*
* Released under the terms of the GNU GPL v2.0.
*/
-#include <linux/init.h>
-#include <linux/mman.h>
#include <linux/mm.h>
-#include <linux/threads.h>
-#include <asm/addrspace.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/processor.h>
-#include <asm/cache.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/pgalloc.h>
+#include <linux/mutex.h>
#include <asm/mmu_context.h>
#include <asm/cacheflush.h>
-extern struct semaphore p3map_sem[];
+extern struct mutex p3map_mutex[];
-#define CACHE_ALIAS (cpu_data->dcache.alias_mask)
+#define CACHE_ALIAS (current_cpu_data.dcache.alias_mask)
/*
* clear_user_page
*/
void clear_user_page(void *to, unsigned long address, struct page *page)
{
- __set_bit(PG_mapped, &page->flags);
if (((address ^ (unsigned long)to) & CACHE_ALIAS) == 0)
clear_page(to);
else {
- pgprot_t pgprot = __pgprot(_PAGE_PRESENT |
- _PAGE_RW | _PAGE_CACHABLE |
- _PAGE_DIRTY | _PAGE_ACCESSED |
- _PAGE_HW_SHARED | _PAGE_FLAGS_HARD);
unsigned long phys_addr = PHYSADDR(to);
unsigned long p3_addr = P3SEG + (address & CACHE_ALIAS);
pgd_t *pgd = pgd_offset_k(p3_addr);
pte_t entry;
unsigned long flags;
- entry = pfn_pte(phys_addr >> PAGE_SHIFT, pgprot);
- down(&p3map_sem[(address & CACHE_ALIAS)>>12]);
+ entry = pfn_pte(phys_addr >> PAGE_SHIFT, PAGE_KERNEL);
+ mutex_lock(&p3map_mutex[(address & CACHE_ALIAS)>>12]);
set_pte(pte, entry);
local_irq_save(flags);
- __flush_tlb_page(get_asid(), p3_addr);
+ flush_tlb_one(get_asid(), p3_addr);
local_irq_restore(flags);
update_mmu_cache(NULL, p3_addr, entry);
__clear_user_page((void *)p3_addr, to);
pte_clear(&init_mm, p3_addr, pte);
- up(&p3map_sem[(address & CACHE_ALIAS)>>12]);
+ mutex_unlock(&p3map_mutex[(address & CACHE_ALIAS)>>12]);
}
}
void copy_user_page(void *to, void *from, unsigned long address,
struct page *page)
{
- __set_bit(PG_mapped, &page->flags);
if (((address ^ (unsigned long)to) & CACHE_ALIAS) == 0)
copy_page(to, from);
else {
- pgprot_t pgprot = __pgprot(_PAGE_PRESENT |
- _PAGE_RW | _PAGE_CACHABLE |
- _PAGE_DIRTY | _PAGE_ACCESSED |
- _PAGE_HW_SHARED | _PAGE_FLAGS_HARD);
unsigned long phys_addr = PHYSADDR(to);
unsigned long p3_addr = P3SEG + (address & CACHE_ALIAS);
pgd_t *pgd = pgd_offset_k(p3_addr);
pte_t entry;
unsigned long flags;
- entry = pfn_pte(phys_addr >> PAGE_SHIFT, pgprot);
- down(&p3map_sem[(address & CACHE_ALIAS)>>12]);
+ entry = pfn_pte(phys_addr >> PAGE_SHIFT, PAGE_KERNEL);
+ mutex_lock(&p3map_mutex[(address & CACHE_ALIAS)>>12]);
set_pte(pte, entry);
local_irq_save(flags);
- __flush_tlb_page(get_asid(), p3_addr);
+ flush_tlb_one(get_asid(), p3_addr);
local_irq_restore(flags);
update_mmu_cache(NULL, p3_addr, entry);
__copy_user_page((void *)p3_addr, from, to);
pte_clear(&init_mm, p3_addr, pte);
- up(&p3map_sem[(address & CACHE_ALIAS)>>12]);
+ mutex_unlock(&p3map_mutex[(address & CACHE_ALIAS)>>12]);
}
}
-
-/*
- * For SH-4, we have our own implementation for ptep_get_and_clear
- */
-inline 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;
-}
-