Atmosphere/libraries/libmesosphere/source/kern_main.cpp

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