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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
30 */
31#define TCE_VB 0
32#define TCE_PCI 1
33
34/* TCE page size is 4096 bytes (1 << 12) */
35
36#define TCE_SHIFT 12
37#define TCE_PAGE_SIZE (1 << TCE_SHIFT)
38
39#define TCE_ENTRY_SIZE 8 /* each TCE is 64 bits */
40
41#define TCE_RPN_MASK 0xfffffffffful /* 40-bit RPN (4K pages) */
42#define TCE_RPN_SHIFT 12
43#define TCE_VALID 0x800 /* TCE valid */
44#define TCE_ALLIO 0x400 /* TCE valid for all lpars */
45#define TCE_PCI_WRITE 0x2 /* write from PCI allowed */
46#define TCE_PCI_READ 0x1 /* read from PCI allowed */
47#define TCE_VB_WRITE 0x1 /* write from VB allowed */
48
49#endif /* __KERNEL__ */
50#endif /* _ASM_POWERPC_TCE_H */