From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- arch/m68k/include/asm/virtconvert.h | 46 +++++++++++++++++++++++++++++++++++++ 1 file changed, 46 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 000000000..dfe43083b --- /dev/null +++ b/arch/m68k/include/asm/virtconvert.h @@ -0,0 +1,46 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#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. + */ +#define virt_to_phys virt_to_phys +static inline unsigned long virt_to_phys(void *address) +{ + return __pa(address); +} + +#define phys_to_virt phys_to_virt +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 v1.2.3