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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/sparc64/kernel/iommu_common.h
Linux-2.6.12-rc2v2.6.12-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.h48
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 @@
1/* $Id: iommu_common.h,v 1.5 2001/12/11 09:41:01 davem Exp $
2 * iommu_common.h: UltraSparc SBUS/PCI common iommu declarations.
3 *
4 * Copyright (C) 1999 David S. Miller (davem@redhat.com)
5 */
6
7#include <linux/kernel.h>
8#include <linux/types.h>
9#include <linux/sched.h>
10#include <linux/mm.h>
11
12#include <asm/iommu.h>
13#include <asm/scatterlist.h>
14
15/*
16 * These give mapping size of each iommu pte/tlb.
17 */
18#define IO_PAGE_SHIFT 13
19#define IO_PAGE_SIZE (1UL << IO_PAGE_SHIFT)
20#define IO_PAGE_MASK (~(IO_PAGE_SIZE-1))
21#define IO_PAGE_ALIGN(addr) (((addr)+IO_PAGE_SIZE-1)&IO_PAGE_MASK)
22
23#define IO_TSB_ENTRIES (128*1024)
24#define IO_TSB_SIZE (IO_TSB_ENTRIES * 8)
25
26/*
27 * This is the hardwired shift in the iotlb tag/data parts.
28 */
29#define IOMMU_PAGE_SHIFT 13
30
31/* You are _strongly_ advised to enable the following debugging code
32 * any time you make changes to the sg code below, run it for a while
33 * with filesystems mounted read-only before buying the farm... -DaveM
34 */
35#undef VERIFY_SG
36
37#ifdef VERIFY_SG
38extern void verify_sglist(struct scatterlist *sg, int nents, iopte_t *iopte, int npages);
39#endif
40
41/* Two addresses are "virtually contiguous" if and only if:
42 * 1) They are equal, or...
43 * 2) They are both on a page boundary
44 */
45#define VCONTIG(__X, __Y) (((__X) == (__Y)) || \
46 (((__X) | (__Y)) << (64UL - PAGE_SHIFT)) == 0UL)
47
48extern unsigned long prepare_sg(struct scatterlist *sg, int nents);