void __flush_anon_page(struct page *page, unsigned long vmaddr)
{
#ifdef CONFIG_RALINK_SOC
if (!PageHighMem(page)) {
unsigned long addr = (unsigned long) page_address(page);
if (pages_do_alias(addr, vmaddr & PAGE_MASK)) {
if (page_mapped(page) && !Page_dcache_dirty(page)) {
void *kaddr;
kaddr = kmap_coherent(page, vmaddr);
flush_data_cache_page((unsigned long)kaddr);
kunmap_coherent();
} else {
flush_data_cache_page(addr);
ClearPageDcacheDirty(page);
}
}
} else {
void *laddr = lowmem_page_address(page);
if (pages_do_alias((unsigned long)laddr, vmaddr & PAGE_MASK)) {
if (page_mapped(page) && !Page_dcache_dirty(page)) {
void *kaddr;
kaddr = kmap_coherent(page, vmaddr);
flush_data_cache_page((unsigned long)kaddr);
kunmap_coherent();
} else {
void *kaddr;
kaddr = kmap_atomic(page, KM_PTE1);
flush_data_cache_page((unsigned long)kaddr);
kunmap_atomic(kaddr, KM_PTE1);
ClearPageDcacheDirty(page);
}
}
}
#else
unsigned long addr = (unsigned long) page_address(page);
if (pages_do_alias(addr, vmaddr)) {
if (page_mapped(page) && !Page_dcache_dirty(page)) {
void *kaddr;
kaddr = kmap_coherent(page, vmaddr);
flush_data_cache_page((unsigned long)kaddr);
kunmap_coherent();
} else
flush_data_cache_page(addr);
}
#endif
}
void copy_user_highpage(struct page *to, struct page *from,
unsigned long vaddr, struct vm_area_struct *vma)
{
void *vfrom, *vto;
vto = kmap_atomic(to);
if (boot_cpu_data.dcache.n_aliases && page_mapped(from) &&
test_bit(PG_dcache_clean, &from->flags)) {
vfrom = kmap_coherent(from, vaddr);
copy_page(vto, vfrom);
kunmap_coherent(vfrom);
} else {
vfrom = kmap_atomic(from);
copy_page(vto, vfrom);
kunmap_atomic(vfrom);
}
if (pages_do_alias((unsigned long)vto, vaddr & PAGE_MASK) ||
(vma->vm_flags & VM_EXEC))
__flush_purge_region(vto, PAGE_SIZE);
kunmap_atomic(vto);
/* Make sure this page is cleared on other CPU's too before using it */
smp_wmb();
}
void __flush_anon_page(struct page *page, unsigned long vmaddr)
{
if (pages_do_alias((unsigned long)page_address(page), vmaddr)) {
void *kaddr;
kaddr = kmap_coherent(page, vmaddr);
flush_data_cache_page((unsigned long)kaddr);
kunmap_coherent();
}
}
void copy_from_user_page(struct vm_area_struct *vma, struct page *page,
unsigned long vaddr, void *dst, const void *src,
unsigned long len)
{
if (boot_cpu_data.dcache.n_aliases && page_mapped(page) &&
test_bit(PG_dcache_clean, &page->flags)) {
void *vfrom = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK);
memcpy(dst, vfrom, len);
kunmap_coherent(vfrom);
} else {
memcpy(dst, src, len);
if (boot_cpu_data.dcache.n_aliases)
clear_bit(PG_dcache_clean, &page->flags);
}
}
void __flush_anon_page(struct page *page, unsigned long vmaddr)
{
unsigned long addr = (unsigned long) page_address(page);
if (pages_do_alias(addr, vmaddr)) {
if (page_mapped(page) && !Page_dcache_dirty(page)) {
void *kaddr;
kaddr = kmap_coherent(page, vmaddr);
flush_data_cache_page((unsigned long)kaddr);
kunmap_coherent();
} else
flush_data_cache_page(addr);
}
}
void __flush_anon_page(struct page *page, unsigned long vmaddr)
{
unsigned long addr = (unsigned long) page_address(page);
if (pages_do_alias(addr, vmaddr)) {
if (boot_cpu_data.dcache.n_aliases && page_mapped(page) &&
test_bit(PG_dcache_clean, &page->flags)) {
void *kaddr;
kaddr = kmap_coherent(page, vmaddr);
/* XXX.. For now kunmap_coherent() does a purge */
/* __flush_purge_region((void *)kaddr, PAGE_SIZE); */
kunmap_coherent(kaddr);
} else
__flush_purge_region((void *)addr, PAGE_SIZE);
}
}
void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
unsigned long vaddr, void *dst, const void *src,
unsigned long len)
{
if (boot_cpu_data.dcache.n_aliases && page_mapped(page) &&
test_bit(PG_dcache_clean, &page->flags)) {
void *vto = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK);
memcpy(vto, src, len);
kunmap_coherent(vto);
} else {
memcpy(dst, src, len);
if (boot_cpu_data.dcache.n_aliases)
clear_bit(PG_dcache_clean, &page->flags);
}
if (vma->vm_flags & VM_EXEC)
flush_cache_page(vma, vaddr, page_to_pfn(page));
}