From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- arch/sparc64/kernel/iommu_common.h | 48 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 arch/sparc64/kernel/iommu_common.h (limited to 'arch/sparc64/kernel/iommu_common.h') 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 +#include +#include +#include + +#include +#include + +/* + * 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); -- cgit v1.2.2