mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-20 11:43:22 +00:00
128 lines
3 KiB
C
128 lines
3 KiB
C
/*
|
|
* U-boot - 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
|
|
|
|
#include <linux/config.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 BUG() do { \
|
|
\
|
|
while (1); /* dead-loop */ \
|
|
} while (0)
|
|
|
|
#define PAGE_BUG(page) do { \
|
|
BUG(); \
|
|
} while (0)
|
|
|
|
#endif
|
|
|
|
#endif
|
|
|
|
#endif
|