1 /* 2 * Common system pager functionality. 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 #include <l4/re/env.h> 23 24 #include <mem/memory_utils.h> 25 26 #include "pager.h" 27 28 29 30 /* Initialise common functionality. */ 31 32 ExecPager::ExecPager(address_t start, address_t end) 33 : _area(start, end) 34 { 35 } 36 37 /* Necessary virtual destructor. */ 38 39 ExecPager::~ExecPager() 40 { 41 } 42 43 44 45 /* Add an area to the pager. */ 46 47 void ExecPager::add(MemoryArea &area) 48 { 49 _area.add(area); 50 } 51 52 /* Remove an area from the pager. */ 53 54 void ExecPager::remove(MemoryArea &area) 55 { 56 _area.remove(area); 57 } 58 59 60 61 /* Find an area suitable for attaching a memory region. */ 62 63 long ExecPager::find(address_t *start, address_t *size, map_flags_t flags, 64 unsigned char align, MemoryArea **area) 65 { 66 if (align < L4_PAGESHIFT) 67 align = L4_PAGESHIFT; 68 69 /* Attempt to find an address for the specified region, starting from 70 any indicated address. */ 71 72 return _area.find(start, size, flags, align, area); 73 } 74 75 /* vim: tabstop=2 expandtab shiftwidth=2 76 */