[linux-2.6-block.git] / arch / tile / include / asm / hugetlb.h

/*
 * Copyright 2010 Tilera Corporation. All Rights Reserved.
 *
 *   This program is free software; you can redistribute it and/or
 *   modify it under the terms of the GNU General Public License
 *   as published by the Free Software Foundation, version 2.
 *
 *   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, GOOD TITLE or
 *   NON INFRINGEMENT.  See the GNU General Public License for
 *   more details.
 */

#ifndef _ASM_TILE_HUGETLB_H
#define _ASM_TILE_HUGETLB_H

#include <asm/page.h>
#include <asm-generic/hugetlb.h>


static inline int is_hugepage_only_range(struct mm_struct *mm,
					 unsigned long addr,
					 unsigned long len) {
	return 0;
}

/*
 * If the arch doesn't supply something else, assume that hugepage
 * size aligned regions are ok without further preparation.
 */
static inline int prepare_hugepage_range(struct file *file,
					 unsigned long addr, unsigned long len)
{
	struct hstate *h = hstate_file(file);
	if (len & ~huge_page_mask(h))
		return -EINVAL;
	if (addr & ~huge_page_mask(h))
		return -EINVAL;
	return 0;
}

static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm)
{
}

static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
					  unsigned long addr, unsigned long end,
					  unsigned long floor,
					  unsigned long ceiling)
{
	free_pgd_range(tlb, addr, end, floor, ceiling);
}

static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
				   pte_t *ptep, pte_t pte)
{
	set_pte(ptep, pte);
}

static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
					    unsigned long addr, pte_t *ptep)
{
	return ptep_get_and_clear(mm, addr, ptep);
}

static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
					 unsigned long addr, pte_t *ptep)
{
	ptep_clear_flush(vma, addr, ptep);
}

static inline int huge_pte_none(pte_t pte)
{
	return pte_none(pte);
}

static inline pte_t huge_pte_wrprotect(pte_t pte)
{
	return pte_wrprotect(pte);
}

static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
					   unsigned long addr, pte_t *ptep)
{
	ptep_set_wrprotect(mm, addr, ptep);
}

static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
					     unsigned long addr, pte_t *ptep,
					     pte_t pte, int dirty)
{
	return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
}

static inline pte_t huge_ptep_get(pte_t *ptep)
{
	return *ptep;
}

static inline int arch_prepare_hugepage(struct page *page)
{
	return 0;
}

static inline void arch_release_hugepage(struct page *page)
{
}

static inline void arch_clear_hugepage_flags(struct page *page)
{
}

#ifdef CONFIG_HUGETLB_SUPER_PAGES
static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
				       struct page *page, int writable)
{
	size_t pagesize = huge_page_size(hstate_vma(vma));
	if (pagesize != PUD_SIZE && pagesize != PMD_SIZE)
		entry = pte_mksuper(entry);
	return entry;
}
#define arch_make_huge_pte arch_make_huge_pte

/* Sizes to scale up page size for PTEs with HV_PTE_SUPER bit. */
enum {
	HUGE_SHIFT_PGDIR = 0,
	HUGE_SHIFT_PMD = 1,
	HUGE_SHIFT_PAGE = 2,
	HUGE_SHIFT_ENTRIES
};
extern int huge_shift[HUGE_SHIFT_ENTRIES];
#endif

#endif /* _ASM_TILE_HUGETLB_H */
Commit	Line	Data
867e359b CM	1	/*
	2	* Copyright 2010 Tilera Corporation. All Rights Reserved.
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License
	6	* as published by the Free Software Foundation, version 2.
	7	*
	8	* This program is distributed in the hope that it will be useful, but
	9	* WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
	11	* NON INFRINGEMENT. See the GNU General Public License for
	12	* more details.
	13	*/
	14
	15	#ifndef _ASM_TILE_HUGETLB_H
	16	#define _ASM_TILE_HUGETLB_H
	17
	18	#include <asm/page.h>
106c992a	19	#include <asm-generic/hugetlb.h>
867e359b CM	20
	21
	22	static inline int is_hugepage_only_range(struct mm_struct *mm,
	23	unsigned long addr,
	24	unsigned long len) {
	25	return 0;
	26	}
	27
	28	/*
	29	* If the arch doesn't supply something else, assume that hugepage
	30	* size aligned regions are ok without further preparation.
	31	*/
	32	static inline int prepare_hugepage_range(struct file *file,
	33	unsigned long addr, unsigned long len)
	34	{
	35	struct hstate *h = hstate_file(file);
	36	if (len & ~huge_page_mask(h))
	37	return -EINVAL;
	38	if (addr & ~huge_page_mask(h))
	39	return -EINVAL;
	40	return 0;
	41	}
	42
	43	static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm)
	44	{
	45	}
	46
	47	static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
	48	unsigned long addr, unsigned long end,
	49	unsigned long floor,
	50	unsigned long ceiling)
	51	{
	52	free_pgd_range(tlb, addr, end, floor, ceiling);
	53	}
	54
	55	static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
	56	pte_t *ptep, pte_t pte)
	57	{
76c567fb	58	set_pte(ptep, pte);
867e359b CM	59	}
	60
	61	static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
	62	unsigned long addr, pte_t *ptep)
	63	{
	64	return ptep_get_and_clear(mm, addr, ptep);
	65	}
	66
	67	static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
	68	unsigned long addr, pte_t *ptep)
	69	{
	70	ptep_clear_flush(vma, addr, ptep);
	71	}
	72
	73	static inline int huge_pte_none(pte_t pte)
	74	{
	75	return pte_none(pte);
	76	}
	77
	78	static inline pte_t huge_pte_wrprotect(pte_t pte)
	79	{
	80	return pte_wrprotect(pte);
	81	}
	82
	83	static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
	84	unsigned long addr, pte_t *ptep)
	85	{
	86	ptep_set_wrprotect(mm, addr, ptep);
	87	}
	88
	89	static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
	90	unsigned long addr, pte_t *ptep,
	91	pte_t pte, int dirty)
	92	{
	93	return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
	94	}
	95
	96	static inline pte_t huge_ptep_get(pte_t *ptep)
	97	{
	98	return *ptep;
	99	}
	100
	101	static inline int arch_prepare_hugepage(struct page *page)
	102	{
	103	return 0;
	104	}
	105
	106	static inline void arch_release_hugepage(struct page *page)
	107	{
	108	}
	109
5d3a551c WD	110	static inline void arch_clear_hugepage_flags(struct page *page)
	111	{
	112	}
	113
621b1955 CM	114	#ifdef CONFIG_HUGETLB_SUPER_PAGES
	115	static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
	116	struct page *page, int writable)
	117	{
	118	size_t pagesize = huge_page_size(hstate_vma(vma));
	119	if (pagesize != PUD_SIZE && pagesize != PMD_SIZE)
	120	entry = pte_mksuper(entry);
	121	return entry;
	122	}
	123	#define arch_make_huge_pte arch_make_huge_pte
	124
	125	/* Sizes to scale up page size for PTEs with HV_PTE_SUPER bit. */
	126	enum {
	127	HUGE_SHIFT_PGDIR = 0,
	128	HUGE_SHIFT_PMD = 1,
	129	HUGE_SHIFT_PAGE = 2,
	130	HUGE_SHIFT_ENTRIES
	131	};
	132	extern int huge_shift[HUGE_SHIFT_ENTRIES];
	133	#endif
	134
867e359b	135	#endif /* _ASM_TILE_HUGETLB_H */