[linux-2.6-block.git] / arch / arm64 / include / asm / pgtable.h

/*
 * Copyright (C) 2012 ARM Ltd.
 *
 * 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, see <http://www.gnu.org/licenses/>.
 */
#ifndef __ASM_PGTABLE_H
#define __ASM_PGTABLE_H

#include <asm/proc-fns.h>

#include <asm/memory.h>
#include <asm/pgtable-hwdef.h>

/*
 * Software defined PTE bits definition.
 */
#define PTE_VALID		(_AT(pteval_t, 1) << 0)
#define PTE_FILE		(_AT(pteval_t, 1) << 2)	/* only when !pte_present() */
#define PTE_DIRTY		(_AT(pteval_t, 1) << 55)
#define PTE_SPECIAL		(_AT(pteval_t, 1) << 56)
#define PTE_WRITE		(_AT(pteval_t, 1) << 57)
#define PTE_PROT_NONE		(_AT(pteval_t, 1) << 58) /* only when !PTE_VALID */

/*
 * VMALLOC and SPARSEMEM_VMEMMAP ranges.
 */
#define VMALLOC_START		(UL(0xffffffffffffffff) << VA_BITS)
#define VMALLOC_END		(PAGE_OFFSET - UL(0x400000000) - SZ_64K)

#define vmemmap			((struct page *)(VMALLOC_END + SZ_64K))

#define FIRST_USER_ADDRESS	0

#ifndef __ASSEMBLY__
extern void __pte_error(const char *file, int line, unsigned long val);
extern void __pmd_error(const char *file, int line, unsigned long val);
extern void __pgd_error(const char *file, int line, unsigned long val);

#define pte_ERROR(pte)		__pte_error(__FILE__, __LINE__, pte_val(pte))
#ifndef CONFIG_ARM64_2_LEVELS
#define pmd_ERROR(pmd)		__pmd_error(__FILE__, __LINE__, pmd_val(pmd))
#endif
#define pgd_ERROR(pgd)		__pgd_error(__FILE__, __LINE__, pgd_val(pgd))

#ifdef CONFIG_SMP
#define PROT_DEFAULT		(PTE_TYPE_PAGE | PTE_AF | PTE_SHARED)
#define PROT_SECT_DEFAULT	(PMD_TYPE_SECT | PMD_SECT_AF | PMD_SECT_S)
#else
#define PROT_DEFAULT		(PTE_TYPE_PAGE | PTE_AF)
#define PROT_SECT_DEFAULT	(PMD_TYPE_SECT | PMD_SECT_AF)
#endif

#define PROT_DEVICE_nGnRE	(PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_ATTRINDX(MT_DEVICE_nGnRE))
#define PROT_NORMAL_NC		(PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_ATTRINDX(MT_NORMAL_NC))
#define PROT_NORMAL		(PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_ATTRINDX(MT_NORMAL))

#define PROT_SECT_DEVICE_nGnRE	(PROT_SECT_DEFAULT | PMD_SECT_PXN | PMD_SECT_UXN | PMD_ATTRINDX(MT_DEVICE_nGnRE))
#define PROT_SECT_NORMAL	(PROT_SECT_DEFAULT | PMD_SECT_PXN | PMD_SECT_UXN | PMD_ATTRINDX(MT_NORMAL))
#define PROT_SECT_NORMAL_EXEC	(PROT_SECT_DEFAULT | PMD_SECT_UXN | PMD_ATTRINDX(MT_NORMAL))

#define _PAGE_DEFAULT		(PROT_DEFAULT | PTE_ATTRINDX(MT_NORMAL))

#define PAGE_KERNEL		__pgprot(_PAGE_DEFAULT | PTE_PXN | PTE_UXN | PTE_DIRTY | PTE_WRITE)
#define PAGE_KERNEL_EXEC	__pgprot(_PAGE_DEFAULT | PTE_UXN | PTE_DIRTY | PTE_WRITE)

#define PAGE_HYP		__pgprot(_PAGE_DEFAULT | PTE_HYP)
#define PAGE_HYP_DEVICE		__pgprot(PROT_DEVICE_nGnRE | PTE_HYP)

#define PAGE_S2			__pgprot(PROT_DEFAULT | PTE_S2_MEMATTR(MT_S2_NORMAL) | PTE_S2_RDONLY)
#define PAGE_S2_DEVICE		__pgprot(PROT_DEFAULT | PTE_S2_MEMATTR(MT_S2_DEVICE_nGnRE) | PTE_S2_RDWR | PTE_UXN)

#define PAGE_NONE		__pgprot(((_PAGE_DEFAULT) & ~PTE_TYPE_MASK) | PTE_PROT_NONE | PTE_PXN | PTE_UXN)
#define PAGE_SHARED		__pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN | PTE_UXN | PTE_WRITE)
#define PAGE_SHARED_EXEC	__pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN | PTE_WRITE)
#define PAGE_COPY		__pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN | PTE_UXN)
#define PAGE_COPY_EXEC		__pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN)
#define PAGE_READONLY		__pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN | PTE_UXN)
#define PAGE_READONLY_EXEC	__pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN)

#define __P000  PAGE_NONE
#define __P001  PAGE_READONLY
#define __P010  PAGE_COPY
#define __P011  PAGE_COPY
#define __P100  PAGE_READONLY_EXEC
#define __P101  PAGE_READONLY_EXEC
#define __P110  PAGE_COPY_EXEC
#define __P111  PAGE_COPY_EXEC

#define __S000  PAGE_NONE
#define __S001  PAGE_READONLY
#define __S010  PAGE_SHARED
#define __S011  PAGE_SHARED
#define __S100  PAGE_READONLY_EXEC
#define __S101  PAGE_READONLY_EXEC
#define __S110  PAGE_SHARED_EXEC
#define __S111  PAGE_SHARED_EXEC

/*
 * ZERO_PAGE is a global shared page that is always zero: used
 * for zero-mapped memory areas etc..
 */
extern struct page *empty_zero_page;
#define ZERO_PAGE(vaddr)	(empty_zero_page)

#define pte_pfn(pte)		((pte_val(pte) & PHYS_MASK) >> PAGE_SHIFT)

#define pfn_pte(pfn,prot)	(__pte(((phys_addr_t)(pfn) << PAGE_SHIFT) | pgprot_val(prot)))

#define pte_none(pte)		(!pte_val(pte))
#define pte_clear(mm,addr,ptep)	set_pte(ptep, __pte(0))
#define pte_page(pte)		(pfn_to_page(pte_pfn(pte)))
#define pte_offset_kernel(dir,addr)	(pmd_page_vaddr(*(dir)) + pte_index(addr))

#define pte_offset_map(dir,addr)	pte_offset_kernel((dir), (addr))
#define pte_offset_map_nested(dir,addr)	pte_offset_kernel((dir), (addr))
#define pte_unmap(pte)			do { } while (0)
#define pte_unmap_nested(pte)		do { } while (0)

/*
 * The following only work if pte_present(). Undefined behaviour otherwise.
 */
#define pte_present(pte)	(!!(pte_val(pte) & (PTE_VALID | PTE_PROT_NONE)))
#define pte_dirty(pte)		(!!(pte_val(pte) & PTE_DIRTY))
#define pte_young(pte)		(!!(pte_val(pte) & PTE_AF))
#define pte_special(pte)	(!!(pte_val(pte) & PTE_SPECIAL))
#define pte_write(pte)		(!!(pte_val(pte) & PTE_WRITE))
#define pte_exec(pte)		(!(pte_val(pte) & PTE_UXN))

#define pte_valid_user(pte) \
	((pte_val(pte) & (PTE_VALID | PTE_USER)) == (PTE_VALID | PTE_USER))

static inline pte_t pte_wrprotect(pte_t pte)
{
	pte_val(pte) &= ~PTE_WRITE;
	return pte;
}

static inline pte_t pte_mkwrite(pte_t pte)
{
	pte_val(pte) |= PTE_WRITE;
	return pte;
}

static inline pte_t pte_mkclean(pte_t pte)
{
	pte_val(pte) &= ~PTE_DIRTY;
	return pte;
}

static inline pte_t pte_mkdirty(pte_t pte)
{
	pte_val(pte) |= PTE_DIRTY;
	return pte;
}

static inline pte_t pte_mkold(pte_t pte)
{
	pte_val(pte) &= ~PTE_AF;
	return pte;
}

static inline pte_t pte_mkyoung(pte_t pte)
{
	pte_val(pte) |= PTE_AF;
	return pte;
}

static inline pte_t pte_mkspecial(pte_t pte)
{
	pte_val(pte) |= PTE_SPECIAL;
	return pte;
}

static inline void set_pte(pte_t *ptep, pte_t pte)
{
	*ptep = pte;
}

extern void __sync_icache_dcache(pte_t pteval, unsigned long addr);

static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
			      pte_t *ptep, pte_t pte)
{
	if (pte_valid_user(pte)) {
		if (!pte_special(pte) && pte_exec(pte))
			__sync_icache_dcache(pte, addr);
		if (pte_dirty(pte) && pte_write(pte))
			pte_val(pte) &= ~PTE_RDONLY;
		else
			pte_val(pte) |= PTE_RDONLY;
	}

	set_pte(ptep, pte);
}

/*
 * Huge pte definitions.
 */
#define pte_huge(pte)		(!(pte_val(pte) & PTE_TABLE_BIT))
#define pte_mkhuge(pte)		(__pte(pte_val(pte) & ~PTE_TABLE_BIT))

/*
 * Hugetlb definitions.
 */
#define HUGE_MAX_HSTATE		2
#define HPAGE_SHIFT		PMD_SHIFT
#define HPAGE_SIZE		(_AC(1, UL) << HPAGE_SHIFT)
#define HPAGE_MASK		(~(HPAGE_SIZE - 1))
#define HUGETLB_PAGE_ORDER	(HPAGE_SHIFT - PAGE_SHIFT)

#define __HAVE_ARCH_PTE_SPECIAL

static inline pte_t pmd_pte(pmd_t pmd)
{
	return __pte(pmd_val(pmd));
}

static inline pmd_t pte_pmd(pte_t pte)
{
	return __pmd(pte_val(pte));
}

/*
 * THP definitions.
 */

#ifdef CONFIG_TRANSPARENT_HUGEPAGE
#define pmd_trans_huge(pmd)	(pmd_val(pmd) && !(pmd_val(pmd) & PMD_TABLE_BIT))
#define pmd_trans_splitting(pmd)	pte_special(pmd_pte(pmd))
#endif

#define pmd_young(pmd)		pte_young(pmd_pte(pmd))
#define pmd_wrprotect(pmd)	pte_pmd(pte_wrprotect(pmd_pte(pmd)))
#define pmd_mksplitting(pmd)	pte_pmd(pte_mkspecial(pmd_pte(pmd)))
#define pmd_mkold(pmd)		pte_pmd(pte_mkold(pmd_pte(pmd)))
#define pmd_mkwrite(pmd)	pte_pmd(pte_mkwrite(pmd_pte(pmd)))
#define pmd_mkdirty(pmd)	pte_pmd(pte_mkdirty(pmd_pte(pmd)))
#define pmd_mkyoung(pmd)	pte_pmd(pte_mkyoung(pmd_pte(pmd)))
#define pmd_mknotpresent(pmd)	(__pmd(pmd_val(pmd) & ~PMD_TYPE_MASK))

#define __HAVE_ARCH_PMD_WRITE
#define pmd_write(pmd)		pte_write(pmd_pte(pmd))

#define pmd_mkhuge(pmd)		(__pmd(pmd_val(pmd) & ~PMD_TABLE_BIT))

#define pmd_pfn(pmd)		(((pmd_val(pmd) & PMD_MASK) & PHYS_MASK) >> PAGE_SHIFT)
#define pfn_pmd(pfn,prot)	(__pmd(((phys_addr_t)(pfn) << PAGE_SHIFT) | pgprot_val(prot)))
#define mk_pmd(page,prot)	pfn_pmd(page_to_pfn(page),prot)

#define pmd_page(pmd)           pfn_to_page(__phys_to_pfn(pmd_val(pmd) & PHYS_MASK))
#define pud_pfn(pud)		(((pud_val(pud) & PUD_MASK) & PHYS_MASK) >> PAGE_SHIFT)

#define set_pmd_at(mm, addr, pmdp, pmd)	set_pte_at(mm, addr, (pte_t *)pmdp, pmd_pte(pmd))

static inline int has_transparent_hugepage(void)
{
	return 1;
}

#define __pgprot_modify(prot,mask,bits) \
	__pgprot((pgprot_val(prot) & ~(mask)) | (bits))

/*
 * Mark the prot value as uncacheable and unbufferable.
 */
#define pgprot_noncached(prot) \
	__pgprot_modify(prot, PTE_ATTRINDX_MASK, PTE_ATTRINDX(MT_DEVICE_nGnRnE) | PTE_PXN | PTE_UXN)
#define pgprot_writecombine(prot) \
	__pgprot_modify(prot, PTE_ATTRINDX_MASK, PTE_ATTRINDX(MT_NORMAL_NC) | PTE_PXN | PTE_UXN)
#define __HAVE_PHYS_MEM_ACCESS_PROT
struct file;
extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
				     unsigned long size, pgprot_t vma_prot);

#define pmd_none(pmd)		(!pmd_val(pmd))
#define pmd_present(pmd)	(pmd_val(pmd))

#define pmd_bad(pmd)		(!(pmd_val(pmd) & 2))

#define pmd_table(pmd)		((pmd_val(pmd) & PMD_TYPE_MASK) == \
				 PMD_TYPE_TABLE)
#define pmd_sect(pmd)		((pmd_val(pmd) & PMD_TYPE_MASK) == \
				 PMD_TYPE_SECT)

#ifdef CONFIG_ARM64_64K_PAGES
#define pud_sect(pud)		(0)
#else
#define pud_sect(pud)		((pud_val(pud) & PUD_TYPE_MASK) == \
				 PUD_TYPE_SECT)
#endif

static inline void set_pmd(pmd_t *pmdp, pmd_t pmd)
{
	*pmdp = pmd;
	dsb(ishst);
}

static inline void pmd_clear(pmd_t *pmdp)
{
	set_pmd(pmdp, __pmd(0));
}

static inline pte_t *pmd_page_vaddr(pmd_t pmd)
{
	return __va(pmd_val(pmd) & PHYS_MASK & (s32)PAGE_MASK);
}

#define pmd_page(pmd)		pfn_to_page(__phys_to_pfn(pmd_val(pmd) & PHYS_MASK))

/*
 * Conversion functions: convert a page and protection to a page entry,
 * and a page entry and page directory to the page they refer to.
 */
#define mk_pte(page,prot)	pfn_pte(page_to_pfn(page),prot)

#ifndef CONFIG_ARM64_2_LEVELS

#define pud_none(pud)		(!pud_val(pud))
#define pud_bad(pud)		(!(pud_val(pud) & 2))
#define pud_present(pud)	(pud_val(pud))

static inline void set_pud(pud_t *pudp, pud_t pud)
{
	*pudp = pud;
	dsb(ishst);
}

static inline void pud_clear(pud_t *pudp)
{
	set_pud(pudp, __pud(0));
}

static inline pmd_t *pud_page_vaddr(pud_t pud)
{
	return __va(pud_val(pud) & PHYS_MASK & (s32)PAGE_MASK);
}

#endif	/* CONFIG_ARM64_2_LEVELS */

/* to find an entry in a page-table-directory */
#define pgd_index(addr)		(((addr) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))

#define pgd_offset(mm, addr)	((mm)->pgd+pgd_index(addr))

/* to find an entry in a kernel page-table-directory */
#define pgd_offset_k(addr)	pgd_offset(&init_mm, addr)

/* Find an entry in the second-level page table.. */
#ifndef CONFIG_ARM64_2_LEVELS
#define pmd_index(addr)		(((addr) >> PMD_SHIFT) & (PTRS_PER_PMD - 1))
static inline pmd_t *pmd_offset(pud_t *pud, unsigned long addr)
{
	return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(addr);
}
#endif

/* Find an entry in the third-level page table.. */
#define pte_index(addr)		(((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))

static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
{
	const pteval_t mask = PTE_USER | PTE_PXN | PTE_UXN | PTE_RDONLY |
			      PTE_PROT_NONE | PTE_VALID | PTE_WRITE;
	pte_val(pte) = (pte_val(pte) & ~mask) | (pgprot_val(newprot) & mask);
	return pte;
}

static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
{
	return pte_pmd(pte_modify(pmd_pte(pmd), newprot));
}

extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
extern pgd_t idmap_pg_dir[PTRS_PER_PGD];

/*
 * Encode and decode a swap entry:
 *	bits 0-1:	present (must be zero)
 *	bit  2:		PTE_FILE
 *	bits 3-8:	swap type
 *	bits 9-57:	swap offset
 */
#define __SWP_TYPE_SHIFT	3
#define __SWP_TYPE_BITS		6
#define __SWP_OFFSET_BITS	49
#define __SWP_TYPE_MASK		((1 << __SWP_TYPE_BITS) - 1)
#define __SWP_OFFSET_SHIFT	(__SWP_TYPE_BITS + __SWP_TYPE_SHIFT)
#define __SWP_OFFSET_MASK	((1UL << __SWP_OFFSET_BITS) - 1)

#define __swp_type(x)		(((x).val >> __SWP_TYPE_SHIFT) & __SWP_TYPE_MASK)
#define __swp_offset(x)		(((x).val >> __SWP_OFFSET_SHIFT) & __SWP_OFFSET_MASK)
#define __swp_entry(type,offset) ((swp_entry_t) { ((type) << __SWP_TYPE_SHIFT) | ((offset) << __SWP_OFFSET_SHIFT) })

#define __pte_to_swp_entry(pte)	((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(swp)	((pte_t) { (swp).val })

/*
 * Ensure that there are not more swap files than can be encoded in the kernel
 * PTEs.
 */
#define MAX_SWAPFILES_CHECK() BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > __SWP_TYPE_BITS)

/*
 * Encode and decode a file entry:
 *	bits 0-1:	present (must be zero)
 *	bit  2:		PTE_FILE
 *	bits 3-57:	file offset / PAGE_SIZE
 */
#define pte_file(pte)		(pte_val(pte) & PTE_FILE)
#define pte_to_pgoff(x)		(pte_val(x) >> 3)
#define pgoff_to_pte(x)		__pte(((x) << 3) | PTE_FILE)

#define PTE_FILE_MAX_BITS	55

extern int kern_addr_valid(unsigned long addr);

#include <asm-generic/pgtable.h>

#define pgtable_cache_init() do { } while (0)

#endif /* !__ASSEMBLY__ */

#endif /* __ASM_PGTABLE_H */
Commit	Line	Data
4f04d8f0 CM	1	/*
	2	* Copyright (C) 2012 ARM Ltd.
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License version 2 as
	6	* published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful,
	9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	11	* GNU General Public License for more details.
	12	*
	13	* You should have received a copy of the GNU General Public License
	14	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	15	*/
	16	#ifndef __ASM_PGTABLE_H
	17	#define __ASM_PGTABLE_H
	18
	19	#include <asm/proc-fns.h>
	20
	21	#include <asm/memory.h>
	22	#include <asm/pgtable-hwdef.h>
	23
	24	/*
	25	* Software defined PTE bits definition.
	26	*/
a6fadf7e	27	#define PTE_VALID (_AT(pteval_t, 1) << 0)
3676f9ef	28	#define PTE_FILE (_AT(pteval_t, 1) << 2) /* only when !pte_present() */
4f04d8f0 CM	29	#define PTE_DIRTY (_AT(pteval_t, 1) << 55)
4f04d8f0 CM	30	#define PTE_SPECIAL (_AT(pteval_t, 1) << 56)
c2c93e5b	31	#define PTE_WRITE (_AT(pteval_t, 1) << 57)
3676f9ef	32	#define PTE_PROT_NONE (_AT(pteval_t, 1) << 58) /* only when !PTE_VALID */
4f04d8f0 CM	33
	34	/*
	35	* VMALLOC and SPARSEMEM_VMEMMAP ranges.
	36	*/
847264fb	37	#define VMALLOC_START (UL(0xffffffffffffffff) << VA_BITS)
4f04d8f0 CM	38	#define VMALLOC_END (PAGE_OFFSET - UL(0x400000000) - SZ_64K)
	39
	40	#define vmemmap ((struct page *)(VMALLOC_END + SZ_64K))
	41
	42	#define FIRST_USER_ADDRESS 0
	43
	44	#ifndef __ASSEMBLY__
	45	extern void __pte_error(const char *file, int line, unsigned long val);
	46	extern void __pmd_error(const char *file, int line, unsigned long val);
	47	extern void __pgd_error(const char *file, int line, unsigned long val);
	48
	49	#define pte_ERROR(pte) __pte_error(__FILE__, __LINE__, pte_val(pte))
e41ceed0	50	#ifndef CONFIG_ARM64_2_LEVELS
4f04d8f0 CM	51	#define pmd_ERROR(pmd) __pmd_error(__FILE__, __LINE__, pmd_val(pmd))
	52	#endif
	53	#define pgd_ERROR(pgd) __pgd_error(__FILE__, __LINE__, pgd_val(pgd))
	54
a501e324 CM	55	#ifdef CONFIG_SMP
	56	#define PROT_DEFAULT (PTE_TYPE_PAGE \| PTE_AF \| PTE_SHARED)
	57	#define PROT_SECT_DEFAULT (PMD_TYPE_SECT \| PMD_SECT_AF \| PMD_SECT_S)
	58	#else
	59	#define PROT_DEFAULT (PTE_TYPE_PAGE \| PTE_AF)
	60	#define PROT_SECT_DEFAULT (PMD_TYPE_SECT \| PMD_SECT_AF)
	61	#endif
4f04d8f0	62
a501e324 CM	63	#define PROT_DEVICE_nGnRE (PROT_DEFAULT \| PTE_PXN \| PTE_UXN \| PTE_ATTRINDX(MT_DEVICE_nGnRE))
	64	#define PROT_NORMAL_NC (PROT_DEFAULT \| PTE_PXN \| PTE_UXN \| PTE_ATTRINDX(MT_NORMAL_NC))
	65	#define PROT_NORMAL (PROT_DEFAULT \| PTE_PXN \| PTE_UXN \| PTE_ATTRINDX(MT_NORMAL))
4f04d8f0	66
a501e324 CM	67	#define PROT_SECT_DEVICE_nGnRE (PROT_SECT_DEFAULT \| PMD_SECT_PXN \| PMD_SECT_UXN \| PMD_ATTRINDX(MT_DEVICE_nGnRE))
	68	#define PROT_SECT_NORMAL (PROT_SECT_DEFAULT \| PMD_SECT_PXN \| PMD_SECT_UXN \| PMD_ATTRINDX(MT_NORMAL))
	69	#define PROT_SECT_NORMAL_EXEC (PROT_SECT_DEFAULT \| PMD_SECT_UXN \| PMD_ATTRINDX(MT_NORMAL))
a6fadf7e	70
a501e324	71	#define _PAGE_DEFAULT (PROT_DEFAULT \| PTE_ATTRINDX(MT_NORMAL))
4f04d8f0	72
a501e324 CM	73	#define PAGE_KERNEL __pgprot(_PAGE_DEFAULT \| PTE_PXN \| PTE_UXN \| PTE_DIRTY \| PTE_WRITE)
a501e324 CM	74	#define PAGE_KERNEL_EXEC __pgprot(_PAGE_DEFAULT \| PTE_UXN \| PTE_DIRTY \| PTE_WRITE)
8e620b04	75
a501e324	76	#define PAGE_HYP __pgprot(_PAGE_DEFAULT \| PTE_HYP)
36311607 MZ	77	#define PAGE_HYP_DEVICE __pgprot(PROT_DEVICE_nGnRE \| PTE_HYP)
36311607 MZ	78
a501e324	79	#define PAGE_S2 __pgprot(PROT_DEFAULT \| PTE_S2_MEMATTR(MT_S2_NORMAL) \| PTE_S2_RDONLY)
36311607 MZ	80	#define PAGE_S2_DEVICE __pgprot(PROT_DEFAULT \| PTE_S2_MEMATTR(MT_S2_DEVICE_nGnRE) \| PTE_S2_RDWR \| PTE_UXN)
36311607 MZ	81
a501e324 CM	82	#define PAGE_NONE __pgprot(((_PAGE_DEFAULT) & ~PTE_TYPE_MASK) \| PTE_PROT_NONE \| PTE_PXN \| PTE_UXN)
	83	#define PAGE_SHARED __pgprot(_PAGE_DEFAULT \| PTE_USER \| PTE_NG \| PTE_PXN \| PTE_UXN \| PTE_WRITE)
	84	#define PAGE_SHARED_EXEC __pgprot(_PAGE_DEFAULT \| PTE_USER \| PTE_NG \| PTE_PXN \| PTE_WRITE)
	85	#define PAGE_COPY __pgprot(_PAGE_DEFAULT \| PTE_USER \| PTE_NG \| PTE_PXN \| PTE_UXN)
	86	#define PAGE_COPY_EXEC __pgprot(_PAGE_DEFAULT \| PTE_USER \| PTE_NG \| PTE_PXN)
	87	#define PAGE_READONLY __pgprot(_PAGE_DEFAULT \| PTE_USER \| PTE_NG \| PTE_PXN \| PTE_UXN)
	88	#define PAGE_READONLY_EXEC __pgprot(_PAGE_DEFAULT \| PTE_USER \| PTE_NG \| PTE_PXN)
a501e324 CM	89
	90	#define __P000 PAGE_NONE
	91	#define __P001 PAGE_READONLY
	92	#define __P010 PAGE_COPY
	93	#define __P011 PAGE_COPY
5a0fdfad	94	#define __P100 PAGE_READONLY_EXEC
a501e324 CM	95	#define __P101 PAGE_READONLY_EXEC
	96	#define __P110 PAGE_COPY_EXEC
	97	#define __P111 PAGE_COPY_EXEC
	98
	99	#define __S000 PAGE_NONE
	100	#define __S001 PAGE_READONLY
	101	#define __S010 PAGE_SHARED
	102	#define __S011 PAGE_SHARED
5a0fdfad	103	#define __S100 PAGE_READONLY_EXEC
a501e324 CM	104	#define __S101 PAGE_READONLY_EXEC
	105	#define __S110 PAGE_SHARED_EXEC
	106	#define __S111 PAGE_SHARED_EXEC
4f04d8f0	107
4f04d8f0 CM	108	/*
	109	* ZERO_PAGE is a global shared page that is always zero: used
	110	* for zero-mapped memory areas etc..
	111	*/
	112	extern struct page *empty_zero_page;
	113	#define ZERO_PAGE(vaddr) (empty_zero_page)
	114
	115	#define pte_pfn(pte) ((pte_val(pte) & PHYS_MASK) >> PAGE_SHIFT)
	116
	117	#define pfn_pte(pfn,prot) (__pte(((phys_addr_t)(pfn) << PAGE_SHIFT) \| pgprot_val(prot)))
	118
	119	#define pte_none(pte) (!pte_val(pte))
	120	#define pte_clear(mm,addr,ptep) set_pte(ptep, __pte(0))
	121	#define pte_page(pte) (pfn_to_page(pte_pfn(pte)))
9ab6d02f	122	#define pte_offset_kernel(dir,addr) (pmd_page_vaddr(*(dir)) + pte_index(addr))
4f04d8f0 CM	123
	124	#define pte_offset_map(dir,addr) pte_offset_kernel((dir), (addr))
	125	#define pte_offset_map_nested(dir,addr) pte_offset_kernel((dir), (addr))
	126	#define pte_unmap(pte) do { } while (0)
	127	#define pte_unmap_nested(pte) do { } while (0)
	128
	129	/*
	130	* The following only work if pte_present(). Undefined behaviour otherwise.
	131	*/
84fe6826 SC	132	#define pte_present(pte) (!!(pte_val(pte) & (PTE_VALID \| PTE_PROT_NONE)))
	133	#define pte_dirty(pte) (!!(pte_val(pte) & PTE_DIRTY))
	134	#define pte_young(pte) (!!(pte_val(pte) & PTE_AF))
	135	#define pte_special(pte) (!!(pte_val(pte) & PTE_SPECIAL))
	136	#define pte_write(pte) (!!(pte_val(pte) & PTE_WRITE))
8e620b04	137	#define pte_exec(pte) (!(pte_val(pte) & PTE_UXN))
4f04d8f0	138
a6fadf7e	139	#define pte_valid_user(pte) \
02522463	140	((pte_val(pte) & (PTE_VALID \| PTE_USER)) == (PTE_VALID \| PTE_USER))
4f04d8f0	141
44b6dfc5 SC	142	static inline pte_t pte_wrprotect(pte_t pte)
44b6dfc5 SC	143	{
c2c93e5b	144	pte_val(pte) &= ~PTE_WRITE;
44b6dfc5 SC	145	return pte;
	146	}
	147
	148	static inline pte_t pte_mkwrite(pte_t pte)
	149	{
c2c93e5b	150	pte_val(pte) \|= PTE_WRITE;
44b6dfc5 SC	151	return pte;
	152	}
	153
	154	static inline pte_t pte_mkclean(pte_t pte)
	155	{
	156	pte_val(pte) &= ~PTE_DIRTY;
	157	return pte;
	158	}
	159
	160	static inline pte_t pte_mkdirty(pte_t pte)
	161	{
	162	pte_val(pte) \|= PTE_DIRTY;
	163	return pte;
	164	}
	165
	166	static inline pte_t pte_mkold(pte_t pte)
	167	{
	168	pte_val(pte) &= ~PTE_AF;
	169	return pte;
	170	}
	171
	172	static inline pte_t pte_mkyoung(pte_t pte)
	173	{
	174	pte_val(pte) \|= PTE_AF;
	175	return pte;
	176	}
	177
	178	static inline pte_t pte_mkspecial(pte_t pte)
	179	{
	180	pte_val(pte) \|= PTE_SPECIAL;
	181	return pte;
	182	}
4f04d8f0 CM	183
	184	static inline void set_pte(pte_t *ptep, pte_t pte)
	185	{
	186	*ptep = pte;
	187	}
	188
	189	extern void __sync_icache_dcache(pte_t pteval, unsigned long addr);
	190
	191	static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
	192	pte_t *ptep, pte_t pte)
	193	{
a6fadf7e	194	if (pte_valid_user(pte)) {
71fdb6bf	195	if (!pte_special(pte) && pte_exec(pte))
02522463	196	__sync_icache_dcache(pte, addr);
c2c93e5b SC	197	if (pte_dirty(pte) && pte_write(pte))
	198	pte_val(pte) &= ~PTE_RDONLY;
	199	else
	200	pte_val(pte) \|= PTE_RDONLY;
02522463 WD	201	}
02522463 WD	202
4f04d8f0 CM	203	set_pte(ptep, pte);
	204	}
	205
	206	/*
	207	* Huge pte definitions.
	208	*/
084bd298 SC	209	#define pte_huge(pte) (!(pte_val(pte) & PTE_TABLE_BIT))
	210	#define pte_mkhuge(pte) (__pte(pte_val(pte) & ~PTE_TABLE_BIT))
	211
	212	/*
	213	* Hugetlb definitions.
	214	*/
	215	#define HUGE_MAX_HSTATE 2
	216	#define HPAGE_SHIFT PMD_SHIFT
	217	#define HPAGE_SIZE (_AC(1, UL) << HPAGE_SHIFT)
	218	#define HPAGE_MASK (~(HPAGE_SIZE - 1))
	219	#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
4f04d8f0	220
4f04d8f0 CM	221	#define __HAVE_ARCH_PTE_SPECIAL
4f04d8f0 CM	222
9c7e535f SC	223	static inline pte_t pmd_pte(pmd_t pmd)
	224	{
	225	return __pte(pmd_val(pmd));
	226	}
af074848	227
9c7e535f SC	228	static inline pmd_t pte_pmd(pte_t pte)
	229	{
	230	return __pmd(pte_val(pte));
	231	}
af074848 SC	232
	233	/*
	234	* THP definitions.
	235	*/
af074848 SC	236
	237	#ifdef CONFIG_TRANSPARENT_HUGEPAGE
	238	#define pmd_trans_huge(pmd) (pmd_val(pmd) && !(pmd_val(pmd) & PMD_TABLE_BIT))
9c7e535f	239	#define pmd_trans_splitting(pmd) pte_special(pmd_pte(pmd))
af074848 SC	240	#endif
af074848 SC	241
9c7e535f SC	242	#define pmd_young(pmd) pte_young(pmd_pte(pmd))
	243	#define pmd_wrprotect(pmd) pte_pmd(pte_wrprotect(pmd_pte(pmd)))
	244	#define pmd_mksplitting(pmd) pte_pmd(pte_mkspecial(pmd_pte(pmd)))
	245	#define pmd_mkold(pmd) pte_pmd(pte_mkold(pmd_pte(pmd)))
	246	#define pmd_mkwrite(pmd) pte_pmd(pte_mkwrite(pmd_pte(pmd)))
	247	#define pmd_mkdirty(pmd) pte_pmd(pte_mkdirty(pmd_pte(pmd)))
	248	#define pmd_mkyoung(pmd) pte_pmd(pte_mkyoung(pmd_pte(pmd)))
e3a920af	249	#define pmd_mknotpresent(pmd) (__pmd(pmd_val(pmd) & ~PMD_TYPE_MASK))
af074848	250
9c7e535f SC	251	#define __HAVE_ARCH_PMD_WRITE
9c7e535f SC	252	#define pmd_write(pmd) pte_write(pmd_pte(pmd))
af074848 SC	253
	254	#define pmd_mkhuge(pmd) (__pmd(pmd_val(pmd) & ~PMD_TABLE_BIT))
	255
	256	#define pmd_pfn(pmd) (((pmd_val(pmd) & PMD_MASK) & PHYS_MASK) >> PAGE_SHIFT)
	257	#define pfn_pmd(pfn,prot) (__pmd(((phys_addr_t)(pfn) << PAGE_SHIFT) \| pgprot_val(prot)))
	258	#define mk_pmd(page,prot) pfn_pmd(page_to_pfn(page),prot)
	259
	260	#define pmd_page(pmd) pfn_to_page(__phys_to_pfn(pmd_val(pmd) & PHYS_MASK))
206a2a73	261	#define pud_pfn(pud) (((pud_val(pud) & PUD_MASK) & PHYS_MASK) >> PAGE_SHIFT)
af074848	262
ceb21835	263	#define set_pmd_at(mm, addr, pmdp, pmd) set_pte_at(mm, addr, (pte_t *)pmdp, pmd_pte(pmd))
af074848 SC	264
	265	static inline int has_transparent_hugepage(void)
	266	{
	267	return 1;
	268	}
	269
a501e324 CM	270	#define __pgprot_modify(prot,mask,bits) \
	271	__pgprot((pgprot_val(prot) & ~(mask)) \| (bits))
	272
4f04d8f0 CM	273	/*
	274	* Mark the prot value as uncacheable and unbufferable.
	275	*/
	276	#define pgprot_noncached(prot) \
de2db743	277	__pgprot_modify(prot, PTE_ATTRINDX_MASK, PTE_ATTRINDX(MT_DEVICE_nGnRnE) \| PTE_PXN \| PTE_UXN)
4f04d8f0	278	#define pgprot_writecombine(prot) \
de2db743	279	__pgprot_modify(prot, PTE_ATTRINDX_MASK, PTE_ATTRINDX(MT_NORMAL_NC) \| PTE_PXN \| PTE_UXN)
4f04d8f0 CM	280	#define __HAVE_PHYS_MEM_ACCESS_PROT
	281	struct file;
	282	extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
	283	unsigned long size, pgprot_t vma_prot);
	284
	285	#define pmd_none(pmd) (!pmd_val(pmd))
	286	#define pmd_present(pmd) (pmd_val(pmd))
	287
	288	#define pmd_bad(pmd) (!(pmd_val(pmd) & 2))
	289
36311607 MZ	290	#define pmd_table(pmd) ((pmd_val(pmd) & PMD_TYPE_MASK) == \
	291	PMD_TYPE_TABLE)
	292	#define pmd_sect(pmd) ((pmd_val(pmd) & PMD_TYPE_MASK) == \
	293	PMD_TYPE_SECT)
	294
f3b766a2	295	#ifdef CONFIG_ARM64_64K_PAGES
206a2a73 SC	296	#define pud_sect(pud) (0)
	297	#else
	298	#define pud_sect(pud) ((pud_val(pud) & PUD_TYPE_MASK) == \
	299	PUD_TYPE_SECT)
	300	#endif
36311607	301
4f04d8f0 CM	302	static inline void set_pmd(pmd_t *pmdp, pmd_t pmd)
	303	{
	304	*pmdp = pmd;
98f7685e	305	dsb(ishst);
4f04d8f0 CM	306	}
	307
	308	static inline void pmd_clear(pmd_t *pmdp)
	309	{
	310	set_pmd(pmdp, __pmd(0));
	311	}
	312
	313	static inline pte_t *pmd_page_vaddr(pmd_t pmd)
	314	{
	315	return __va(pmd_val(pmd) & PHYS_MASK & (s32)PAGE_MASK);
	316	}
	317
	318	#define pmd_page(pmd) pfn_to_page(__phys_to_pfn(pmd_val(pmd) & PHYS_MASK))
	319
	320	/*
	321	* Conversion functions: convert a page and protection to a page entry,
	322	* and a page entry and page directory to the page they refer to.
	323	*/
	324	#define mk_pte(page,prot) pfn_pte(page_to_pfn(page),prot)
	325
e41ceed0	326	#ifndef CONFIG_ARM64_2_LEVELS
4f04d8f0 CM	327
	328	#define pud_none(pud) (!pud_val(pud))
	329	#define pud_bad(pud) (!(pud_val(pud) & 2))
	330	#define pud_present(pud) (pud_val(pud))
	331
	332	static inline void set_pud(pud_t *pudp, pud_t pud)
	333	{
	334	*pudp = pud;
98f7685e	335	dsb(ishst);
4f04d8f0 CM	336	}
	337
	338	static inline void pud_clear(pud_t *pudp)
	339	{
	340	set_pud(pudp, __pud(0));
	341	}
	342
	343	static inline pmd_t *pud_page_vaddr(pud_t pud)
	344	{
	345	return __va(pud_val(pud) & PHYS_MASK & (s32)PAGE_MASK);
	346	}
	347
e41ceed0	348	#endif /* CONFIG_ARM64_2_LEVELS */
4f04d8f0 CM	349
	350	/* to find an entry in a page-table-directory */
	351	#define pgd_index(addr) (((addr) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
	352
	353	#define pgd_offset(mm, addr) ((mm)->pgd+pgd_index(addr))
	354
	355	/* to find an entry in a kernel page-table-directory */
	356	#define pgd_offset_k(addr) pgd_offset(&init_mm, addr)
	357
	358	/* Find an entry in the second-level page table.. */
e41ceed0	359	#ifndef CONFIG_ARM64_2_LEVELS
4f04d8f0 CM	360	#define pmd_index(addr) (((addr) >> PMD_SHIFT) & (PTRS_PER_PMD - 1))
	361	static inline pmd_t pmd_offset(pud_t pud, unsigned long addr)
	362	{
	363	return (pmd_t )pud_page_vaddr(pud) + pmd_index(addr);
	364	}
	365	#endif
	366
	367	/* Find an entry in the third-level page table.. */
9ab6d02f	368	#define pte_index(addr) (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
4f04d8f0 CM	369
	370	static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
	371	{
a6fadf7e	372	const pteval_t mask = PTE_USER \| PTE_PXN \| PTE_UXN \| PTE_RDONLY \|
c2c93e5b	373	PTE_PROT_NONE \| PTE_VALID \| PTE_WRITE;
4f04d8f0 CM	374	pte_val(pte) = (pte_val(pte) & ~mask) \| (pgprot_val(newprot) & mask);
	375	return pte;
	376	}
	377
9c7e535f SC	378	static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
	379	{
	380	return pte_pmd(pte_modify(pmd_pte(pmd), newprot));
	381	}
	382
4f04d8f0 CM	383	extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
	384	extern pgd_t idmap_pg_dir[PTRS_PER_PGD];
	385
4f04d8f0 CM	386	/*
4f04d8f0 CM	387	* Encode and decode a swap entry:
3676f9ef CM	388	* bits 0-1: present (must be zero)
	389	* bit 2: PTE_FILE
	390	* bits 3-8: swap type
	391	* bits 9-57: swap offset
4f04d8f0	392	*/
3676f9ef	393	#define __SWP_TYPE_SHIFT 3
4f04d8f0	394	#define __SWP_TYPE_BITS 6
3676f9ef	395	#define __SWP_OFFSET_BITS 49
4f04d8f0 CM	396	#define __SWP_TYPE_MASK ((1 << __SWP_TYPE_BITS) - 1)
4f04d8f0 CM	397	#define __SWP_OFFSET_SHIFT (__SWP_TYPE_BITS + __SWP_TYPE_SHIFT)
3676f9ef	398	#define __SWP_OFFSET_MASK ((1UL << __SWP_OFFSET_BITS) - 1)
4f04d8f0 CM	399
4f04d8f0 CM	400	#define __swp_type(x) (((x).val >> __SWP_TYPE_SHIFT) & __SWP_TYPE_MASK)
3676f9ef	401	#define __swp_offset(x) (((x).val >> __SWP_OFFSET_SHIFT) & __SWP_OFFSET_MASK)
4f04d8f0 CM	402	#define __swp_entry(type,offset) ((swp_entry_t) { ((type) << __SWP_TYPE_SHIFT) \| ((offset) << __SWP_OFFSET_SHIFT) })
	403
	404	#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
	405	#define __swp_entry_to_pte(swp) ((pte_t) { (swp).val })
	406
	407	/*
	408	* Ensure that there are not more swap files than can be encoded in the kernel
aad9061b	409	* PTEs.
4f04d8f0 CM	410	*/
	411	#define MAX_SWAPFILES_CHECK() BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > __SWP_TYPE_BITS)
	412
	413	/*
	414	* Encode and decode a file entry:
3676f9ef CM	415	* bits 0-1: present (must be zero)
	416	* bit 2: PTE_FILE
	417	* bits 3-57: file offset / PAGE_SIZE
4f04d8f0 CM	418	*/
4f04d8f0 CM	419	#define pte_file(pte) (pte_val(pte) & PTE_FILE)
3676f9ef CM	420	#define pte_to_pgoff(x) (pte_val(x) >> 3)
3676f9ef CM	421	#define pgoff_to_pte(x) __pte(((x) << 3) \| PTE_FILE)
4f04d8f0	422
3676f9ef	423	#define PTE_FILE_MAX_BITS 55
4f04d8f0 CM	424
	425	extern int kern_addr_valid(unsigned long addr);
	426
	427	#include <asm-generic/pgtable.h>
	428
4f04d8f0 CM	429	#define pgtable_cache_init() do { } while (0)
	430
	431	#endif /* !__ASSEMBLY__ */
	432
	433	#endif /* __ASM_PGTABLE_H */