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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_flushinv;
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 #endif /* !(_SPARC_IOMMU_H) */