Edit File: pgtable_32.h
#ifndef _ASM_X86_PGTABLE_32_H #define _ASM_X86_PGTABLE_32_H #include <asm/pgtable_32_types.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> #include <asm/paravirt.h> #include <linux/bitops.h> #include <linux/list.h> #include <linux/spinlock.h> #include <asm/mm_track.h> struct mm_struct; struct vm_area_struct; extern pgd_t swapper_pg_dir[1024]; extern pgd_t initial_page_table[1024]; static inline void pgtable_cache_init(void) { } static inline void check_pgt_cache(void) { } void paging_init(void); extern void set_pmd_pfn(unsigned long, unsigned long, pgprot_t); /* * 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 #ifdef CONFIG_X86_PAE # include <asm/pgtable-3level.h> #else # include <asm/pgtable-2level.h> #endif #if defined(CONFIG_HIGHPTE) #define pte_offset_map(dir, address) \ ((pte_t *)kmap_atomic(pmd_page(*(dir))) + \ pte_index((address))) #define pte_unmap(pte) kunmap_atomic((pte)) #else #define pte_offset_map(dir, address) \ ((pte_t *)page_address(pmd_page(*(dir))) + pte_index((address))) #define pte_unmap(pte) do { } while (0) #endif /* Clear a kernel PTE and flush it from the TLB */ #define kpte_clear_flush(ptep, vaddr) \ do { \ pte_clear(&init_mm, (vaddr), (ptep)); \ __flush_tlb_one((vaddr)); \ } while (0) #endif /* !__ASSEMBLY__ */ /* * kern_addr_valid() is (1) for FLATMEM and (0) for * SPARSEMEM and DISCONTIGMEM */ #ifdef CONFIG_FLATMEM #define kern_addr_valid(addr) (1) #else #define kern_addr_valid(kaddr) (0) #endif #endif /* _ASM_X86_PGTABLE_32_H */