[mirror_ubuntu-bionic-kernel.git] / include / asm-x86 / pgtable.h

#ifndef _ASM_X86_PGTABLE_H
#define _ASM_X86_PGTABLE_H

#define USER_PTRS_PER_PGD	((TASK_SIZE-1)/PGDIR_SIZE+1)
#define FIRST_USER_ADDRESS	0

#define _PAGE_BIT_PRESENT	0
#define _PAGE_BIT_RW		1
#define _PAGE_BIT_USER		2
#define _PAGE_BIT_PWT		3
#define _PAGE_BIT_PCD		4
#define _PAGE_BIT_ACCESSED	5
#define _PAGE_BIT_DIRTY		6
#define _PAGE_BIT_FILE		6
#define _PAGE_BIT_PSE		7	/* 4 MB (or 2MB) page */
#define _PAGE_BIT_GLOBAL	8	/* Global TLB entry PPro+ */
#define _PAGE_BIT_UNUSED1	9	/* available for programmer */
#define _PAGE_BIT_UNUSED2	10
#define _PAGE_BIT_UNUSED3	11
#define _PAGE_BIT_NX           63       /* No execute: only valid after cpuid check */

#define _PAGE_PRESENT	(_AC(1, L)<<_PAGE_BIT_PRESENT)
#define _PAGE_RW	(_AC(1, L)<<_PAGE_BIT_RW)
#define _PAGE_USER	(_AC(1, L)<<_PAGE_BIT_USER)
#define _PAGE_PWT	(_AC(1, L)<<_PAGE_BIT_PWT)
#define _PAGE_PCD	(_AC(1, L)<<_PAGE_BIT_PCD)
#define _PAGE_ACCESSED	(_AC(1, L)<<_PAGE_BIT_ACCESSED)
#define _PAGE_DIRTY	(_AC(1, L)<<_PAGE_BIT_DIRTY)
#define _PAGE_PSE	(_AC(1, L)<<_PAGE_BIT_PSE)	/* 2MB page */
#define _PAGE_GLOBAL	(_AC(1, L)<<_PAGE_BIT_GLOBAL)	/* Global TLB entry */
#define _PAGE_UNUSED1	(_AC(1, L)<<_PAGE_BIT_UNUSED1)
#define _PAGE_UNUSED2	(_AC(1, L)<<_PAGE_BIT_UNUSED2)
#define _PAGE_UNUSED3	(_AC(1, L)<<_PAGE_BIT_UNUSED3)

#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
#define _PAGE_NX	(_AC(1, ULL) << _PAGE_BIT_NX)
#else
#define _PAGE_NX	0
#endif

/* If _PAGE_PRESENT is clear, we use these: */
#define _PAGE_FILE	_PAGE_DIRTY	/* nonlinear file mapping, saved PTE; unset:swap */
#define _PAGE_PROTNONE	_PAGE_PSE	/* if the user mapped it with PROT_NONE;
					   pte_present gives true */

#define _PAGE_TABLE	(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_DIRTY)
#define _KERNPG_TABLE	(_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY)

#define _PAGE_CHG_MASK	(PTE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY)

#define PAGE_NONE	__pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED)
#define PAGE_SHARED	__pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX)

#define PAGE_SHARED_EXEC	__pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED)
#define PAGE_COPY_NOEXEC	__pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX)
#define PAGE_COPY_EXEC		__pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
#define PAGE_COPY		PAGE_COPY_NOEXEC
#define PAGE_READONLY		__pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX)
#define PAGE_READONLY_EXEC	__pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)

#ifdef CONFIG_X86_32
#define _PAGE_KERNEL_EXEC \
	(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED)
#define _PAGE_KERNEL (_PAGE_KERNEL_EXEC | _PAGE_NX)

#ifndef __ASSEMBLY__
extern unsigned long long __PAGE_KERNEL, __PAGE_KERNEL_EXEC;
#endif	/* __ASSEMBLY__ */
#else
#define __PAGE_KERNEL_EXEC						\
	(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED)
#define __PAGE_KERNEL		(__PAGE_KERNEL_EXEC | _PAGE_NX)
#endif

#define __PAGE_KERNEL_RO		(__PAGE_KERNEL & ~_PAGE_RW)
#define __PAGE_KERNEL_RX		(__PAGE_KERNEL_EXEC & ~_PAGE_RW)
#define __PAGE_KERNEL_NOCACHE		(__PAGE_KERNEL | _PAGE_PCD | _PAGE_PWT)
#define __PAGE_KERNEL_VSYSCALL		(__PAGE_KERNEL_RX | _PAGE_USER)
#define __PAGE_KERNEL_VSYSCALL_NOCACHE	(__PAGE_KERNEL_VSYSCALL | _PAGE_PCD | _PAGE_PWT)
#define __PAGE_KERNEL_LARGE		(__PAGE_KERNEL | _PAGE_PSE)
#define __PAGE_KERNEL_LARGE_EXEC	(__PAGE_KERNEL_EXEC | _PAGE_PSE)

#ifdef CONFIG_X86_32
# define MAKE_GLOBAL(x)			__pgprot((x))
#else
# define MAKE_GLOBAL(x)			__pgprot((x) | _PAGE_GLOBAL)
#endif

#define PAGE_KERNEL			MAKE_GLOBAL(__PAGE_KERNEL)
#define PAGE_KERNEL_RO			MAKE_GLOBAL(__PAGE_KERNEL_RO)
#define PAGE_KERNEL_EXEC		MAKE_GLOBAL(__PAGE_KERNEL_EXEC)
#define PAGE_KERNEL_RX			MAKE_GLOBAL(__PAGE_KERNEL_RX)
#define PAGE_KERNEL_NOCACHE		MAKE_GLOBAL(__PAGE_KERNEL_NOCACHE)
#define PAGE_KERNEL_LARGE		MAKE_GLOBAL(__PAGE_KERNEL_LARGE)
#define PAGE_KERNEL_LARGE_EXEC		MAKE_GLOBAL(__PAGE_KERNEL_LARGE_EXEC)
#define PAGE_KERNEL_VSYSCALL		MAKE_GLOBAL(__PAGE_KERNEL_VSYSCALL)
#define PAGE_KERNEL_VSYSCALL_NOCACHE	MAKE_GLOBAL(__PAGE_KERNEL_VSYSCALL_NOCACHE)

/*         xwr */
#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__
/*
 * The following only work if pte_present() is true.
 * Undefined behaviour if not..
 */
static inline int pte_dirty(pte_t pte)		{ return pte_val(pte) & _PAGE_DIRTY; }
static inline int pte_young(pte_t pte)		{ return pte_val(pte) & _PAGE_ACCESSED; }
static inline int pte_write(pte_t pte)		{ return pte_val(pte) & _PAGE_RW; }
static inline int pte_file(pte_t pte)		{ return pte_val(pte) & _PAGE_FILE; }
static inline int pte_huge(pte_t pte)		{ return pte_val(pte) & _PAGE_PSE; }

static inline int pmd_large(pmd_t pte) {
	return (pmd_val(pte) & (_PAGE_PSE|_PAGE_PRESENT)) ==
		(_PAGE_PSE|_PAGE_PRESENT);
}

static inline pte_t pte_mkclean(pte_t pte)	{ return __pte(pte_val(pte) & ~_PAGE_DIRTY); }
static inline pte_t pte_mkold(pte_t pte)	{ return __pte(pte_val(pte) & ~_PAGE_ACCESSED); }
static inline pte_t pte_wrprotect(pte_t pte)	{ return __pte(pte_val(pte) & ~_PAGE_RW); }
static inline pte_t pte_mkexec(pte_t pte)	{ return __pte(pte_val(pte) & ~_PAGE_NX); }
static inline pte_t pte_mkdirty(pte_t pte)	{ return __pte(pte_val(pte) | _PAGE_DIRTY); }
static inline pte_t pte_mkyoung(pte_t pte)	{ return __pte(pte_val(pte) | _PAGE_ACCESSED); }
static inline pte_t pte_mkwrite(pte_t pte)	{ return __pte(pte_val(pte) | _PAGE_RW); }
static inline pte_t pte_mkhuge(pte_t pte)	{ return __pte(pte_val(pte) | _PAGE_PSE); }
static inline pte_t pte_clrhuge(pte_t pte)	{ return __pte(pte_val(pte) & ~_PAGE_PSE); }

#endif	/* __ASSEMBLY__ */

#ifdef CONFIG_X86_32
# include "pgtable_32.h"
#else
# include "pgtable_64.h"
#endif

#endif	/* _ASM_X86_PGTABLE_H */
Commit	Line	Data
6c386655 JF	1	#ifndef _ASM_X86_PGTABLE_H
	2	#define _ASM_X86_PGTABLE_H
	3
	4	#define USER_PTRS_PER_PGD ((TASK_SIZE-1)/PGDIR_SIZE+1)
	5	#define FIRST_USER_ADDRESS 0
	6
	7	#define _PAGE_BIT_PRESENT 0
	8	#define _PAGE_BIT_RW 1
	9	#define _PAGE_BIT_USER 2
	10	#define _PAGE_BIT_PWT 3
	11	#define _PAGE_BIT_PCD 4
	12	#define _PAGE_BIT_ACCESSED 5
	13	#define _PAGE_BIT_DIRTY 6
	14	#define _PAGE_BIT_FILE 6
	15	#define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page */
	16	#define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */
	17	#define _PAGE_BIT_UNUSED1 9 /* available for programmer */
	18	#define _PAGE_BIT_UNUSED2 10
	19	#define _PAGE_BIT_UNUSED3 11
	20	#define _PAGE_BIT_NX 63 /* No execute: only valid after cpuid check */
	21
61f38226 IM	22	#define _PAGE_PRESENT (_AC(1, L)<<_PAGE_BIT_PRESENT)
	23	#define _PAGE_RW (_AC(1, L)<<_PAGE_BIT_RW)
	24	#define _PAGE_USER (_AC(1, L)<<_PAGE_BIT_USER)
	25	#define _PAGE_PWT (_AC(1, L)<<_PAGE_BIT_PWT)
	26	#define _PAGE_PCD (_AC(1, L)<<_PAGE_BIT_PCD)
	27	#define _PAGE_ACCESSED (_AC(1, L)<<_PAGE_BIT_ACCESSED)
	28	#define _PAGE_DIRTY (_AC(1, L)<<_PAGE_BIT_DIRTY)
	29	#define _PAGE_PSE (_AC(1, L)<<_PAGE_BIT_PSE) /* 2MB page */
	30	#define _PAGE_GLOBAL (_AC(1, L)<<_PAGE_BIT_GLOBAL) /* Global TLB entry */
	31	#define _PAGE_UNUSED1 (_AC(1, L)<<_PAGE_BIT_UNUSED1)
	32	#define _PAGE_UNUSED2 (_AC(1, L)<<_PAGE_BIT_UNUSED2)
	33	#define _PAGE_UNUSED3 (_AC(1, L)<<_PAGE_BIT_UNUSED3)
6c386655 JF	34
	35	#if defined(CONFIG_X86_64) \|\| defined(CONFIG_X86_PAE)
	36	#define _PAGE_NX (_AC(1, ULL) << _PAGE_BIT_NX)
	37	#else
	38	#define _PAGE_NX 0
	39	#endif
	40
	41	/* If _PAGE_PRESENT is clear, we use these: */
	42	#define _PAGE_FILE _PAGE_DIRTY /* nonlinear file mapping, saved PTE; unset:swap */
	43	#define _PAGE_PROTNONE _PAGE_PSE /* if the user mapped it with PROT_NONE;
	44	pte_present gives true */
	45
	46	#define _PAGE_TABLE (_PAGE_PRESENT \| _PAGE_RW \| _PAGE_USER \| _PAGE_ACCESSED \| _PAGE_DIRTY)
	47	#define _KERNPG_TABLE (_PAGE_PRESENT \| _PAGE_RW \| _PAGE_ACCESSED \| _PAGE_DIRTY)
	48
	49	#define _PAGE_CHG_MASK (PTE_MASK \| _PAGE_ACCESSED \| _PAGE_DIRTY)
	50
	51	#define PAGE_NONE __pgprot(_PAGE_PROTNONE \| _PAGE_ACCESSED)
	52	#define PAGE_SHARED __pgprot(_PAGE_PRESENT \| _PAGE_RW \| _PAGE_USER \| _PAGE_ACCESSED \| _PAGE_NX)
	53
	54	#define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT \| _PAGE_RW \| _PAGE_USER \| _PAGE_ACCESSED)
	55	#define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT \| _PAGE_USER \| _PAGE_ACCESSED \| _PAGE_NX)
	56	#define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT \| _PAGE_USER \| _PAGE_ACCESSED)
	57	#define PAGE_COPY PAGE_COPY_NOEXEC
	58	#define PAGE_READONLY __pgprot(_PAGE_PRESENT \| _PAGE_USER \| _PAGE_ACCESSED \| _PAGE_NX)
	59	#define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT \| _PAGE_USER \| _PAGE_ACCESSED)
	60
	61	#ifdef CONFIG_X86_32
	62	#define _PAGE_KERNEL_EXEC \
	63	(_PAGE_PRESENT \| _PAGE_RW \| _PAGE_DIRTY \| _PAGE_ACCESSED)
	64	#define _PAGE_KERNEL (_PAGE_KERNEL_EXEC \| _PAGE_NX)
	65
	66	#ifndef __ASSEMBLY__
	67	extern unsigned long long __PAGE_KERNEL, __PAGE_KERNEL_EXEC;
	68	#endif /* __ASSEMBLY__ */
	69	#else
	70	#define __PAGE_KERNEL_EXEC \
	71	(_PAGE_PRESENT \| _PAGE_RW \| _PAGE_DIRTY \| _PAGE_ACCESSED)
	72	#define __PAGE_KERNEL (__PAGE_KERNEL_EXEC \| _PAGE_NX)
	73	#endif
	74
	75	#define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW)
	76	#define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW)
	77	#define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL \| _PAGE_PCD \| _PAGE_PWT)
	78	#define __PAGE_KERNEL_VSYSCALL (__PAGE_KERNEL_RX \| _PAGE_USER)
	79	#define __PAGE_KERNEL_VSYSCALL_NOCACHE (__PAGE_KERNEL_VSYSCALL \| _PAGE_PCD \| _PAGE_PWT)
	80	#define __PAGE_KERNEL_LARGE (__PAGE_KERNEL \| _PAGE_PSE)
	81	#define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC \| _PAGE_PSE)
	82
	83	#ifdef CONFIG_X86_32
	84	# define MAKE_GLOBAL(x) __pgprot((x))
	85	#else
	86	# define MAKE_GLOBAL(x) __pgprot((x) \| _PAGE_GLOBAL)
	87	#endif
	88
	89	#define PAGE_KERNEL MAKE_GLOBAL(__PAGE_KERNEL)
	90	#define PAGE_KERNEL_RO MAKE_GLOBAL(__PAGE_KERNEL_RO)
	91	#define PAGE_KERNEL_EXEC MAKE_GLOBAL(__PAGE_KERNEL_EXEC)
	92	#define PAGE_KERNEL_RX MAKE_GLOBAL(__PAGE_KERNEL_RX)
	93	#define PAGE_KERNEL_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_NOCACHE)
	94	#define PAGE_KERNEL_LARGE MAKE_GLOBAL(__PAGE_KERNEL_LARGE)
	95	#define PAGE_KERNEL_LARGE_EXEC MAKE_GLOBAL(__PAGE_KERNEL_LARGE_EXEC)
	96	#define PAGE_KERNEL_VSYSCALL MAKE_GLOBAL(__PAGE_KERNEL_VSYSCALL)
	97	#define PAGE_KERNEL_VSYSCALL_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_VSYSCALL_NOCACHE)
98
99	/* xwr */
100	#define __P000 PAGE_NONE
101	#define __P001 PAGE_READONLY
102	#define __P010 PAGE_COPY
103	#define __P011 PAGE_COPY
104	#define __P100 PAGE_READONLY_EXEC
105	#define __P101 PAGE_READONLY_EXEC
106	#define __P110 PAGE_COPY_EXEC
107	#define __P111 PAGE_COPY_EXEC
108
109	#define __S000 PAGE_NONE
110	#define __S001 PAGE_READONLY
111	#define __S010 PAGE_SHARED
112	#define __S011 PAGE_SHARED
113	#define __S100 PAGE_READONLY_EXEC
114	#define __S101 PAGE_READONLY_EXEC
115	#define __S110 PAGE_SHARED_EXEC
116	#define __S111 PAGE_SHARED_EXEC
117
4614139c JF	118	#ifndef __ASSEMBLY__
	119	/*
	120	* The following only work if pte_present() is true.
	121	* Undefined behaviour if not..
	122	*/
	123	static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; }
	124	static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; }
	125	static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_RW; }
	126	static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE; }
	127	static inline int pte_huge(pte_t pte) { return pte_val(pte) & _PAGE_PSE; }
	128
	129	static inline int pmd_large(pmd_t pte) {
	130	return (pmd_val(pte) & (_PAGE_PSE\|_PAGE_PRESENT)) ==
	131	(_PAGE_PSE\|_PAGE_PRESENT);
	132	}
	133
	134	static inline pte_t pte_mkclean(pte_t pte) { return __pte(pte_val(pte) & ~_PAGE_DIRTY); }
	135	static inline pte_t pte_mkold(pte_t pte) { return __pte(pte_val(pte) & ~_PAGE_ACCESSED); }
	136	static inline pte_t pte_wrprotect(pte_t pte) { return __pte(pte_val(pte) & ~_PAGE_RW); }
	137	static inline pte_t pte_mkexec(pte_t pte) { return __pte(pte_val(pte) & ~_PAGE_NX); }
	138	static inline pte_t pte_mkdirty(pte_t pte) { return __pte(pte_val(pte) \| _PAGE_DIRTY); }
	139	static inline pte_t pte_mkyoung(pte_t pte) { return __pte(pte_val(pte) \| _PAGE_ACCESSED); }
	140	static inline pte_t pte_mkwrite(pte_t pte) { return __pte(pte_val(pte) \| _PAGE_RW); }
	141	static inline pte_t pte_mkhuge(pte_t pte) { return __pte(pte_val(pte) \| _PAGE_PSE); }
	142	static inline pte_t pte_clrhuge(pte_t pte) { return __pte(pte_val(pte) & ~_PAGE_PSE); }
	143
	144	#endif /* __ASSEMBLY__ */
	145
96a388de TG	146	#ifdef CONFIG_X86_32
	147	# include "pgtable_32.h"
	148	#else
	149	# include "pgtable_64.h"
	150	#endif
6c386655 JF	151
6c386655 JF	152	#endif /* _ASM_X86_PGTABLE_H */