1/* $Id: iommu.h,v 1.1.1.1 2007/08/03 18:53:36 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
21struct iommu_arena {
22	unsigned long	*map;
23	unsigned int	hint;
24	unsigned int	limit;
25};
26
27struct 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
45struct 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) */
58