include/asm-sparc64/iommu.h

   1 /* $Id: iommu.h,v 1.10 2001/03/08 09:55:56 davem Exp $
   2  * iommu.h: Definitions for the sun5 IOMMU.
   3  *
   4  * Copyright (C) 1996, 1999 David S. Miller (davem@caip.rutgers.edu)
   5  */
   6 #ifndef _SPARC64_IOMMU_H
   7 #define _SPARC64_IOMMU_H
   8
   9 /* The format of an iopte in the page tables. */
  10 #define IOPTE_VALID   0x8000000000000000UL
  11 #define IOPTE_64K     0x2000000000000000UL
  12 #define IOPTE_STBUF   0x1000000000000000UL
  13 #define IOPTE_INTRA   0x0800000000000000UL
  14 #define IOPTE_CONTEXT 0x07ff800000000000UL
  15 #define IOPTE_PAGE    0x00007fffffffe000UL
  16 #define IOPTE_CACHE   0x0000000000000010UL
  17 #define IOPTE_WRITE   0x0000000000000002UL
  18
  19 #define IOMMU_NUM_CTXS  4096
  20
  21 struct iommu_arena {
  22         unsigned long   *map;
  23         unsigned int    hint;
  24         unsigned int    limit;
  25 };
  26
  27 struct iommu {
  28         spinlock_t              lock;
  29         struct iommu_arena      arena;
  30         iopte_t                 *page_table;
  31         u32                     page_table_map_base;
  32         unsigned long           iommu_control;
  33         unsigned long           iommu_tsbbase;
  34         unsigned long           iommu_flush;
  35         unsigned long           iommu_ctxflush;
  36         unsigned long           write_complete_reg;
  37         unsigned long           dummy_page;
  38         unsigned long           dummy_page_pa;
  39         unsigned long           ctx_lowest_free;
  40         DECLARE_BITMAP(ctx_bitmap, IOMMU_NUM_CTXS);
  41         u32                     dma_addr_mask;
  42 };
  43
  44 struct strbuf {
  45         int                     strbuf_enabled;
  46         unsigned long           strbuf_control;
  47         unsigned long           strbuf_pflush;
  48         unsigned long           strbuf_fsync;
  49         unsigned long           strbuf_ctxflush;
  50         unsigned long           strbuf_ctxmatch_base;
  51         unsigned long           strbuf_flushflag_pa;
  52         volatile unsigned long *strbuf_flushflag;
  53         volatile unsigned long  __flushflag_buf[(64+(64-1)) / sizeof(long)];
  54 };
  55
  56 #endif /* !(_SPARC_IOMMU_H) */