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/*
* include/asm-v850/page.h -- VM ops
*
* Copyright (C) 2001,02,03 NEC Electronics Corporation
* Copyright (C) 2001,02,03 Miles Bader <miles@gnu.org>
*
* 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.
*
* Written by Miles Bader <miles@gnu.org>
*/
#ifndef __V850_PAGE_H__
#define __V850_PAGE_H__
#include <asm/machdep.h>
#define PAGE_SHIFT 12
#define PAGE_SIZE (1UL << PAGE_SHIFT)
#define PAGE_MASK (~(PAGE_SIZE-1))
/*
* PAGE_OFFSET -- the first address of the first page of memory. For archs with
* no MMU this corresponds to the first free page in physical memory (aligned
* on a page boundary).
*/
#ifndef PAGE_OFFSET
#define PAGE_OFFSET 0x0000000
#endif
#ifdef __KERNEL__
#ifndef __ASSEMBLY__
#define STRICT_MM_TYPECHECKS
#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(addr, vaddr, page) \
do { clear_page(addr); \
flush_dcache_page(page); \
} while (0)
#define copy_user_page(to, from, vaddr, page) \
do { copy_page(to, from); \
flush_dcache_page(page); \
} while (0)
#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 */
#endif /* !__ASSEMBLY__ */
/* to align the pointer to the (next) page boundary */
#define PAGE_ALIGN(addr) (((addr) + PAGE_SIZE - 1) & PAGE_MASK)
#ifndef __ASSEMBLY__
/* 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;
}
#endif /* !__ASSEMBLY__ */
/* No current v850 processor has virtual memory. */
#define __virt_to_phys(addr) (addr)
#define __phys_to_virt(addr) (addr)
#define virt_to_pfn(kaddr) (__virt_to_phys (kaddr) >> PAGE_SHIFT)
#define pfn_to_virt(pfn) __phys_to_virt ((pfn) << PAGE_SHIFT)
#define MAP_NR(kaddr) \
(((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT)
#define virt_to_page(kaddr) (mem_map + MAP_NR (kaddr))
#define page_to_virt(page) \
((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
#define pfn_to_page(pfn) virt_to_page (pfn_to_virt (pfn))
#define page_to_pfn(page) virt_to_pfn (page_to_virt (page))
#define virt_addr_valid(kaddr) \
(((void *)(kaddr) >= (void *)PAGE_OFFSET) && MAP_NR (kaddr) < max_mapnr)
#define __pa(x) __virt_to_phys ((unsigned long)(x))
#define __va(x) ((void *)__phys_to_virt ((unsigned long)(x)))
#endif /* KERNEL */
#endif /* __V850_PAGE_H__ */
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