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/*
* barebox - page.h
*
* Copyright (c) 2005 blackfin.uclinux.org
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#ifndef _BLACKFIN_PAGE_H
#define _BLACKFIN_PAGE_H
/* PAGE_SHIFT determines the page size */
#define PAGE_SHIFT (12)
#define PAGE_SIZE (4096)
#define PAGE_MASK (~(PAGE_SIZE-1))
#ifdef __KERNEL__
#include <asm/setup.h>
#if PAGE_SHIFT < 13
#define KTHREAD_SIZE (8192)
#else
#define KTHREAD_SIZE PAGE_SIZE
#endif
#ifndef __ASSEMBLY__
#define get_user_page(vaddr) __get_free_page(GFP_KERNEL)
#define free_user_page(page, addr) free_page(addr)
#define clear_page(page) memset((page), 0, PAGE_SIZE)
#define copy_page(to,from) memcpy((to), (from), PAGE_SIZE)
#define clear_user_page(page, vaddr) clear_page(page)
#define copy_user_page(to, from, vaddr) copy_page(to, from)
/*
* These are used to make use of C type-checking..
*/
typedef struct {
unsigned long pte;
} pte_t;
typedef struct {
unsigned long pmd[16];
} 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[0])
#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) } )
/* to align the pointer to the (next) page boundary */
#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
/* 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__ */
#include <asm/page_offset.h>
#define PAGE_OFFSET (PAGE_OFFSET_RAW)
#ifndef __ASSEMBLY__
#define __pa(vaddr) virt_to_phys((void *)vaddr)
#define __va(paddr) phys_to_virt((unsigned long)paddr)
#define MAP_NR(addr) (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT)
#define virt_to_page(addr) (mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
#define VALID_PAGE(page) ((page - mem_map) < max_mapnr)
#define PAGE_BUG(page) do { \
BUG(); \
} while (0)
#endif
#endif
#endif
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