void __init early_memtest(unsigned long start, unsigned long end)
{
u64 t_start, t_size;
unsigned pattern;
if (!memtest_pattern)
return;
printk(KERN_INFO "early_memtest: pattern num %d", memtest_pattern);
for (pattern = 0; pattern < memtest_pattern; pattern++) {
t_start = start;
t_size = 0;
while (t_start < end) {
t_start = find_e820_area_size(t_start, &t_size, 1);
/* done ? */
if (t_start >= end)
break;
if (t_start + t_size > end)
t_size = end - t_start;
printk(KERN_CONT "\n %010llx - %010llx pattern %d",
(unsigned long long)t_start,
(unsigned long long)t_start + t_size, pattern);
memtest(t_start, t_size, pattern);
t_start += t_size;
}
}
printk(KERN_CONT "\n");
}
void __init setup_bios_corruption_check(void)
{
u64 addr = PAGE_SIZE; /* assume first page is reserved anyway */
if (memory_corruption_check == -1) {
memory_corruption_check =
#ifdef CONFIG_X86_BOOTPARAM_MEMORY_CORRUPTION_CHECK
1
#else
0
#endif
;
}
if (corruption_check_size == 0)
memory_corruption_check = 0;
if (!memory_corruption_check)
return;
corruption_check_size = round_up(corruption_check_size, PAGE_SIZE);
while (addr < corruption_check_size && num_scan_areas < MAX_SCAN_AREAS) {
u64 size;
addr = find_e820_area_size(addr, &size, PAGE_SIZE);
if (addr == 0)
break;
if ((addr + size) > corruption_check_size)
size = corruption_check_size - addr;
if (size == 0)
break;
e820_update_range(addr, size, E820_RAM, E820_RESERVED);
scan_areas[num_scan_areas].addr = addr;
scan_areas[num_scan_areas].size = size;
num_scan_areas++;
/* Assume we've already mapped this early memory */
memset(__va(addr), 0, size);
addr += size;
}
printk(KERN_INFO "Scanning %d areas for low memory corruption\n",
num_scan_areas);
update_e820();
}
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;
}
}
