| /* |
| * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) |
| * Copyright 2003 PathScale, Inc. |
| * Derived from include/asm-i386/pgtable.h |
| * Licensed under the GPL |
| */ |
| |
| #ifndef __UM_PGTABLE_2LEVEL_H |
| #define __UM_PGTABLE_2LEVEL_H |
| |
| #include <asm-generic/pgtable-nopmd.h> |
| |
| /* PGDIR_SHIFT determines what a third-level page table entry can map */ |
| |
| #define PGDIR_SHIFT 22 |
| #define PGDIR_SIZE (1UL << PGDIR_SHIFT) |
| #define PGDIR_MASK (~(PGDIR_SIZE-1)) |
| |
| /* |
| * entries per page directory level: the i386 is two-level, so |
| * we don't really have any PMD directory physically. |
| */ |
| #define PTRS_PER_PTE 1024 |
| #define USER_PTRS_PER_PGD ((TASK_SIZE + (PGDIR_SIZE - 1)) / PGDIR_SIZE) |
| #define PTRS_PER_PGD 1024 |
| #define FIRST_USER_ADDRESS 0 |
| |
| #define pte_ERROR(e) \ |
| printk("%s:%d: bad pte %p(%08lx).\n", __FILE__, __LINE__, &(e), \ |
| pte_val(e)) |
| #define pgd_ERROR(e) \ |
| printk("%s:%d: bad pgd %p(%08lx).\n", __FILE__, __LINE__, &(e), \ |
| pgd_val(e)) |
| |
| static inline int pgd_newpage(pgd_t pgd) { return 0; } |
| static inline void pgd_mkuptodate(pgd_t pgd) { } |
| |
| #define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval)) |
| |
| #define pte_pfn(x) phys_to_pfn(pte_val(x)) |
| #define pfn_pte(pfn, prot) __pte(pfn_to_phys(pfn) | pgprot_val(prot)) |
| #define pfn_pmd(pfn, prot) __pmd(pfn_to_phys(pfn) | pgprot_val(prot)) |
| |
| /* |
| * Bits 0 through 4 are taken |
| */ |
| #define PTE_FILE_MAX_BITS 27 |
| |
| #define pte_to_pgoff(pte) (pte_val(pte) >> 5) |
| |
| #define pgoff_to_pte(off) ((pte_t) { ((off) << 5) + _PAGE_FILE }) |
| |
| #endif |