diff options
Diffstat (limited to 'linux-2.6-xen-sparse/include/asm-i386/mach-xen/asm/pgtable.h')
| -rw-r--r-- | linux-2.6-xen-sparse/include/asm-i386/mach-xen/asm/pgtable.h | 531 |
1 files changed, 0 insertions, 531 deletions
diff --git a/linux-2.6-xen-sparse/include/asm-i386/mach-xen/asm/pgtable.h b/linux-2.6-xen-sparse/include/asm-i386/mach-xen/asm/pgtable.h deleted file mode 100644 index a6defb4d83..0000000000 --- a/linux-2.6-xen-sparse/include/asm-i386/mach-xen/asm/pgtable.h +++ /dev/null @@ -1,531 +0,0 @@ -#ifndef _I386_PGTABLE_H -#define _I386_PGTABLE_H - -#include <asm/hypervisor.h> - -/* - * The Linux memory management assumes a three-level page table setup. On - * the i386, we use that, but "fold" the mid level into the top-level page - * table, so that we physically have the same two-level page table as the - * i386 mmu expects. - * - * This file contains the functions and defines necessary to modify and use - * the i386 page table tree. - */ -#ifndef __ASSEMBLY__ -#include <asm/processor.h> -#include <asm/fixmap.h> -#include <linux/threads.h> - -#ifndef _I386_BITOPS_H -#include <asm/bitops.h> -#endif - -#include <linux/slab.h> -#include <linux/list.h> -#include <linux/spinlock.h> - -/* Is this pagetable pinned? */ -#define PG_pinned PG_arch_1 - -struct mm_struct; -struct vm_area_struct; - -/* - * ZERO_PAGE is a global shared page that is always zero: used - * for zero-mapped memory areas etc.. - */ -#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) -extern unsigned long empty_zero_page[1024]; -extern pgd_t *swapper_pg_dir; -extern kmem_cache_t *pgd_cache; -extern kmem_cache_t *pmd_cache; -extern spinlock_t pgd_lock; -extern struct page *pgd_list; - -void pmd_ctor(void *, kmem_cache_t *, unsigned long); -void pgd_ctor(void *, kmem_cache_t *, unsigned long); -void pgd_dtor(void *, kmem_cache_t *, unsigned long); -void pgtable_cache_init(void); -void paging_init(void); - -/* - * The Linux x86 paging architecture is 'compile-time dual-mode', it - * implements both the traditional 2-level x86 page tables and the - * newer 3-level PAE-mode page tables. - */ -#ifdef CONFIG_X86_PAE -# include <asm/pgtable-3level-defs.h> -# define PMD_SIZE (1UL << PMD_SHIFT) -# define PMD_MASK (~(PMD_SIZE-1)) -#else -# include <asm/pgtable-2level-defs.h> -#endif - -#define PGDIR_SIZE (1UL << PGDIR_SHIFT) -#define PGDIR_MASK (~(PGDIR_SIZE-1)) - -#define USER_PTRS_PER_PGD (TASK_SIZE/PGDIR_SIZE) -#define FIRST_USER_ADDRESS 0 - -#define USER_PGD_PTRS (PAGE_OFFSET >> PGDIR_SHIFT) -#define KERNEL_PGD_PTRS (PTRS_PER_PGD-USER_PGD_PTRS) - -#define TWOLEVEL_PGDIR_SHIFT 22 -#define BOOT_USER_PGD_PTRS (__PAGE_OFFSET >> TWOLEVEL_PGDIR_SHIFT) -#define BOOT_KERNEL_PGD_PTRS (1024-BOOT_USER_PGD_PTRS) - -/* Just any arbitrary offset to the start of the vmalloc VM area: the - * current 8MB value just means that there will be a 8MB "hole" after the - * physical memory until the kernel virtual memory starts. That means that - * any out-of-bounds memory accesses will hopefully be caught. - * The vmalloc() routines leaves a hole of 4kB between each vmalloced - * area for the same reason. ;) - */ -#define VMALLOC_OFFSET (8*1024*1024) -#define VMALLOC_START (((unsigned long) high_memory + vmalloc_earlyreserve + \ - 2*VMALLOC_OFFSET-1) & ~(VMALLOC_OFFSET-1)) -#ifdef CONFIG_HIGHMEM -# define VMALLOC_END (PKMAP_BASE-2*PAGE_SIZE) -#else -# define VMALLOC_END (FIXADDR_START-2*PAGE_SIZE) -#endif - -/* - * _PAGE_PSE set in the page directory entry just means that - * the page directory entry points directly to a 4MB-aligned block of - * memory. - */ -#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_PSE 7 /* 4 MB (or 2MB) page, Pentium+, if present.. */ -#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 - -#define _PAGE_PRESENT 0x001 -#define _PAGE_RW 0x002 -#define _PAGE_USER 0x004 -#define _PAGE_PWT 0x008 -#define _PAGE_PCD 0x010 -#define _PAGE_ACCESSED 0x020 -#define _PAGE_DIRTY 0x040 -#define _PAGE_PSE 0x080 /* 4 MB (or 2MB) page, Pentium+, if present.. */ -#define _PAGE_GLOBAL 0x100 /* Global TLB entry PPro+ */ -#define _PAGE_UNUSED1 0x200 /* available for programmer */ -#define _PAGE_UNUSED2 0x400 -#define _PAGE_UNUSED3 0x800 - -/* If _PAGE_PRESENT is clear, we use these: */ -#define _PAGE_FILE 0x040 /* nonlinear file mapping, saved PTE; unset:swap */ -#define _PAGE_PROTNONE 0x080 /* if the user mapped it with PROT_NONE; - pte_present gives true */ -#ifdef CONFIG_X86_PAE -#define _PAGE_NX (1ULL<<_PAGE_BIT_NX) -#else -#define _PAGE_NX 0 -#endif - -#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) - -#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) - -#define _PAGE_KERNEL \ - (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_NX) -#define _PAGE_KERNEL_EXEC \ - (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED) - -extern unsigned long long __PAGE_KERNEL, __PAGE_KERNEL_EXEC; -#define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW) -#define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL | _PAGE_PCD) -#define __PAGE_KERNEL_LARGE (__PAGE_KERNEL | _PAGE_PSE) -#define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC | _PAGE_PSE) - -#define PAGE_KERNEL __pgprot(__PAGE_KERNEL) -#define PAGE_KERNEL_RO __pgprot(__PAGE_KERNEL_RO) -#define PAGE_KERNEL_EXEC __pgprot(__PAGE_KERNEL_EXEC) -#define PAGE_KERNEL_NOCACHE __pgprot(__PAGE_KERNEL_NOCACHE) -#define PAGE_KERNEL_LARGE __pgprot(__PAGE_KERNEL_LARGE) -#define PAGE_KERNEL_LARGE_EXEC __pgprot(__PAGE_KERNEL_LARGE_EXEC) - -/* - * The i386 can't do page protection for execute, and considers that - * the same are read. Also, write permissions imply read permissions. - * This is the closest we can get.. - */ -#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 - -/* - * Define this if things work differently on an i386 and an i486: - * it will (on an i486) warn about kernel memory accesses that are - * done without a 'access_ok(VERIFY_WRITE,..)' - */ -#undef TEST_ACCESS_OK - -/* The boot page tables (all created as a single array) */ -extern unsigned long pg0[]; - -#define pte_present(x) ((x).pte_low & (_PAGE_PRESENT | _PAGE_PROTNONE)) - -/* To avoid harmful races, pmd_none(x) should check only the lower when PAE */ -#define pmd_none(x) (!(unsigned long)__pmd_val(x)) -#if CONFIG_XEN_COMPAT <= 0x030002 -/* pmd_present doesn't just test the _PAGE_PRESENT bit since wr.p.t. - can temporarily clear it. */ -#define pmd_present(x) (__pmd_val(x)) -#define pmd_bad(x) ((__pmd_val(x) & (~PAGE_MASK & ~_PAGE_USER & ~_PAGE_PRESENT)) != (_KERNPG_TABLE & ~_PAGE_PRESENT)) -#else -#define pmd_present(x) (__pmd_val(x) & _PAGE_PRESENT) -#define pmd_bad(x) ((__pmd_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE) -#endif - - -#define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT)) - -/* - * The following only work if pte_present() is true. - * Undefined behaviour if not.. - */ -static inline int pte_user(pte_t pte) { return (pte).pte_low & _PAGE_USER; } -static inline int pte_read(pte_t pte) { return (pte).pte_low & _PAGE_USER; } -static inline int pte_dirty(pte_t pte) { return (pte).pte_low & _PAGE_DIRTY; } -static inline int pte_young(pte_t pte) { return (pte).pte_low & _PAGE_ACCESSED; } -static inline int pte_write(pte_t pte) { return (pte).pte_low & _PAGE_RW; } -static inline int pte_huge(pte_t pte) { return (pte).pte_low & _PAGE_PSE; } - -/* - * The following only works if pte_present() is not true. - */ -static inline int pte_file(pte_t pte) { return (pte).pte_low & _PAGE_FILE; } - -static inline pte_t pte_rdprotect(pte_t pte) { (pte).pte_low &= ~_PAGE_USER; return pte; } -static inline pte_t pte_exprotect(pte_t pte) { (pte).pte_low &= ~_PAGE_USER; return pte; } -static inline pte_t pte_mkclean(pte_t pte) { (pte).pte_low &= ~_PAGE_DIRTY; return pte; } -static inline pte_t pte_mkold(pte_t pte) { (pte).pte_low &= ~_PAGE_ACCESSED; return pte; } -static inline pte_t pte_wrprotect(pte_t pte) { (pte).pte_low &= ~_PAGE_RW; return pte; } -static inline pte_t pte_mkread(pte_t pte) { (pte).pte_low |= _PAGE_USER; return pte; } -static inline pte_t pte_mkexec(pte_t pte) { (pte).pte_low |= _PAGE_USER; return pte; } -static inline pte_t pte_mkdirty(pte_t pte) { (pte).pte_low |= _PAGE_DIRTY; return pte; } -static inline pte_t pte_mkyoung(pte_t pte) { (pte).pte_low |= _PAGE_ACCESSED; return pte; } -static inline pte_t pte_mkwrite(pte_t pte) { (pte).pte_low |= _PAGE_RW; return pte; } -static inline pte_t pte_mkhuge(pte_t pte) { (pte).pte_low |= _PAGE_PSE; return pte; } - -#ifdef CONFIG_X86_PAE -# include <asm/pgtable-3level.h> -#else -# include <asm/pgtable-2level.h> -#endif - -#define ptep_test_and_clear_dirty(vma, addr, ptep) \ -({ \ - pte_t __pte = *(ptep); \ - int __ret = pte_dirty(__pte); \ - if (__ret) { \ - __pte = pte_mkclean(__pte); \ - if ((vma)->vm_mm != current->mm || \ - HYPERVISOR_update_va_mapping(addr, __pte, 0)) \ - (ptep)->pte_low = __pte.pte_low; \ - } \ - __ret; \ -}) - -#define ptep_test_and_clear_young(vma, addr, ptep) \ -({ \ - pte_t __pte = *(ptep); \ - int __ret = pte_young(__pte); \ - if (__ret) \ - __pte = pte_mkold(__pte); \ - if ((vma)->vm_mm != current->mm || \ - HYPERVISOR_update_va_mapping(addr, __pte, 0)) \ - (ptep)->pte_low = __pte.pte_low; \ - __ret; \ -}) - -#define ptep_get_and_clear_full(mm, addr, ptep, full) \ - ((full) ? ({ \ - pte_t __res = *(ptep); \ - if (test_bit(PG_pinned, &virt_to_page((mm)->pgd)->flags)) \ - xen_l1_entry_update(ptep, __pte(0)); \ - else \ - *(ptep) = __pte(0); \ - __res; \ - }) : \ - ptep_get_and_clear(mm, addr, ptep)) - -static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep) -{ - pte_t pte = *ptep; - if (pte_write(pte)) - set_pte_at(mm, addr, ptep, pte_wrprotect(pte)); -} - -/* - * clone_pgd_range(pgd_t *dst, pgd_t *src, int count); - * - * dst - pointer to pgd range anwhere on a pgd page - * src - "" - * count - the number of pgds to copy. - * - * dst and src can be on the same page, but the range must not overlap, - * and must not cross a page boundary. - */ -static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count) -{ - memcpy(dst, src, count * sizeof(pgd_t)); -} - -/* - * Macro to mark a page protection value as "uncacheable". On processors which do not support - * it, this is a no-op. - */ -#define pgprot_noncached(prot) ((boot_cpu_data.x86 > 3) \ - ? (__pgprot(pgprot_val(prot) | _PAGE_PCD | _PAGE_PWT)) : (prot)) - -/* - * 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, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) - -static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) -{ - /* - * Since this might change the present bit (which controls whether - * a pte_t object has undergone p2m translation), we must use - * pte_val() on the input pte and __pte() for the return value. - */ - paddr_t pteval = pte_val(pte); - - pteval &= _PAGE_CHG_MASK; - pteval |= pgprot_val(newprot); -#ifdef CONFIG_X86_PAE - pteval &= __supported_pte_mask; -#endif - return __pte(pteval); -} - -#define pmd_large(pmd) \ -((__pmd_val(pmd) & (_PAGE_PSE|_PAGE_PRESENT)) == (_PAGE_PSE|_PAGE_PRESENT)) - -/* - * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD] - * - * this macro returns the index of the entry in the pgd page which would - * control the given virtual address - */ -#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1)) -#define pgd_index_k(addr) pgd_index(addr) - -/* - * pgd_offset() returns a (pgd_t *) - * pgd_index() is used get the offset into the pgd page's array of pgd_t's; - */ -#define pgd_offset(mm, address) ((mm)->pgd+pgd_index(address)) - -/* - * a shortcut which implies the use of the kernel's pgd, instead - * of a process's - */ -#define pgd_offset_k(address) pgd_offset(&init_mm, address) - -/* - * the pmd page can be thought of an array like this: pmd_t[PTRS_PER_PMD] - * - * this macro returns the index of the entry in the pmd page which would - * control the given virtual address - */ -#define pmd_index(address) \ - (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)) - -/* - * the pte page can be thought of an array like this: pte_t[PTRS_PER_PTE] - * - * this macro returns the index of the entry in the pte page which would - * control the given virtual address - */ -#define pte_index(address) \ - (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) -#define pte_offset_kernel(dir, address) \ - ((pte_t *) pmd_page_kernel(*(dir)) + pte_index(address)) - -#define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT)) - -#define pmd_page_kernel(pmd) \ - ((unsigned long) __va(pmd_val(pmd) & PAGE_MASK)) - -/* - * Helper function that returns the kernel pagetable entry controlling - * the virtual address 'address'. NULL means no pagetable entry present. - * NOTE: the return type is pte_t but if the pmd is PSE then we return it - * as a pte too. - */ -extern pte_t *lookup_address(unsigned long address); - -/* - * Make a given kernel text page executable/non-executable. - * Returns the previous executability setting of that page (which - * is used to restore the previous state). Used by the SMP bootup code. - * NOTE: this is an __init function for security reasons. - */ -#ifdef CONFIG_X86_PAE - extern int set_kernel_exec(unsigned long vaddr, int enable); -#else - static inline int set_kernel_exec(unsigned long vaddr, int enable) { return 0;} -#endif - -extern void noexec_setup(const char *str); - -#if defined(CONFIG_HIGHPTE) -#define pte_offset_map(dir, address) \ - ((pte_t *)kmap_atomic_pte(pmd_page(*(dir)),KM_PTE0) + \ - pte_index(address)) -#define pte_offset_map_nested(dir, address) \ - ((pte_t *)kmap_atomic_pte(pmd_page(*(dir)),KM_PTE1) + \ - pte_index(address)) -#define pte_unmap(pte) kunmap_atomic(pte, KM_PTE0) -#define pte_unmap_nested(pte) kunmap_atomic(pte, KM_PTE1) -#else -#define pte_offset_map(dir, address) \ - ((pte_t *)page_address(pmd_page(*(dir))) + pte_index(address)) -#define pte_offset_map_nested(dir, address) pte_offset_map(dir, address) -#define pte_unmap(pte) do { } while (0) -#define pte_unmap_nested(pte) do { } while (0) -#endif - -#define __HAVE_ARCH_PTEP_ESTABLISH -#define ptep_establish(vma, address, ptep, pteval) \ - do { \ - if ( likely((vma)->vm_mm == current->mm) ) { \ - BUG_ON(HYPERVISOR_update_va_mapping(address, \ - pteval, \ - (unsigned long)(vma)->vm_mm->cpu_vm_mask.bits| \ - UVMF_INVLPG|UVMF_MULTI)); \ - } else { \ - xen_l1_entry_update(ptep, pteval); \ - flush_tlb_page(vma, address); \ - } \ - } while (0) - -/* - * The i386 doesn't have any external MMU info: the kernel page - * tables contain all the necessary information. - * - * Also, we only update the dirty/accessed state if we set - * the dirty bit by hand in the kernel, since the hardware - * will do the accessed bit for us, and we don't want to - * race with other CPU's that might be updating the dirty - * bit at the same time. - */ -#define update_mmu_cache(vma,address,pte) do { } while (0) -#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS -#define ptep_set_access_flags(vma, address, ptep, entry, dirty) \ - do { \ - if (dirty) \ - ptep_establish(vma, address, ptep, entry); \ - } while (0) - -#include <xen/features.h> -void make_lowmem_page_readonly(void *va, unsigned int feature); -void make_lowmem_page_writable(void *va, unsigned int feature); -void make_page_readonly(void *va, unsigned int feature); -void make_page_writable(void *va, unsigned int feature); -void make_pages_readonly(void *va, unsigned int nr, unsigned int feature); -void make_pages_writable(void *va, unsigned int nr, unsigned int feature); - -#define virt_to_ptep(__va) \ -({ \ - pgd_t *__pgd = pgd_offset_k((unsigned long)(__va)); \ - pud_t *__pud = pud_offset(__pgd, (unsigned long)(__va)); \ - pmd_t *__pmd = pmd_offset(__pud, (unsigned long)(__va)); \ - pte_offset_kernel(__pmd, (unsigned long)(__va)); \ -}) - -#define arbitrary_virt_to_machine(__va) \ -({ \ - maddr_t m = (maddr_t)pte_mfn(*virt_to_ptep(__va)) << PAGE_SHIFT;\ - m | ((unsigned long)(__va) & (PAGE_SIZE-1)); \ -}) - -#endif /* !__ASSEMBLY__ */ - -#ifdef CONFIG_FLATMEM -#define kern_addr_valid(addr) (1) -#endif /* CONFIG_FLATMEM */ - -int direct_remap_pfn_range(struct vm_area_struct *vma, - unsigned long address, - unsigned long mfn, - unsigned long size, - pgprot_t prot, - domid_t domid); -int direct_kernel_remap_pfn_range(unsigned long address, - unsigned long mfn, - unsigned long size, - pgprot_t prot, - domid_t domid); -int create_lookup_pte_addr(struct mm_struct *mm, - unsigned long address, - uint64_t *ptep); -int touch_pte_range(struct mm_struct *mm, - unsigned long address, - unsigned long size); - -#define io_remap_pfn_range(vma,from,pfn,size,prot) \ -direct_remap_pfn_range(vma,from,pfn,size,prot,DOMID_IO) - -#define MK_IOSPACE_PFN(space, pfn) (pfn) -#define GET_IOSPACE(pfn) 0 -#define GET_PFN(pfn) (pfn) - -#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG -#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY -#define __HAVE_ARCH_PTEP_GET_AND_CLEAR -#define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL -#define __HAVE_ARCH_PTEP_CLEAR_FLUSH -#define __HAVE_ARCH_PTEP_SET_WRPROTECT -#define __HAVE_ARCH_PTE_SAME -#include <asm-generic/pgtable.h> - -#endif /* _I386_PGTABLE_H */ |