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 = NULL, *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                 split_page(virt_to_page(p), COLOR_ORDER);
  25
  26                 for (i = 0; i < COLOR_SIZE; i++) {
  27                         if (ADDR_COLOR(p) == color)
  28                                 pte = p;
  29                         else
  30                                 free_page(p);
  31                         p += PTRS_PER_PTE;
  32                 }
  33                 clear_page(pte);
  34         }
  35         return pte;
  36 }
  37
  38 #ifdef PROFILING
  39
  40 int mask;
  41 int hit;
  42 int flush;
  43
  44 #endif
  45
  46 struct page* pte_alloc_one(struct mm_struct *mm, unsigned long address)
  47 {
  48         struct page *page = NULL, *p;
  49         int color = ADDR_COLOR(address);
  50
  51         p = alloc_pages(GFP_KERNEL | __GFP_REPEAT, PTE_ORDER);
  52
  53         if (likely(p)) {
  54                 split_page(p, COLOR_ORDER);
  55
  56                 for (i = 0; i < PAGE_ORDER; i++) {
  57                         if (PADDR_COLOR(page_address(p)) == color)
  58                                 page = p;
  59                         else
  60                                 __free_page(p);
  61                         p++;
  62                 }
  63                 clear_highpage(page);
  64         }
  65
  66         return page;
  67 }
  68
  69 #endif
  70
  71
  72