1 /* 2 * Common system pager functionality. 3 * 4 * Copyright (C) 2022 Paul Boddie <paul@boddie.org.uk> 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License as 8 * published by the Free Software Foundation; either version 2 of 9 * the License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, 19 * Boston, MA 02110-1301, USA 20 */ 21 22 #pragma once 23 24 #include <map> 25 26 #include <exec/mapped_region.h> 27 28 #include "pager_object_interface.h" 29 30 31 32 /* Collection types. */ 33 34 typedef std::map<l4_addr_t, MappedRegion> MappedRegions; 35 36 37 38 /* A simple system pager also acting as a region mapper. */ 39 40 class ExecPager : public PagerObject 41 { 42 protected: 43 address_t _start, _end; 44 45 /* Region manager/mapper functionality. */ 46 47 MappedRegions _regions; 48 49 virtual long find(address_t *start, address_t *size, map_flags_t flags, 50 address_t offset, unsigned char align); 51 52 public: 53 explicit ExecPager(address_t start = 0, address_t end = 0); 54 55 virtual ~ExecPager(); 56 57 virtual void add(MappedRegion ®ion); 58 59 /* Notification methods. */ 60 61 virtual long exception(l4_exc_regs_t regs, 62 l4_snd_fpage_t *region) = 0; 63 64 virtual long page_fault(l4_umword_t pfa, l4_umword_t pc, 65 l4_snd_fpage_t *region) = 0; 66 }; 67 68 /* vim: tabstop=2 expandtab shiftwidth=2 69 */