/*
* Copyright (C) 2001 Mike Corrigan & Dave Engebretsen, IBM Corporation
* Rewrite, cleanup:
* Copyright (C) 2004 Olof Johansson <[email protected]>, IBM Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/

#ifndef _ASM_POWERPC_TCE_H
#define _ASM_POWERPC_TCE_H
#ifdef __KERNEL__

#include <asm/iommu.h>

/*
* Tces come in two formats, one for the virtual bus and a different
* format for PCI. PCI TCEs can have hardware or software maintianed
* coherency.
*/
#define TCE_VB 0
#define TCE_PCI 1
#define TCE_PCI_SWINV_CREATE 2
#define TCE_PCI_SWINV_FREE 4
#define TCE_PCI_SWINV_PAIR 8

/* TCE page size is 4096 bytes (1 << 12) */

#define TCE_SHIFT 12
#define TCE_PAGE_SIZE (1 << TCE_SHIFT)

#define TCE_ENTRY_SIZE 8 /* each TCE is 64 bits */

#define TCE_RPN_MASK 0xfffffffffful /* 40-bit RPN (4K pages) */
#define TCE_RPN_SHIFT 12
#define TCE_VALID 0x800 /* TCE valid */
#define TCE_ALLIO 0x400 /* TCE valid for all lpars */
#define TCE_PCI_WRITE 0x2 /* write from PCI allowed */
#define TCE_PCI_READ 0x1 /* read from PCI allowed */
#define TCE_VB_WRITE 0x1 /* write from VB allowed */

#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_TCE_H */