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