1 files changed, 48 insertions, 0 deletions

diff --git a/arch/sparc64/kernel/iommu_common.h b/arch/sparc64/kernel/iommu_common.h
new file mode 100644
index 000000000000..ad791014419c
--- /dev/null
+++ b/arch/sparc64/kernel/iommu_common.h
@@ -0,0 +1,48 @@
+/* $Id: iommu_common.h,v 1.5 2001/12/11 09:41:01 davem 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 <linux/sched.h>
+#include <linux/mm.h>
+
+#include <asm/iommu.h>
+#include <asm/scatterlist.h>
+
+/*
+ * These give mapping size of each iommu pte/tlb.
+ */
+#define IO_PAGE_SHIFT                   13
+#define IO_PAGE_SIZE                    (1UL << IO_PAGE_SHIFT)
+#define IO_PAGE_MASK                    (~(IO_PAGE_SIZE-1))
+#define IO_PAGE_ALIGN(addr)             (((addr)+IO_PAGE_SIZE-1)&IO_PAGE_MASK)
+
+#define IO_TSB_ENTRIES                  (128*1024)
+#define IO_TSB_SIZE                     (IO_TSB_ENTRIES * 8)
+
+/*
+ * This is the hardwired shift in the iotlb tag/data parts.
+ */
+#define IOMMU_PAGE_SHIFT                13
+
+/* 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
+extern 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 boundary
+ */
+#define VCONTIG(__X, __Y)       (((__X) == (__Y)) || \
+                                 (((__X) | (__Y)) << (64UL - PAGE_SHIFT)) == 0UL)
+
+extern unsigned long prepare_sg(struct scatterlist *sg, int nents);