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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/sparc64/kernel/iommu_common.h | |
download | linux-fsl-qoriq-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
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!
Diffstat (limited to 'arch/sparc64/kernel/iommu_common.h')
-rw-r--r-- | arch/sparc64/kernel/iommu_common.h | 48 |
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 0000000..ad79101 --- /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); |