From 8e4bff4cab0ddac6060645b0715210484d02ff40 Mon Sep 17 00:00:00 2001 From: Yuval Adam <_@yuv.al> Date: Wed, 30 Aug 2017 08:25:59 +0000 Subject: Initial file dump from open source release --- arch/m68k/include/asm/virtconvert.h | 47 +++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 arch/m68k/include/asm/virtconvert.h (limited to 'arch/m68k/include/asm/virtconvert.h') diff --git a/arch/m68k/include/asm/virtconvert.h b/arch/m68k/include/asm/virtconvert.h new file mode 100644 index 00000000..f35229b8 --- /dev/null +++ b/arch/m68k/include/asm/virtconvert.h @@ -0,0 +1,47 @@ +#ifndef __VIRT_CONVERT__ +#define __VIRT_CONVERT__ + +/* + * Macros used for converting between virtual and physical mappings. + */ + +#ifdef __KERNEL__ + +#include +#include +#include +#include + +/* + * Change virtual addresses to physical addresses and vv. + */ +static inline unsigned long virt_to_phys(void *address) +{ + return __pa(address); +} + +static inline void *phys_to_virt(unsigned long address) +{ + return __va(address); +} + +/* Permanent address of a page. */ +#ifdef CONFIG_MMU +#ifdef CONFIG_SINGLE_MEMORY_CHUNK +#define page_to_phys(page) \ + __pa(PAGE_OFFSET + (((page) - pg_data_map[0].node_mem_map) << PAGE_SHIFT)) +#else +#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) +#endif +#else +#define page_to_phys(page) (((page) - mem_map) << PAGE_SHIFT) +#endif + +/* + * IO bus memory addresses are 1:1 with the physical address, + */ +#define virt_to_bus virt_to_phys +#define bus_to_virt phys_to_virt + +#endif +#endif -- cgit v1.3.1