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Commit 1b8c78be authored by Yinghai Lu's avatar Yinghai Lu Committed by H. Peter Anvin
Browse files

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: default avatarYinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1359058816-7615-15-git-send-email-yinghai@kernel.org


Reviewed-by: default avatarPekka Enberg <penberg@kernel.org>
Signed-off-by: default avatarH. Peter Anvin <hpa@linux.intel.com>
parent 10054230

arch/x86/kernel/head32.c

+0 −11
Original line number Diff line number Diff line
@@ -36,17 +36,6 @@ void __init i386_start_kernel(void) 
	memblock_reserve(__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 */

	switch (boot_params.hdr.hardware_subarch) {

	case X86_SUBARCH_MRST:

arch/x86/kernel/head64.c

+0 −11
Original line number Diff line number Diff line
@@ -178,17 +178,6 @@ void __init x86_64_start_reservations(char *real_mode_data) 
	memblock_reserve(__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();



	/*

arch/x86/kernel/setup.c

+18 −4
Original line number Diff line number Diff line
@@ -360,6 +360,19 @@ static u64 __init get_mem_size(unsigned long limit_pfn) 


	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 @@ static void __init reserve_initrd(void) 
	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 @@ static void __init reserve_initrd(void) 
	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 @@ early_param("reservelow", parse_reservelow); 


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();