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#ifndef __ASM_MIPS_PAGE_H

#define __ASM_MIPS_PAGE_H

/* PAGE_SHIFT determines the page size */

#define PAGE_SHIFT      12

#define PAGE_SIZE       (1UL << PAGE_SHIFT)

#define PAGE_MASK       (~(PAGE_SIZE-1))

#ifdef __KERNEL__

#define STRICT_MM_TYPECHECKS

#ifndef __LANGUAGE_ASSEMBLY__

#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 __pme(x)        ((pme_t) { (x) } )

#define __pgd(x)        ((pgd_t) { (x) } )

#define __pgprot(x)     ((pgprot_t) { (x) } )

#else /* !defined (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 /* !defined (STRICT_MM_TYPECHECKS) */

/*

 * We need a special version of copy_page that can handle virtual caches.

 * While we're at tweaking with caches we can use that to make it even

 * faster.  The R10000 accelerated caching mode will further accelerate it.

 */

extern void __copy_page(unsigned long from, unsigned long to);

#define copy_page(from,to) __copy_page((unsigned long)from, (unsigned long)to)

#endif /* __LANGUAGE_ASSEMBLY__ */

/* to align the pointer to the (next) page boundary */

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

/* This handles the memory map */

#if __mips == 3

/*

 * We handle pages at XKPHYS + 0x1800000000000000 (cachable, noncoherent)

 * Pagetables are at  XKPHYS + 0x1000000000000000 (uncached)

 */

#define PAGE_OFFSET     0x9800000000000000UL

#define PT_OFFSET       0x9000000000000000UL

#define MAP_MASK        0x07ffffffffffffffUL

#else

/*

 * We handle pages at KSEG0 (cachable, noncoherent)

 * Pagetables are at  KSEG1 (uncached)

 */

#define PAGE_OFFSET     0x80000000

#define PT_OFFSET       0xa0000000

#define MAP_MASK        0x1fffffff

#endif

#define MAP_NR(addr)    ((((unsigned long)(addr)) & MAP_MASK) >> PAGE_SHIFT)

#ifndef __LANGUAGE_ASSEMBLY__

extern unsigned long page_colour_mask;

extern inline unsigned long

page_colour(unsigned long page)

{

        return page & page_colour_mask;

}

#endif /* defined (__LANGUAGE_ASSEMBLY__) */

#endif /* defined (__KERNEL__) */

#endif /* __ASM_MIPS_PAGE_H */