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1 /*
2  * Copyright (C) 2001 Mike Corrigan & Dave Engebretsen, IBM Corporation
3  * Rewrite, cleanup:
4  * Copyright (C) 2004 Olof Johansson <olof@lixom.net>, IBM Corporation
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
19  */
20 
21 #ifndef _ASM_POWERPC_TCE_H
22 #define _ASM_POWERPC_TCE_H
23 #ifdef __KERNEL__
24 
25 #include <asm/iommu.h>
26 
27 /*
28  * Tces come in two formats, one for the virtual bus and a different
29  * format for PCI.  PCI TCEs can have hardware or software maintianed
30  * coherency.
31  */
32 #define TCE_VB			0
33 #define TCE_PCI			1
34 #define TCE_PCI_SWINV_CREATE	2
35 #define TCE_PCI_SWINV_FREE	4
36 #define TCE_PCI_SWINV_PAIR	8
37 
38 /* TCE page size is 4096 bytes (1 << 12) */
39 
40 #define TCE_SHIFT	12
41 #define TCE_PAGE_SIZE	(1 << TCE_SHIFT)
42 
43 #define TCE_ENTRY_SIZE		8		/* each TCE is 64 bits */
44 
45 #define TCE_RPN_MASK		0xfffffffffful  /* 40-bit RPN (4K pages) */
46 #define TCE_RPN_SHIFT		12
47 #define TCE_VALID		0x800		/* TCE valid */
48 #define TCE_ALLIO		0x400		/* TCE valid for all lpars */
49 #define TCE_PCI_WRITE		0x2		/* write from PCI allowed */
50 #define TCE_PCI_READ		0x1		/* read from PCI allowed */
51 #define TCE_VB_WRITE		0x1		/* write from VB allowed */
52 
53 #endif /* __KERNEL__ */
54 #endif /* _ASM_POWERPC_TCE_H */
55