linux/arch/m68k/include/asm/page.h
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   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; } pmd_t;
  26#define pmd_val(x)      ((&x)->pmd)
  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;
  33
  34#if defined(CONFIG_SUN3)
  35/*
  36 * Sun3 still uses the asm-generic/pgalloc.h code and thus needs this
  37 * definition. It would be possible to unify Sun3 and ColdFire pgalloc and have
  38 * all of m68k use the same type.
  39 */
  40typedef struct page *pgtable_t;
  41#else
  42typedef pte_t *pgtable_t;
  43#endif
  44
  45#define pte_val(x)      ((x).pte)
  46#define pgd_val(x)      ((x).pgd)
  47#define pgprot_val(x)   ((x).pgprot)
  48
  49#define __pte(x)        ((pte_t) { (x) } )
  50#define __pgd(x)        ((pgd_t) { (x) } )
  51#define __pgprot(x)     ((pgprot_t) { (x) } )
  52
  53extern unsigned long _rambase;
  54extern unsigned long _ramstart;
  55extern unsigned long _ramend;
  56
  57#endif /* !__ASSEMBLY__ */
  58
  59#ifdef CONFIG_MMU
  60#include <asm/page_mm.h>
  61#else
  62#include <asm/page_no.h>
  63#endif
  64
  65#ifndef CONFIG_MMU
  66#define __phys_to_pfn(paddr)    ((unsigned long)((paddr) >> PAGE_SHIFT))
  67#define __pfn_to_phys(pfn)      PFN_PHYS(pfn)
  68#endif
  69
  70#include <asm-generic/getorder.h>
  71
  72#endif /* _M68K_PAGE_H */
  73
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