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Diffstat (limited to 'include/asm-ia64/pgtable.h')
| -rw-r--r-- | include/asm-ia64/pgtable.h | 615 |
1 files changed, 0 insertions, 615 deletions
diff --git a/include/asm-ia64/pgtable.h b/include/asm-ia64/pgtable.h deleted file mode 100644 index 7a9bff4..0000000 --- a/include/asm-ia64/pgtable.h +++ /dev/null @@ -1,615 +0,0 @@ -#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 */ |