/*
   * Copyright (C) 2001 Mike Corrigan & Dave Engebretsen, IBM Corporation
   * Rewrite, cleanup:

   * Copyright (C) 2004 Olof Johansson <olof@lixom.net>, 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
   */
  #define TCE_VB  0
  #define TCE_PCI 1

  /* 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 */