From a1df417e74aa6dae7352dc8cbb0ad471af5b7c69 Mon Sep 17 00:00:00 2001 From: "Michael J. Chudobiak" Date: Mon, 25 Apr 2016 10:00:44 -0400 Subject: initial Olimex linux tree from Daniel, originally Feb 3, 2016 --- linux/arch/m68k/include/asm/virtconvert.h | 43 +++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 linux/arch/m68k/include/asm/virtconvert.h (limited to 'linux/arch/m68k/include/asm/virtconvert.h') diff --git a/linux/arch/m68k/include/asm/virtconvert.h b/linux/arch/m68k/include/asm/virtconvert.h new file mode 100644 index 00000000..b8a82fb1 --- /dev/null +++ b/linux/arch/m68k/include/asm/virtconvert.h @@ -0,0 +1,43 @@ +#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. */ +#if defined(CONFIG_MMU) && defined(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 + +/* + * 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