src/target/nds32_tlb.h

   1 /***************************************************************************
   2  *   Copyright (C) 2013 Andes Technology                                   *
   3  *   Hsiangkai Wang <hkwang@andestech.com>                                 *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.           *
  19  ***************************************************************************/
  20 #ifndef __NDS32_TLB_H__
  21 #define __NDS32_TLB_H__
  22
  23 #include "nds32.h"
  24
  25 enum {
  26         PAGE_SIZE_4K = 0,
  27         PAGE_SIZE_8K,
  28         PAGE_SIZE_NUM,
  29 };
  30
  31 struct page_table_walker_info_s {
  32
  33         uint32_t L1_offset_mask;
  34         uint32_t L1_offset_shift;
  35         uint32_t L2_offset_mask;
  36         uint32_t L2_offset_shift;
  37         uint32_t va_offset_mask;
  38         uint32_t L1_base_mask;
  39         uint32_t L2_base_mask;
  40         uint32_t ppn_mask;
  41 };
  42
  43 extern int nds32_probe_tlb(struct nds32 *nds32, const uint32_t virtual_address,
  44                 uint32_t *physical_address);
  45 extern int nds32_walk_page_table(struct nds32 *nds32, const uint32_t virtual_address,
  46                 uint32_t *physical_address);
  47
  48 #endif