xref: /OK3568_Linux_fs/kernel/arch/um/include/shared/mem.h (revision 4882a59341e53eb6f0b4789bf948001014eff981) 
1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun  * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
4*4882a593Smuzhiyun  */
5*4882a593Smuzhiyun 
6*4882a593Smuzhiyun #ifndef __MEM_H__
7*4882a593Smuzhiyun #define __MEM_H__
8*4882a593Smuzhiyun 
9*4882a593Smuzhiyun extern int phys_mapping(unsigned long phys, unsigned long long *offset_out);
10*4882a593Smuzhiyun 
11*4882a593Smuzhiyun extern unsigned long uml_physmem;
to_phys(void * virt)12*4882a593Smuzhiyun static inline unsigned long to_phys(void *virt)
13*4882a593Smuzhiyun {
14*4882a593Smuzhiyun 	return(((unsigned long) virt) - uml_physmem);
15*4882a593Smuzhiyun }
16*4882a593Smuzhiyun 
to_virt(unsigned long phys)17*4882a593Smuzhiyun static inline void *to_virt(unsigned long phys)
18*4882a593Smuzhiyun {
19*4882a593Smuzhiyun 	return((void *) uml_physmem + phys);
20*4882a593Smuzhiyun }
21*4882a593Smuzhiyun 
22*4882a593Smuzhiyun #endif
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