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-rw-r--r--include/asm-ia64/pgtable.h615
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diff --git a/include/asm-ia64/pgtable.h b/include/asm-ia64/pgtable.h
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--- a/include/asm-ia64/pgtable.h
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-#ifndef _ASM_IA64_PGTABLE_H
-#define _ASM_IA64_PGTABLE_H
-
-/*
- * This file contains the functions and defines necessary to modify and use
- * the IA-64 page table tree.
- *
- * This hopefully works with any (fixed) IA-64 page-size, as defined
- * in <asm/page.h>.
- *
- * Copyright (C) 1998-2005 Hewlett-Packard Co
- * David Mosberger-Tang <davidm@hpl.hp.com>
- */
-
-
-#include <asm/mman.h>
-#include <asm/page.h>
-#include <asm/processor.h>
-#include <asm/system.h>
-#include <asm/types.h>
-
-#define IA64_MAX_PHYS_BITS 50 /* max. number of physical address bits (architected) */
-
-/*
- * First, define the various bits in a PTE. Note that the PTE format
- * matches the VHPT short format, the firt doubleword of the VHPD long
- * format, and the first doubleword of the TLB insertion format.
- */
-#define _PAGE_P_BIT 0
-#define _PAGE_A_BIT 5
-#define _PAGE_D_BIT 6
-
-#define _PAGE_P (1 << _PAGE_P_BIT) /* page present bit */
-#define _PAGE_MA_WB (0x0 << 2) /* write back memory attribute */
-#define _PAGE_MA_UC (0x4 << 2) /* uncacheable memory attribute */
-#define _PAGE_MA_UCE (0x5 << 2) /* UC exported attribute */
-#define _PAGE_MA_WC (0x6 << 2) /* write coalescing memory attribute */
-#define _PAGE_MA_NAT (0x7 << 2) /* not-a-thing attribute */
-#define _PAGE_MA_MASK (0x7 << 2)
-#define _PAGE_PL_0 (0 << 7) /* privilege level 0 (kernel) */
-#define _PAGE_PL_1 (1 << 7) /* privilege level 1 (unused) */
-#define _PAGE_PL_2 (2 << 7) /* privilege level 2 (unused) */
-#define _PAGE_PL_3 (3 << 7) /* privilege level 3 (user) */
-#define _PAGE_PL_MASK (3 << 7)
-#define _PAGE_AR_R (0 << 9) /* read only */
-#define _PAGE_AR_RX (1 << 9) /* read & execute */
-#define _PAGE_AR_RW (2 << 9) /* read & write */
-#define _PAGE_AR_RWX (3 << 9) /* read, write & execute */
-#define _PAGE_AR_R_RW (4 << 9) /* read / read & write */
-#define _PAGE_AR_RX_RWX (5 << 9) /* read & exec / read, write & exec */
-#define _PAGE_AR_RWX_RW (6 << 9) /* read, write & exec / read & write */
-#define _PAGE_AR_X_RX (7 << 9) /* exec & promote / read & exec */
-#define _PAGE_AR_MASK (7 << 9)
-#define _PAGE_AR_SHIFT 9
-#define _PAGE_A (1 << _PAGE_A_BIT) /* page accessed bit */
-#define _PAGE_D (1 << _PAGE_D_BIT) /* page dirty bit */
-#define _PAGE_PPN_MASK (((__IA64_UL(1) << IA64_MAX_PHYS_BITS) - 1) & ~0xfffUL)
-#define _PAGE_ED (__IA64_UL(1) << 52) /* exception deferral */
-#define _PAGE_PROTNONE (__IA64_UL(1) << 63)
-
-/* Valid only for a PTE with the present bit cleared: */
-#define _PAGE_FILE (1 << 1) /* see swap & file pte remarks below */
-
-#define _PFN_MASK _PAGE_PPN_MASK
-/* Mask of bits which may be changed by pte_modify(); the odd bits are there for _PAGE_PROTNONE */
-#define _PAGE_CHG_MASK (_PAGE_P | _PAGE_PROTNONE | _PAGE_PL_MASK | _PAGE_AR_MASK | _PAGE_ED)
-
-#define _PAGE_SIZE_4K 12
-#define _PAGE_SIZE_8K 13
-#define _PAGE_SIZE_16K 14
-#define _PAGE_SIZE_64K 16
-#define _PAGE_SIZE_256K 18
-#define _PAGE_SIZE_1M 20
-#define _PAGE_SIZE_4M 22
-#define _PAGE_SIZE_16M 24
-#define _PAGE_SIZE_64M 26
-#define _PAGE_SIZE_256M 28
-#define _PAGE_SIZE_1G 30
-#define _PAGE_SIZE_4G 32
-
-#define __ACCESS_BITS _PAGE_ED | _PAGE_A | _PAGE_P | _PAGE_MA_WB
-#define __DIRTY_BITS_NO_ED _PAGE_A | _PAGE_P | _PAGE_D | _PAGE_MA_WB
-#define __DIRTY_BITS _PAGE_ED | __DIRTY_BITS_NO_ED
-
-/*
- * How many pointers will a page table level hold expressed in shift
- */
-#define PTRS_PER_PTD_SHIFT (PAGE_SHIFT-3)
-
-/*
- * Definitions for fourth level:
- */
-#define PTRS_PER_PTE (__IA64_UL(1) << (PTRS_PER_PTD_SHIFT))
-
-/*
- * Definitions for third level:
- *
- * PMD_SHIFT determines the size of the area a third-level page table
- * can map.
- */
-#define PMD_SHIFT (PAGE_SHIFT + (PTRS_PER_PTD_SHIFT))
-#define PMD_SIZE (1UL << PMD_SHIFT)
-#define PMD_MASK (~(PMD_SIZE-1))
-#define PTRS_PER_PMD (1UL << (PTRS_PER_PTD_SHIFT))
-
-#ifdef CONFIG_PGTABLE_4
-/*
- * Definitions for second level:
- *
- * PUD_SHIFT determines the size of the area a second-level page table
- * can map.
- */
-#define PUD_SHIFT (PMD_SHIFT + (PTRS_PER_PTD_SHIFT))
-#define PUD_SIZE (1UL << PUD_SHIFT)
-#define PUD_MASK (~(PUD_SIZE-1))
-#define PTRS_PER_PUD (1UL << (PTRS_PER_PTD_SHIFT))
-#endif
-
-/*
- * Definitions for first level:
- *
- * PGDIR_SHIFT determines what a first-level page table entry can map.
- */
-#ifdef CONFIG_PGTABLE_4
-#define PGDIR_SHIFT (PUD_SHIFT + (PTRS_PER_PTD_SHIFT))
-#else
-#define PGDIR_SHIFT (PMD_SHIFT + (PTRS_PER_PTD_SHIFT))
-#endif
-#define PGDIR_SIZE (__IA64_UL(1) << PGDIR_SHIFT)
-#define PGDIR_MASK (~(PGDIR_SIZE-1))
-#define PTRS_PER_PGD_SHIFT PTRS_PER_PTD_SHIFT
-#define PTRS_PER_PGD (1UL << PTRS_PER_PGD_SHIFT)
-#define USER_PTRS_PER_PGD (5*PTRS_PER_PGD/8) /* regions 0-4 are user regions */
-#define FIRST_USER_ADDRESS 0
-
-/*
- * All the normal masks have the "page accessed" bits on, as any time
- * they are used, the page is accessed. They are cleared only by the
- * page-out routines.
- */
-#define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_A)
-#define PAGE_SHARED __pgprot(__ACCESS_BITS | _PAGE_PL_3 | _PAGE_AR_RW)
-#define PAGE_READONLY __pgprot(__ACCESS_BITS | _PAGE_PL_3 | _PAGE_AR_R)
-#define PAGE_COPY __pgprot(__ACCESS_BITS | _PAGE_PL_3 | _PAGE_AR_R)
-#define PAGE_COPY_EXEC __pgprot(__ACCESS_BITS | _PAGE_PL_3 | _PAGE_AR_RX)
-#define PAGE_GATE __pgprot(__ACCESS_BITS | _PAGE_PL_0 | _PAGE_AR_X_RX)
-#define PAGE_KERNEL __pgprot(__DIRTY_BITS | _PAGE_PL_0 | _PAGE_AR_RWX)
-#define PAGE_KERNELRX __pgprot(__ACCESS_BITS | _PAGE_PL_0 | _PAGE_AR_RX)
-
-# ifndef __ASSEMBLY__
-
-#include <linux/sched.h> /* for mm_struct */
-#include <linux/bitops.h>
-#include <asm/cacheflush.h>
-#include <asm/mmu_context.h>
-#include <asm/processor.h>
-
-/*
- * Next come the mappings that determine how mmap() protection bits
- * (PROT_EXEC, PROT_READ, PROT_WRITE, PROT_NONE) get implemented. The
- * _P version gets used for a private shared memory segment, the _S
- * version gets used for a shared memory segment with MAP_SHARED on.
- * In a private shared memory segment, we do a copy-on-write if a task
- * attempts to write to the page.
- */
- /* xwr */
-#define __P000 PAGE_NONE
-#define __P001 PAGE_READONLY
-#define __P010 PAGE_READONLY /* write to priv pg -> copy & make writable */
-#define __P011 PAGE_READONLY /* ditto */
-#define __P100 __pgprot(__ACCESS_BITS | _PAGE_PL_3 | _PAGE_AR_X_RX)
-#define __P101 __pgprot(__ACCESS_BITS | _PAGE_PL_3 | _PAGE_AR_RX)
-#define __P110 PAGE_COPY_EXEC
-#define __P111 PAGE_COPY_EXEC
-
-#define __S000 PAGE_NONE
-#define __S001 PAGE_READONLY
-#define __S010 PAGE_SHARED /* we don't have (and don't need) write-only */
-#define __S011 PAGE_SHARED
-#define __S100 __pgprot(__ACCESS_BITS | _PAGE_PL_3 | _PAGE_AR_X_RX)
-#define __S101 __pgprot(__ACCESS_BITS | _PAGE_PL_3 | _PAGE_AR_RX)
-#define __S110 __pgprot(__ACCESS_BITS | _PAGE_PL_3 | _PAGE_AR_RWX)
-#define __S111 __pgprot(__ACCESS_BITS | _PAGE_PL_3 | _PAGE_AR_RWX)
-
-#define pgd_ERROR(e) printk("%s:%d: bad pgd %016lx.\n", __FILE__, __LINE__, pgd_val(e))
-#ifdef CONFIG_PGTABLE_4
-#define pud_ERROR(e) printk("%s:%d: bad pud %016lx.\n", __FILE__, __LINE__, pud_val(e))
-#endif
-#define pmd_ERROR(e) printk("%s:%d: bad pmd %016lx.\n", __FILE__, __LINE__, pmd_val(e))
-#define pte_ERROR(e) printk("%s:%d: bad pte %016lx.\n", __FILE__, __LINE__, pte_val(e))
-
-
-/*
- * Some definitions to translate between mem_map, PTEs, and page addresses:
- */
-
-
-/* Quick test to see if ADDR is a (potentially) valid physical address. */
-static inline long
-ia64_phys_addr_valid (unsigned long addr)
-{
- return (addr & (local_cpu_data->unimpl_pa_mask)) == 0;
-}
-
-/*
- * kern_addr_valid(ADDR) tests if ADDR is pointing to valid kernel
- * memory. For the return value to be meaningful, ADDR must be >=
- * PAGE_OFFSET. This operation can be relatively expensive (e.g.,
- * require a hash-, or multi-level tree-lookup or something of that
- * sort) but it guarantees to return TRUE only if accessing the page
- * at that address does not cause an error. Note that there may be
- * addresses for which kern_addr_valid() returns FALSE even though an
- * access would not cause an error (e.g., this is typically true for
- * memory mapped I/O regions.
- *
- * XXX Need to implement this for IA-64.
- */
-#define kern_addr_valid(addr) (1)
-
-
-/*
- * Now come the defines and routines to manage and access the three-level
- * page table.
- */
-
-
-#define VMALLOC_START (RGN_BASE(RGN_GATE) + 0x200000000UL)
-#ifdef CONFIG_VIRTUAL_MEM_MAP
-# define VMALLOC_END_INIT (RGN_BASE(RGN_GATE) + (1UL << (4*PAGE_SHIFT - 9)))
-# define VMALLOC_END vmalloc_end
- extern unsigned long vmalloc_end;
-#else
-#if defined(CONFIG_SPARSEMEM) && defined(CONFIG_SPARSEMEM_VMEMMAP)
-/* SPARSEMEM_VMEMMAP uses half of vmalloc... */
-# define VMALLOC_END (RGN_BASE(RGN_GATE) + (1UL << (4*PAGE_SHIFT - 10)))
-# define vmemmap ((struct page *)VMALLOC_END)
-#else
-# define VMALLOC_END (RGN_BASE(RGN_GATE) + (1UL << (4*PAGE_SHIFT - 9)))
-#endif
-#endif
-
-/* fs/proc/kcore.c */
-#define kc_vaddr_to_offset(v) ((v) - RGN_BASE(RGN_GATE))
-#define kc_offset_to_vaddr(o) ((o) + RGN_BASE(RGN_GATE))
-
-#define RGN_MAP_SHIFT (PGDIR_SHIFT + PTRS_PER_PGD_SHIFT - 3)
-#define RGN_MAP_LIMIT ((1UL << RGN_MAP_SHIFT) - PAGE_SIZE) /* per region addr limit */
-
-/*
- * Conversion functions: convert page frame number (pfn) and a protection value to a page
- * table entry (pte).
- */
-#define pfn_pte(pfn, pgprot) \
-({ pte_t __pte; pte_val(__pte) = ((pfn) << PAGE_SHIFT) | pgprot_val(pgprot); __pte; })
-
-/* Extract pfn from pte. */
-#define pte_pfn(_pte) ((pte_val(_pte) & _PFN_MASK) >> PAGE_SHIFT)
-
-#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
-
-/* This takes a physical page address that is used by the remapping functions */
-#define mk_pte_phys(physpage, pgprot) \
-({ pte_t __pte; pte_val(__pte) = physpage + pgprot_val(pgprot); __pte; })
-
-#define pte_modify(_pte, newprot) \
- (__pte((pte_val(_pte) & ~_PAGE_CHG_MASK) | (pgprot_val(newprot) & _PAGE_CHG_MASK)))
-
-#define pte_none(pte) (!pte_val(pte))
-#define pte_present(pte) (pte_val(pte) & (_PAGE_P | _PAGE_PROTNONE))
-#define pte_clear(mm,addr,pte) (pte_val(*(pte)) = 0UL)
-/* pte_page() returns the "struct page *" corresponding to the PTE: */
-#define pte_page(pte) virt_to_page(((pte_val(pte) & _PFN_MASK) + PAGE_OFFSET))
-
-#define pmd_none(pmd) (!pmd_val(pmd))
-#define pmd_bad(pmd) (!ia64_phys_addr_valid(pmd_val(pmd)))
-#define pmd_present(pmd) (pmd_val(pmd) != 0UL)
-#define pmd_clear(pmdp) (pmd_val(*(pmdp)) = 0UL)
-#define pmd_page_vaddr(pmd) ((unsigned long) __va(pmd_val(pmd) & _PFN_MASK))
-#define pmd_page(pmd) virt_to_page((pmd_val(pmd) + PAGE_OFFSET))
-
-#define pud_none(pud) (!pud_val(pud))
-#define pud_bad(pud) (!ia64_phys_addr_valid(pud_val(pud)))
-#define pud_present(pud) (pud_val(pud) != 0UL)
-#define pud_clear(pudp) (pud_val(*(pudp)) = 0UL)
-#define pud_page_vaddr(pud) ((unsigned long) __va(pud_val(pud) & _PFN_MASK))
-#define pud_page(pud) virt_to_page((pud_val(pud) + PAGE_OFFSET))
-
-#ifdef CONFIG_PGTABLE_4
-#define pgd_none(pgd) (!pgd_val(pgd))
-#define pgd_bad(pgd) (!ia64_phys_addr_valid(pgd_val(pgd)))
-#define pgd_present(pgd) (pgd_val(pgd) != 0UL)
-#define pgd_clear(pgdp) (pgd_val(*(pgdp)) = 0UL)
-#define pgd_page_vaddr(pgd) ((unsigned long) __va(pgd_val(pgd) & _PFN_MASK))
-#define pgd_page(pgd) virt_to_page((pgd_val(pgd) + PAGE_OFFSET))
-#endif
-
-/*
- * The following have defined behavior only work if pte_present() is true.
- */
-#define pte_write(pte) ((unsigned) (((pte_val(pte) & _PAGE_AR_MASK) >> _PAGE_AR_SHIFT) - 2) <= 4)
-#define pte_exec(pte) ((pte_val(pte) & _PAGE_AR_RX) != 0)
-#define pte_dirty(pte) ((pte_val(pte) & _PAGE_D) != 0)
-#define pte_young(pte) ((pte_val(pte) & _PAGE_A) != 0)
-#define pte_file(pte) ((pte_val(pte) & _PAGE_FILE) != 0)
-#define pte_special(pte) 0
-
-/*
- * Note: we convert AR_RWX to AR_RX and AR_RW to AR_R by clearing the 2nd bit in the
- * access rights:
- */
-#define pte_wrprotect(pte) (__pte(pte_val(pte) & ~_PAGE_AR_RW))
-#define pte_mkwrite(pte) (__pte(pte_val(pte) | _PAGE_AR_RW))
-#define pte_mkold(pte) (__pte(pte_val(pte) & ~_PAGE_A))
-#define pte_mkyoung(pte) (__pte(pte_val(pte) | _PAGE_A))
-#define pte_mkclean(pte) (__pte(pte_val(pte) & ~_PAGE_D))
-#define pte_mkdirty(pte) (__pte(pte_val(pte) | _PAGE_D))
-#define pte_mkhuge(pte) (__pte(pte_val(pte)))
-#define pte_mkspecial(pte) (pte)
-
-/*
- * Because ia64's Icache and Dcache is not coherent (on a cpu), we need to
- * sync icache and dcache when we insert *new* executable page.
- * __ia64_sync_icache_dcache() check Pg_arch_1 bit and flush icache
- * if necessary.
- *
- * set_pte() is also called by the kernel, but we can expect that the kernel
- * flushes icache explicitly if necessary.
- */
-#define pte_present_exec_user(pte)\
- ((pte_val(pte) & (_PAGE_P | _PAGE_PL_MASK | _PAGE_AR_RX)) == \
- (_PAGE_P | _PAGE_PL_3 | _PAGE_AR_RX))
-
-extern void __ia64_sync_icache_dcache(pte_t pteval);
-static inline void set_pte(pte_t *ptep, pte_t pteval)
-{
- /* page is present && page is user && page is executable
- * && (page swapin or new page or page migraton
- * || copy_on_write with page copying.)
- */
- if (pte_present_exec_user(pteval) &&
- (!pte_present(*ptep) ||
- pte_pfn(*ptep) != pte_pfn(pteval)))
- /* load_module() calles flush_icache_range() explicitly*/
- __ia64_sync_icache_dcache(pteval);
- *ptep = pteval;
-}
-
-#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
-
-/*
- * Make page protection values cacheable, uncacheable, or write-
- * combining. Note that "protection" is really a misnomer here as the
- * protection value contains the memory attribute bits, dirty bits, and
- * various other bits as well.
- */
-#define pgprot_cacheable(prot) __pgprot((pgprot_val(prot) & ~_PAGE_MA_MASK) | _PAGE_MA_WB)
-#define pgprot_noncached(prot) __pgprot((pgprot_val(prot) & ~_PAGE_MA_MASK) | _PAGE_MA_UC)
-#define pgprot_writecombine(prot) __pgprot((pgprot_val(prot) & ~_PAGE_MA_MASK) | _PAGE_MA_WC)
-
-struct file;
-extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
- unsigned long size, pgprot_t vma_prot);
-#define __HAVE_PHYS_MEM_ACCESS_PROT
-
-static inline unsigned long
-pgd_index (unsigned long address)
-{
- unsigned long region = address >> 61;
- unsigned long l1index = (address >> PGDIR_SHIFT) & ((PTRS_PER_PGD >> 3) - 1);
-
- return (region << (PAGE_SHIFT - 6)) | l1index;
-}
-
-/* The offset in the 1-level directory is given by the 3 region bits
- (61..63) and the level-1 bits. */
-static inline pgd_t*
-pgd_offset (const struct mm_struct *mm, unsigned long address)
-{
- return mm->pgd + pgd_index(address);
-}
-
-/* In the kernel's mapped region we completely ignore the region number
- (since we know it's in region number 5). */
-#define pgd_offset_k(addr) \
- (init_mm.pgd + (((addr) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1)))
-
-/* Look up a pgd entry in the gate area. On IA-64, the gate-area
- resides in the kernel-mapped segment, hence we use pgd_offset_k()
- here. */
-#define pgd_offset_gate(mm, addr) pgd_offset_k(addr)
-
-#ifdef CONFIG_PGTABLE_4
-/* Find an entry in the second-level page table.. */
-#define pud_offset(dir,addr) \
- ((pud_t *) pgd_page_vaddr(*(dir)) + (((addr) >> PUD_SHIFT) & (PTRS_PER_PUD - 1)))
-#endif
-
-/* Find an entry in the third-level page table.. */
-#define pmd_offset(dir,addr) \
- ((pmd_t *) pud_page_vaddr(*(dir)) + (((addr) >> PMD_SHIFT) & (PTRS_PER_PMD - 1)))
-
-/*
- * Find an entry in the third-level page table. This looks more complicated than it
- * should be because some platforms place page tables in high memory.
- */
-#define pte_index(addr) (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
-#define pte_offset_kernel(dir,addr) ((pte_t *) 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_map(dir, addr)
-#define pte_unmap(pte) do { } while (0)
-#define pte_unmap_nested(pte) do { } while (0)
-
-/* atomic versions of the some PTE manipulations: */
-
-static inline int
-ptep_test_and_clear_young (struct vm_area_struct *vma, unsigned long addr, pte_t *ptep)
-{
-#ifdef CONFIG_SMP
- if (!pte_young(*ptep))
- return 0;
- return test_and_clear_bit(_PAGE_A_BIT, ptep);
-#else
- pte_t pte = *ptep;
- if (!pte_young(pte))
- return 0;
- set_pte_at(vma->vm_mm, addr, ptep, pte_mkold(pte));
- return 1;
-#endif
-}
-
-static inline pte_t
-ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
-{
-#ifdef CONFIG_SMP
- return __pte(xchg((long *) ptep, 0));
-#else
- pte_t pte = *ptep;
- pte_clear(mm, addr, ptep);
- return pte;
-#endif
-}
-
-static inline void
-ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
-{
-#ifdef CONFIG_SMP
- unsigned long new, old;
-
- do {
- old = pte_val(*ptep);
- new = pte_val(pte_wrprotect(__pte (old)));
- } while (cmpxchg((unsigned long *) ptep, old, new) != old);
-#else
- pte_t old_pte = *ptep;
- set_pte_at(mm, addr, ptep, pte_wrprotect(old_pte));
-#endif
-}
-
-static inline int
-pte_same (pte_t a, pte_t b)
-{
- return pte_val(a) == pte_val(b);
-}
-
-#define update_mmu_cache(vma, address, pte) do { } while (0)
-
-extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
-extern void paging_init (void);
-
-/*
- * Note: The macros below rely on the fact that MAX_SWAPFILES_SHIFT <= number of
- * bits in the swap-type field of the swap pte. It would be nice to
- * enforce that, but we can't easily include <linux/swap.h> here.
- * (Of course, better still would be to define MAX_SWAPFILES_SHIFT here...).
- *
- * Format of swap pte:
- * bit 0 : present bit (must be zero)
- * bit 1 : _PAGE_FILE (must be zero)
- * bits 2- 8: swap-type
- * bits 9-62: swap offset
- * bit 63 : _PAGE_PROTNONE bit
- *
- * Format of file pte:
- * bit 0 : present bit (must be zero)
- * bit 1 : _PAGE_FILE (must be one)
- * bits 2-62: file_offset/PAGE_SIZE
- * bit 63 : _PAGE_PROTNONE bit
- */
-#define __swp_type(entry) (((entry).val >> 2) & 0x7f)
-#define __swp_offset(entry) (((entry).val << 1) >> 10)
-#define __swp_entry(type,offset) ((swp_entry_t) { ((type) << 2) | ((long) (offset) << 9) })
-#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
-#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
-
-#define PTE_FILE_MAX_BITS 61
-#define pte_to_pgoff(pte) ((pte_val(pte) << 1) >> 3)
-#define pgoff_to_pte(off) ((pte_t) { ((off) << 2) | _PAGE_FILE })
-
-#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
- remap_pfn_range(vma, vaddr, pfn, size, prot)
-
-/*
- * ZERO_PAGE is a global shared page that is always zero: used
- * for zero-mapped memory areas etc..
- */
-extern unsigned long empty_zero_page[PAGE_SIZE/sizeof(unsigned long)];
-extern struct page *zero_page_memmap_ptr;
-#define ZERO_PAGE(vaddr) (zero_page_memmap_ptr)
-
-/* We provide our own get_unmapped_area to cope with VA holes for userland */
-#define HAVE_ARCH_UNMAPPED_AREA
-
-#ifdef CONFIG_HUGETLB_PAGE
-#define HUGETLB_PGDIR_SHIFT (HPAGE_SHIFT + 2*(PAGE_SHIFT-3))
-#define HUGETLB_PGDIR_SIZE (__IA64_UL(1) << HUGETLB_PGDIR_SHIFT)
-#define HUGETLB_PGDIR_MASK (~(HUGETLB_PGDIR_SIZE-1))
-#endif
-
-
-#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
-/*
- * Update PTEP with ENTRY, which is guaranteed to be a less
- * restrictive PTE. That is, ENTRY may have the ACCESSED, DIRTY, and
- * WRITABLE bits turned on, when the value at PTEP did not. The
- * WRITABLE bit may only be turned if SAFELY_WRITABLE is TRUE.
- *
- * SAFELY_WRITABLE is TRUE if we can update the value at PTEP without
- * having to worry about races. On SMP machines, there are only two
- * cases where this is true:
- *
- * (1) *PTEP has the PRESENT bit turned OFF
- * (2) ENTRY has the DIRTY bit turned ON
- *
- * On ia64, we could implement this routine with a cmpxchg()-loop
- * which ORs in the _PAGE_A/_PAGE_D bit if they're set in ENTRY.
- * However, like on x86, we can get a more streamlined version by
- * observing that it is OK to drop ACCESSED bit updates when
- * SAFELY_WRITABLE is FALSE. Besides being rare, all that would do is
- * result in an extra Access-bit fault, which would then turn on the
- * ACCESSED bit in the low-level fault handler (iaccess_bit or
- * daccess_bit in ivt.S).
- */
-#ifdef CONFIG_SMP
-# define ptep_set_access_flags(__vma, __addr, __ptep, __entry, __safely_writable) \
-({ \
- int __changed = !pte_same(*(__ptep), __entry); \
- if (__changed && __safely_writable) { \
- set_pte(__ptep, __entry); \
- flush_tlb_page(__vma, __addr); \
- } \
- __changed; \
-})
-#else
-# define ptep_set_access_flags(__vma, __addr, __ptep, __entry, __safely_writable) \
-({ \
- int __changed = !pte_same(*(__ptep), __entry); \
- if (__changed) { \
- set_pte_at((__vma)->vm_mm, (__addr), __ptep, __entry); \
- flush_tlb_page(__vma, __addr); \
- } \
- __changed; \
-})
-#endif
-
-# ifdef CONFIG_VIRTUAL_MEM_MAP
- /* arch mem_map init routine is needed due to holes in a virtual mem_map */
-# define __HAVE_ARCH_MEMMAP_INIT
- extern void memmap_init (unsigned long size, int nid, unsigned long zone,
- unsigned long start_pfn);
-# endif /* CONFIG_VIRTUAL_MEM_MAP */
-# endif /* !__ASSEMBLY__ */
-
-/*
- * Identity-mapped regions use a large page size. We'll call such large pages
- * "granules". If you can think of a better name that's unambiguous, let me
- * know...
- */
-#if defined(CONFIG_IA64_GRANULE_64MB)
-# define IA64_GRANULE_SHIFT _PAGE_SIZE_64M
-#elif defined(CONFIG_IA64_GRANULE_16MB)
-# define IA64_GRANULE_SHIFT _PAGE_SIZE_16M
-#endif
-#define IA64_GRANULE_SIZE (1 << IA64_GRANULE_SHIFT)
-/*
- * log2() of the page size we use to map the kernel image (IA64_TR_KERNEL):
- */
-#define KERNEL_TR_PAGE_SHIFT _PAGE_SIZE_64M
-#define KERNEL_TR_PAGE_SIZE (1 << KERNEL_TR_PAGE_SHIFT)
-
-/*
- * No page table caches to initialise
- */
-#define pgtable_cache_init() do { } while (0)
-
-/* These tell get_user_pages() that the first gate page is accessible from user-level. */
-#define FIXADDR_USER_START GATE_ADDR
-#ifdef HAVE_BUGGY_SEGREL
-# define FIXADDR_USER_END (GATE_ADDR + 2*PAGE_SIZE)
-#else
-# define FIXADDR_USER_END (GATE_ADDR + 2*PERCPU_PAGE_SIZE)
-#endif
-
-#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
-#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
-#define __HAVE_ARCH_PTEP_SET_WRPROTECT
-#define __HAVE_ARCH_PTE_SAME
-#define __HAVE_ARCH_PGD_OFFSET_GATE
-
-
-#ifndef CONFIG_PGTABLE_4
-#include <asm-generic/pgtable-nopud.h>
-#endif
-#include <asm-generic/pgtable.h>
-
-#endif /* _ASM_IA64_PGTABLE_H */