mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-12-04 23:39:24 +00:00
145 lines
5.4 KiB
C++
145 lines
5.4 KiB
C++
/*
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* Copyright (c) 2018-2020 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <mesosphere.hpp>
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namespace ams::kern {
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namespace {
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template<typename F>
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ALWAYS_INLINE void DoOnEachCoreInOrder(s32 core_id, F f) {
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cpu::SynchronizeAllCores();
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for (size_t i = 0; i < cpu::NumCores; i++) {
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if (static_cast<s32>(i) == core_id) {
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f();
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}
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cpu::SynchronizeAllCores();
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}
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}
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}
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NORETURN void HorizonKernelMain(s32 core_id) {
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/* Setup the Core Local Region, and note that we're initializing. */
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Kernel::InitializeCoreLocalRegion(core_id);
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Kernel::SetState(Kernel::State::Initializing);
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/* Ensure that all cores get to this point before proceeding. */
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cpu::SynchronizeAllCores();
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/* Initialize the main and idle thread for each core. */
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DoOnEachCoreInOrder(core_id, [=]() ALWAYS_INLINE_LAMBDA {
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Kernel::InitializeMainAndIdleThreads(core_id);
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});
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if (core_id == 0) {
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/* Initialize the carveout and the system resource limit. */
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KSystemControl::InitializePhase1();
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/* Initialize the memory manager and the KPageBuffer slabheap. */
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{
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const auto &metadata_region = KMemoryLayout::GetMetadataPoolRegion();
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Kernel::GetMemoryManager().Initialize(metadata_region.GetAddress(), metadata_region.GetSize());
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init::InitializeKPageBufferSlabHeap();
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}
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/* Copy the Initial Process Binary to safe memory. */
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CopyInitialProcessBinaryToKernelMemory();
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/* Print out information about the kernel. */
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Kernel::PrintLayout();
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/* Initialize the KObject Slab Heaps. */
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init::InitializeSlabHeaps();
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/* Initialize the Dynamic Slab Heaps. */
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{
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const auto &pt_heap_region = KMemoryLayout::GetPageTableHeapRegion();
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Kernel::InitializeResourceManagers(pt_heap_region.GetAddress(), pt_heap_region.GetSize());
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}
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}
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/* Initialize the supervisor page table for each core. */
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DoOnEachCoreInOrder(core_id, [=]() ALWAYS_INLINE_LAMBDA {
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KPageTable::Initialize(core_id);
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Kernel::GetKernelPageTable().Initialize(core_id);
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});
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/* Activate the supervisor page table for each core. */
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DoOnEachCoreInOrder(core_id, [=]() ALWAYS_INLINE_LAMBDA {
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Kernel::GetKernelPageTable().ActivateForInit();
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});
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/* NOTE: Kernel calls on each core a nullsub here on retail kernel. */
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/* Register the main/idle threads and initialize the interrupt task manager. */
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DoOnEachCoreInOrder(core_id, [=]() ALWAYS_INLINE_LAMBDA {
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KThread::Register(std::addressof(Kernel::GetMainThread(core_id)));
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KThread::Register(std::addressof(Kernel::GetIdleThread(core_id)));
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Kernel::GetInterruptTaskManager().Initialize();
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});
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/* Activate the scheduler and enable interrupts. */
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DoOnEachCoreInOrder(core_id, [=]() ALWAYS_INLINE_LAMBDA {
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Kernel::GetScheduler().Activate();
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KInterruptManager::EnableInterrupts();
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});
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/* Initialize cpu interrupt threads. */
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cpu::InitializeInterruptThreads(core_id);
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/* Initialize the DPC manager. */
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KDpcManager::Initialize();
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cpu::SynchronizeAllCores();
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/* Perform more core-0 specific initialization. */
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if (core_id == 0) {
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/* Initialize the exit worker manager, so that threads and processes may exit cleanly. */
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Kernel::GetWorkerTaskManager(KWorkerTaskManager::WorkerType_Exit).Initialize(KWorkerTaskManager::WorkerType_Exit, KWorkerTaskManager::ExitWorkerPriority);
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/* Setup so that we may sleep later, and reserve memory for secure applets. */
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KSystemControl::InitializePhase2();
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/* Initialize the SMMU. */
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KDeviceAddressSpace::Initialize();
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/* Load the initial processes. */
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CreateAndRunInitialProcesses();
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/* We're done initializing! */
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Kernel::SetState(Kernel::State::Initialized);
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/* Resume all threads suspended while we initialized. */
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KThread::ResumeThreadsSuspendedForInit();
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}
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cpu::SynchronizeAllCores();
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/* Set the current thread priority to idle. */
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GetCurrentThread().SetPriorityToIdle();
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/* Exit the main thread. */
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{
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auto &main_thread = Kernel::GetMainThread(core_id);
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main_thread.Open();
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main_thread.Exit();
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}
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/* Main() is done, and we should never get to this point. */
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MESOSPHERE_PANIC("Main Thread continued after exit.");
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while (true) { /* ... */ }
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}
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}
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