* 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.
+ *
*/
+
#include <linux/init.h>
#include <linux/mman.h>
#include <linux/mm.h>
#include <linux/threads.h>
+#include <linux/fs.h>
#include <asm/addrspace.h>
#include <asm/page.h>
#include <asm/pgtable.h>
{
struct page *page = virt_to_page(to);
+ __set_bit(PG_mapped, &page->flags);
if (((address ^ (unsigned long)to) & CACHE_ALIAS) == 0) {
clear_page(to);
__flush_wback_region(to, PAGE_SIZE);
* @from: P1 address
* @address: U0 address to be mapped
*/
-void copy_user_page(void *to, void *from, unsigned long address,
- struct page *pg)
+void copy_user_page(void *to, void *from, unsigned long address, struct page *pg)
{
struct page *page = virt_to_page(to);
+
+ __set_bit(PG_mapped, &page->flags);
if (((address ^ (unsigned long)to) & CACHE_ALIAS) == 0) {
copy_page(to, from);
__flush_wback_region(to, PAGE_SIZE);
__flush_wback_region(to, PAGE_SIZE);
}
}
+
+/*
+ * For SH7705, we have our own implementation for ptep_get_and_clear
+ * Copied from pg-sh4.c
+ */
+pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
+{
+ pte_t pte = *ptep;
+
+ pte_clear(mm, addr, ptep);
+ if (!pte_not_present(pte)) {
+ unsigned long pfn = pte_pfn(pte);
+ if (pfn_valid(pfn)) {
+ struct page *page = pfn_to_page(pfn);
+ struct address_space *mapping = page_mapping(page);
+ if (!mapping || !mapping_writably_mapped(mapping))
+ __clear_bit(PG_mapped, &page->flags);
+ }
+ }
+
+ return pte;
+}
+