git.oblomov.eu Git - linux-2.6/blob - arch/xtensa/mm/pgtable.c

   1 /*
   2  * arch/xtensa/mm/fault.c
   3  *
   4  * This file is subject to the terms and conditions of the GNU General Public
   5  * License.  See the file "COPYING" in the main directory of this archive
   6  * for more details.
   7  *
   8  * Copyright (C) 2001 - 2005 Tensilica Inc.
   9  *
  10  * Chris Zankel <chris@zankel.net>
  11  */
  12
  13 #if (DCACHE_SIZE > PAGE_SIZE)
  14
  15 pte_t* pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
  16 {
  17         pte_t *pte, p;
  18         int color = ADDR_COLOR(address);
  19         int i;
  20
  21         p = (pte_t*) __get_free_pages(GFP_KERNEL|__GFP_REPEAT, COLOR_ORDER);
  22
  23         if (likely(p)) {
  24                 struct page *page;
  25
  26                 for (i = 0; i < COLOR_SIZE; i++, p++) {
  27                         page = virt_to_page(pte);
  28
  29                         set_page_count(page, 1);
  30                         ClearPageCompound(page);
  31
  32                         if (ADDR_COLOR(p) == color)
  33                                 pte = p;
  34                         else
  35                                 free_page(p);
  36                 }
  37                 clear_page(pte);
  38         }
  39         return pte;
  40 }
  41
  42 #ifdef PROFILING
  43
  44 int mask;
  45 int hit;
  46 int flush;
  47
  48 #endif
  49
  50 struct page* pte_alloc_one(struct mm_struct *mm, unsigned long address)
  51 {
  52         struct page *page, p;
  53         int color = ADDR_COLOR(address);
  54
  55         p = alloc_pages(GFP_KERNEL | __GFP_REPEAT, PTE_ORDER);
  56
  57         if (likely(p)) {
  58                 for (i = 0; i < PAGE_ORDER; i++) {
  59                         set_page_count(p, 1);
  60                         ClearPageCompound(p);
  61
  62                         if (PADDR_COLOR(page_address(pg)) == color)
  63                                 page = p;
  64                         else
  65                                 free_page(p);
  66                 }
  67                 clear_highpage(page);
  68         }
  69
  70         return page;
  71 }
  72
  73 #endif
  74
  75
  76