1 files changed, 36 insertions, 0 deletions

diff --git a/arch/m68knommu/kernel/dma.c b/arch/m68knommu/kernel/dma.c
new file mode 100644
index 000000000000..14b19c4161f4
--- /dev/null
+++ b/arch/m68knommu/kernel/dma.c
@@ -0,0 +1,36 @@
+/*
+ * Dynamic DMA mapping support.
+ *
+ * We never have any address translations to worry about, so this
+ * is just alloc/free.
+ */
+
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/pci.h>
+#include <asm/io.h>
+
+void *dma_alloc_coherent(struct device *dev, size_t size,
+                           dma_addr_t *dma_handle, int gfp)
+{
+        void *ret;
+        /* ignore region specifiers */
+        gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);
+
+        if (dev == NULL || (*dev->dma_mask < 0xffffffff))
+                gfp |= GFP_DMA;
+        ret = (void *)__get_free_pages(gfp, get_order(size));
+
+        if (ret != NULL) {
+                memset(ret, 0, size);
+                *dma_handle = virt_to_phys(ret);
+        }
+        return ret;
+}
+
+void dma_free_coherent(struct device *dev, size_t size,
+                         void *vaddr, dma_addr_t dma_handle)
+{
+        free_pages((unsigned long)vaddr, get_order(size));
+}