forked from Minki/linux
f8f3304856
The non-MMU and ColdFire IO access functions will be moving to using the asm-generic/io.h in the near future. To make that possible we need define guards around the m68k specific virt_to_phys() and phys_to_virt() functions. Signed-off-by: Greg Ungerer <gerg@linux-m68k.org> Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org> Reviewed-by: Angelo Dureghello <angelo@sysam.it> Tested-by: Angelo Dureghello <angelo@sysam.it>
47 lines
1015 B
C
47 lines
1015 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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/* Permanent address of a page. */
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#if defined(CONFIG_MMU) && defined(CONFIG_SINGLE_MEMORY_CHUNK)
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#define page_to_phys(page) \
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__pa(PAGE_OFFSET + (((page) - pg_data_map[0].node_mem_map) << PAGE_SHIFT))
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#else
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#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
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#endif
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/*
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* IO bus memory addresses are 1:1 with the physical address,
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*/
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#define virt_to_bus virt_to_phys
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#define bus_to_virt phys_to_virt
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#endif
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#endif
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