mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-21 03:33:59 +08:00
46a82b2d55
One of the changes necessary for shared page tables is to standardize the pxx_page macros. pte_page and pmd_page have always returned the struct page associated with their entry, while pte_page_kernel and pmd_page_kernel have returned the kernel virtual address. pud_page and pgd_page, on the other hand, return the kernel virtual address. Shared page tables needs pud_page and pgd_page to return the actual page structures. There are very few actual users of these functions, so it is simple to standardize their usage. Since this is basic cleanup, I am submitting these changes as a standalone patch. Per Hugh Dickins' comments about it, I am also changing the pxx_page_kernel macros to pxx_page_vaddr to clarify their meaning. Signed-off-by: Dave McCracken <dmccr@us.ibm.com> Cc: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
/*
|
|
* 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))
|
|
|
|
#define pmd_page_vaddr(pmd) \
|
|
((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
|
|
|
|
/*
|
|
* Bits 0 through 3 are taken
|
|
*/
|
|
#define PTE_FILE_MAX_BITS 28
|
|
|
|
#define pte_to_pgoff(pte) (pte_val(pte) >> 4)
|
|
|
|
#define pgoff_to_pte(off) ((pte_t) { ((off) << 4) + _PAGE_FILE })
|
|
|
|
#endif
|