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iommu_64.h
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1 /* iommu.h: Definitions for the sun5 IOMMU.
2  *
3  * Copyright (C) 1996, 1999, 2007 David S. Miller ([email protected])
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  void (*flush_all)(struct iommu *);
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_flushinv;
36  unsigned long iommu_tags;
37  unsigned long iommu_ctxflush;
38  unsigned long write_complete_reg;
39  unsigned long dummy_page;
40  unsigned long dummy_page_pa;
41  unsigned long ctx_lowest_free;
42  DECLARE_BITMAP(ctx_bitmap, IOMMU_NUM_CTXS);
43  u32 dma_addr_mask;
44 };
45 
46 struct strbuf {
47  int strbuf_enabled;
48  unsigned long strbuf_control;
49  unsigned long strbuf_pflush;
50  unsigned long strbuf_fsync;
51  unsigned long strbuf_err_stat;
52  unsigned long strbuf_tag_diag;
53  unsigned long strbuf_line_diag;
54  unsigned long strbuf_ctxflush;
55  unsigned long strbuf_ctxmatch_base;
56  unsigned long strbuf_flushflag_pa;
57  volatile unsigned long *strbuf_flushflag;
58  volatile unsigned long __flushflag_buf[(64+(64-1)) / sizeof(long)];
59 };
60 
61 extern int iommu_table_init(struct iommu *iommu, int tsbsize,
62  u32 dma_offset, u32 dma_addr_mask,
63  int numa_node);
64 
65 #endif /* !(_SPARC64_IOMMU_H) */
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