147 lines
3.5 KiB
C
147 lines
3.5 KiB
C
/*
|
|
* 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__ */
|