#include <linux/efi.h>
#include <linux/pfn.h>
#include <linux/uaccess.h>
+#include <linux/suspend.h>
#include <asm/pgtable.h>
#include <asm/page.h>
subsys_initcall(request_standard_resources);
+#if defined(CONFIG_PM) && defined(CONFIG_SOFTWARE_SUSPEND)
+/**
+ * e820_mark_nosave_regions - Find the ranges of physical addresses that do not
+ * correspond to e820 RAM areas and mark the corresponding pages as nosave for
+ * hibernation.
+ *
+ * This function requires the e820 map to be sorted and without any
+ * overlapping entries and assumes the first e820 area to be RAM.
+ */
+void __init e820_mark_nosave_regions(void)
+{
+ int i;
+ unsigned long pfn;
+
+ pfn = PFN_DOWN(e820.map[0].addr + e820.map[0].size);
+ for (i = 1; i < e820.nr_map; i++) {
+ struct e820entry *ei = &e820.map[i];
+
+ if (pfn < PFN_UP(ei->addr))
+ register_nosave_region(pfn, PFN_UP(ei->addr));
+
+ pfn = PFN_DOWN(ei->addr + ei->size);
+ if (ei->type != E820_RAM)
+ register_nosave_region(PFN_UP(ei->addr), pfn);
+
+ if (pfn >= max_low_pfn)
+ break;
+ }
+}
+#endif
+
void __init add_memory_region(unsigned long long start,
unsigned long long size, int type)
{
extern void limit_regions(unsigned long long size);
extern void print_memory_map(char *who);
+#if defined(CONFIG_PM) && defined(CONFIG_SOFTWARE_SUSPEND)
+extern void e820_mark_nosave_regions(void);
+#else
+static inline void e820_mark_nosave_regions(void)
+{
+}
+#endif
+
#endif/*!__ASSEMBLY__*/
#endif/*__E820_HEADER*/