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/*
* page.h
*
* PowerPC memory management structures
*
* It is a stripped down version of linux ppc file...
*
* Copyright (C) 1999 Eric Valette (valette@crf.canon.fr)
* Canon Centre Recherche France.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* $Id$
*/
#ifndef _LIBCPU_PAGE_H
#define _LIBCPU_PAGE_H
/* PAGE_SHIFT determines the page size */
#define PAGE_SHIFT 12
#define PAGE_SIZE (1UL << PAGE_SHIFT)
#define PAGE_MASK (~(PAGE_SIZE-1))
#define PAGE_OFFSET 0xc0000000
#ifndef ASM
/*
* .. while these make it easier on the compiler
*/
typedef unsigned long pte_t;
typedef unsigned long pmd_t;
typedef unsigned long pgd_t;
typedef unsigned long pgprot_t;
#define pte_val(x) (x)
#define pmd_val(x) (x)
#define pgd_val(x) (x)
#define pgprot_val(x) (x)
#define __pte(x) (x)
#define __pmd(x) (x)
#define __pgd(x) (x)
#define __pgprot(x) (x)
/* align addr on a size boundry - adjust address up if needed -- Cort */
#define _ALIGN(addr,size) (((addr)+size-1)&(~(size-1)))
/* to align the pointer to the (next) page boundary */
#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
#define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE)
/* map phys->virtual and virtual->phys for RAM pages */
#define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
#define MAP_NR(addr) (((unsigned long)addr-PAGE_OFFSET) >> PAGE_SHIFT)
#define MAP_PAGE_RESERVED (1<<15)
extern unsigned long get_zero_page_fast(void);
#endif /* ASM */
#endif /* _LIBCPU_PAGE_H */
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