#ifndef _ASM_M32R_PAGE_H
#define _ASM_M32R_PAGE_H

#include <linux/const.h>

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

#ifndef __ASSEMBLY__

extern void clear_page(void *to);
extern void copy_page(void *to, void *from);

#define clear_user_page(page, vaddr, pg) clear_page(page)
#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)

#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE

/*
* These are used to make use of C type-checking..
*/
typedef struct { unsigned long pte; } pte_t;
typedef struct { unsigned long pmd; } pmd_t;
typedef struct { unsigned long pgd; } pgd_t;
#define pte_val(x) ((x).pte)
#define PTE_MASK PAGE_MASK

typedef struct { unsigned long pgprot; } pgprot_t;
typedef struct page *pgtable_t;

#define pmd_val(x) ((x).pmd)
#define pgd_val(x) ((x).pgd)
#define pgprot_val(x) ((x).pgprot)

#define __pte(x) ((pte_t) { (x) } )
#define __pmd(x) ((pmd_t) { (x) } )
#define __pgd(x) ((pgd_t) { (x) } )
#define __pgprot(x) ((pgprot_t) { (x) } )

#endif /* !__ASSEMBLY__ */

/*
* This handles the memory map.. We could make this a config
* option, but too many people screw it up, and too few need
* it.
*
* A __PAGE_OFFSET of 0xC0000000 means that the kernel has
* a virtual address space of one gigabyte, which limits the
* amount of physical memory you can use to about 950MB.
*
* If you want more physical memory than this then see the CONFIG_HIGHMEM4G
* and CONFIG_HIGHMEM64G options in the kernel configuration.
*/

#define __MEMORY_START CONFIG_MEMORY_START
#define __MEMORY_SIZE CONFIG_MEMORY_SIZE

#ifdef CONFIG_MMU
#define __PAGE_OFFSET (0x80000000)
#else
#define __PAGE_OFFSET (0x00000000)
#endif

#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET)
#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET))

#ifndef CONFIG_DISCONTIGMEM
#define PFN_BASE (CONFIG_MEMORY_START >> PAGE_SHIFT)
#define ARCH_PFN_OFFSET PFN_BASE
#define pfn_valid(pfn) (((pfn) - PFN_BASE) < max_mapnr)
#endif /* !CONFIG_DISCONTIGMEM */

#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)

#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC )

#define devmem_is_allowed(x) 1

#include <asm-generic/memory_model.h>
#include <asm-generic/getorder.h>

#endif /* _ASM_M32R_PAGE_H */