[linux-2.6-block.git] / arch / arm / mm / hugetlbpage.c

/*
 * arch/arm/mm/hugetlbpage.c
 *
 * Copyright (C) 2012 ARM Ltd.
 *
 * Based on arch/x86/include/asm/hugetlb.h and Bill Carson's patches
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#include <linux/init.h>
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/hugetlb.h>
#include <linux/pagemap.h>
#include <linux/err.h>
#include <linux/sysctl.h>
#include <asm/mman.h>
#include <asm/tlb.h>
#include <asm/tlbflush.h>
#include <asm/pgalloc.h>

/*
 * On ARM, huge pages are backed by pmd's rather than pte's, so we do a lot
 * of type casting from pmd_t * to pte_t *.
 */

int pud_huge(pud_t pud)
{
	return 0;
}

int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep)
{
	return 0;
}

int pmd_huge(pmd_t pmd)
{
	return pmd_val(pmd) && !(pmd_val(pmd) & PMD_TABLE_BIT);
}
Commit	Line	Data
1355e2a6 CM	1	/*
	2	* arch/arm/mm/hugetlbpage.c
	3	*
	4	* Copyright (C) 2012 ARM Ltd.
	5	*
	6	* Based on arch/x86/include/asm/hugetlb.h and Bill Carson's patches
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	20	*/
	21
	22	#include <linux/init.h>
	23	#include <linux/fs.h>
	24	#include <linux/mm.h>
	25	#include <linux/hugetlb.h>
	26	#include <linux/pagemap.h>
	27	#include <linux/err.h>
	28	#include <linux/sysctl.h>
	29	#include <asm/mman.h>
	30	#include <asm/tlb.h>
	31	#include <asm/tlbflush.h>
	32	#include <asm/pgalloc.h>
	33
	34	/*
	35	* On ARM, huge pages are backed by pmd's rather than pte's, so we do a lot
	36	* of type casting from pmd_t * to pte_t *.
	37	*/
	38
1355e2a6 CM	39	int pud_huge(pud_t pud)
	40	{
	41	return 0;
	42	}
	43
	44	int huge_pmd_unshare(struct mm_struct mm, unsigned long addr, pte_t *ptep)
	45	{
	46	return 0;
	47	}
	48
1355e2a6 CM	49	int pmd_huge(pmd_t pmd)
	50	{
	51	return pmd_val(pmd) && !(pmd_val(pmd) & PMD_TABLE_BIT);
	52	}