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Commit 7da657d1 authored by Yinghai Lu's avatar Yinghai Lu Committed by H. Peter Anvin
Browse files

x86: Add find_early_area_size 



Prepare to move bck find_e820_area_size back to e820.c.

Signed-off-by: default avatarYinghai Lu <yinghai@kernel.org>
LKML-Reference: <1265793639-15071-22-git-send-email-yinghai@kernel.org>
Signed-off-by: default avatarH. Peter Anvin <hpa@zytor.com>
parent a678c2be

arch/x86/kernel/early_res.c

+32 −13
Original line number Diff line number Diff line
@@ -476,6 +476,29 @@ u64 __init find_early_area(u64 ei_start, u64 ei_last, u64 start, u64 end, 
	return -1ULL;

}



u64 __init find_early_area_size(u64 ei_start, u64 ei_last, u64 start,

			 u64 *sizep, u64 align)

{

	u64 addr, last;



	addr = round_up(ei_start, align);

	if (addr < start)

		addr = round_up(start, align);

	if (addr >= ei_last)

		goto out;

	*sizep = ei_last - addr;

	while (bad_addr_size(&addr, sizep, align) && addr + *sizep <= ei_last)

		;

	last = addr + *sizep;

	if (last > ei_last)

		goto out;



	return addr;



out:

	return -1ULL;

}



/*

 * Find a free area with specified alignment in a specific range.

 */
@@ -513,24 +536,20 @@ u64 __init find_e820_area_size(u64 start, u64 *sizep, u64 align) 


	for (i = 0; i < e820.nr_map; i++) {

		struct e820entry *ei = &e820.map[i];

		u64 addr, last;

		u64 ei_last;

		u64 addr;

		u64 ei_start, ei_last;



		if (ei->type != E820_RAM)

			continue;

		addr = round_up(ei->addr, align);



		ei_last = ei->addr + ei->size;

		if (addr < start)

			addr = round_up(start, align);

		if (addr >= ei_last)

			continue;

		*sizep = ei_last - addr;

		while (bad_addr_size(&addr, sizep, align) &&

			addr + *sizep <= ei_last)

			;

		last = addr + *sizep;

		if (last > ei_last)

		ei_start = ei->addr;

		addr = find_early_area_size(ei_start, ei_last, start,

					 sizep, align);



		if (addr == -1ULL)

			continue;



		return addr;

	}