page.h

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#ifndef _PPC_BOOT_PAGE_H
#define _PPC_BOOT_PAGE_H
/*
 * Copyright (C) 2001 PPC64 Team, IBM Corp
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

#ifdef __ASSEMBLY__
#define ASM_CONST(x) x
#else
#define __ASM_CONST(x) x##UL
#define ASM_CONST(x) __ASM_CONST(x)
#endif

/* PAGE_SHIFT determines the page size */
#define PAGE_SHIFT  12
#define PAGE_SIZE   (ASM_CONST(1) << PAGE_SHIFT)
#define PAGE_MASK   (~(PAGE_SIZE-1))

/* align addr on a size boundary - adjust address up/down if needed */
#define _ALIGN_UP(addr,size)    (((addr)+((size)-1))&(~((size)-1)))
#define _ALIGN_DOWN(addr,size)  ((addr)&(~((size)-1)))

/* align addr on a size boundary - adjust address up if needed */
#define _ALIGN(addr,size)     _ALIGN_UP(addr,size)

/* to align the pointer to the (next) page boundary */
#define PAGE_ALIGN(addr)    _ALIGN(addr, PAGE_SIZE)

#endif              /* _PPC_BOOT_PAGE_H */