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| author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
|---|---|---|
| committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
| commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
| tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/arch/x86/kernel/check.c | |
| parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
| download | FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.gz FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.bz2 FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.zip | |
Moved, renamed, and deleted files
The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/arch/x86/kernel/check.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/x86/kernel/check.c | 159 |
1 files changed, 0 insertions, 159 deletions
diff --git a/ANDROID_3.4.5/arch/x86/kernel/check.c b/ANDROID_3.4.5/arch/x86/kernel/check.c deleted file mode 100644 index 5da1269e..00000000 --- a/ANDROID_3.4.5/arch/x86/kernel/check.c +++ /dev/null @@ -1,159 +0,0 @@ -#include <linux/module.h> -#include <linux/sched.h> -#include <linux/kthread.h> -#include <linux/workqueue.h> -#include <linux/memblock.h> - -#include <asm/proto.h> - -/* - * 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. - */ -#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 scan_area { - u64 addr; - u64 size; -} scan_areas[MAX_SCAN_AREAS]; -static int num_scan_areas; - -static __init 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 __init 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 __init 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); - - -void __init setup_bios_corruption_check(void) -{ - phys_addr_t start, end; - u64 i; - - 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); - - for_each_free_mem_range(i, MAX_NUMNODES, &start, &end, NULL) { - start = clamp_t(phys_addr_t, round_up(start, PAGE_SIZE), - PAGE_SIZE, corruption_check_size); - end = clamp_t(phys_addr_t, round_down(end, PAGE_SIZE), - PAGE_SIZE, corruption_check_size); - if (start >= end) - continue; - - memblock_reserve(start, end - start); - scan_areas[num_scan_areas].addr = start; - scan_areas[num_scan_areas].size = end - start; - - /* Assume we've already mapped this early memory */ - memset(__va(start), 0, end - start); - - if (++num_scan_areas >= MAX_SCAN_AREAS) - break; - } - - if (num_scan_areas) - printk(KERN_INFO "Scanning %d areas for low memory corruption\n", num_scan_areas); -} - - -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_ONCE(corruption, KERN_ERR "Memory corruption detected in low memory\n"); -} - -static void check_corruption(struct work_struct *dummy); -static DECLARE_DELAYED_WORK(bios_check_work, check_corruption); - -static void check_corruption(struct work_struct *dummy) -{ - check_for_bios_corruption(); - schedule_delayed_work(&bios_check_work, - round_jiffies_relative(corruption_check_period*HZ)); -} - -static int start_periodic_check_for_corruption(void) -{ - if (!num_scan_areas || !memory_corruption_check || corruption_check_period == 0) - return 0; - - printk(KERN_INFO "Scanning for low memory corruption every %d seconds\n", - corruption_check_period); - - /* First time we run the checks right away */ - schedule_delayed_work(&bios_check_work, 0); - return 0; -} - -module_init(start_periodic_check_for_corruption); - |