1/*
  2 * OpenRISC Linux
  3 *
  4 * Linux architectural port borrowing liberally from similar works of
  5 * others.  All original copyrights apply as per the original source
  6 * declaration.
  7 *
  8 * OpenRISC implementation:
  9 * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
 10 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
 11 * et al.
 12 *
 13 * This program is free software; you can redistribute it and/or modify
 14 * it under the terms of the GNU General Public License as published by
 15 * the Free Software Foundation; either version 2 of the License, or
 16 * (at your option) any later version.
 17 */
 18
 19#ifndef __ASM_OPENRISC_PAGE_H
 20#define __ASM_OPENRISC_PAGE_H
 21
 22
 23/* PAGE_SHIFT determines the page size */
 24
 25#define PAGE_SHIFT      13
 26#ifdef __ASSEMBLY__
 27#define PAGE_SIZE       (1 << PAGE_SHIFT)
 28#else
 29#define PAGE_SIZE       (1UL << PAGE_SHIFT)
 30#endif
 31#define PAGE_MASK       (~(PAGE_SIZE-1))
 32
 33#define PAGE_OFFSET	0xc0000000
 34#define KERNELBASE	PAGE_OFFSET
 35
 36/* This is not necessarily the right place for this, but it's needed by
 37 * drivers/of/fdt.c
 38 */
 39#include <asm/setup.h>
 40
 41#ifndef __ASSEMBLY__
 42
 43#define get_user_page(vaddr)            __get_free_page(GFP_KERNEL)
 44#define free_user_page(page, addr)      free_page(addr)
 45
 46#define clear_page(page)	memset((page), 0, PAGE_SIZE)
 47#define copy_page(to, from)	memcpy((to), (from), PAGE_SIZE)
 48
 49#define clear_user_page(page, vaddr, pg)        clear_page(page)
 50#define copy_user_page(to, from, vaddr, pg)     copy_page(to, from)
 51
 52/*
 53 * These are used to make use of C type-checking..
 54 */
 55typedef struct {
 56	unsigned long pte;
 57} pte_t;
 58typedef struct {
 59	unsigned long pgd;
 60} pgd_t;
 61typedef struct {
 62	unsigned long pgprot;
 63} pgprot_t;
 64typedef struct page *pgtable_t;
 65
 66#define pte_val(x)	((x).pte)
 67#define pgd_val(x)	((x).pgd)
 68#define pgprot_val(x)	((x).pgprot)
 69
 70#define __pte(x)	((pte_t) { (x) })
 71#define __pgd(x)	((pgd_t) { (x) })
 72#define __pgprot(x)	((pgprot_t) { (x) })
 73
 74#endif /* !__ASSEMBLY__ */
 75
 76
 77#ifndef __ASSEMBLY__
 78
 79#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET))
 80#define __pa(x) ((unsigned long) (x) - PAGE_OFFSET)
 81
 82#define virt_to_pfn(kaddr)      (__pa(kaddr) >> PAGE_SHIFT)
 83#define pfn_to_virt(pfn)        __va((pfn) << PAGE_SHIFT)
 84
 85#define virt_to_page(addr) \
 86	(mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
 87#define page_to_virt(page) \
 88	((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
 89
 90#define page_to_phys(page)      ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
 91
 92#define pfn_valid(pfn)          ((pfn) < max_mapnr)
 93
 94#define virt_addr_valid(kaddr)	(pfn_valid(virt_to_pfn(kaddr)))
 95
 96#endif /* __ASSEMBLY__ */
 97
 98
 99#define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \
100				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
101
102
103#include <asm-generic/memory_model.h>
104#include <asm-generic/getorder.h>
105
106#endif /* __ASM_OPENRISC_PAGE_H */