x86: corruption check: move the corruption checks into their own file

[linux-2.6-omap-h63xx.git] / arch / x86 / kernel / setup.c

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 4f38e0305b075e4020ef6fbd688feac0036956fb..af690aa593a937aa8af95f2f402d36657dc915e8 100644 (file)
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -587,158 +587,6 @@ static struct x86_quirks default_x86_quirks __initdata;
 
 struct x86_quirks *x86_quirks __initdata = &default_x86_quirks;
 
-/*
- * Some BIOSes seem to corrupt the low 64k of memory during events
- * like suspend/resume and unplugging an HDMI cable.  Reserve all
- * remaining free memory in that area and fill it with a distinct
- * pattern.
- */
-#ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
-#define MAX_SCAN_AREAS 8
-
-static int __read_mostly memory_corruption_check = -1;
-
-static unsigned __read_mostly corruption_check_size = 64*1024;
-static unsigned __read_mostly corruption_check_period = 60; /* seconds */
-
-static struct e820entry scan_areas[MAX_SCAN_AREAS];
-static int num_scan_areas;
-
-
-static int set_corruption_check(char *arg)
-{
-       char *end;
-
-       memory_corruption_check = simple_strtol(arg, &end, 10);
-
-       return (*end == 0) ? 0 : -EINVAL;
-}
-early_param("memory_corruption_check", set_corruption_check);
-
-static int set_corruption_check_period(char *arg)
-{
-       char *end;
-
-       corruption_check_period = simple_strtoul(arg, &end, 10);
-
-       return (*end == 0) ? 0 : -EINVAL;
-}
-early_param("memory_corruption_check_period", set_corruption_check_period);
-
-static int set_corruption_check_size(char *arg)
-{
-       char *end;
-       unsigned size;
-
-       size = memparse(arg, &end);
-
-       if (*end == '\0')
-               corruption_check_size = size;
-
-       return (size == corruption_check_size) ? 0 : -EINVAL;
-}
-early_param("memory_corruption_check_size", set_corruption_check_size);
-
-
-static 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 struct timer_list periodic_check_timer;
-
-void check_for_bios_corruption(void)
-{
-       int i;
-       int corruption = 0;
-
-       if (!memory_corruption_check)
-               return;
-
-       for (i = 0; i < num_scan_areas; i++) {
-               unsigned long *addr = __va(scan_areas[i].addr);
-               unsigned long size = scan_areas[i].size;
-
-               for (; size; addr++, size -= sizeof(unsigned long)) {
-                       if (!*addr)
-                               continue;
-                       printk(KERN_ERR "Corrupted low memory at %p (%lx phys) = %08lx\n",
-                              addr, __pa(addr), *addr);
-                       corruption = 1;
-                       *addr = 0;
-               }
-       }
-
-       WARN(corruption, KERN_ERR "Memory corruption detected in low memory\n");
-}
-
-static void periodic_check_for_corruption(unsigned long data)
-{
-       check_for_bios_corruption();
-       mod_timer(&periodic_check_timer,
-               round_jiffies(jiffies + corruption_check_period*HZ));
-}
-
-void start_periodic_check_for_corruption(void)
-{
-       if (!memory_corruption_check || corruption_check_period == 0)
-               return;
-
-       printk(KERN_INFO "Scanning for low memory corruption every %d seconds\n",
-              corruption_check_period);
-
-       init_timer(&periodic_check_timer);
-       periodic_check_timer.function = &periodic_check_for_corruption;
-       periodic_check_for_corruption(0);
-}
-#endif
-
 static int __init dmi_low_memory_corruption(const struct dmi_system_id *d)
 {
        printk(KERN_NOTICE