d2912cb15b
Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
58 lines
1.3 KiB
C
58 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2015 Synopsys, Inc. (www.synopsys.com)
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*/
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#ifndef _ASM_HIGHMEM_H
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#define _ASM_HIGHMEM_H
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#ifdef CONFIG_HIGHMEM
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#include <uapi/asm/page.h>
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#include <asm/kmap_types.h>
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/* start after vmalloc area */
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#define FIXMAP_BASE (PAGE_OFFSET - FIXMAP_SIZE - PKMAP_SIZE)
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#define FIXMAP_SIZE PGDIR_SIZE /* only 1 PGD worth */
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#define KM_TYPE_NR ((FIXMAP_SIZE >> PAGE_SHIFT)/NR_CPUS)
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#define FIXMAP_ADDR(nr) (FIXMAP_BASE + ((nr) << PAGE_SHIFT))
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/* start after fixmap area */
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#define PKMAP_BASE (FIXMAP_BASE + FIXMAP_SIZE)
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#define PKMAP_SIZE PGDIR_SIZE
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#define LAST_PKMAP (PKMAP_SIZE >> PAGE_SHIFT)
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#define LAST_PKMAP_MASK (LAST_PKMAP - 1)
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#define PKMAP_ADDR(nr) (PKMAP_BASE + ((nr) << PAGE_SHIFT))
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#define PKMAP_NR(virt) (((virt) - PKMAP_BASE) >> PAGE_SHIFT)
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#define kmap_prot PAGE_KERNEL
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#include <asm/cacheflush.h>
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extern void *kmap(struct page *page);
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extern void *kmap_high(struct page *page);
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extern void *kmap_atomic(struct page *page);
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extern void __kunmap_atomic(void *kvaddr);
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extern void kunmap_high(struct page *page);
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extern void kmap_init(void);
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static inline void flush_cache_kmaps(void)
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{
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flush_cache_all();
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}
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static inline void kunmap(struct page *page)
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{
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BUG_ON(in_interrupt());
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if (!PageHighMem(page))
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return;
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kunmap_high(page);
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}
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#endif
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#endif
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