include/asm-sparc64/iommu.h

   1 /* iommu.h: Definitions for the sun5 IOMMU.
   2  *
   3  * Copyright (C) 1996, 1999, 2007 David S. Miller (davem@davemloft.net)
   4  */
   5 #ifndef _SPARC64_IOMMU_H
   6 #define _SPARC64_IOMMU_H
   7
   8 /* The format of an iopte in the page tables. */
   9 #define IOPTE_VALID   0x8000000000000000UL
  10 #define IOPTE_64K     0x2000000000000000UL
  11 #define IOPTE_STBUF   0x1000000000000000UL
  12 #define IOPTE_INTRA   0x0800000000000000UL
  13 #define IOPTE_CONTEXT 0x07ff800000000000UL
  14 #define IOPTE_PAGE    0x00007fffffffe000UL
  15 #define IOPTE_CACHE   0x0000000000000010UL
  16 #define IOPTE_WRITE   0x0000000000000002UL
  17
  18 #define IOMMU_NUM_CTXS  4096
  19
  20 struct iommu_arena {
  21         unsigned long   *map;
  22         unsigned int    hint;
  23         unsigned int    limit;
  24 };
  25
  26 struct iommu {
  27         spinlock_t              lock;
  28         struct iommu_arena      arena;
  29         iopte_t                 *page_table;
  30         u32                     page_table_map_base;
  31         unsigned long           iommu_control;
  32         unsigned long           iommu_tsbbase;
  33         unsigned long           iommu_flush;
  34         unsigned long           iommu_flushinv;
  35         unsigned long           iommu_tags;
  36         unsigned long           iommu_ctxflush;
  37         unsigned long           write_complete_reg;
  38         unsigned long           dummy_page;
  39         unsigned long           dummy_page_pa;
  40         unsigned long           ctx_lowest_free;
  41         DECLARE_BITMAP(ctx_bitmap, IOMMU_NUM_CTXS);
  42         u32                     dma_addr_mask;
  43 };
  44
  45 struct strbuf {
  46         int                     strbuf_enabled;
  47         unsigned long           strbuf_control;
  48         unsigned long           strbuf_pflush;
  49         unsigned long           strbuf_fsync;
  50         unsigned long           strbuf_ctxflush;
  51         unsigned long           strbuf_ctxmatch_base;
  52         unsigned long           strbuf_flushflag_pa;
  53         volatile unsigned long *strbuf_flushflag;
  54         volatile unsigned long  __flushflag_buf[(64+(64-1)) / sizeof(long)];
  55 };
  56
  57 extern int iommu_table_init(struct iommu *iommu, int tsbsize,
  58                             u32 dma_offset, u32 dma_addr_mask);
  59
  60 #endif /* !(_SPARC64_IOMMU_H) */