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c5c3238d9b
page_to_phys is duplicated by all architectures, and from some strange reason placed in <asm/io.h> where it doesn't fit at all. phys_to_page is only provided by a few architectures despite having a lot of open coded users. Provide generic versions in <asm-generic/memory_model.h> to make these helpers more easily usable. Note with this patch powerpc loses the CONFIG_DEBUG_VIRTUAL pfn_valid check. It will be added back in a generic version later. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
40 lines
815 B
C
40 lines
815 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __VIRT_CONVERT__
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#define __VIRT_CONVERT__
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/*
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* Macros used for converting between virtual and physical mappings.
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*/
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#ifdef __KERNEL__
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#include <linux/compiler.h>
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#include <linux/mmzone.h>
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#include <asm/setup.h>
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#include <asm/page.h>
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/*
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* Change virtual addresses to physical addresses and vv.
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*/
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#define virt_to_phys virt_to_phys
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static inline unsigned long virt_to_phys(void *address)
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{
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return __pa(address);
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}
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#define phys_to_virt phys_to_virt
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static inline void *phys_to_virt(unsigned long address)
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{
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return __va(address);
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}
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/*
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* IO bus memory addresses are 1:1 with the physical address,
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* deprecated globally but still used on two machines.
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*/
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#if defined(CONFIG_AMIGA) || defined(CONFIG_VME)
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#define virt_to_bus virt_to_phys
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#endif
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#endif
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#endif
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