1 files changed, 26 insertions, 0 deletions

diff --git a/include/asm-blackfin/scatterlist.h b/include/asm-blackfin/scatterlist.h
new file mode 100644
index 000000000000..60e07b92044c
--- /dev/null
+++ b/include/asm-blackfin/scatterlist.h
@@ -0,0 +1,26 @@
+#ifndef _BLACKFIN_SCATTERLIST_H
+#define _BLACKFIN_SCATTERLIST_H
+
+#include <linux/mm.h>
+
+struct scatterlist {
+        struct page *page;
+        unsigned int offset;
+        dma_addr_t dma_address;
+        unsigned int length;
+};
+
+/*
+ * These macros should be used after a pci_map_sg call has been done
+ * to get bus addresses of each of the SG entries and their lengths.
+ * You should only work with the number of sg entries pci_map_sg
+ * returns, or alternatively stop on the first sg_dma_len(sg) which
+ * is 0.
+ */
+#define sg_address(sg) (page_address((sg)->page) + (sg)->offset)
+#define sg_dma_address(sg)      ((sg)->dma_address)
+#define sg_dma_len(sg)          ((sg)->length)
+
+#define ISA_DMA_THRESHOLD       (0xffffffff)
+
+#endif                          /* !(_BLACKFIN_SCATTERLIST_H) */