mirror of https://gitee.com/openkylin/linux.git
73 lines
2.1 KiB
C
73 lines
2.1 KiB
C
/*
|
|
* Copyright (C) 1999 Gerhard Wichert, Siemens AG
|
|
* Gerhard.Wichert@pdb.siemens.de
|
|
* Copyright 2010 Tilera Corporation. All Rights Reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation, version 2.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
|
|
* NON INFRINGEMENT. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* Used in CONFIG_HIGHMEM systems for memory pages which
|
|
* are not addressable by direct kernel virtual addresses.
|
|
*
|
|
*/
|
|
|
|
#ifndef _ASM_TILE_HIGHMEM_H
|
|
#define _ASM_TILE_HIGHMEM_H
|
|
|
|
#include <linux/interrupt.h>
|
|
#include <linux/threads.h>
|
|
#include <asm/tlbflush.h>
|
|
#include <asm/homecache.h>
|
|
|
|
/* declarations for highmem.c */
|
|
extern unsigned long highstart_pfn, highend_pfn;
|
|
|
|
extern pte_t *pkmap_page_table;
|
|
|
|
/*
|
|
* Ordering is:
|
|
*
|
|
* FIXADDR_TOP
|
|
* fixed_addresses
|
|
* FIXADDR_START
|
|
* temp fixed addresses
|
|
* FIXADDR_BOOT_START
|
|
* Persistent kmap area
|
|
* PKMAP_BASE
|
|
* VMALLOC_END
|
|
* Vmalloc area
|
|
* VMALLOC_START
|
|
* high_memory
|
|
*/
|
|
#define LAST_PKMAP_MASK (LAST_PKMAP-1)
|
|
#define PKMAP_NR(virt) ((virt-PKMAP_BASE) >> PAGE_SHIFT)
|
|
#define PKMAP_ADDR(nr) (PKMAP_BASE + ((nr) << PAGE_SHIFT))
|
|
|
|
void *kmap_high(struct page *page);
|
|
void kunmap_high(struct page *page);
|
|
void *kmap(struct page *page);
|
|
void kunmap(struct page *page);
|
|
void *kmap_fix_kpte(struct page *page, int finished);
|
|
|
|
/* This macro is used only in map_new_virtual() to map "page". */
|
|
#define kmap_prot page_to_kpgprot(page)
|
|
|
|
void *__kmap_atomic(struct page *page);
|
|
void __kunmap_atomic(void *kvaddr);
|
|
void *kmap_atomic_pfn(unsigned long pfn);
|
|
void *kmap_atomic_prot_pfn(unsigned long pfn, pgprot_t prot);
|
|
struct page *kmap_atomic_to_page(void *ptr);
|
|
void *kmap_atomic_prot(struct page *page, pgprot_t prot);
|
|
void kmap_atomic_fix_kpte(struct page *page, int finished);
|
|
|
|
#define flush_cache_kmaps() do { } while (0)
|
|
|
|
#endif /* _ASM_TILE_HIGHMEM_H */
|