summaryrefslogtreecommitdiff
path: root/arch/frv/mm/highmem.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/frv/mm/highmem.c')
-rw-r--r--arch/frv/mm/highmem.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/arch/frv/mm/highmem.c b/arch/frv/mm/highmem.c
index eadd07658075..fd7fcd4c2e33 100644
--- a/arch/frv/mm/highmem.c
+++ b/arch/frv/mm/highmem.c
@@ -36,3 +36,54 @@ struct page *kmap_atomic_to_page(void *ptr)
{
return virt_to_page(ptr);
}
+
+void *__kmap_atomic(struct page *page)
+{
+ unsigned long paddr;
+ int type;
+
+ pagefault_disable();
+ type = kmap_atomic_idx_push();
+ paddr = page_to_phys(page);
+
+ switch (type) {
+ /*
+ * The first 4 primary maps are reserved for architecture code
+ */
+ case 0: return __kmap_atomic_primary(4, paddr, 6);
+ case 1: return __kmap_atomic_primary(5, paddr, 7);
+ case 2: return __kmap_atomic_primary(6, paddr, 8);
+ case 3: return __kmap_atomic_primary(7, paddr, 9);
+ case 4: return __kmap_atomic_primary(8, paddr, 10);
+
+ case 5 ... 5 + NR_TLB_LINES - 1:
+ return __kmap_atomic_secondary(type - 5, paddr);
+
+ default:
+ BUG();
+ return NULL;
+ }
+}
+EXPORT_SYMBOL(__kmap_atomic);
+
+void __kunmap_atomic(void *kvaddr)
+{
+ int type = kmap_atomic_idx();
+ switch (type) {
+ case 0: __kunmap_atomic_primary(4, 6); break;
+ case 1: __kunmap_atomic_primary(5, 7); break;
+ case 2: __kunmap_atomic_primary(6, 8); break;
+ case 3: __kunmap_atomic_primary(7, 9); break;
+ case 4: __kunmap_atomic_primary(8, 10); break;
+
+ case 5 ... 5 + NR_TLB_LINES - 1:
+ __kunmap_atomic_secondary(type - 5, kvaddr);
+ break;
+
+ default:
+ BUG();
+ }
+ kmap_atomic_idx_pop();
+ pagefault_enable();
+}
+EXPORT_SYMBOL(__kunmap_atomic);