arch/x86/include/asm/tce.h

   1 /*
   2  * This file is derived from asm-powerpc/tce.h.
   3  *
   4  * Copyright (C) IBM Corporation, 2006
   5  *
   6  * Author: Muli Ben-Yehuda <muli@il.ibm.com>
   7  * Author: Jon Mason <jdmason@us.ibm.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  22  */
  23
  24 #ifndef _ASM_X86_TCE_H
  25 #define _ASM_X86_TCE_H
  26
  27 extern unsigned int specified_table_size;
  28 struct iommu_table;
  29
  30 #define TCE_ENTRY_SIZE   8   /* in bytes */
  31
  32 #define TCE_READ_SHIFT   0
  33 #define TCE_WRITE_SHIFT  1
  34 #define TCE_HUBID_SHIFT  2   /* unused */
  35 #define TCE_RSVD_SHIFT   8   /* unused */
  36 #define TCE_RPN_SHIFT    12
  37 #define TCE_UNUSED_SHIFT 48  /* unused */
  38
  39 #define TCE_RPN_MASK     0x0000fffffffff000ULL
  40
  41 extern void tce_build(struct iommu_table *tbl, unsigned long index,
  42                       unsigned int npages, unsigned long uaddr, int direction);
  43 extern void tce_free(struct iommu_table *tbl, long index, unsigned int npages);
  44 extern void * __init alloc_tce_table(void);
  45 extern void __init free_tce_table(void *tbl);
  46 extern int __init build_tce_table(struct pci_dev *dev, void __iomem *bbar);
  47
  48 #endif /* _ASM_X86_TCE_H */