include/asm-x86_64/tce.h

   1 /*
   2  * Copyright (C) 2006 Muli Ben-Yehuda <muli@il.ibm.com>, IBM Corporation
   3  * Copyright (C) 2006 Jon Mason <jdmason@us.ibm.com>, IBM Corporation
   4  *
   5  * This file is derived from asm-powerpc/tce.h.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  20  */
  21
  22 #ifndef _ASM_X86_64_TCE_H
  23 #define _ASM_X86_64_TCE_H
  24
  25 extern void* tce_table_kva[];
  26 extern unsigned int specified_table_size;
  27 struct iommu_table;
  28
  29 #define TCE_ENTRY_SIZE   8   /* in bytes */
  30
  31 #define TCE_READ_SHIFT   0
  32 #define TCE_WRITE_SHIFT  1
  33 #define TCE_HUBID_SHIFT  2   /* unused */
  34 #define TCE_RSVD_SHIFT   8   /* unused */
  35 #define TCE_RPN_SHIFT    12
  36 #define TCE_UNUSED_SHIFT 48  /* unused */
  37
  38 #define TCE_RPN_MASK     0x0000fffffffff000ULL
  39
  40 extern void tce_build(struct iommu_table *tbl, unsigned long index,
  41         unsigned int npages, unsigned long uaddr, int direction);
  42 extern void tce_free(struct iommu_table *tbl, long index, unsigned int npages);
  43 extern void* alloc_tce_table(void);
  44 extern void free_tce_table(void *tbl);
  45 extern int build_tce_table(struct pci_dev *dev, void __iomem *bbar);
  46
  47 #endif /* _ASM_X86_64_TCE_H */