38a6f42669
This change makes KM_TYPE_NR independent of the actual deprecated list of km_type values, which are no longer used in tile code anywhere. For now we leave it set to 8, allowing that many nested mappings, and thus reserving 32MB of address space. A few remaining places using KM_* values were cleaned up as well. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
73 lines
2.1 KiB
C
73 lines
2.1 KiB
C
/*
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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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