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#ifndef _PARISC_PAGE_H

#define _PARISC_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__

#ifndef __ASSEMBLY__

#include <asm/cache.h>

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

#define copy_page(to,from)      copy_user_page_asm((void *)(to), (void *)(from))

extern void purge_kernel_dcache_page(unsigned long);

extern void copy_user_page_asm(void *to, void *from);

extern void clear_user_page_asm(void *page, unsigned long vaddr);

static inline void

copy_user_page(void *to, void *from, unsigned long vaddr)

{

        copy_user_page_asm(to, from);

        flush_kernel_dcache_page(to);

}

static inline void

clear_user_page(void *page, unsigned long vaddr)

{

        purge_kernel_dcache_page((unsigned long)page);

        clear_user_page_asm(page, vaddr);

}

/*

 * 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) } )

/* Pure 2^n version of get_order */

extern __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;

}

#ifdef __LP64__

#define MAX_PHYSMEM_RANGES 8 /* Fix the size for now (current known max is 3) */

#else

#define MAX_PHYSMEM_RANGES 1 /* First range is only range that fits in 32 bits */

#endif

typedef struct __physmem_range {

        unsigned long start_pfn;

        unsigned long pages;       /* PAGE_SIZE pages */

} physmem_range_t;

extern physmem_range_t pmem_ranges[];

extern int npmem_ranges;

#endif /* !__ASSEMBLY__ */

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

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

/*

 * Tell the user there is some problem. Beep too, so we can

 * see^H^H^Hhear bugs in early bootup as well!

 *

 * We don't beep yet.  prumpf

 */

#define BUG() do { \

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

} while (0)

#define PAGE_BUG(page) do { \

        BUG(); \

} while (0)

#define LINUX_GATEWAY_SPACE     0

#define __PAGE_OFFSET           (0x10000000)

#define PAGE_OFFSET             ((unsigned long)__PAGE_OFFSET)

/* These macros don't work for 64-bit C code -- don't allow in C at all */

#ifdef __ASSEMBLY__

#   define PA(x)        ((x)-__PAGE_OFFSET)

#   define VA(x)        ((x)+__PAGE_OFFSET)

#endif

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

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

#ifndef CONFIG_DISCONTIGMEM

#define virt_to_page(kaddr)     (mem_map + (__pa(kaddr) >> PAGE_SHIFT))

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

#endif  /* !CONFIG_DISCONTIGMEM */

#define VM_DATA_DEFAULT_FLAGS   (VM_READ | VM_WRITE | VM_EXEC | \

                                 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)

#endif /* __KERNEL__ */

#endif /* _PARISC_PAGE_H */