1 files changed, 33 insertions, 0 deletions

diff --git a/arch/x86/include/asm/scatterlist.h b/arch/x86/include/asm/scatterlist.h
new file mode 100644
index 000000000000..263d397d2eef
--- /dev/null
+++ b/arch/x86/include/asm/scatterlist.h
@@ -0,0 +1,33 @@
+#ifndef _ASM_X86_SCATTERLIST_H
+#define _ASM_X86_SCATTERLIST_H
+
+#include <asm/types.h>
+
+struct scatterlist {
+#ifdef CONFIG_DEBUG_SG
+        unsigned long   sg_magic;
+#endif
+        unsigned long   page_link;
+        unsigned int    offset;
+        unsigned int    length;
+        dma_addr_t      dma_address;
+        unsigned int    dma_length;
+};
+
+#define ARCH_HAS_SG_CHAIN
+#define ISA_DMA_THRESHOLD (0x00ffffff)
+
+/*
+ * 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.
+ */
+#define sg_dma_address(sg)      ((sg)->dma_address)
+#ifdef CONFIG_X86_32
+# define sg_dma_len(sg)         ((sg)->length)
+#else
+# define sg_dma_len(sg)         ((sg)->dma_length)
+#endif
+
+#endif /* _ASM_X86_SCATTERLIST_H */