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