2014-07-05 06:55:39 +02:00
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// Copyright 2014 Citra Emulator Project
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2014-12-17 06:38:14 +01:00
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// Licensed under GPLv2 or any later version
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2014-11-19 09:49:13 +01:00
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// Refer to the license.txt file included.
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2014-07-05 06:55:39 +02:00
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2018-07-31 14:06:09 +02:00
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#include "common/assert.h"
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2020-04-09 00:53:52 +02:00
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#include "core/core.h"
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2021-02-13 02:58:31 +01:00
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#include "core/hle/kernel/k_page_table.h"
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2021-02-05 02:06:54 +01:00
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#include "core/hle/kernel/k_scoped_resource_reservation.h"
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2021-02-06 08:14:31 +01:00
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#include "core/hle/kernel/k_shared_memory.h"
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2018-09-25 02:01:45 +02:00
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#include "core/hle/kernel/kernel.h"
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2014-07-05 06:55:39 +02:00
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namespace Kernel {
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2021-02-06 08:14:31 +01:00
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KSharedMemory::KSharedMemory(KernelCore& kernel, Core::DeviceMemory& device_memory)
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2020-04-09 00:53:52 +02:00
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: Object{kernel}, device_memory{device_memory} {}
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2018-08-03 05:37:44 +02:00
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2021-02-06 08:14:31 +01:00
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KSharedMemory::~KSharedMemory() {
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2021-02-13 01:05:24 +01:00
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kernel.GetSystemResourceLimit()->Release(LimitableResource::PhysicalMemory, size);
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}
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2018-08-03 05:37:44 +02:00
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2021-02-06 08:14:31 +01:00
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std::shared_ptr<KSharedMemory> KSharedMemory::Create(
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2020-04-09 00:53:52 +02:00
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KernelCore& kernel, Core::DeviceMemory& device_memory, Process* owner_process,
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2021-02-13 02:26:01 +01:00
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KPageLinkedList&& page_list, KMemoryPermission owner_permission,
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KMemoryPermission user_permission, PAddr physical_address, std::size_t size, std::string name) {
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2014-07-05 06:55:39 +02:00
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2021-02-05 02:06:54 +01:00
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const auto resource_limit = kernel.GetSystemResourceLimit();
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KScopedResourceReservation memory_reservation(resource_limit, LimitableResource::PhysicalMemory,
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size);
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ASSERT(memory_reservation.Succeeded());
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2021-02-06 08:14:31 +01:00
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std::shared_ptr<KSharedMemory> shared_memory{
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std::make_shared<KSharedMemory>(kernel, device_memory)};
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2016-05-09 00:10:53 +02:00
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2020-04-09 00:53:52 +02:00
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shared_memory->owner_process = owner_process;
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shared_memory->page_list = std::move(page_list);
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shared_memory->owner_permission = owner_permission;
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shared_memory->user_permission = user_permission;
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shared_memory->physical_address = physical_address;
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2016-05-09 00:10:53 +02:00
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shared_memory->size = size;
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shared_memory->name = name;
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2016-05-09 00:10:53 +02:00
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2021-02-05 02:06:54 +01:00
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memory_reservation.Commit();
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2016-05-09 00:10:53 +02:00
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return shared_memory;
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}
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ResultCode KSharedMemory::Map(Process& target_process, VAddr address, std::size_t size,
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KMemoryPermission permissions) {
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const u64 page_count{(size + PageSize - 1) / PageSize};
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2016-04-18 04:58:51 +02:00
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2020-04-09 00:53:52 +02:00
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if (page_list.GetNumPages() != page_count) {
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UNIMPLEMENTED_MSG("Page count does not match");
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}
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2015-12-31 15:46:32 +01:00
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2021-02-13 02:02:51 +01:00
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const KMemoryPermission expected =
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&target_process == owner_process ? owner_permission : user_permission;
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2015-05-11 00:47:07 +02:00
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2020-04-24 00:42:11 +02:00
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if (permissions != expected) {
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2020-04-17 06:59:08 +02:00
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UNIMPLEMENTED_MSG("Permission does not match");
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2016-04-19 18:59:44 +02:00
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}
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2014-07-05 16:22:03 +02:00
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2021-02-13 02:02:51 +01:00
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return target_process.PageTable().MapPages(address, page_list, KMemoryState::Shared,
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2020-04-24 00:42:11 +02:00
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permissions);
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2018-11-19 15:00:32 +01:00
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}
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2017-10-01 20:57:50 +02:00
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} // namespace Kernel
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