1 files changed, 23 insertions, 0 deletions

diff --git a/include/asm-mips/scatterlist.h b/include/asm-mips/scatterlist.h
new file mode 100644
index 000000000000..22634706e9d5
--- /dev/null
+++ b/include/asm-mips/scatterlist.h
@@ -0,0 +1,23 @@
+#ifndef __ASM_SCATTERLIST_H
+#define __ASM_SCATTERLIST_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_dma_address(sg)      ((sg)->dma_address)
+#define sg_dma_len(sg)          ((sg)->length)
+
+#define ISA_DMA_THRESHOLD (0x00ffffffUL)
+
+#endif /* __ASM_SCATTERLIST_H */