11 @@ int mem_test(resource_size_t _start, } } + /* + Restore original value + */ + start[0] = pattern; + printf("Check for address bits stuck " "low or shorted.\n"); @@ -196,7 +210,8 @@ int mem_test(resource_size_t _start, for (offset2 = 1; offset2 <= num_words; offset2 <<= 1) { start[offset2] = anti_pattern; - for (offset = 1; offset <= num_words; offset <<= 1) { + for (offset = 0; offset <= num_words; + offset = (offset) ? offset << 1 : 1) { temp = start[offset]; if ((temp != pattern) && |