| paul@366 | 1 | /* |
| paul@366 | 2 | * A system pager implementation residing in a separate task. |
| paul@366 | 3 | * |
| paul@631 | 4 | * Copyright (C) 2022, 2023, 2024 Paul Boddie <paul@boddie.org.uk> |
| paul@366 | 5 | * |
| paul@366 | 6 | * This program is free software; you can redistribute it and/or |
| paul@366 | 7 | * modify it under the terms of the GNU General Public License as |
| paul@366 | 8 | * published by the Free Software Foundation; either version 2 of |
| paul@366 | 9 | * the License, or (at your option) any later version. |
| paul@366 | 10 | * |
| paul@366 | 11 | * This program is distributed in the hope that it will be useful, |
| paul@366 | 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| paul@366 | 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| paul@366 | 14 | * GNU General Public License for more details. |
| paul@366 | 15 | * |
| paul@366 | 16 | * You should have received a copy of the GNU General Public License |
| paul@366 | 17 | * along with this program; if not, write to the Free Software |
| paul@366 | 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| paul@366 | 19 | * Boston, MA 02110-1301, USA |
| paul@366 | 20 | */ |
| paul@366 | 21 | |
| paul@366 | 22 | #pragma once |
| paul@366 | 23 | |
| paul@550 | 24 | #include <set> |
| paul@550 | 25 | |
| paul@504 | 26 | #include <exec/elf.h> |
| paul@366 | 27 | #include <exec/pager.h> |
| paul@543 | 28 | #include <exec/process_monitor.h> |
| paul@504 | 29 | #include <exec/segment.h> |
| paul@535 | 30 | #include <resource/resource.h> |
| paul@366 | 31 | |
| paul@469 | 32 | #include "parent_pager_object_interface.h" |
| paul@469 | 33 | |
| paul@366 | 34 | |
| paul@366 | 35 | |
| paul@550 | 36 | /* Collection definitions. */ |
| paul@550 | 37 | |
| paul@550 | 38 | typedef std::set<l4_cap_idx_t> Capabilities; |
| paul@550 | 39 | |
| paul@550 | 40 | |
| paul@550 | 41 | |
| paul@366 | 42 | /* A simple system pager also acting as a region mapper. */ |
| paul@366 | 43 | |
| paul@484 | 44 | class ExternalPager : public ExecPager, public ParentPagerObject, |
| paul@543 | 45 | public Resource |
| paul@366 | 46 | { |
| paul@492 | 47 | protected: |
| paul@550 | 48 | /* Dataspace capabilities associated with regions. */ |
| paul@550 | 49 | |
| paul@550 | 50 | Capabilities _dataspaces; |
| paul@504 | 51 | |
| paul@504 | 52 | /* Resources associated with the created process. */ |
| paul@504 | 53 | |
| paul@504 | 54 | l4_cap_idx_t _task = L4_INVALID_CAP, _mapped_task = L4_INVALID_CAP, |
| paul@543 | 55 | _thread = L4_INVALID_CAP, _mapped_thread = L4_INVALID_CAP, |
| paul@504 | 56 | _parent = L4_INVALID_CAP, _mapped_parent = L4_INVALID_CAP, |
| paul@543 | 57 | _pager = L4_INVALID_CAP, _mapped_pager = L4_INVALID_CAP; |
| paul@543 | 58 | |
| paul@543 | 59 | ProcessMonitor *_monitor = NULL; |
| paul@492 | 60 | |
| paul@504 | 61 | /* Resources supporting the internal pager. */ |
| paul@504 | 62 | |
| paul@504 | 63 | ExplicitSegment *_rm_stack = NULL; |
| paul@504 | 64 | Payload *_rm_payload = NULL; |
| paul@504 | 65 | |
| paul@366 | 66 | public: |
| paul@431 | 67 | explicit ExternalPager(address_t start = 0, address_t end = 0); |
| paul@366 | 68 | |
| paul@489 | 69 | /* Server details. */ |
| paul@489 | 70 | |
| paul@489 | 71 | virtual ipc_server_default_config_type config(); |
| paul@489 | 72 | |
| paul@489 | 73 | virtual void *interface() |
| paul@489 | 74 | { return static_cast<ParentPagerObject *>(this); } |
| paul@489 | 75 | |
| paul@543 | 76 | /* Capability management. */ |
| paul@492 | 77 | |
| paul@503 | 78 | virtual void set_pager(l4_cap_idx_t cap, l4_cap_idx_t mapped_cap); |
| paul@503 | 79 | virtual void set_parent(l4_cap_idx_t cap, l4_cap_idx_t mapped_cap); |
| paul@503 | 80 | virtual void set_task(l4_cap_idx_t cap, l4_cap_idx_t mapped_cap); |
| paul@543 | 81 | virtual void set_thread(l4_cap_idx_t cap, l4_cap_idx_t mapped_cap); |
| paul@543 | 82 | |
| paul@543 | 83 | /* Lifecycle management. */ |
| paul@543 | 84 | |
| paul@543 | 85 | virtual void set_monitor(ProcessMonitor *monitor); |
| paul@492 | 86 | |
| paul@504 | 87 | /* Internal pager resource management. */ |
| paul@504 | 88 | |
| paul@504 | 89 | virtual void set_payload(Payload *payload); |
| paul@504 | 90 | virtual void set_stack(ExplicitSegment *stack); |
| paul@504 | 91 | |
| paul@492 | 92 | /* Resource methods. */ |
| paul@492 | 93 | |
| paul@492 | 94 | virtual void close(); |
| paul@492 | 95 | |
| paul@366 | 96 | /* Notification methods, implementing PagerObject. */ |
| paul@366 | 97 | |
| paul@366 | 98 | virtual long exception(l4_exc_regs_t regs, |
| paul@366 | 99 | l4_snd_fpage_t *region); |
| paul@366 | 100 | |
| paul@366 | 101 | virtual long page_fault(l4_umword_t pfa, l4_umword_t pc, |
| paul@366 | 102 | l4_snd_fpage_t *region); |
| paul@366 | 103 | |
| paul@366 | 104 | /* Region manager/mapper methods. */ |
| paul@366 | 105 | |
| paul@631 | 106 | virtual long attach(address_t *start, address_t size, rm_flags_t flags, |
| paul@631 | 107 | l4_cap_idx_t ds, rm_offset_t offset, unsigned char align); |
| paul@469 | 108 | |
| paul@469 | 109 | /* Parent methods. */ |
| paul@469 | 110 | |
| paul@469 | 111 | virtual long signal(unsigned long sig, unsigned long val); |
| paul@366 | 112 | }; |
| paul@366 | 113 | |
| paul@366 | 114 | /* vim: tabstop=2 expandtab shiftwidth=2 |
| paul@366 | 115 | */ |
