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