include/asm-um/page.h

   1 /*
   2  *  Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
   3  * Licensed under the GPL
   4  */
   5
   6 #ifndef __UM_PAGE_H
   7 #define __UM_PAGE_H
   8
   9 struct page;
  10
  11 #include "asm/arch/page.h"
  12
  13 #undef __pa
  14 #undef __va
  15 #undef pfn_to_page
  16 #undef page_to_pfn
  17 #undef virt_to_page
  18 #undef pfn_valid
  19 #undef virt_addr_valid
  20 #undef VALID_PAGE
  21 #undef PAGE_OFFSET
  22 #undef KERNELBASE
  23
  24 extern unsigned long uml_physmem;
  25
  26 #define PAGE_OFFSET (uml_physmem)
  27 #define KERNELBASE PAGE_OFFSET
  28
  29 #define __va_space (8*1024*1024)
  30
  31 extern unsigned long to_phys(void *virt);
  32 extern void *to_virt(unsigned long phys);
  33
  34 #define __pa(virt) to_phys((void *) virt)
  35 #define __va(phys) to_virt((unsigned long) phys)
  36
  37 #define page_to_pfn(page) ((page) - mem_map)
  38 #define pfn_to_page(pfn) (mem_map + (pfn))
  39
  40 #define phys_to_pfn(p) ((p) >> PAGE_SHIFT)
  41 #define pfn_to_phys(pfn) ((pfn) << PAGE_SHIFT)
  42
  43 #define pfn_valid(pfn) ((pfn) < max_mapnr)
  44 #define virt_addr_valid(v) pfn_valid(phys_to_pfn(__pa(v)))
  45
  46 extern struct page *arch_validate(struct page *page, int mask, int order);
  47 #define HAVE_ARCH_VALIDATE
  48
  49 extern void arch_free_page(struct page *page, int order);
  50 #define HAVE_ARCH_FREE_PAGE
  51
  52 #endif