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.
4 * Copyright (C) 1999 David S. Miller (davem@redhat.com)
7 #include <linux/kernel.h>
8 #include <linux/types.h>
9 #include <linux/sched.h>
12 #include <asm/iommu.h>
13 #include <asm/scatterlist.h>
16 * These give mapping size of each iommu pte/tlb.
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)
23 #define IO_TSB_ENTRIES (128*1024)
24 #define IO_TSB_SIZE (IO_TSB_ENTRIES * 8)
27 * This is the hardwired shift in the iotlb tag/data parts.
29 #define IOMMU_PAGE_SHIFT 13
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
38 extern void verify_sglist(struct scatterlist
*sg
, int nents
, iopte_t
*iopte
, int npages
);
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
45 #define VCONTIG(__X, __Y) (((__X) == (__Y)) || \
46 (((__X) | (__Y)) << (64UL - PAGE_SHIFT)) == 0UL)
48 extern unsigned long prepare_sg(struct scatterlist
*sg
, int nents
);
This page took 0.032752 seconds and 5 git commands to generate.