47 lines
1,015 B
C
47 lines
1,015 B
C
|
/* SPDX-License-Identifier: GPL-2.0 */
|
||
|
|
#ifndef __VIRT_CONVERT__
|
||
|
|
#define __VIRT_CONVERT__
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Macros used for converting between virtual and physical mappings.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifdef __KERNEL__
|
||
|
|
|
||
|
|
#include <linux/compiler.h>
|
||
|
|
#include <linux/mmzone.h>
|
||
|
|
#include <asm/setup.h>
|
||
|
|
#include <asm/page.h>
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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
|