[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)
#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)
#ifndef CONFIG_ARM64_4_LEVELS
#define VMALLOC_END		(PAGE_OFFSET - UL(0x400000000) - SZ_64K)
#else
#define VMALLOC_END		(PAGE_OFFSET - UL(0x40000000000) - SZ_64K)
#endif

#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 __pud_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
#ifdef CONFIG_ARM64_4_LEVELS
#define pud_ERROR(pud)		__pud_error(__FILE__, __LINE__, pud_val(pud))
#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 */

#ifdef CONFIG_ARM64_4_LEVELS

#define pgd_none(pgd)		(!pgd_val(pgd))
#define pgd_bad(pgd)		(!(pgd_val(pgd) & 2))
#define pgd_present(pgd)	(pgd_val(pgd))

static inline void set_pgd(pgd_t *pgdp, pgd_t pgd)
{
	*pgdp = pgd;
	dsb(ishst);
}

static inline void pgd_clear(pgd_t *pgdp)
{
	set_pgd(pgdp, __pgd(0));
}

static inline pud_t *pgd_page_vaddr(pgd_t pgd)
{
	return __va(pgd_val(pgd) & PHYS_MASK & (s32)PAGE_MASK);
}

#endif  /* CONFIG_ARM64_4_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)

#ifdef CONFIG_ARM64_4_LEVELS
#define pud_index(addr)		(((addr) >> PUD_SHIFT) & (PTRS_PER_PUD - 1))
static inline pud_t *pud_offset(pgd_t *pgd, unsigned long addr)
{
	return (pud_t *)pgd_page_vaddr(*pgd) + pud_index(addr);
}
#endif

/* 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)
c79b954b	38	#ifndef CONFIG_ARM64_4_LEVELS
4f04d8f0	39	#define VMALLOC_END (PAGE_OFFSET - UL(0x400000000) - SZ_64K)
c79b954b JL	40	#else
	41	#define VMALLOC_END (PAGE_OFFSET - UL(0x40000000000) - SZ_64K)
	42	#endif
4f04d8f0 CM	43
	44	#define vmemmap ((struct page *)(VMALLOC_END + SZ_64K))
	45
	46	#define FIRST_USER_ADDRESS 0
	47
	48	#ifndef __ASSEMBLY__
	49	extern void __pte_error(const char *file, int line, unsigned long val);
	50	extern void __pmd_error(const char *file, int line, unsigned long val);
c79b954b	51	extern void __pud_error(const char *file, int line, unsigned long val);
4f04d8f0 CM	52	extern void __pgd_error(const char *file, int line, unsigned long val);
	53
	54	#define pte_ERROR(pte) __pte_error(__FILE__, __LINE__, pte_val(pte))
e41ceed0	55	#ifndef CONFIG_ARM64_2_LEVELS
4f04d8f0 CM	56	#define pmd_ERROR(pmd) __pmd_error(__FILE__, __LINE__, pmd_val(pmd))
4f04d8f0 CM	57	#endif
c79b954b JL	58	#ifdef CONFIG_ARM64_4_LEVELS
	59	#define pud_ERROR(pud) __pud_error(__FILE__, __LINE__, pud_val(pud))
	60	#endif
4f04d8f0 CM	61	#define pgd_ERROR(pgd) __pgd_error(__FILE__, __LINE__, pgd_val(pgd))
4f04d8f0 CM	62
a501e324 CM	63	#ifdef CONFIG_SMP
	64	#define PROT_DEFAULT (PTE_TYPE_PAGE \| PTE_AF \| PTE_SHARED)
	65	#define PROT_SECT_DEFAULT (PMD_TYPE_SECT \| PMD_SECT_AF \| PMD_SECT_S)
	66	#else
	67	#define PROT_DEFAULT (PTE_TYPE_PAGE \| PTE_AF)
	68	#define PROT_SECT_DEFAULT (PMD_TYPE_SECT \| PMD_SECT_AF)
	69	#endif
4f04d8f0	70
a501e324 CM	71	#define PROT_DEVICE_nGnRE (PROT_DEFAULT \| PTE_PXN \| PTE_UXN \| PTE_ATTRINDX(MT_DEVICE_nGnRE))
	72	#define PROT_NORMAL_NC (PROT_DEFAULT \| PTE_PXN \| PTE_UXN \| PTE_ATTRINDX(MT_NORMAL_NC))
	73	#define PROT_NORMAL (PROT_DEFAULT \| PTE_PXN \| PTE_UXN \| PTE_ATTRINDX(MT_NORMAL))
4f04d8f0	74
a501e324 CM	75	#define PROT_SECT_DEVICE_nGnRE (PROT_SECT_DEFAULT \| PMD_SECT_PXN \| PMD_SECT_UXN \| PMD_ATTRINDX(MT_DEVICE_nGnRE))
	76	#define PROT_SECT_NORMAL (PROT_SECT_DEFAULT \| PMD_SECT_PXN \| PMD_SECT_UXN \| PMD_ATTRINDX(MT_NORMAL))
	77	#define PROT_SECT_NORMAL_EXEC (PROT_SECT_DEFAULT \| PMD_SECT_UXN \| PMD_ATTRINDX(MT_NORMAL))
a6fadf7e	78
a501e324	79	#define _PAGE_DEFAULT (PROT_DEFAULT \| PTE_ATTRINDX(MT_NORMAL))
4f04d8f0	80
a501e324 CM	81	#define PAGE_KERNEL __pgprot(_PAGE_DEFAULT \| PTE_PXN \| PTE_UXN \| PTE_DIRTY \| PTE_WRITE)
a501e324 CM	82	#define PAGE_KERNEL_EXEC __pgprot(_PAGE_DEFAULT \| PTE_UXN \| PTE_DIRTY \| PTE_WRITE)
8e620b04	83
a501e324	84	#define PAGE_HYP __pgprot(_PAGE_DEFAULT \| PTE_HYP)
36311607 MZ	85	#define PAGE_HYP_DEVICE __pgprot(PROT_DEVICE_nGnRE \| PTE_HYP)
36311607 MZ	86
a501e324	87	#define PAGE_S2 __pgprot(PROT_DEFAULT \| PTE_S2_MEMATTR(MT_S2_NORMAL) \| PTE_S2_RDONLY)
36311607 MZ	88	#define PAGE_S2_DEVICE __pgprot(PROT_DEFAULT \| PTE_S2_MEMATTR(MT_S2_DEVICE_nGnRE) \| PTE_S2_RDWR \| PTE_UXN)
36311607 MZ	89
a501e324 CM	90	#define PAGE_NONE __pgprot(((_PAGE_DEFAULT) & ~PTE_TYPE_MASK) \| PTE_PROT_NONE \| PTE_PXN \| PTE_UXN)
	91	#define PAGE_SHARED __pgprot(_PAGE_DEFAULT \| PTE_USER \| PTE_NG \| PTE_PXN \| PTE_UXN \| PTE_WRITE)
	92	#define PAGE_SHARED_EXEC __pgprot(_PAGE_DEFAULT \| PTE_USER \| PTE_NG \| PTE_PXN \| PTE_WRITE)
	93	#define PAGE_COPY __pgprot(_PAGE_DEFAULT \| PTE_USER \| PTE_NG \| PTE_PXN \| PTE_UXN)
	94	#define PAGE_COPY_EXEC __pgprot(_PAGE_DEFAULT \| PTE_USER \| PTE_NG \| PTE_PXN)
	95	#define PAGE_READONLY __pgprot(_PAGE_DEFAULT \| PTE_USER \| PTE_NG \| PTE_PXN \| PTE_UXN)
	96	#define PAGE_READONLY_EXEC __pgprot(_PAGE_DEFAULT \| PTE_USER \| PTE_NG \| PTE_PXN)
a501e324 CM	97
	98	#define __P000 PAGE_NONE
	99	#define __P001 PAGE_READONLY
	100	#define __P010 PAGE_COPY
	101	#define __P011 PAGE_COPY
5a0fdfad	102	#define __P100 PAGE_READONLY_EXEC
a501e324 CM	103	#define __P101 PAGE_READONLY_EXEC
	104	#define __P110 PAGE_COPY_EXEC
	105	#define __P111 PAGE_COPY_EXEC
	106
	107	#define __S000 PAGE_NONE
	108	#define __S001 PAGE_READONLY
	109	#define __S010 PAGE_SHARED
	110	#define __S011 PAGE_SHARED
5a0fdfad	111	#define __S100 PAGE_READONLY_EXEC
a501e324 CM	112	#define __S101 PAGE_READONLY_EXEC
	113	#define __S110 PAGE_SHARED_EXEC
	114	#define __S111 PAGE_SHARED_EXEC
4f04d8f0	115
4f04d8f0 CM	116	/*
	117	* ZERO_PAGE is a global shared page that is always zero: used
	118	* for zero-mapped memory areas etc..
	119	*/
	120	extern struct page *empty_zero_page;
	121	#define ZERO_PAGE(vaddr) (empty_zero_page)
	122
	123	#define pte_pfn(pte) ((pte_val(pte) & PHYS_MASK) >> PAGE_SHIFT)
	124
	125	#define pfn_pte(pfn,prot) (__pte(((phys_addr_t)(pfn) << PAGE_SHIFT) \| pgprot_val(prot)))
	126
	127	#define pte_none(pte) (!pte_val(pte))
	128	#define pte_clear(mm,addr,ptep) set_pte(ptep, __pte(0))
	129	#define pte_page(pte) (pfn_to_page(pte_pfn(pte)))
9ab6d02f	130	#define pte_offset_kernel(dir,addr) (pmd_page_vaddr(*(dir)) + pte_index(addr))
4f04d8f0 CM	131
	132	#define pte_offset_map(dir,addr) pte_offset_kernel((dir), (addr))
	133	#define pte_offset_map_nested(dir,addr) pte_offset_kernel((dir), (addr))
	134	#define pte_unmap(pte) do { } while (0)
	135	#define pte_unmap_nested(pte) do { } while (0)
	136
	137	/*
	138	* The following only work if pte_present(). Undefined behaviour otherwise.
	139	*/
84fe6826 SC	140	#define pte_present(pte) (!!(pte_val(pte) & (PTE_VALID \| PTE_PROT_NONE)))
	141	#define pte_dirty(pte) (!!(pte_val(pte) & PTE_DIRTY))
	142	#define pte_young(pte) (!!(pte_val(pte) & PTE_AF))
	143	#define pte_special(pte) (!!(pte_val(pte) & PTE_SPECIAL))
	144	#define pte_write(pte) (!!(pte_val(pte) & PTE_WRITE))
8e620b04	145	#define pte_exec(pte) (!(pte_val(pte) & PTE_UXN))
4f04d8f0	146
a6fadf7e	147	#define pte_valid_user(pte) \
02522463	148	((pte_val(pte) & (PTE_VALID \| PTE_USER)) == (PTE_VALID \| PTE_USER))
4f04d8f0	149
44b6dfc5 SC	150	static inline pte_t pte_wrprotect(pte_t pte)
44b6dfc5 SC	151	{
c2c93e5b	152	pte_val(pte) &= ~PTE_WRITE;
44b6dfc5 SC	153	return pte;
	154	}
	155
	156	static inline pte_t pte_mkwrite(pte_t pte)
	157	{
c2c93e5b	158	pte_val(pte) \|= PTE_WRITE;
44b6dfc5 SC	159	return pte;
	160	}
	161
	162	static inline pte_t pte_mkclean(pte_t pte)
	163	{
	164	pte_val(pte) &= ~PTE_DIRTY;
	165	return pte;
	166	}
	167
	168	static inline pte_t pte_mkdirty(pte_t pte)
	169	{
	170	pte_val(pte) \|= PTE_DIRTY;
	171	return pte;
	172	}
	173
	174	static inline pte_t pte_mkold(pte_t pte)
	175	{
	176	pte_val(pte) &= ~PTE_AF;
	177	return pte;
	178	}
	179
	180	static inline pte_t pte_mkyoung(pte_t pte)
	181	{
	182	pte_val(pte) \|= PTE_AF;
	183	return pte;
	184	}
	185
	186	static inline pte_t pte_mkspecial(pte_t pte)
	187	{
	188	pte_val(pte) \|= PTE_SPECIAL;
	189	return pte;
	190	}
4f04d8f0 CM	191
	192	static inline void set_pte(pte_t *ptep, pte_t pte)
	193	{
	194	*ptep = pte;
	195	}
	196
	197	extern void __sync_icache_dcache(pte_t pteval, unsigned long addr);
	198
	199	static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
	200	pte_t *ptep, pte_t pte)
	201	{
a6fadf7e	202	if (pte_valid_user(pte)) {
71fdb6bf	203	if (!pte_special(pte) && pte_exec(pte))
02522463	204	__sync_icache_dcache(pte, addr);
c2c93e5b SC	205	if (pte_dirty(pte) && pte_write(pte))
	206	pte_val(pte) &= ~PTE_RDONLY;
	207	else
	208	pte_val(pte) \|= PTE_RDONLY;
02522463 WD	209	}
02522463 WD	210
4f04d8f0 CM	211	set_pte(ptep, pte);
	212	}
	213
	214	/*
	215	* Huge pte definitions.
	216	*/
084bd298 SC	217	#define pte_huge(pte) (!(pte_val(pte) & PTE_TABLE_BIT))
	218	#define pte_mkhuge(pte) (__pte(pte_val(pte) & ~PTE_TABLE_BIT))
	219
	220	/*
	221	* Hugetlb definitions.
	222	*/
	223	#define HUGE_MAX_HSTATE 2
	224	#define HPAGE_SHIFT PMD_SHIFT
	225	#define HPAGE_SIZE (_AC(1, UL) << HPAGE_SHIFT)
	226	#define HPAGE_MASK (~(HPAGE_SIZE - 1))
	227	#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
4f04d8f0	228
4f04d8f0 CM	229	#define __HAVE_ARCH_PTE_SPECIAL
4f04d8f0 CM	230
9c7e535f SC	231	static inline pte_t pmd_pte(pmd_t pmd)
	232	{
	233	return __pte(pmd_val(pmd));
	234	}
af074848	235
9c7e535f SC	236	static inline pmd_t pte_pmd(pte_t pte)
	237	{
	238	return __pmd(pte_val(pte));
	239	}
af074848 SC	240
	241	/*
	242	* THP definitions.
	243	*/
af074848 SC	244
	245	#ifdef CONFIG_TRANSPARENT_HUGEPAGE
	246	#define pmd_trans_huge(pmd) (pmd_val(pmd) && !(pmd_val(pmd) & PMD_TABLE_BIT))
9c7e535f	247	#define pmd_trans_splitting(pmd) pte_special(pmd_pte(pmd))
af074848 SC	248	#endif
af074848 SC	249
9c7e535f SC	250	#define pmd_young(pmd) pte_young(pmd_pte(pmd))
	251	#define pmd_wrprotect(pmd) pte_pmd(pte_wrprotect(pmd_pte(pmd)))
	252	#define pmd_mksplitting(pmd) pte_pmd(pte_mkspecial(pmd_pte(pmd)))
	253	#define pmd_mkold(pmd) pte_pmd(pte_mkold(pmd_pte(pmd)))
	254	#define pmd_mkwrite(pmd) pte_pmd(pte_mkwrite(pmd_pte(pmd)))
	255	#define pmd_mkdirty(pmd) pte_pmd(pte_mkdirty(pmd_pte(pmd)))
	256	#define pmd_mkyoung(pmd) pte_pmd(pte_mkyoung(pmd_pte(pmd)))
e3a920af	257	#define pmd_mknotpresent(pmd) (__pmd(pmd_val(pmd) & ~PMD_TYPE_MASK))
af074848	258
9c7e535f SC	259	#define __HAVE_ARCH_PMD_WRITE
9c7e535f SC	260	#define pmd_write(pmd) pte_write(pmd_pte(pmd))
af074848 SC	261
	262	#define pmd_mkhuge(pmd) (__pmd(pmd_val(pmd) & ~PMD_TABLE_BIT))
	263
	264	#define pmd_pfn(pmd) (((pmd_val(pmd) & PMD_MASK) & PHYS_MASK) >> PAGE_SHIFT)
	265	#define pfn_pmd(pfn,prot) (__pmd(((phys_addr_t)(pfn) << PAGE_SHIFT) \| pgprot_val(prot)))
	266	#define mk_pmd(page,prot) pfn_pmd(page_to_pfn(page),prot)
	267
	268	#define pmd_page(pmd) pfn_to_page(__phys_to_pfn(pmd_val(pmd) & PHYS_MASK))
206a2a73	269	#define pud_pfn(pud) (((pud_val(pud) & PUD_MASK) & PHYS_MASK) >> PAGE_SHIFT)
af074848	270
ceb21835	271	#define set_pmd_at(mm, addr, pmdp, pmd) set_pte_at(mm, addr, (pte_t *)pmdp, pmd_pte(pmd))
af074848 SC	272
	273	static inline int has_transparent_hugepage(void)
	274	{
	275	return 1;
	276	}
	277
a501e324 CM	278	#define __pgprot_modify(prot,mask,bits) \
	279	__pgprot((pgprot_val(prot) & ~(mask)) \| (bits))
	280
4f04d8f0 CM	281	/*
	282	* Mark the prot value as uncacheable and unbufferable.
	283	*/
	284	#define pgprot_noncached(prot) \
de2db743	285	__pgprot_modify(prot, PTE_ATTRINDX_MASK, PTE_ATTRINDX(MT_DEVICE_nGnRnE) \| PTE_PXN \| PTE_UXN)
4f04d8f0	286	#define pgprot_writecombine(prot) \
de2db743	287	__pgprot_modify(prot, PTE_ATTRINDX_MASK, PTE_ATTRINDX(MT_NORMAL_NC) \| PTE_PXN \| PTE_UXN)
4f04d8f0 CM	288	#define __HAVE_PHYS_MEM_ACCESS_PROT
	289	struct file;
	290	extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
	291	unsigned long size, pgprot_t vma_prot);
	292
	293	#define pmd_none(pmd) (!pmd_val(pmd))
	294	#define pmd_present(pmd) (pmd_val(pmd))
	295
	296	#define pmd_bad(pmd) (!(pmd_val(pmd) & 2))
	297
36311607 MZ	298	#define pmd_table(pmd) ((pmd_val(pmd) & PMD_TYPE_MASK) == \
	299	PMD_TYPE_TABLE)
	300	#define pmd_sect(pmd) ((pmd_val(pmd) & PMD_TYPE_MASK) == \
	301	PMD_TYPE_SECT)
	302
f3b766a2	303	#ifdef CONFIG_ARM64_64K_PAGES
206a2a73 SC	304	#define pud_sect(pud) (0)
	305	#else
	306	#define pud_sect(pud) ((pud_val(pud) & PUD_TYPE_MASK) == \
	307	PUD_TYPE_SECT)
	308	#endif
36311607	309
4f04d8f0 CM	310	static inline void set_pmd(pmd_t *pmdp, pmd_t pmd)
	311	{
	312	*pmdp = pmd;
98f7685e	313	dsb(ishst);
4f04d8f0 CM	314	}
	315
	316	static inline void pmd_clear(pmd_t *pmdp)
	317	{
	318	set_pmd(pmdp, __pmd(0));
	319	}
	320
	321	static inline pte_t *pmd_page_vaddr(pmd_t pmd)
	322	{
	323	return __va(pmd_val(pmd) & PHYS_MASK & (s32)PAGE_MASK);
	324	}
	325
	326	#define pmd_page(pmd) pfn_to_page(__phys_to_pfn(pmd_val(pmd) & PHYS_MASK))
	327
	328	/*
	329	* Conversion functions: convert a page and protection to a page entry,
	330	* and a page entry and page directory to the page they refer to.
	331	*/
	332	#define mk_pte(page,prot) pfn_pte(page_to_pfn(page),prot)
	333
e41ceed0	334	#ifndef CONFIG_ARM64_2_LEVELS
4f04d8f0 CM	335
	336	#define pud_none(pud) (!pud_val(pud))
	337	#define pud_bad(pud) (!(pud_val(pud) & 2))
	338	#define pud_present(pud) (pud_val(pud))
	339
	340	static inline void set_pud(pud_t *pudp, pud_t pud)
	341	{
	342	*pudp = pud;
98f7685e	343	dsb(ishst);
4f04d8f0 CM	344	}
	345
	346	static inline void pud_clear(pud_t *pudp)
	347	{
	348	set_pud(pudp, __pud(0));
	349	}
	350
	351	static inline pmd_t *pud_page_vaddr(pud_t pud)
	352	{
	353	return __va(pud_val(pud) & PHYS_MASK & (s32)PAGE_MASK);
	354	}
	355
e41ceed0	356	#endif /* CONFIG_ARM64_2_LEVELS */
4f04d8f0	357
c79b954b JL	358	#ifdef CONFIG_ARM64_4_LEVELS
	359
	360	#define pgd_none(pgd) (!pgd_val(pgd))
	361	#define pgd_bad(pgd) (!(pgd_val(pgd) & 2))
	362	#define pgd_present(pgd) (pgd_val(pgd))
	363
	364	static inline void set_pgd(pgd_t *pgdp, pgd_t pgd)
	365	{
	366	*pgdp = pgd;
	367	dsb(ishst);
	368	}
	369
	370	static inline void pgd_clear(pgd_t *pgdp)
	371	{
	372	set_pgd(pgdp, __pgd(0));
	373	}
	374
	375	static inline pud_t *pgd_page_vaddr(pgd_t pgd)
	376	{
	377	return __va(pgd_val(pgd) & PHYS_MASK & (s32)PAGE_MASK);
	378	}
	379
	380	#endif /* CONFIG_ARM64_4_LEVELS */
	381
4f04d8f0 CM	382	/* to find an entry in a page-table-directory */
	383	#define pgd_index(addr) (((addr) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
	384
	385	#define pgd_offset(mm, addr) ((mm)->pgd+pgd_index(addr))
	386
	387	/* to find an entry in a kernel page-table-directory */
	388	#define pgd_offset_k(addr) pgd_offset(&init_mm, addr)
	389
c79b954b JL	390	#ifdef CONFIG_ARM64_4_LEVELS
	391	#define pud_index(addr) (((addr) >> PUD_SHIFT) & (PTRS_PER_PUD - 1))
	392	static inline pud_t pud_offset(pgd_t pgd, unsigned long addr)
	393	{
	394	return (pud_t )pgd_page_vaddr(pgd) + pud_index(addr);
	395	}
	396	#endif
	397
4f04d8f0	398	/* Find an entry in the second-level page table.. */
e41ceed0	399	#ifndef CONFIG_ARM64_2_LEVELS
4f04d8f0 CM	400	#define pmd_index(addr) (((addr) >> PMD_SHIFT) & (PTRS_PER_PMD - 1))
	401	static inline pmd_t pmd_offset(pud_t pud, unsigned long addr)
	402	{
	403	return (pmd_t )pud_page_vaddr(pud) + pmd_index(addr);
	404	}
	405	#endif
	406
	407	/* Find an entry in the third-level page table.. */
9ab6d02f	408	#define pte_index(addr) (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
4f04d8f0 CM	409
	410	static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
	411	{
a6fadf7e	412	const pteval_t mask = PTE_USER \| PTE_PXN \| PTE_UXN \| PTE_RDONLY \|
c2c93e5b	413	PTE_PROT_NONE \| PTE_VALID \| PTE_WRITE;
4f04d8f0 CM	414	pte_val(pte) = (pte_val(pte) & ~mask) \| (pgprot_val(newprot) & mask);
	415	return pte;
	416	}
	417
9c7e535f SC	418	static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
	419	{
	420	return pte_pmd(pte_modify(pmd_pte(pmd), newprot));
	421	}
	422
4f04d8f0 CM	423	extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
	424	extern pgd_t idmap_pg_dir[PTRS_PER_PGD];
	425
4f04d8f0 CM	426	/*
4f04d8f0 CM	427	* Encode and decode a swap entry:
3676f9ef CM	428	* bits 0-1: present (must be zero)
	429	* bit 2: PTE_FILE
	430	* bits 3-8: swap type
	431	* bits 9-57: swap offset
4f04d8f0	432	*/
3676f9ef	433	#define __SWP_TYPE_SHIFT 3
4f04d8f0	434	#define __SWP_TYPE_BITS 6
3676f9ef	435	#define __SWP_OFFSET_BITS 49
4f04d8f0 CM	436	#define __SWP_TYPE_MASK ((1 << __SWP_TYPE_BITS) - 1)
4f04d8f0 CM	437	#define __SWP_OFFSET_SHIFT (__SWP_TYPE_BITS + __SWP_TYPE_SHIFT)
3676f9ef	438	#define __SWP_OFFSET_MASK ((1UL << __SWP_OFFSET_BITS) - 1)
4f04d8f0 CM	439
4f04d8f0 CM	440	#define __swp_type(x) (((x).val >> __SWP_TYPE_SHIFT) & __SWP_TYPE_MASK)
3676f9ef	441	#define __swp_offset(x) (((x).val >> __SWP_OFFSET_SHIFT) & __SWP_OFFSET_MASK)
4f04d8f0 CM	442	#define __swp_entry(type,offset) ((swp_entry_t) { ((type) << __SWP_TYPE_SHIFT) \| ((offset) << __SWP_OFFSET_SHIFT) })
	443
	444	#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
	445	#define __swp_entry_to_pte(swp) ((pte_t) { (swp).val })
	446
	447	/*
	448	* Ensure that there are not more swap files than can be encoded in the kernel
aad9061b	449	* PTEs.
4f04d8f0 CM	450	*/
	451	#define MAX_SWAPFILES_CHECK() BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > __SWP_TYPE_BITS)
	452
	453	/*
	454	* Encode and decode a file entry:
3676f9ef CM	455	* bits 0-1: present (must be zero)
	456	* bit 2: PTE_FILE
	457	* bits 3-57: file offset / PAGE_SIZE
4f04d8f0 CM	458	*/
4f04d8f0 CM	459	#define pte_file(pte) (pte_val(pte) & PTE_FILE)
3676f9ef CM	460	#define pte_to_pgoff(x) (pte_val(x) >> 3)
3676f9ef CM	461	#define pgoff_to_pte(x) __pte(((x) << 3) \| PTE_FILE)
4f04d8f0	462
3676f9ef	463	#define PTE_FILE_MAX_BITS 55
4f04d8f0 CM	464
	465	extern int kern_addr_valid(unsigned long addr);
	466
	467	#include <asm-generic/pgtable.h>
	468
4f04d8f0 CM	469	#define pgtable_cache_init() do { } while (0)
	470
	471	#endif /* !__ASSEMBLY__ */
	472
	473	#endif /* __ASM_PGTABLE_H */