arch/openrisc/include/asm/page.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * OpenRISC Linux
   4  *
   5  * Linux architectural port borrowing liberally from similar works of
   6  * others.  All original copyrights apply as per the original source
   7  * declaration.
   8  *
   9  * OpenRISC implementation:
  10  * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
  11  * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
  12  * et al.
  13  */
  14
  15 #ifndef __ASM_OPENRISC_PAGE_H
  16 #define __ASM_OPENRISC_PAGE_H
  17
  18 #include <vdso/page.h>
  19
  20 #define PAGE_OFFSET     0xc0000000
  21 #define KERNELBASE      PAGE_OFFSET
  22
  23 /* This is not necessarily the right place for this, but it's needed by
  24  * drivers/of/fdt.c
  25  */
  26 #include <asm/setup.h>
  27
  28 #ifndef __ASSEMBLY__
  29
  30 #define clear_page(page)        memset((page), 0, PAGE_SIZE)
  31 #define copy_page(to, from)     memcpy((to), (from), PAGE_SIZE)
  32
  33 #define clear_user_page(page, vaddr, pg)        clear_page(page)
  34 #define copy_user_page(to, from, vaddr, pg)     copy_page(to, from)
  35
  36 /*
  37  * These are used to make use of C type-checking..
  38  */
  39 typedef struct {
  40         unsigned long pte;
  41 } pte_t;
  42 typedef struct {
  43         unsigned long pgd;
  44 } pgd_t;
  45 typedef struct {
  46         unsigned long pgprot;
  47 } pgprot_t;
  48 typedef struct page *pgtable_t;
  49
  50 #define pte_val(x)      ((x).pte)
  51 #define pgd_val(x)      ((x).pgd)
  52 #define pgprot_val(x)   ((x).pgprot)
  53
  54 #define __pte(x)        ((pte_t) { (x) })
  55 #define __pgd(x)        ((pgd_t) { (x) })
  56 #define __pgprot(x)     ((pgprot_t) { (x) })
  57
  58 #endif /* !__ASSEMBLY__ */
  59
  60
  61 #ifndef __ASSEMBLY__
  62
  63 #define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET))
  64 #define __pa(x) ((unsigned long) (x) - PAGE_OFFSET)
  65
  66 static inline unsigned long virt_to_pfn(const void *kaddr)
  67 {
  68         return __pa(kaddr) >> PAGE_SHIFT;
  69 }
  70
  71 #define virt_to_page(addr) \
  72         (mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
  73
  74 #define virt_addr_valid(kaddr)  (pfn_valid(virt_to_pfn(kaddr)))
  75
  76 #endif /* __ASSEMBLY__ */
  77
  78 #include <asm-generic/memory_model.h>
  79 #include <asm-generic/getorder.h>
  80
  81 #endif /* __ASM_OPENRISC_PAGE_H */