2009-02-08 19:46:18 -07:00
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#ifndef _ASM_X86_PGTABLE_DEFS_H
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#define _ASM_X86_PGTABLE_DEFS_H
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#include <linux/const.h>
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2009-02-13 05:24:19 -07:00
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#include <asm/page_types.h>
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2009-02-08 19:46:18 -07:00
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#define FIRST_USER_ADDRESS 0
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#define _PAGE_BIT_PRESENT 0 /* is present */
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#define _PAGE_BIT_RW 1 /* writeable */
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#define _PAGE_BIT_USER 2 /* userspace addressable */
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#define _PAGE_BIT_PWT 3 /* page write through */
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#define _PAGE_BIT_PCD 4 /* page cache disabled */
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#define _PAGE_BIT_ACCESSED 5 /* was accessed (raised by CPU) */
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#define _PAGE_BIT_DIRTY 6 /* was written to (raised by CPU) */
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#define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page */
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#define _PAGE_BIT_PAT 7 /* on 4KB pages */
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#define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */
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#define _PAGE_BIT_UNUSED1 9 /* available for programmer */
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#define _PAGE_BIT_IOMAP 10 /* flag used to indicate IO mapping */
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2008-04-03 16:51:41 -06:00
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#define _PAGE_BIT_HIDDEN 11 /* hidden by kmemcheck */
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2009-02-08 19:46:18 -07:00
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#define _PAGE_BIT_PAT_LARGE 12 /* On 2MB or 1GB pages */
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#define _PAGE_BIT_SPECIAL _PAGE_BIT_UNUSED1
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#define _PAGE_BIT_CPA_TEST _PAGE_BIT_UNUSED1
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#define _PAGE_BIT_NX 63 /* No execute: only valid after cpuid check */
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/* If _PAGE_BIT_PRESENT is clear, we use these: */
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/* - if the user mapped it with PROT_NONE; pte_present gives true */
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#define _PAGE_BIT_PROTNONE _PAGE_BIT_GLOBAL
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/* - set: nonlinear file mapping, saved PTE; unset:swap */
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#define _PAGE_BIT_FILE _PAGE_BIT_DIRTY
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#define _PAGE_PRESENT (_AT(pteval_t, 1) << _PAGE_BIT_PRESENT)
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#define _PAGE_RW (_AT(pteval_t, 1) << _PAGE_BIT_RW)
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#define _PAGE_USER (_AT(pteval_t, 1) << _PAGE_BIT_USER)
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#define _PAGE_PWT (_AT(pteval_t, 1) << _PAGE_BIT_PWT)
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#define _PAGE_PCD (_AT(pteval_t, 1) << _PAGE_BIT_PCD)
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#define _PAGE_ACCESSED (_AT(pteval_t, 1) << _PAGE_BIT_ACCESSED)
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#define _PAGE_DIRTY (_AT(pteval_t, 1) << _PAGE_BIT_DIRTY)
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#define _PAGE_PSE (_AT(pteval_t, 1) << _PAGE_BIT_PSE)
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#define _PAGE_GLOBAL (_AT(pteval_t, 1) << _PAGE_BIT_GLOBAL)
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#define _PAGE_UNUSED1 (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED1)
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#define _PAGE_IOMAP (_AT(pteval_t, 1) << _PAGE_BIT_IOMAP)
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#define _PAGE_PAT (_AT(pteval_t, 1) << _PAGE_BIT_PAT)
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#define _PAGE_PAT_LARGE (_AT(pteval_t, 1) << _PAGE_BIT_PAT_LARGE)
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#define _PAGE_SPECIAL (_AT(pteval_t, 1) << _PAGE_BIT_SPECIAL)
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#define _PAGE_CPA_TEST (_AT(pteval_t, 1) << _PAGE_BIT_CPA_TEST)
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#define __HAVE_ARCH_PTE_SPECIAL
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2009-02-06 14:05:01 -07:00
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#ifdef CONFIG_KMEMCHECK
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#define _PAGE_HIDDEN (_AT(pteval_t, 1) << _PAGE_BIT_HIDDEN)
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#else
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#define _PAGE_HIDDEN (_AT(pteval_t, 0))
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#endif
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2009-02-08 19:46:18 -07:00
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#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
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#define _PAGE_NX (_AT(pteval_t, 1) << _PAGE_BIT_NX)
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#else
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#define _PAGE_NX (_AT(pteval_t, 0))
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#endif
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#define _PAGE_FILE (_AT(pteval_t, 1) << _PAGE_BIT_FILE)
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#define _PAGE_PROTNONE (_AT(pteval_t, 1) << _PAGE_BIT_PROTNONE)
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#define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \
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_PAGE_ACCESSED | _PAGE_DIRTY)
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#define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | \
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_PAGE_DIRTY)
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/* Set of bits not changed in pte_modify */
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#define _PAGE_CHG_MASK (PTE_PFN_MASK | _PAGE_PCD | _PAGE_PWT | \
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_PAGE_SPECIAL | _PAGE_ACCESSED | _PAGE_DIRTY)
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#define _PAGE_CACHE_MASK (_PAGE_PCD | _PAGE_PWT)
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#define _PAGE_CACHE_WB (0)
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#define _PAGE_CACHE_WC (_PAGE_PWT)
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#define _PAGE_CACHE_UC_MINUS (_PAGE_PCD)
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#define _PAGE_CACHE_UC (_PAGE_PCD | _PAGE_PWT)
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#define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED)
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#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \
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_PAGE_ACCESSED | _PAGE_NX)
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#define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT | _PAGE_RW | \
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_PAGE_USER | _PAGE_ACCESSED)
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#define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \
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_PAGE_ACCESSED | _PAGE_NX)
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#define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \
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_PAGE_ACCESSED)
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#define PAGE_COPY PAGE_COPY_NOEXEC
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#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | \
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_PAGE_ACCESSED | _PAGE_NX)
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#define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \
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_PAGE_ACCESSED)
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#define __PAGE_KERNEL_EXEC \
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(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_GLOBAL)
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#define __PAGE_KERNEL (__PAGE_KERNEL_EXEC | _PAGE_NX)
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#define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW)
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#define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW)
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#define __PAGE_KERNEL_EXEC_NOCACHE (__PAGE_KERNEL_EXEC | _PAGE_PCD | _PAGE_PWT)
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#define __PAGE_KERNEL_WC (__PAGE_KERNEL | _PAGE_CACHE_WC)
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#define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL | _PAGE_PCD | _PAGE_PWT)
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#define __PAGE_KERNEL_UC_MINUS (__PAGE_KERNEL | _PAGE_PCD)
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#define __PAGE_KERNEL_VSYSCALL (__PAGE_KERNEL_RX | _PAGE_USER)
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#define __PAGE_KERNEL_VSYSCALL_NOCACHE (__PAGE_KERNEL_VSYSCALL | _PAGE_PCD | _PAGE_PWT)
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#define __PAGE_KERNEL_LARGE (__PAGE_KERNEL | _PAGE_PSE)
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#define __PAGE_KERNEL_LARGE_NOCACHE (__PAGE_KERNEL | _PAGE_CACHE_UC | _PAGE_PSE)
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#define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC | _PAGE_PSE)
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#define __PAGE_KERNEL_IO (__PAGE_KERNEL | _PAGE_IOMAP)
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#define __PAGE_KERNEL_IO_NOCACHE (__PAGE_KERNEL_NOCACHE | _PAGE_IOMAP)
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#define __PAGE_KERNEL_IO_UC_MINUS (__PAGE_KERNEL_UC_MINUS | _PAGE_IOMAP)
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#define __PAGE_KERNEL_IO_WC (__PAGE_KERNEL_WC | _PAGE_IOMAP)
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#define PAGE_KERNEL __pgprot(__PAGE_KERNEL)
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#define PAGE_KERNEL_RO __pgprot(__PAGE_KERNEL_RO)
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#define PAGE_KERNEL_EXEC __pgprot(__PAGE_KERNEL_EXEC)
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#define PAGE_KERNEL_RX __pgprot(__PAGE_KERNEL_RX)
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#define PAGE_KERNEL_WC __pgprot(__PAGE_KERNEL_WC)
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#define PAGE_KERNEL_NOCACHE __pgprot(__PAGE_KERNEL_NOCACHE)
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#define PAGE_KERNEL_UC_MINUS __pgprot(__PAGE_KERNEL_UC_MINUS)
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#define PAGE_KERNEL_EXEC_NOCACHE __pgprot(__PAGE_KERNEL_EXEC_NOCACHE)
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#define PAGE_KERNEL_LARGE __pgprot(__PAGE_KERNEL_LARGE)
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#define PAGE_KERNEL_LARGE_NOCACHE __pgprot(__PAGE_KERNEL_LARGE_NOCACHE)
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#define PAGE_KERNEL_LARGE_EXEC __pgprot(__PAGE_KERNEL_LARGE_EXEC)
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#define PAGE_KERNEL_VSYSCALL __pgprot(__PAGE_KERNEL_VSYSCALL)
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#define PAGE_KERNEL_VSYSCALL_NOCACHE __pgprot(__PAGE_KERNEL_VSYSCALL_NOCACHE)
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#define PAGE_KERNEL_IO __pgprot(__PAGE_KERNEL_IO)
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#define PAGE_KERNEL_IO_NOCACHE __pgprot(__PAGE_KERNEL_IO_NOCACHE)
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#define PAGE_KERNEL_IO_UC_MINUS __pgprot(__PAGE_KERNEL_IO_UC_MINUS)
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#define PAGE_KERNEL_IO_WC __pgprot(__PAGE_KERNEL_IO_WC)
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/* xwr */
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#define __P000 PAGE_NONE
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#define __P001 PAGE_READONLY
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#define __P010 PAGE_COPY
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#define __P011 PAGE_COPY
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#define __P100 PAGE_READONLY_EXEC
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#define __P101 PAGE_READONLY_EXEC
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#define __P110 PAGE_COPY_EXEC
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#define __P111 PAGE_COPY_EXEC
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#define __S000 PAGE_NONE
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#define __S001 PAGE_READONLY
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#define __S010 PAGE_SHARED
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#define __S011 PAGE_SHARED
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#define __S100 PAGE_READONLY_EXEC
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#define __S101 PAGE_READONLY_EXEC
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#define __S110 PAGE_SHARED_EXEC
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#define __S111 PAGE_SHARED_EXEC
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/*
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* early identity mapping pte attrib macros.
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*/
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#ifdef CONFIG_X86_64
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#define __PAGE_KERNEL_IDENT_LARGE_EXEC __PAGE_KERNEL_LARGE_EXEC
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#else
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/*
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* For PDE_IDENT_ATTR include USER bit. As the PDE and PTE protection
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* bits are combined, this will alow user to access the high address mapped
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* VDSO in the presence of CONFIG_COMPAT_VDSO
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*/
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#define PTE_IDENT_ATTR 0x003 /* PRESENT+RW */
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#define PDE_IDENT_ATTR 0x067 /* PRESENT+RW+USER+DIRTY+ACCESSED */
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#define PGD_IDENT_ATTR 0x001 /* PRESENT (no other attributes) */
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#endif
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2009-02-11 11:20:05 -07:00
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#ifdef CONFIG_X86_32
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# include "pgtable_32_types.h"
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#else
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# include "pgtable_64_types.h"
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#endif
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2009-02-08 19:46:18 -07:00
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#ifndef __ASSEMBLY__
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2009-02-11 11:20:05 -07:00
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#include <linux/types.h>
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2009-02-13 12:01:54 -07:00
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/* PTE_PFN_MASK extracts the PFN from a (pte|pmd|pud|pgd)val_t */
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#define PTE_PFN_MASK ((pteval_t)PHYSICAL_PAGE_MASK)
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/* PTE_FLAGS_MASK extracts the flags from a (pte|pmd|pud|pgd)val_t */
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#define PTE_FLAGS_MASK (~PTE_PFN_MASK)
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2009-02-11 11:20:05 -07:00
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typedef struct pgprot { pgprotval_t pgprot; } pgprot_t;
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typedef struct { pgdval_t pgd; } pgd_t;
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static inline pgd_t native_make_pgd(pgdval_t val)
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{
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return (pgd_t) { val };
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}
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static inline pgdval_t native_pgd_val(pgd_t pgd)
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{
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return pgd.pgd;
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}
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static inline pgdval_t pgd_flags(pgd_t pgd)
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{
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return native_pgd_val(pgd) & PTE_FLAGS_MASK;
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}
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#if PAGETABLE_LEVELS > 3
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typedef struct { pudval_t pud; } pud_t;
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static inline pud_t native_make_pud(pmdval_t val)
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{
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return (pud_t) { val };
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}
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static inline pudval_t native_pud_val(pud_t pud)
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{
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return pud.pud;
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}
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#else
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#include <asm-generic/pgtable-nopud.h>
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static inline pudval_t native_pud_val(pud_t pud)
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{
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return native_pgd_val(pud.pgd);
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}
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#endif
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#if PAGETABLE_LEVELS > 2
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typedef struct { pmdval_t pmd; } pmd_t;
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static inline pmd_t native_make_pmd(pmdval_t val)
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{
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return (pmd_t) { val };
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}
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static inline pmdval_t native_pmd_val(pmd_t pmd)
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{
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return pmd.pmd;
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}
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#else
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#include <asm-generic/pgtable-nopmd.h>
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static inline pmdval_t native_pmd_val(pmd_t pmd)
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{
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return native_pgd_val(pmd.pud.pgd);
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}
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#endif
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static inline pudval_t pud_flags(pud_t pud)
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{
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return native_pud_val(pud) & PTE_FLAGS_MASK;
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}
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static inline pmdval_t pmd_flags(pmd_t pmd)
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{
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return native_pmd_val(pmd) & PTE_FLAGS_MASK;
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}
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static inline pte_t native_make_pte(pteval_t val)
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{
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return (pte_t) { .pte = val };
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}
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static inline pteval_t native_pte_val(pte_t pte)
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{
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return pte.pte;
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}
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static inline pteval_t pte_flags(pte_t pte)
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{
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return native_pte_val(pte) & PTE_FLAGS_MASK;
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}
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#define pgprot_val(x) ((x).pgprot)
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#define __pgprot(x) ((pgprot_t) { (x) } )
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typedef struct page *pgtable_t;
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2009-02-08 19:46:18 -07:00
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extern pteval_t __supported_pte_mask;
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2009-09-21 14:40:42 -06:00
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extern void set_nx(void);
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2009-02-11 11:20:05 -07:00
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extern int nx_enabled;
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2009-02-08 19:46:18 -07:00
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#define pgprot_writecombine pgprot_writecombine
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extern pgprot_t pgprot_writecombine(pgprot_t prot);
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/* Indicate that x86 has its own track and untrack pfn vma functions */
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#define __HAVE_PFNMAP_TRACKING
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#define __HAVE_PHYS_MEM_ACCESS_PROT
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struct file;
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pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
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unsigned long size, pgprot_t vma_prot);
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int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn,
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unsigned long size, pgprot_t *vma_prot);
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/* Install a pte for a particular vaddr in kernel space. */
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void set_pte_vaddr(unsigned long vaddr, pte_t pte);
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#ifdef CONFIG_X86_32
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extern void native_pagetable_setup_start(pgd_t *base);
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extern void native_pagetable_setup_done(pgd_t *base);
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#else
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2009-08-20 06:30:02 -06:00
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#define native_pagetable_setup_start x86_init_pgd_noop
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#define native_pagetable_setup_done x86_init_pgd_noop
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2009-02-08 19:46:18 -07:00
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#endif
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struct seq_file;
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extern void arch_report_meminfo(struct seq_file *m);
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enum {
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PG_LEVEL_NONE,
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PG_LEVEL_4K,
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PG_LEVEL_2M,
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PG_LEVEL_1G,
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PG_LEVEL_NUM
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};
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#ifdef CONFIG_PROC_FS
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extern void update_page_count(int level, unsigned long pages);
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#else
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static inline void update_page_count(int level, unsigned long pages) { }
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#endif
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/*
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* Helper function that returns the kernel pagetable entry controlling
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* the virtual address 'address'. NULL means no pagetable entry present.
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* NOTE: the return type is pte_t but if the pmd is PSE then we return it
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* as a pte too.
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*/
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extern pte_t *lookup_address(unsigned long address, unsigned int *level);
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#endif /* !__ASSEMBLY__ */
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#endif /* _ASM_X86_PGTABLE_DEFS_H */
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