73 строки
1.2 KiB
C
73 строки
1.2 KiB
C
/*
|
|
* arch/xtensa/mm/pgtable.c
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 2001 - 2005 Tensilica Inc.
|
|
*
|
|
* Chris Zankel <chris@zankel.net>
|
|
*/
|
|
|
|
#if (DCACHE_SIZE > PAGE_SIZE)
|
|
|
|
pte_t* pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
|
|
{
|
|
pte_t *pte = NULL, *p;
|
|
int color = ADDR_COLOR(address);
|
|
int i;
|
|
|
|
p = (pte_t*) __get_free_pages(GFP_KERNEL|__GFP_REPEAT, COLOR_ORDER);
|
|
|
|
if (likely(p)) {
|
|
split_page(virt_to_page(p), COLOR_ORDER);
|
|
|
|
for (i = 0; i < COLOR_SIZE; i++) {
|
|
if (ADDR_COLOR(p) == color)
|
|
pte = p;
|
|
else
|
|
free_page(p);
|
|
p += PTRS_PER_PTE;
|
|
}
|
|
clear_page(pte);
|
|
}
|
|
return pte;
|
|
}
|
|
|
|
#ifdef PROFILING
|
|
|
|
int mask;
|
|
int hit;
|
|
int flush;
|
|
|
|
#endif
|
|
|
|
struct page* pte_alloc_one(struct mm_struct *mm, unsigned long address)
|
|
{
|
|
struct page *page = NULL, *p;
|
|
int color = ADDR_COLOR(address);
|
|
|
|
p = alloc_pages(GFP_KERNEL | __GFP_REPEAT, PTE_ORDER);
|
|
|
|
if (likely(p)) {
|
|
split_page(p, COLOR_ORDER);
|
|
|
|
for (i = 0; i < PAGE_ORDER; i++) {
|
|
if (PADDR_COLOR(page_address(p)) == color)
|
|
page = p;
|
|
else
|
|
__free_page(p);
|
|
p++;
|
|
}
|
|
clear_highpage(page);
|
|
}
|
|
|
|
return page;
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|