patch-2.3.35 linux/arch/sparc64/kernel/iommu_common.h

• Lines: 35
• Date: Mon Dec 20 22:05:52 1999
• Orig file: v2.3.34/linux/arch/sparc64/kernel/iommu_common.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.34/linux/arch/sparc64/kernel/iommu_common.h linux/arch/sparc64/kernel/iommu_common.h
@@ -0,0 +1,34 @@
+/* $Id: iommu_common.h,v 1.1 1999/12/17 12:31:54 jj Exp $
+ * iommu_common.h: UltraSparc SBUS/PCI common iommu declarations.
+ *
+ * Copyright (C) 1999 David S. Miller (davem@redhat.com)
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+
+#include <asm/page.h>
+#include <asm/iommu.h>
+#include <asm/scatterlist.h>
+
+/* You are _strongly_ advised to enable the following debugging code
+ * any time you make changes to the sg code below, run it for a while
+ * with filesystems mounted read-only before buying the farm... -DaveM
+ */
+#undef VERIFY_SG
+
+#ifdef VERIFY_SG
+int verify_lengths(struct scatterlist *sg, int nents, int npages);
+int verify_one_map(struct scatterlist *dma_sg, struct scatterlist **__sg, int nents, iopte_t **__iopte);
+int verify_maps(struct scatterlist *sg, int nents, iopte_t *iopte);
+void verify_sglist(struct scatterlist *sg, int nents, iopte_t *iopte, int npages);
+#endif
+
+/* Two addresses are "virtually contiguous" if and only if:
+ * 1) They are equal, or...
+ * 2) They are both on a page boundry
+ */
+#define VCONTIG(__X, __Y)	(((__X) == (__Y)) || \
+				 (((__X) | (__Y)) << (64UL - PAGE_SHIFT)) == 0UL)
+
+unsigned long prepare_sg(struct scatterlist *sg, int nents);