x86: introduce initmem_init for 64 bit
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 97c2bc7..99a091e 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -611,6 +611,22 @@
}
#ifndef CONFIG_NUMA
+void __init initmem_init(unsigned long start_pfn, unsigned long end_pfn)
+{
+ unsigned long bootmap_size, bootmap;
+
+ bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT;
+ bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, bootmap_size,
+ PAGE_SIZE);
+ if (bootmap == -1L)
+ panic("Cannot find bootmem map of size %ld\n", bootmap_size);
+ bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, end_pfn);
+ e820_register_active_regions(0, start_pfn, end_pfn);
+ free_bootmem_with_active_regions(0, end_pfn);
+ early_res_to_bootmem(0, end_pfn<<PAGE_SHIFT);
+ reserve_bootmem(bootmap, bootmap_size, BOOTMEM_DEFAULT);
+}
+
void __init paging_init(void)
{
unsigned long max_zone_pfns[MAX_NR_ZONES];