LXR linux/arch/m68k/include/asm/page.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _M68K_PAGE_H
   3#define _M68K_PAGE_H
   4
   5#include <linux/const.h>
   6#include <asm/setup.h>
   7#include <asm/page_offset.h>
   8
   9/* PAGE_SHIFT determines the page size */
  10#if defined(CONFIG_SUN3) || defined(CONFIG_COLDFIRE)
  11#define PAGE_SHIFT      13
  12#else
  13#define PAGE_SHIFT      12
  14#endif
  15#define PAGE_SIZE       (_AC(1, UL) << PAGE_SHIFT)
  16#define PAGE_MASK       (~(PAGE_SIZE-1))
  17#define PAGE_OFFSET     (PAGE_OFFSET_RAW)
  18
  19#ifndef __ASSEMBLY__
  20
  21/*
  22 * These are used to make use of C type-checking..
  23 */
  24#if !defined(CONFIG_MMU) || CONFIG_PGTABLE_LEVELS == 3
  25typedef struct { unsigned long pmd[16]; } pmd_t;
  26#define pmd_val(x)      ((&x)->pmd[0])
  27#define __pmd(x)        ((pmd_t) { { (x) }, })
  28#endif
  29
  30typedef struct { unsigned long pte; } pte_t;
  31typedef struct { unsigned long pgd; } pgd_t;
  32typedef struct { unsigned long pgprot; } pgprot_t;
  33typedef struct page *pgtable_t;
  34
  35#define pte_val(x)      ((x).pte)
  36#define pgd_val(x)      ((x).pgd)
  37#define pgprot_val(x)   ((x).pgprot)
  38
  39#define __pte(x)        ((pte_t) { (x) } )
  40#define __pgd(x)        ((pgd_t) { (x) } )
  41#define __pgprot(x)     ((pgprot_t) { (x) } )
  42
  43extern unsigned long _rambase;
  44extern unsigned long _ramstart;
  45extern unsigned long _ramend;
  46
  47#endif /* !__ASSEMBLY__ */
  48
  49#ifdef CONFIG_MMU
  50#include <asm/page_mm.h>
  51#else
  52#include <asm/page_no.h>
  53#endif
  54
  55#define __phys_to_pfn(paddr)    ((unsigned long)((paddr) >> PAGE_SHIFT))
  56#define __pfn_to_phys(pfn)      PFN_PHYS(pfn)
  57
  58#define VM_DATA_DEFAULT_FLAGS   (VM_READ | VM_WRITE | VM_EXEC | \
  59                                 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
  60
  61#include <asm-generic/getorder.h>
  62
  63#endif /* _M68K_PAGE_H */
  64