x86: Merge early_reserve_initrd for 32bit and 64bit
They are the same, could move them out from head32/64.c to setup.c.
We are using memblock, and it could handle overlapping properly, so
we don't need to reserve some at first to hold the location, and just
need to make sure we reserve them before we are using memblock to find
free mem to use.
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1359058816-7615-15-git-send-email-yinghai@kernel.org
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index d58083a..8e35692 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -360,6 +360,19 @@
return mapped_pages << PAGE_SHIFT;
}
+static void __init early_reserve_initrd(void)
+{
+ /* Assume only end is not page aligned */
+ u64 ramdisk_image = boot_params.hdr.ramdisk_image;
+ u64 ramdisk_size = boot_params.hdr.ramdisk_size;
+ u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size);
+
+ if (!boot_params.hdr.type_of_loader ||
+ !ramdisk_image || !ramdisk_size)
+ return; /* No initrd provided by bootloader */
+
+ memblock_reserve(ramdisk_image, ramdisk_end - ramdisk_image);
+}
static void __init reserve_initrd(void)
{
/* Assume only end is not page aligned */
@@ -386,10 +399,6 @@
if (pfn_range_is_mapped(PFN_DOWN(ramdisk_image),
PFN_DOWN(ramdisk_end))) {
/* All are mapped, easy case */
- /*
- * don't need to reserve again, already reserved early
- * in i386_start_kernel
- */
initrd_start = ramdisk_image + PAGE_OFFSET;
initrd_end = initrd_start + ramdisk_size;
return;
@@ -400,6 +409,9 @@
memblock_free(ramdisk_image, ramdisk_end - ramdisk_image);
}
#else
+static void __init early_reserve_initrd(void)
+{
+}
static void __init reserve_initrd(void)
{
}
@@ -760,6 +772,8 @@
void __init setup_arch(char **cmdline_p)
{
+ early_reserve_initrd();
+
#ifdef CONFIG_X86_32
memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
visws_early_detect();