LXR linux/arch/xtensa/mm/pgtable.c

   1/*
   2 * arch/xtensa/mm/pgtable.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
  15pte_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
  40int mask;
  41int hit;
  42int flush;
  43
  44#endif
  45
  46struct 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
  73