101 lines
2.6 KiB
C
101 lines
2.6 KiB
C
|
/*
|
||
|
|
* Copyright (C) 2011 Tobias Klauser <tklauser@distanz.ch>
|
||
|
|
* Copyright (C) 2004 Microtronix Datacom Ltd.
|
||
|
|
*
|
||
|
|
* MMU support based on asm/page.h from mips which is:
|
||
|
|
*
|
||
|
|
* Copyright (C) 1994 - 1999, 2000, 03 Ralf Baechle
|
||
|
|
* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
|
||
|
|
*
|
||
|
|
* 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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _ASM_NIOS2_PAGE_H
|
||
|
|
#define _ASM_NIOS2_PAGE_H
|
||
|
|
|
||
|
|
#include <linux/pfn.h>
|
||
|
|
#include <linux/const.h>
|
||
|
|
|
||
|
|
/*
|
||
|
|
* PAGE_SHIFT determines the page size
|
||
|
|
*/
|
||
|
|
#define PAGE_SHIFT 12
|
||
|
|
#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
|
||
|
|
#define PAGE_MASK (~(PAGE_SIZE - 1))
|
||
|
|
|
||
|
|
/*
|
||
|
|
* PAGE_OFFSET -- the first address of the first page of memory.
|
||
|
|
*/
|
||
|
|
#define PAGE_OFFSET \
|
||
|
|
(CONFIG_NIOS2_MEM_BASE + CONFIG_NIOS2_KERNEL_REGION_BASE)
|
||
|
|
|
||
|
|
#ifndef __ASSEMBLY__
|
||
|
|
|
||
|
|
/*
|
||
|
|
* This gives the physical RAM offset.
|
||
|
|
*/
|
||
|
|
#define PHYS_OFFSET CONFIG_NIOS2_MEM_BASE
|
||
|
|
|
||
|
|
/*
|
||
|
|
* It's normally defined only for FLATMEM config but it's
|
||
|
|
* used in our early mem init code for all memory models.
|
||
|
|
* So always define it.
|
||
|
|
*/
|
||
|
|
#define ARCH_PFN_OFFSET PFN_UP(PHYS_OFFSET)
|
||
|
|
|
||
|
|
#define clear_page(page) memset((page), 0, PAGE_SIZE)
|
||
|
|
#define copy_page(to, from) memcpy((to), (from), PAGE_SIZE)
|
||
|
|
|
||
|
|
struct page;
|
||
|
|
|
||
|
|
extern void clear_user_page(void *addr, unsigned long vaddr, struct page *page);
|
||
|
|
extern void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
|
||
|
|
struct page *to);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* These are used to make use of C type-checking.
|
||
|
|
*/
|
||
|
|
typedef struct page *pgtable_t;
|
||
|
|
typedef struct { unsigned long pte; } pte_t;
|
||
|
|
typedef struct { unsigned long pgd; } pgd_t;
|
||
|
|
typedef struct { unsigned long pgprot; } pgprot_t;
|
||
|
|
|
||
|
|
#define pte_val(x) ((x).pte)
|
||
|
|
#define pgd_val(x) ((x).pgd)
|
||
|
|
#define pgprot_val(x) ((x).pgprot)
|
||
|
|
|
||
|
|
#define __pte(x) ((pte_t) { (x) })
|
||
|
|
#define __pgd(x) ((pgd_t) { (x) })
|
||
|
|
#define __pgprot(x) ((pgprot_t) { (x) })
|
||
|
|
|
||
|
|
extern unsigned long memory_start;
|
||
|
|
extern unsigned long memory_end;
|
||
|
|
extern unsigned long memory_size;
|
||
|
|
|
||
|
|
extern struct page *mem_map;
|
||
|
|
|
||
|
|
# define __pa(x) \
|
||
|
|
((unsigned long)(x) - PAGE_OFFSET + PHYS_OFFSET)
|
||
|
|
# define __va(x) \
|
||
|
|
((void *)((unsigned long)(x) + PAGE_OFFSET - PHYS_OFFSET))
|
||
|
|
|
||
|
|
#define page_to_virt(page) \
|
||
|
|
((void *)(((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
|
||
|
|
|
||
|
|
# define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
|
||
|
|
|
||
|
|
# define virt_to_page(vaddr) pfn_to_page(PFN_DOWN(virt_to_phys(vaddr)))
|
||
|
|
# define virt_addr_valid(vaddr) pfn_valid(PFN_DOWN(virt_to_phys(vaddr)))
|
||
|
|
|
||
|
|
# define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_NON_EXEC
|
||
|
|
|
||
|
|
#include <asm-generic/memory_model.h>
|
||
|
|
|
||
|
|
#include <asm-generic/getorder.h>
|
||
|
|
|
||
|
|
#endif /* !__ASSEMBLY__ */
|
||
|
|
|
||
|
|
#endif /* _ASM_NIOS2_PAGE_H */
|