Linux Kernel  3.7.1
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page.h
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1 #ifndef _PPC_BOOT_PAGE_H
2 #define _PPC_BOOT_PAGE_H
3 /*
4  * Copyright (C) 2001 PPC64 Team, IBM Corp
5  *
6  * This program is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU General Public License
8  * as published by the Free Software Foundation; either version
9  * 2 of the License, or (at your option) any later version.
10  */
11 
12 #ifdef __ASSEMBLY__
13 #define ASM_CONST(x) x
14 #else
15 #define __ASM_CONST(x) x##UL
16 #define ASM_CONST(x) __ASM_CONST(x)
17 #endif
18 
19 /* PAGE_SHIFT determines the page size */
20 #define PAGE_SHIFT 12
21 #define PAGE_SIZE (ASM_CONST(1) << PAGE_SHIFT)
22 #define PAGE_MASK (~(PAGE_SIZE-1))
23 
24 /* align addr on a size boundary - adjust address up/down if needed */
25 #define _ALIGN_UP(addr,size) (((addr)+((size)-1))&(~((size)-1)))
26 #define _ALIGN_DOWN(addr,size) ((addr)&(~((size)-1)))
27 
28 /* align addr on a size boundary - adjust address up if needed */
29 #define _ALIGN(addr,size) _ALIGN_UP(addr,size)
30 
31 /* to align the pointer to the (next) page boundary */
32 #define PAGE_ALIGN(addr) _ALIGN(addr, PAGE_SIZE)
33 
34 #endif /* _PPC_BOOT_PAGE_H */