1 /* 2 * A system pager implementation residing in a separate task. 3 * 4 * Copyright (C) 2022, 2023 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 <exec/pager.h> 25 26 #include "notifier_interface.h" 27 #include "parent_pager_object_interface.h" 28 29 30 31 /* A simple system pager also acting as a region mapper. */ 32 33 class ExternalPager : public ExecPager, public ParentPagerObject 34 { 35 protected: 36 Notifier *_notifier = NULL; 37 38 public: 39 explicit ExternalPager(address_t start = 0, address_t end = 0); 40 41 /* Notification methods, implementing PagerObject. */ 42 43 virtual long exception(l4_exc_regs_t regs, 44 l4_snd_fpage_t *region); 45 46 virtual long page_fault(l4_umword_t pfa, l4_umword_t pc, 47 l4_snd_fpage_t *region); 48 49 /* Region manager/mapper methods. */ 50 51 virtual long attach(address_t *start, address_t size, map_flags_t flags, 52 l4_cap_idx_t ds, address_t offset, unsigned char align); 53 54 /* Parent methods. */ 55 56 virtual long signal(unsigned long sig, unsigned long val); 57 58 /* Notification methods. */ 59 60 virtual void set_notifier(Notifier *notifier) 61 { _notifier = notifier; } 62 }; 63 64 /* vim: tabstop=2 expandtab shiftwidth=2 65 */