| /* $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); |