+ return ret >> PAGE_SHIFT;
+}
+
+void __init init_mem_mapping(void)
+{
+ probe_page_size_mask();
+
+ /*
+ * Find space for the kernel direct mapping tables.
+ *
+ * Later we should allocate these tables in the local node of the
+ * memory mapped. Unfortunately this is done currently before the
+ * nodes are discovered.
+ */
+#ifdef CONFIG_X86_64
+ find_early_table_space(0, max_pfn<<PAGE_SHIFT);
+#else
+ find_early_table_space(0, max_low_pfn<<PAGE_SHIFT);
+#endif
+ max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT);
+ max_pfn_mapped = max_low_pfn_mapped;
+
+#ifdef CONFIG_X86_64
+ if (max_pfn > max_low_pfn) {
+ max_pfn_mapped = init_memory_mapping(1UL<<32,
+ max_pfn<<PAGE_SHIFT);
+ /* can we preseve max_low_pfn ?*/
+ max_low_pfn = max_pfn;
+ }
+#endif