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#ifndef _PPC_PAGE_H

#define _PPC_PAGE_H

/* PAGE_SHIFT determines the page size */

#define PAGE_SHIFT      12

#define PAGE_SIZE       (1UL << PAGE_SHIFT)

#define PAGE_MASK       (~(PAGE_SIZE-1))

void invalidate(void);

#ifdef __KERNEL__

#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

/*

 * .. 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

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

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

/* This handles the memory map.. */

#define KERNELBASE      0x90000000

#define PAGE_OFFSET     KERNELBASE

#define MAP_NR(addr)    ((((unsigned long)addr) - PAGE_OFFSET) >> PAGE_SHIFT)

#define MAP_PAGE_RESERVED       (1<<15)

#if 0  /* Now defined in "mm.h" */

/*

 * This used to be an unsigned short...

 *

 *                         -- Cort

 */

/*typedef unsigned short mem_map_t;*/

typedef struct {

        unsigned count:30,

                 dirty:1,

                 reserved:1;

} mem_map_t;

#endif

/* Certain architectures need to do special things when pte's

 * within a page table are directly modified.  Thus, the following

 * hook is made available.

 */

#define set_pte(pteptr, pteval) ((*(pteptr)) = (pteval))

#endif /* __KERNEL__ */

#endif /* _PPC_PAGE_H */