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x86: Merge early_reserve_initrd for 32bit and 64bit

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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>
This commit is contained in:
Yinghai Lu 2013-01-24 12:19:55 -08:00 committed by H. Peter Anvin
parent 100542306f
commit 1b8c78be01
3 changed files with 18 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
arch/x86/kernel/head32.c
View File

@ -36,17 +36,6 @@ void __init i386_start_kernel(void)
memblock_reserve(__pa_symbol(&_text), memblock_reserve(__pa_symbol(&_text),
__pa_symbol(&__bss_stop) - __pa_symbol(&_text)); __pa_symbol(&__bss_stop) - __pa_symbol(&_text));
#ifdef CONFIG_BLK_DEV_INITRD
/* Reserve INITRD */
if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) {
/* 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);
memblock_reserve(ramdisk_image, ramdisk_end - ramdisk_image);
}
#endif
/* Call the subarch specific early setup function */ /* Call the subarch specific early setup function */
switch (boot_params.hdr.hardware_subarch) { switch (boot_params.hdr.hardware_subarch) {
case X86_SUBARCH_MRST: case X86_SUBARCH_MRST:

11
arch/x86/kernel/head64.c
View File

@ -178,17 +178,6 @@ void __init x86_64_start_reservations(char *real_mode_data)
memblock_reserve(__pa_symbol(&_text), memblock_reserve(__pa_symbol(&_text),
__pa_symbol(&__bss_stop) - __pa_symbol(&_text)); __pa_symbol(&__bss_stop) - __pa_symbol(&_text));
#ifdef CONFIG_BLK_DEV_INITRD
/* Reserve INITRD */
if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) {
/* Assume only end is not page aligned */
unsigned long ramdisk_image = boot_params.hdr.ramdisk_image;
unsigned long ramdisk_size = boot_params.hdr.ramdisk_size;
unsigned long ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size);
memblock_reserve(ramdisk_image, ramdisk_end - ramdisk_image);
}
#endif
reserve_ebda_region(); reserve_ebda_region();
/* /*

22
arch/x86/kernel/setup.c
View File

@ -360,6 +360,19 @@ static u64 __init get_mem_size(unsigned long limit_pfn)
return mapped_pages << PAGE_SHIFT; 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) static void __init reserve_initrd(void)
{ {
/* Assume only end is not page aligned */ /* Assume only end is not page aligned */
@ -386,10 +399,6 @@ static void __init reserve_initrd(void)
if (pfn_range_is_mapped(PFN_DOWN(ramdisk_image), if (pfn_range_is_mapped(PFN_DOWN(ramdisk_image),
PFN_DOWN(ramdisk_end))) { PFN_DOWN(ramdisk_end))) {
/* All are mapped, easy case */ /* 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_start = ramdisk_image + PAGE_OFFSET;
initrd_end = initrd_start + ramdisk_size; initrd_end = initrd_start + ramdisk_size;
return; return;
@ -400,6 +409,9 @@ static void __init reserve_initrd(void)
memblock_free(ramdisk_image, ramdisk_end - ramdisk_image); memblock_free(ramdisk_image, ramdisk_end - ramdisk_image);
} }
#else #else
static void __init early_reserve_initrd(void)
{
}
static void __init reserve_initrd(void) static void __init reserve_initrd(void)
{ {
} }
@ -760,6 +772,8 @@ early_param("reservelow", parse_reservelow);
void __init setup_arch(char **cmdline_p) void __init setup_arch(char **cmdline_p)
{ {
early_reserve_initrd();
#ifdef CONFIG_X86_32 #ifdef CONFIG_X86_32
memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
visws_early_detect(); visws_early_detect();