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#ifndef _OR32_PAGE_H

#define _OR32_PAGE_H

#include <linux/config.h>

/* PAGE_SHIFT determines the page size */

#define PAGE_SHIFT              13

#define PAGE_SIZE               (1UL << PAGE_SHIFT)

#define PAGE_MASK               (~(PAGE_SIZE-1))

#define PAGE_ALIGN(addr)        (((addr)+PAGE_SIZE-1)&PAGE_MASK)

#define PAGE_OFFSET             0xc0000000      

#define KERNELBASE              PAGE_OFFSET

#ifdef __KERNEL__

#ifndef __ASSEMBLY__

#define clear_page(page)        memset((void *)(page), 0, PAGE_SIZE)

#define copy_page(to,from)      memcpy((void *)(to), (void *)(from), PAGE_SIZE)

#define clear_user_page(page, vaddr)    clear_page(page)

#define copy_user_page(to, from, vaddr) copy_page(to, from)

#define STRICT_MM_TYPECHECKS

#ifdef STRICT_MM_TYPECHECKS

/*

 * 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;

typedef struct { unsigned long pgprot; } pgprot_t;

#define pte_val(x)      ((x).pte)

#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) } )

#else /* STRICT_MM_TYPECHECKS */

/*

 * .. 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)

#endif /* STRICT_MM_TYPECHECKS */

#define BUG() do { \

  printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \

} while (0)

#define PAGE_BUG(page) do { \

         BUG(); \

} while (0)

/* Pure 2^n version of get_order */

static __inline__ int get_order(unsigned long size)

{

        int order;

        size = (size-1) >> (PAGE_SHIFT-1);

        order = -1;

        do {

                size >>= 1;

                order++;

        } while (size);

        return order;

}

/* macros to convert between really physical and virtual addresses

 */

#define __pa(x)                 ((unsigned long)(x) - PAGE_OFFSET)

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

#define virt_to_page(kaddr)    (mem_map + (((unsigned long)kaddr - PAGE_OFFSET) >> PAGE_SHIFT))

#define VALID_PAGE(page)       ((page - mem_map) < max_mapnr)

/* from linker script */

extern unsigned long dram_start, dram_end;

#endif /* __ASSEMBLY__ */

#define VM_DATA_DEFAULT_FLAGS   (VM_READ | VM_WRITE | VM_EXEC | \

                                 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)

#endif /* __KERNEL__ */

#endif /* _OR32_PAGE_H */