[deliverable/linux.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)
				/* bit 57 for PMD_SECT_SPLITTING */
#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_64K_PAGES
#define pmd_ERROR(pmd)		__pmd_error(__FILE__, __LINE__, pmd_val(pmd))
#endif
#define pgd_ERROR(pgd)		__pgd_error(__FILE__, __LINE__, pgd_val(pgd))

/*
 * The pgprot_* and protection_map entries will be fixed up at runtime to
 * include the cachable and bufferable bits based on memory policy, as well as
 * any architecture dependent bits like global/ASID and SMP shared mapping
 * bits.
 */
#define _PAGE_DEFAULT		PTE_TYPE_PAGE | PTE_AF

extern pgprot_t pgprot_default;

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

#define _MOD_PROT(p, b)		__pgprot_modify(p, 0, b)

#define PAGE_NONE		__pgprot_modify(pgprot_default, PTE_TYPE_MASK, PTE_PROT_NONE | PTE_RDONLY | PTE_PXN | PTE_UXN)
#define PAGE_SHARED		_MOD_PROT(pgprot_default, PTE_USER | PTE_NG | PTE_PXN | PTE_UXN)
#define PAGE_SHARED_EXEC	_MOD_PROT(pgprot_default, PTE_USER | PTE_NG | PTE_PXN)
#define PAGE_COPY		_MOD_PROT(pgprot_default, PTE_USER | PTE_NG | PTE_PXN | PTE_UXN | PTE_RDONLY)
#define PAGE_COPY_EXEC		_MOD_PROT(pgprot_default, PTE_USER | PTE_NG | PTE_PXN | PTE_RDONLY)
#define PAGE_READONLY		_MOD_PROT(pgprot_default, PTE_USER | PTE_NG | PTE_PXN | PTE_UXN | PTE_RDONLY)
#define PAGE_READONLY_EXEC	_MOD_PROT(pgprot_default, PTE_USER | PTE_NG | PTE_PXN | PTE_RDONLY)
#define PAGE_KERNEL		_MOD_PROT(pgprot_default, PTE_PXN | PTE_UXN | PTE_DIRTY)
#define PAGE_KERNEL_EXEC	_MOD_PROT(pgprot_default, PTE_UXN | PTE_DIRTY)

#define PAGE_HYP		_MOD_PROT(pgprot_default, PTE_HYP)
#define PAGE_HYP_DEVICE		__pgprot(PROT_DEVICE_nGnRE | PTE_HYP)

#define PAGE_S2			__pgprot_modify(pgprot_default, PTE_S2_MEMATTR_MASK, 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_RDONLY | PTE_PXN | PTE_UXN)
#define __PAGE_SHARED		__pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN | PTE_UXN)
#define __PAGE_SHARED_EXEC	__pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN)
#define __PAGE_COPY		__pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN | PTE_UXN | PTE_RDONLY)
#define __PAGE_COPY_EXEC	__pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN | PTE_RDONLY)
#define __PAGE_READONLY		__pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN | PTE_UXN | PTE_RDONLY)
#define __PAGE_READONLY_EXEC	__pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN | PTE_RDONLY)

#endif /* __ASSEMBLY__ */

#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

#ifndef __ASSEMBLY__
/*
 * 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_RDONLY))
#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))

#define PTE_BIT_FUNC(fn,op) \
static inline pte_t pte_##fn(pte_t pte) { pte_val(pte) op; return pte; }

PTE_BIT_FUNC(wrprotect, |= PTE_RDONLY);
PTE_BIT_FUNC(mkwrite,   &= ~PTE_RDONLY);
PTE_BIT_FUNC(mkclean,   &= ~PTE_DIRTY);
PTE_BIT_FUNC(mkdirty,   |= PTE_DIRTY);
PTE_BIT_FUNC(mkold,     &= ~PTE_AF);
PTE_BIT_FUNC(mkyoung,   |= PTE_AF);
PTE_BIT_FUNC(mkspecial, |= PTE_SPECIAL);

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_exec(pte))
			__sync_icache_dcache(pte, addr);
		if (!pte_dirty(pte))
			pte = pte_wrprotect(pte);
	}

	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

/*
 * Software PMD bits for THP
 */

#define PMD_SECT_DIRTY		(_AT(pmdval_t, 1) << 55)
#define PMD_SECT_SPLITTING	(_AT(pmdval_t, 1) << 57)

/*
 * THP definitions.
 */
#define pmd_young(pmd)		(pmd_val(pmd) & PMD_SECT_AF)

#define __HAVE_ARCH_PMD_WRITE
#define pmd_write(pmd)		(!(pmd_val(pmd) & PMD_SECT_RDONLY))

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

#define PMD_BIT_FUNC(fn,op) \
static inline pmd_t pmd_##fn(pmd_t pmd) { pmd_val(pmd) op; return pmd; }

PMD_BIT_FUNC(wrprotect,	|= PMD_SECT_RDONLY);
PMD_BIT_FUNC(mkold,	&= ~PMD_SECT_AF);
PMD_BIT_FUNC(mksplitting, |= PMD_SECT_SPLITTING);
PMD_BIT_FUNC(mkwrite,   &= ~PMD_SECT_RDONLY);
PMD_BIT_FUNC(mkdirty,   |= PMD_SECT_DIRTY);
PMD_BIT_FUNC(mkyoung,   |= PMD_SECT_AF);
PMD_BIT_FUNC(mknotpresent, &= ~PMD_TYPE_MASK);

#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))

static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
{
	const pmdval_t mask = PMD_SECT_USER | PMD_SECT_PXN | PMD_SECT_UXN |
			      PMD_SECT_RDONLY | PMD_SECT_PROT_NONE |
			      PMD_SECT_VALID;
	pmd_val(pmd) = (pmd_val(pmd) & ~mask) | (pgprot_val(newprot) & mask);
	return pmd;
}

#define set_pmd_at(mm, addr, pmdp, pmd)	set_pmd(pmdp, pmd)

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

/*
 * Mark the prot value as uncacheable and unbufferable.
 */
#define pgprot_noncached(prot) \
	__pgprot_modify(prot, PTE_ATTRINDX_MASK, PTE_ATTRINDX(MT_DEVICE_nGnRnE))
#define pgprot_writecombine(prot) \
	__pgprot_modify(prot, PTE_ATTRINDX_MASK, PTE_ATTRINDX(MT_NORMAL_NC))
#define pgprot_dmacoherent(prot) \
	__pgprot_modify(prot, PTE_ATTRINDX_MASK, PTE_ATTRINDX(MT_NORMAL_NC))
#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)


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

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_64K_PAGES

#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();
}

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_64K_PAGES */

/* 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_64K_PAGES
#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_val(pte) = (pte_val(pte) & ~mask) | (pgprot_val(newprot) & mask);
	return pte;
}

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

#define SWAPPER_DIR_SIZE	(3 * PAGE_SIZE)
#define IDMAP_DIR_SIZE		(2 * PAGE_SIZE)

/*
 * 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
 * the 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)
3676f9ef CM	31	/* bit 57 for PMD_SECT_SPLITTING */
3676f9ef CM	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))
	50	#ifndef CONFIG_ARM64_64K_PAGES
	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
	55	/*
	56	* The pgprot_* and protection_map entries will be fixed up at runtime to
	57	* include the cachable and bufferable bits based on memory policy, as well as
	58	* any architecture dependent bits like global/ASID and SMP shared mapping
	59	* bits.
	60	*/
	61	#define _PAGE_DEFAULT PTE_TYPE_PAGE \| PTE_AF
	62
	63	extern pgprot_t pgprot_default;
	64
a6fadf7e WD	65	#define __pgprot_modify(prot,mask,bits) \
	66	__pgprot((pgprot_val(prot) & ~(mask)) \| (bits))
	67
	68	#define _MOD_PROT(p, b) __pgprot_modify(p, 0, b)
4f04d8f0	69
072b1b62	70	#define PAGE_NONE __pgprot_modify(pgprot_default, PTE_TYPE_MASK, PTE_PROT_NONE \| PTE_RDONLY \| PTE_PXN \| PTE_UXN)
8e620b04 CM	71	#define PAGE_SHARED _MOD_PROT(pgprot_default, PTE_USER \| PTE_NG \| PTE_PXN \| PTE_UXN)
	72	#define PAGE_SHARED_EXEC _MOD_PROT(pgprot_default, PTE_USER \| PTE_NG \| PTE_PXN)
	73	#define PAGE_COPY _MOD_PROT(pgprot_default, PTE_USER \| PTE_NG \| PTE_PXN \| PTE_UXN \| PTE_RDONLY)
	74	#define PAGE_COPY_EXEC _MOD_PROT(pgprot_default, PTE_USER \| PTE_NG \| PTE_PXN \| PTE_RDONLY)
	75	#define PAGE_READONLY _MOD_PROT(pgprot_default, PTE_USER \| PTE_NG \| PTE_PXN \| PTE_UXN \| PTE_RDONLY)
	76	#define PAGE_READONLY_EXEC _MOD_PROT(pgprot_default, PTE_USER \| PTE_NG \| PTE_PXN \| PTE_RDONLY)
	77	#define PAGE_KERNEL _MOD_PROT(pgprot_default, PTE_PXN \| PTE_UXN \| PTE_DIRTY)
	78	#define PAGE_KERNEL_EXEC _MOD_PROT(pgprot_default, PTE_UXN \| PTE_DIRTY)
	79
36311607 MZ	80	#define PAGE_HYP _MOD_PROT(pgprot_default, PTE_HYP)
	81	#define PAGE_HYP_DEVICE __pgprot(PROT_DEVICE_nGnRE \| PTE_HYP)
	82
	83	#define PAGE_S2 __pgprot_modify(pgprot_default, PTE_S2_MEMATTR_MASK, PTE_S2_MEMATTR(MT_S2_NORMAL) \| PTE_S2_RDONLY)
	84	#define PAGE_S2_DEVICE __pgprot(PROT_DEFAULT \| PTE_S2_MEMATTR(MT_S2_DEVICE_nGnRE) \| PTE_S2_RDWR \| PTE_UXN)
	85
072b1b62	86	#define __PAGE_NONE __pgprot(((_PAGE_DEFAULT) & ~PTE_TYPE_MASK) \| PTE_PROT_NONE \| PTE_RDONLY \| PTE_PXN \| PTE_UXN)
8e620b04 CM	87	#define __PAGE_SHARED __pgprot(_PAGE_DEFAULT \| PTE_USER \| PTE_NG \| PTE_PXN \| PTE_UXN)
	88	#define __PAGE_SHARED_EXEC __pgprot(_PAGE_DEFAULT \| PTE_USER \| PTE_NG \| PTE_PXN)
	89	#define __PAGE_COPY __pgprot(_PAGE_DEFAULT \| PTE_USER \| PTE_NG \| PTE_PXN \| PTE_UXN \| PTE_RDONLY)
	90	#define __PAGE_COPY_EXEC __pgprot(_PAGE_DEFAULT \| PTE_USER \| PTE_NG \| PTE_PXN \| PTE_RDONLY)
	91	#define __PAGE_READONLY __pgprot(_PAGE_DEFAULT \| PTE_USER \| PTE_NG \| PTE_PXN \| PTE_UXN \| PTE_RDONLY)
	92	#define __PAGE_READONLY_EXEC __pgprot(_PAGE_DEFAULT \| PTE_USER \| PTE_NG \| PTE_PXN \| PTE_RDONLY)
4f04d8f0 CM	93
	94	#endif /* __ASSEMBLY__ */
	95
	96	#define __P000 __PAGE_NONE
	97	#define __P001 __PAGE_READONLY
	98	#define __P010 __PAGE_COPY
	99	#define __P011 __PAGE_COPY
	100	#define __P100 __PAGE_READONLY_EXEC
	101	#define __P101 __PAGE_READONLY_EXEC
	102	#define __P110 __PAGE_COPY_EXEC
	103	#define __P111 __PAGE_COPY_EXEC
	104
	105	#define __S000 __PAGE_NONE
	106	#define __S001 __PAGE_READONLY
	107	#define __S010 __PAGE_SHARED
	108	#define __S011 __PAGE_SHARED
	109	#define __S100 __PAGE_READONLY_EXEC
	110	#define __S101 __PAGE_READONLY_EXEC
	111	#define __S110 __PAGE_SHARED_EXEC
	112	#define __S111 __PAGE_SHARED_EXEC
	113
	114	#ifndef __ASSEMBLY__
	115	/*
	116	* ZERO_PAGE is a global shared page that is always zero: used
	117	* for zero-mapped memory areas etc..
	118	*/
	119	extern struct page *empty_zero_page;
	120	#define ZERO_PAGE(vaddr) (empty_zero_page)
	121
	122	#define pte_pfn(pte) ((pte_val(pte) & PHYS_MASK) >> PAGE_SHIFT)
	123
	124	#define pfn_pte(pfn,prot) (__pte(((phys_addr_t)(pfn) << PAGE_SHIFT) \| pgprot_val(prot)))
	125
	126	#define pte_none(pte) (!pte_val(pte))
	127	#define pte_clear(mm,addr,ptep) set_pte(ptep, __pte(0))
	128	#define pte_page(pte) (pfn_to_page(pte_pfn(pte)))
9ab6d02f	129	#define pte_offset_kernel(dir,addr) (pmd_page_vaddr(*(dir)) + pte_index(addr))
4f04d8f0 CM	130
	131	#define pte_offset_map(dir,addr) pte_offset_kernel((dir), (addr))
	132	#define pte_offset_map_nested(dir,addr) pte_offset_kernel((dir), (addr))
	133	#define pte_unmap(pte) do { } while (0)
	134	#define pte_unmap_nested(pte) do { } while (0)
	135
	136	/*
	137	* The following only work if pte_present(). Undefined behaviour otherwise.
	138	*/
a6fadf7e	139	#define pte_present(pte) (pte_val(pte) & (PTE_VALID \| PTE_PROT_NONE))
4f04d8f0 CM	140	#define pte_dirty(pte) (pte_val(pte) & PTE_DIRTY)
	141	#define pte_young(pte) (pte_val(pte) & PTE_AF)
	142	#define pte_special(pte) (pte_val(pte) & PTE_SPECIAL)
	143	#define pte_write(pte) (!(pte_val(pte) & PTE_RDONLY))
8e620b04	144	#define pte_exec(pte) (!(pte_val(pte) & PTE_UXN))
4f04d8f0	145
a6fadf7e	146	#define pte_valid_user(pte) \
02522463	147	((pte_val(pte) & (PTE_VALID \| PTE_USER)) == (PTE_VALID \| PTE_USER))
4f04d8f0 CM	148
	149	#define PTE_BIT_FUNC(fn,op) \
	150	static inline pte_t pte_##fn(pte_t pte) { pte_val(pte) op; return pte; }
	151
	152	PTE_BIT_FUNC(wrprotect, \|= PTE_RDONLY);
	153	PTE_BIT_FUNC(mkwrite, &= ~PTE_RDONLY);
	154	PTE_BIT_FUNC(mkclean, &= ~PTE_DIRTY);
	155	PTE_BIT_FUNC(mkdirty, \|= PTE_DIRTY);
	156	PTE_BIT_FUNC(mkold, &= ~PTE_AF);
	157	PTE_BIT_FUNC(mkyoung, \|= PTE_AF);
	158	PTE_BIT_FUNC(mkspecial, \|= PTE_SPECIAL);
	159
	160	static inline void set_pte(pte_t *ptep, pte_t pte)
	161	{
	162	*ptep = pte;
	163	}
	164
	165	extern void __sync_icache_dcache(pte_t pteval, unsigned long addr);
	166
	167	static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
	168	pte_t *ptep, pte_t pte)
	169	{
a6fadf7e	170	if (pte_valid_user(pte)) {
02522463 WD	171	if (pte_exec(pte))
	172	__sync_icache_dcache(pte, addr);
	173	if (!pte_dirty(pte))
	174	pte = pte_wrprotect(pte);
	175	}
	176
4f04d8f0 CM	177	set_pte(ptep, pte);
	178	}
	179
	180	/*
	181	* Huge pte definitions.
	182	*/
084bd298 SC	183	#define pte_huge(pte) (!(pte_val(pte) & PTE_TABLE_BIT))
	184	#define pte_mkhuge(pte) (__pte(pte_val(pte) & ~PTE_TABLE_BIT))
	185
	186	/*
	187	* Hugetlb definitions.
	188	*/
	189	#define HUGE_MAX_HSTATE 2
	190	#define HPAGE_SHIFT PMD_SHIFT
	191	#define HPAGE_SIZE (_AC(1, UL) << HPAGE_SHIFT)
	192	#define HPAGE_MASK (~(HPAGE_SIZE - 1))
	193	#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
4f04d8f0	194
4f04d8f0 CM	195	#define __HAVE_ARCH_PTE_SPECIAL
4f04d8f0 CM	196
af074848 SC	197	/*
	198	* Software PMD bits for THP
	199	*/
	200
	201	#define PMD_SECT_DIRTY (_AT(pmdval_t, 1) << 55)
	202	#define PMD_SECT_SPLITTING (_AT(pmdval_t, 1) << 57)
	203
	204	/*
	205	* THP definitions.
	206	*/
	207	#define pmd_young(pmd) (pmd_val(pmd) & PMD_SECT_AF)
	208
	209	#define __HAVE_ARCH_PMD_WRITE
	210	#define pmd_write(pmd) (!(pmd_val(pmd) & PMD_SECT_RDONLY))
	211
	212	#ifdef CONFIG_TRANSPARENT_HUGEPAGE
	213	#define pmd_trans_huge(pmd) (pmd_val(pmd) && !(pmd_val(pmd) & PMD_TABLE_BIT))
	214	#define pmd_trans_splitting(pmd) (pmd_val(pmd) & PMD_SECT_SPLITTING)
	215	#endif
	216
	217	#define PMD_BIT_FUNC(fn,op) \
	218	static inline pmd_t pmd_##fn(pmd_t pmd) { pmd_val(pmd) op; return pmd; }
	219
	220	PMD_BIT_FUNC(wrprotect, \|= PMD_SECT_RDONLY);
	221	PMD_BIT_FUNC(mkold, &= ~PMD_SECT_AF);
	222	PMD_BIT_FUNC(mksplitting, \|= PMD_SECT_SPLITTING);
	223	PMD_BIT_FUNC(mkwrite, &= ~PMD_SECT_RDONLY);
	224	PMD_BIT_FUNC(mkdirty, \|= PMD_SECT_DIRTY);
	225	PMD_BIT_FUNC(mkyoung, \|= PMD_SECT_AF);
	226	PMD_BIT_FUNC(mknotpresent, &= ~PMD_TYPE_MASK);
	227
	228	#define pmd_mkhuge(pmd) (__pmd(pmd_val(pmd) & ~PMD_TABLE_BIT))
	229
	230	#define pmd_pfn(pmd) (((pmd_val(pmd) & PMD_MASK) & PHYS_MASK) >> PAGE_SHIFT)
	231	#define pfn_pmd(pfn,prot) (__pmd(((phys_addr_t)(pfn) << PAGE_SHIFT) \| pgprot_val(prot)))
	232	#define mk_pmd(page,prot) pfn_pmd(page_to_pfn(page),prot)
	233
	234	#define pmd_page(pmd) pfn_to_page(__phys_to_pfn(pmd_val(pmd) & PHYS_MASK))
	235
	236	static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
	237	{
	238	const pmdval_t mask = PMD_SECT_USER \| PMD_SECT_PXN \| PMD_SECT_UXN \|
	239	PMD_SECT_RDONLY \| PMD_SECT_PROT_NONE \|
	240	PMD_SECT_VALID;
	241	pmd_val(pmd) = (pmd_val(pmd) & ~mask) \| (pgprot_val(newprot) & mask);
	242	return pmd;
	243	}
	244
	245	#define set_pmd_at(mm, addr, pmdp, pmd) set_pmd(pmdp, pmd)
	246
	247	static inline int has_transparent_hugepage(void)
	248	{
	249	return 1;
	250	}
	251
4f04d8f0 CM	252	/*
	253	* Mark the prot value as uncacheable and unbufferable.
	254	*/
	255	#define pgprot_noncached(prot) \
	256	__pgprot_modify(prot, PTE_ATTRINDX_MASK, PTE_ATTRINDX(MT_DEVICE_nGnRnE))
	257	#define pgprot_writecombine(prot) \
4f00130b	258	__pgprot_modify(prot, PTE_ATTRINDX_MASK, PTE_ATTRINDX(MT_NORMAL_NC))
4f04d8f0 CM	259	#define pgprot_dmacoherent(prot) \
	260	__pgprot_modify(prot, PTE_ATTRINDX_MASK, PTE_ATTRINDX(MT_NORMAL_NC))
	261	#define __HAVE_PHYS_MEM_ACCESS_PROT
	262	struct file;
	263	extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
	264	unsigned long size, pgprot_t vma_prot);
	265
	266	#define pmd_none(pmd) (!pmd_val(pmd))
	267	#define pmd_present(pmd) (pmd_val(pmd))
	268
	269	#define pmd_bad(pmd) (!(pmd_val(pmd) & 2))
	270
36311607 MZ	271	#define pmd_table(pmd) ((pmd_val(pmd) & PMD_TYPE_MASK) == \
	272	PMD_TYPE_TABLE)
	273	#define pmd_sect(pmd) ((pmd_val(pmd) & PMD_TYPE_MASK) == \
	274	PMD_TYPE_SECT)
	275
	276
4f04d8f0 CM	277	static inline void set_pmd(pmd_t *pmdp, pmd_t pmd)
	278	{
	279	*pmdp = pmd;
	280	dsb();
	281	}
	282
	283	static inline void pmd_clear(pmd_t *pmdp)
	284	{
	285	set_pmd(pmdp, __pmd(0));
	286	}
	287
	288	static inline pte_t *pmd_page_vaddr(pmd_t pmd)
	289	{
	290	return __va(pmd_val(pmd) & PHYS_MASK & (s32)PAGE_MASK);
	291	}
	292
	293	#define pmd_page(pmd) pfn_to_page(__phys_to_pfn(pmd_val(pmd) & PHYS_MASK))
	294
	295	/*
	296	* Conversion functions: convert a page and protection to a page entry,
	297	* and a page entry and page directory to the page they refer to.
	298	*/
	299	#define mk_pte(page,prot) pfn_pte(page_to_pfn(page),prot)
	300
	301	#ifndef CONFIG_ARM64_64K_PAGES
	302
	303	#define pud_none(pud) (!pud_val(pud))
	304	#define pud_bad(pud) (!(pud_val(pud) & 2))
	305	#define pud_present(pud) (pud_val(pud))
	306
	307	static inline void set_pud(pud_t *pudp, pud_t pud)
	308	{
	309	*pudp = pud;
	310	dsb();
	311	}
	312
	313	static inline void pud_clear(pud_t *pudp)
	314	{
	315	set_pud(pudp, __pud(0));
	316	}
	317
	318	static inline pmd_t *pud_page_vaddr(pud_t pud)
	319	{
	320	return __va(pud_val(pud) & PHYS_MASK & (s32)PAGE_MASK);
	321	}
	322
	323	#endif /* CONFIG_ARM64_64K_PAGES */
	324
	325	/* to find an entry in a page-table-directory */
	326	#define pgd_index(addr) (((addr) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
	327
	328	#define pgd_offset(mm, addr) ((mm)->pgd+pgd_index(addr))
	329
	330	/* to find an entry in a kernel page-table-directory */
	331	#define pgd_offset_k(addr) pgd_offset(&init_mm, addr)
	332
	333	/* Find an entry in the second-level page table.. */
	334	#ifndef CONFIG_ARM64_64K_PAGES
	335	#define pmd_index(addr) (((addr) >> PMD_SHIFT) & (PTRS_PER_PMD - 1))
	336	static inline pmd_t pmd_offset(pud_t pud, unsigned long addr)
	337	{
	338	return (pmd_t )pud_page_vaddr(pud) + pmd_index(addr);
	339	}
	340	#endif
341
342	/* Find an entry in the third-level page table.. */
9ab6d02f	343	#define pte_index(addr) (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
4f04d8f0 CM	344
	345	static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
	346	{
a6fadf7e WD	347	const pteval_t mask = PTE_USER \| PTE_PXN \| PTE_UXN \| PTE_RDONLY \|
a6fadf7e WD	348	PTE_PROT_NONE \| PTE_VALID;
4f04d8f0 CM	349	pte_val(pte) = (pte_val(pte) & ~mask) \| (pgprot_val(newprot) & mask);
	350	return pte;
	351	}
	352
	353	extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
	354	extern pgd_t idmap_pg_dir[PTRS_PER_PGD];
	355
	356	#define SWAPPER_DIR_SIZE (3 * PAGE_SIZE)
	357	#define IDMAP_DIR_SIZE (2 * PAGE_SIZE)
	358
	359	/*
	360	* Encode and decode a swap entry:
3676f9ef CM	361	* bits 0-1: present (must be zero)
	362	* bit 2: PTE_FILE
	363	* bits 3-8: swap type
	364	* bits 9-57: swap offset
4f04d8f0	365	*/
3676f9ef	366	#define __SWP_TYPE_SHIFT 3
4f04d8f0	367	#define __SWP_TYPE_BITS 6
3676f9ef	368	#define __SWP_OFFSET_BITS 49
4f04d8f0 CM	369	#define __SWP_TYPE_MASK ((1 << __SWP_TYPE_BITS) - 1)
4f04d8f0 CM	370	#define __SWP_OFFSET_SHIFT (__SWP_TYPE_BITS + __SWP_TYPE_SHIFT)
3676f9ef	371	#define __SWP_OFFSET_MASK ((1UL << __SWP_OFFSET_BITS) - 1)
4f04d8f0 CM	372
4f04d8f0 CM	373	#define __swp_type(x) (((x).val >> __SWP_TYPE_SHIFT) & __SWP_TYPE_MASK)
3676f9ef	374	#define __swp_offset(x) (((x).val >> __SWP_OFFSET_SHIFT) & __SWP_OFFSET_MASK)
4f04d8f0 CM	375	#define __swp_entry(type,offset) ((swp_entry_t) { ((type) << __SWP_TYPE_SHIFT) \| ((offset) << __SWP_OFFSET_SHIFT) })
	376
	377	#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
	378	#define __swp_entry_to_pte(swp) ((pte_t) { (swp).val })
	379
	380	/*
	381	* Ensure that there are not more swap files than can be encoded in the kernel
	382	* the PTEs.
	383	*/
	384	#define MAX_SWAPFILES_CHECK() BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > __SWP_TYPE_BITS)
	385
	386	/*
	387	* Encode and decode a file entry:
3676f9ef CM	388	* bits 0-1: present (must be zero)
	389	* bit 2: PTE_FILE
	390	* bits 3-57: file offset / PAGE_SIZE
4f04d8f0 CM	391	*/
4f04d8f0 CM	392	#define pte_file(pte) (pte_val(pte) & PTE_FILE)
3676f9ef CM	393	#define pte_to_pgoff(x) (pte_val(x) >> 3)
3676f9ef CM	394	#define pgoff_to_pte(x) __pte(((x) << 3) \| PTE_FILE)
4f04d8f0	395
3676f9ef	396	#define PTE_FILE_MAX_BITS 55
4f04d8f0 CM	397
	398	extern int kern_addr_valid(unsigned long addr);
	399
	400	#include <asm-generic/pgtable.h>
	401
4f04d8f0 CM	402	#define pgtable_cache_init() do { } while (0)
	403
	404	#endif /* !__ASSEMBLY__ */
	405
	406	#endif /* __ASM_PGTABLE_H */