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/arch/powerpc/boot/page.h

http://github.com/mirrors/linux
C Header | 30 lines | 16 code | 6 blank | 8 comment | 0 complexity | d2eb7b614341afe948a9d9963c80150f MD5 | raw file
 1/* SPDX-License-Identifier: GPL-2.0-or-later */
 2#ifndef _PPC_BOOT_PAGE_H
 3#define _PPC_BOOT_PAGE_H
 4/*
 5 * Copyright (C) 2001 PPC64 Team, IBM Corp
 6 */
 7
 8#ifdef __ASSEMBLY__
 9#define ASM_CONST(x) x
10#else
11#define __ASM_CONST(x) x##UL
12#define ASM_CONST(x) __ASM_CONST(x)
13#endif
14
15/* PAGE_SHIFT determines the page size */
16#define PAGE_SHIFT	12
17#define PAGE_SIZE	(ASM_CONST(1) << PAGE_SHIFT)
18#define PAGE_MASK	(~(PAGE_SIZE-1))
19
20/* align addr on a size boundary - adjust address up/down if needed */
21#define _ALIGN_UP(addr, size)	(((addr)+((size)-1))&(~((typeof(addr))(size)-1)))
22#define _ALIGN_DOWN(addr, size)	((addr)&(~((typeof(addr))(size)-1)))
23
24/* align addr on a size boundary - adjust address up if needed */
25#define _ALIGN(addr,size)     _ALIGN_UP(addr,size)
26
27/* to align the pointer to the (next) page boundary */
28#define PAGE_ALIGN(addr)	_ALIGN(addr, PAGE_SIZE)
29
30#endif				/* _PPC_BOOT_PAGE_H */