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#ifndef __ASM_SH64_PAGE_H

#define __ASM_SH64_PAGE_H

/*

 * This file is subject to the terms and conditions of the GNU General Public

 * License.  See the file "COPYING" in the main directory of this archive

 * for more details.

 *

 * include/asm-sh64/page.h

 *

 * Copyright (C) 2000, 2001  Paolo Alberelli

 * Copyright (C) 2003  Paul Mundt

 *

 * benedict.gaster@superh.com 19th, 24th July 2002.

 *

 * Modified to take account of enabling for D-CACHE support.

 *

 */

#include <linux/config.h>

/* PAGE_SHIFT determines the page size */

#define PAGE_SHIFT      12

#ifdef __ASSEMBLY__

#define PAGE_SIZE       4096

#else

#define PAGE_SIZE       (1UL << PAGE_SHIFT)

#endif

#define PAGE_MASK       (~(PAGE_SIZE-1))

#define PTE_MASK        PAGE_MASK

#ifdef __KERNEL__

#ifndef __ASSEMBLY__

extern void sh64_page_clear(void *page);

extern void sh64_page_copy(void *from, void *to);

#define clear_page(page)                sh64_page_clear(page)

#define copy_page(to,from)              sh64_page_copy(from, to)

#if defined(CONFIG_DCACHE_DISABLED)

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

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

#else

extern void clear_user_page(void *to, unsigned long address);

extern void copy_user_page(void *to, void *from, unsigned long address);

#endif /* defined(CONFIG_DCACHE_DISABLED) */

/*

 * These are used to make use of C type-checking..

 */

typedef struct { unsigned long 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) } )

#endif /* !__ASSEMBLY__ */

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

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

/*

 * config.in defined.

 */

#define __MEMORY_START          (CONFIG_MEMORY_START)

#define PAGE_OFFSET             (CONFIG_CACHED_MEMORY_OFFSET)

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

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

#define MAP_NR(addr)            ((__pa(addr)-__MEMORY_START) >> PAGE_SHIFT)

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

#define phys_to_page(phys)      (mem_map + (((phys)-__MEMORY_START) >> PAGE_SHIFT))

#define virt_to_page(kaddr)  (mem_map + MAP_NR(kaddr))

#define page_to_phys(page)      (((page - mem_map) << PAGE_SHIFT) + __MEMORY_START)

#ifndef __ASSEMBLY__

/*

 * Tell the user there is some problem.

 */

#define BUG() do { \

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

        asm volatile("nop"); \

} while (0)

#define PAGE_BUG(page) do { \

        BUG(); \

} while (0)

/* 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;

}

#define VM_DATA_DEFAULT_FLAGS   (VM_READ | VM_WRITE | VM_EXEC | \

                                 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)

#endif

#endif /* __KERNEL__ */

#endif /* __ASM_SH64_PAGE_H */