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TOMOYO Linux Cross Reference
Linux/arch/powerpc/boot/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 */
 35 

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