/*
 *  linux/include/asm-armnommu/pgtable.h
 *
 *  Copyright (C) 1995-2002 Russell King
 *  Modified by Hyok S. Choi, 2004, Samsung Electronics Co.,Ltd.
 *  (referenced from m68knommu)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#ifndef _ASMARM_PGTABLE_NOMMU_H
#define _ASMARM_PGTABLE_NOMMU_H

#ifndef __ASSEMBLY__


#include <linux/config.h>
#include <linux/slab.h>
#include <asm/processor.h>
#include <asm/page.h>
#include <asm/io.h>


/*
 * Trivial page table functions.
 */
#define pgd_present(pgd)	(1)
#define pgd_none(pgd)		(0)
#define pgd_bad(pgd)		(0)
#define pgd_clear(pgdp)
#define kern_addr_valid(addr)	(1)
#define	pmd_offset(a, b)	((void *)0)

/* FIXME */
/*
 * PMD_SHIFT determines the size of the area a second-level page table can map
 * PGDIR_SHIFT determines what a third-level page table entry can map
 */
#define PGDIR_SHIFT		21

#define PGDIR_SIZE		(1UL << PGDIR_SHIFT)
#define PGDIR_MASK		(~(PGDIR_SIZE-1))
/* FIXME */

#define PAGE_NONE	__pgprot(0)
#define PAGE_SHARED	__pgprot(0)
#define PAGE_COPY	__pgprot(0)
#define PAGE_READONLY	__pgprot(0)
#define PAGE_KERNEL	__pgprot(0)

//extern void paging_init(struct meminfo *, struct machine_desc *);
#define swapper_pg_dir ((pgd_t *) 0)

#define __swp_type(x)		(0)
#define __swp_offset(x)		(0)
#define __swp_entry(typ,off)	((swp_entry_t) { ((typ) | ((off) << 7)) })
#define __pte_to_swp_entry(pte)	((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x)	((pte_t) { (x).val })


typedef pte_t *pte_addr_t;

static inline int pte_file(pte_t pte) { return 0; }

/*
 * ZERO_PAGE is a global shared page that is always zero: used
 * for zero-mapped memory areas etc..
 */
#define ZERO_PAGE(vaddr)	(virt_to_page(0))

/*
 * Mark the prot value as uncacheable and unbufferable.
 */
#define pgprot_noncached(prot)	__pgprot(0)
#define pgprot_writecombine(prot) __pgprot(0)


/*
 * These would be in other places but having them here reduces the diffs.
 */
extern unsigned int kobjsize(const void *objp);
extern int is_in_rom(unsigned long);

/*
 * No page table caches to initialise.
 */
#define pgtable_cache_init()	do { } while (0)
#define io_remap_page_range	remap_page_range
#define io_remap_pfn_range	remap_pfn_range

#define MK_IOSPACE_PFN(space, pfn)	(pfn)
#define GET_IOSPACE(pfn)		0
#define GET_PFN(pfn)			(pfn)


/*
 * All 32bit addresses are effectively valid for vmalloc...
 * Sort of meaningless for non-VM targets.
 */
#define	VMALLOC_START	0
#define	VMALLOC_END	0xffffffff

#define FIRST_USER_ADDRESS      (0)


#ifdef CONFIG_ARCH_NDS
extern unsigned long get_fb_unmapped_area(struct file *filp, unsigned long,
                                          unsigned long, unsigned long,
                                          unsigned long);
#define HAVE_ARCH_FB_UNMAPPED_AREA

#endif

#endif /*__ASSEMBLY__*/

#endif /* _ASMARM_PGTABLE_H */