1 files changed, 38 insertions, 0 deletions

diff --git a/arch/ia64/include/asm/xen/page-coherent.h b/arch/ia64/include/asm/xen/page-coherent.h
new file mode 100644
index 000000000000..96e42f97fa1f
--- /dev/null
+++ b/arch/ia64/include/asm/xen/page-coherent.h
@@ -0,0 +1,38 @@
+#ifndef _ASM_IA64_XEN_PAGE_COHERENT_H
+#define _ASM_IA64_XEN_PAGE_COHERENT_H
+
+#include <asm/page.h>
+#include <linux/dma-attrs.h>
+#include <linux/dma-mapping.h>
+
+static inline void *xen_alloc_coherent_pages(struct device *hwdev, size_t size,
+                dma_addr_t *dma_handle, gfp_t flags,
+                struct dma_attrs *attrs)
+{
+        void *vstart = (void*)__get_free_pages(flags, get_order(size));
+        *dma_handle = virt_to_phys(vstart);
+        return vstart;
+}
+
+static inline void xen_free_coherent_pages(struct device *hwdev, size_t size,
+                void *cpu_addr, dma_addr_t dma_handle,
+                struct dma_attrs *attrs)
+{
+        free_pages((unsigned long) cpu_addr, get_order(size));
+}
+
+static inline void xen_dma_map_page(struct device *hwdev, struct page *page,
+             unsigned long offset, size_t size, enum dma_data_direction dir,
+             struct dma_attrs *attrs) { }
+
+static inline void xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle,
+                size_t size, enum dma_data_direction dir,
+                struct dma_attrs *attrs) { }
+
+static inline void xen_dma_sync_single_for_cpu(struct device *hwdev,
+                dma_addr_t handle, size_t size, enum dma_data_direction dir) { }
+
+static inline void xen_dma_sync_single_for_device(struct device *hwdev,
+                dma_addr_t handle, size_t size, enum dma_data_direction dir) { }
+
+#endif /* _ASM_IA64_XEN_PAGE_COHERENT_H */