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x86: memtest: wipe out test pattern from memory

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Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Andreas Herrmann 2009-02-25 11:30:04 +01:00 committed by Ingo Molnar
parent 570c9e69aa
commit bfb4dc0da4
1 changed files with 32 additions and 22 deletions
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54
arch/x86/mm/memtest.c
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@ -57,6 +57,29 @@ static void __init memtest(u64 pattern, u64 start_phys, u64 size)
reserve_bad_mem(pattern, start_bad, last_bad + incr); reserve_bad_mem(pattern, start_bad, last_bad + incr);
} }
static void __init do_one_pass(u64 pattern, u64 start, u64 end)
{
u64 size = 0;
while (start < end) {
start = find_e820_area_size(start, &size, 1);
/* done ? */
if (start >= end)
break;
if (start + size > end)
size = end - start;
printk(KERN_INFO " %010llx - %010llx pattern %016llx\n",
(unsigned long long) start,
(unsigned long long) start + size,
(unsigned long long) cpu_to_be64(pattern));
memtest(pattern, start, size);
start += size;
}
}
/* default is disabled */ /* default is disabled */
static int memtest_pattern __initdata; static int memtest_pattern __initdata;
@ -71,35 +94,22 @@ early_param("memtest", parse_memtest);
void __init early_memtest(unsigned long start, unsigned long end) void __init early_memtest(unsigned long start, unsigned long end)
{ {
u64 t_start, t_size;
unsigned int i; unsigned int i;
u64 pattern; unsigned int idx = 0;
if (!memtest_pattern) if (!memtest_pattern)
return; return;
printk(KERN_INFO "early_memtest: # of tests: %d\n", memtest_pattern); printk(KERN_INFO "early_memtest: # of tests: %d\n", memtest_pattern);
for (i = 0; i < memtest_pattern; i++) { for (i = 0; i < memtest_pattern; i++) {
unsigned int idx = i % ARRAY_SIZE(patterns); idx = i % ARRAY_SIZE(patterns);
pattern = patterns[idx]; do_one_pass(patterns[idx], start, end);
t_start = start; }
t_size = 0;
while (t_start < end) {
t_start = find_e820_area_size(t_start, &t_size, 1);
/* done ? */ if (idx > 0) {
if (t_start >= end) printk(KERN_INFO "early_memtest: wipe out "
break; "test pattern from memory\n");
if (t_start + t_size > end) /* additional test with pattern 0 will do this */
t_size = end - t_start; do_one_pass(0, start, end);
printk(KERN_INFO " %010llx - %010llx pattern %016llx\n",
(unsigned long long) t_start,
(unsigned long long) t_start + t_size,
(unsigned long long) cpu_to_be64(pattern));
memtest(pattern, t_start, t_size);
t_start += t_size;
}
} }
} }