38f0f12793
based on: Subject: x86: page.h: move and unify types for pagetable entry From: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
266 lines
6.2 KiB
C
266 lines
6.2 KiB
C
#ifndef _ASM_X86_PAGE_H
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#define _ASM_X86_PAGE_H
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#include <linux/const.h>
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/* PAGE_SHIFT determines the page size */
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#define PAGE_SHIFT 12
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#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
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#define PAGE_MASK (~(PAGE_SIZE-1))
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#define PHYSICAL_PAGE_MASK (PAGE_MASK & __PHYSICAL_MASK)
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#define PTE_MASK PHYSICAL_PAGE_MASK
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#define LARGE_PAGE_SIZE (_AC(1,UL) << PMD_SHIFT)
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#define LARGE_PAGE_MASK (~(LARGE_PAGE_SIZE-1))
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#define HPAGE_SHIFT PMD_SHIFT
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#define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT)
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#define HPAGE_MASK (~(HPAGE_SIZE - 1))
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#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
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/* to align the pointer to the (next) page boundary */
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#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
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#define __PHYSICAL_MASK ((_AC(1,UL) << __PHYSICAL_MASK_SHIFT) - 1)
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#define __VIRTUAL_MASK ((_AC(1,UL) << __VIRTUAL_MASK_SHIFT) - 1)
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#ifndef __ASSEMBLY__
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#include <linux/types.h>
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#endif
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#ifdef CONFIG_X86_64
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#define PAGETABLE_LEVELS 4
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#define THREAD_ORDER 1
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#define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER)
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#define CURRENT_MASK (~(THREAD_SIZE-1))
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#define EXCEPTION_STACK_ORDER 0
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#define EXCEPTION_STKSZ (PAGE_SIZE << EXCEPTION_STACK_ORDER)
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#define DEBUG_STACK_ORDER (EXCEPTION_STACK_ORDER + 1)
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#define DEBUG_STKSZ (PAGE_SIZE << DEBUG_STACK_ORDER)
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#define IRQSTACK_ORDER 2
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#define IRQSTACKSIZE (PAGE_SIZE << IRQSTACK_ORDER)
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#define STACKFAULT_STACK 1
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#define DOUBLEFAULT_STACK 2
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#define NMI_STACK 3
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#define DEBUG_STACK 4
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#define MCE_STACK 5
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#define N_EXCEPTION_STACKS 5 /* hw limit: 7 */
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#define __PAGE_OFFSET _AC(0xffff810000000000, UL)
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#define __PHYSICAL_START CONFIG_PHYSICAL_START
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#define __KERNEL_ALIGN 0x200000
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/*
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* Make sure kernel is aligned to 2MB address. Catching it at compile
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* time is better. Change your config file and compile the kernel
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* for a 2MB aligned address (CONFIG_PHYSICAL_START)
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*/
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#if (CONFIG_PHYSICAL_START % __KERNEL_ALIGN) != 0
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#error "CONFIG_PHYSICAL_START must be a multiple of 2MB"
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#endif
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#define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START)
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#define __START_KERNEL_map _AC(0xffffffff80000000, UL)
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/* See Documentation/x86_64/mm.txt for a description of the memory map. */
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#define __PHYSICAL_MASK_SHIFT 46
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#define __VIRTUAL_MASK_SHIFT 48
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#define KERNEL_TEXT_SIZE (40*1024*1024)
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#define KERNEL_TEXT_START _AC(0xffffffff80000000, UL)
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#ifndef __ASSEMBLY__
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void clear_page(void *page);
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void copy_page(void *to, void *from);
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/*
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* These are used to make use of C type-checking..
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*/
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typedef unsigned long pteval_t;
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typedef unsigned long pmdval_t;
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typedef unsigned long pudval_t;
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typedef unsigned long pgdval_t;
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typedef unsigned long pgprotval_t;
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typedef unsigned long phys_addr_t;
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typedef struct { pteval_t pte; } pte_t;
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#define native_pte_val(x) ((x).pte)
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#define native_make_pte(x) ((pte_t) { (x) } )
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#endif /* !__ASSEMBLY__ */
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#endif /* CONFIG_X86_64 */
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#ifdef CONFIG_X86_32
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/*
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* This handles the memory map.
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*
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* A __PAGE_OFFSET of 0xC0000000 means that the kernel has
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* a virtual address space of one gigabyte, which limits the
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* amount of physical memory you can use to about 950MB.
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*
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* If you want more physical memory than this then see the CONFIG_HIGHMEM4G
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* and CONFIG_HIGHMEM64G options in the kernel configuration.
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*/
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#define __PAGE_OFFSET _AC(CONFIG_PAGE_OFFSET, UL)
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#ifdef CONFIG_X86_PAE
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#define __PHYSICAL_MASK_SHIFT 36
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#define __VIRTUAL_MASK_SHIFT 32
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#else /* !CONFIG_X86_PAE */
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#define __PHYSICAL_MASK_SHIFT 32
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#define __VIRTUAL_MASK_SHIFT 32
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#endif /* CONFIG_X86_PAE */
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#ifdef CONFIG_HUGETLB_PAGE
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#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
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#endif
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#ifndef __ASSEMBLY__
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#ifdef CONFIG_X86_USE_3DNOW
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#include <asm/mmx.h>
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static inline void clear_page(void *page)
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{
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mmx_clear_page(page);
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}
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static inline void copy_page(void *to, void *from)
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{
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mmx_copy_page(to, from);
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}
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#else /* !CONFIG_X86_USE_3DNOW */
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#include <linux/string.h>
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static inline void clear_page(void *page)
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{
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memset(page, 0, PAGE_SIZE);
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}
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static inline void copy_page(void *to, void *from)
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{
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memcpy(to, from, PAGE_SIZE);
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}
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#endif /* CONFIG_X86_3DNOW */
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#endif /* !__ASSEMBLY__ */
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#endif /* CONFIG_X86_32 */
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#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
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#define VM_DATA_DEFAULT_FLAGS \
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(((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
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VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
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#ifndef __ASSEMBLY__
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struct page;
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static void inline clear_user_page(void *page, unsigned long vaddr,
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struct page *pg)
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{
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clear_page(page);
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}
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static void inline copy_user_page(void *to, void *from, unsigned long vaddr,
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struct page *topage)
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{
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copy_page(to, from);
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}
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#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
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alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
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#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
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#ifdef CONFIG_X86_64
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typedef struct { pgdval_t pgd; } pgd_t;
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typedef struct { pgprotval_t pgprot; } pgprot_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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#if PAGETABLE_LEVELS >= 3
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#if PAGETABLE_LEVELS == 4
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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 /* PAGETABLE_LEVELS == 3 */
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#include <asm-generic/pgtable-nopud.h>
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#endif /* PAGETABLE_LEVELS == 4 */
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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 /* PAGETABLE_LEVELS == 2 */
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#include <asm-generic/pgtable-nopmd.h>
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#endif /* PAGETABLE_LEVELS >= 3 */
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#define pgprot_val(x) ((x).pgprot)
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#define __pgprot(x) ((pgprot_t) { (x) } )
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#ifdef CONFIG_PARAVIRT
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#include <asm/paravirt.h>
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#else /* !CONFIG_PARAVIRT */
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#define pgd_val(x) native_pgd_val(x)
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#define __pgd(x) native_make_pgd(x)
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#ifndef __PAGETABLE_PUD_FOLDED
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#define pud_val(x) native_pud_val(x)
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#define __pud(x) native_make_pud(x)
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#endif
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#ifndef __PAGETABLE_PMD_FOLDED
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#define pmd_val(x) native_pmd_val(x)
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#define __pmd(x) native_make_pmd(x)
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#endif
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#define pte_val(x) native_pte_val(x)
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#define __pte(x) native_make_pte(x)
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#endif /* CONFIG_PARAVIRT */
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#endif /* CONFIG_X86_64 */
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#endif /* __ASSEMBLY__ */
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#ifdef CONFIG_X86_32
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# include "page_32.h"
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#else
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# include "page_64.h"
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#endif
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#endif /* _ASM_X86_PAGE_H */
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