kern: skeleton enough types to init KCoreLocalRegion in main()

libraries/libmesosphere/source/arch/arm64/kern_k_hardware_timer.cpp

@@ -0,0 +1,24 @@
+/*
+ * 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::arm64 {
+
+    void KHardwareTimer::DoTask() {
+        /* TODO: Actually implement this. */
+    }
+
+}

libraries/libmesosphere/source/kern_k_interrupt_task_manager.cpp

@@ -0,0 +1,40 @@
+/*
+ * 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 {
+
+    void KInterruptTaskManager::TaskQueue::Enqueue(KInterruptTask *task) {
+        /* Insert the task into the queue. */
+        if (this->tail != nullptr) {
+            this->tail->SetNextTask(task);
+        } else {
+            this->head = task;
+        }
+
+        this->tail = task;
+    }
+
+    void KInterruptTaskManager::TaskQueue::Dequeue() {
+        if (this->head == this->tail) {
+            this->head = nullptr;
+            this->tail = nullptr;
+        } else {
+            this->head = this->head->GetNextTask();
+        }
+    }
+
+}

libraries/libmesosphere/source/kern_k_scheduler.cpp

@@ -17,20 +17,15 @@
 
 namespace ams::kern {
 
-    WEAK_SYMBOL KScopedInterruptDisable::KScopedInterruptDisable() {
-        /* TODO: Disable interrupts. */
-    }
-
-    WEAK_SYMBOL KScopedInterruptDisable::~KScopedInterruptDisable() {
-        /* TODO: un-disable interrupts. */
-    }
-
-    WEAK_SYMBOL KScopedInterruptEnable::KScopedInterruptEnable() {
-        /* TODO: Enable interrupts. */
-    }
-
-    WEAK_SYMBOL KScopedInterruptEnable::~KScopedInterruptEnable() {
-        /* TODO: un-enable interrupts. */
+    KScheduler::KScheduler()
+        : is_active(false), core_id(0), prev_thread(nullptr), last_context_switch_time(0), idle_thread(nullptr)
+    {
+        this->state.needs_scheduling = true;
+        this->state.interrupt_task_thread_runnable = false;
+        this->state.should_count_idle = false;
+        this->state.idle_count = 0;
+        this->state.idle_thread_stack = nullptr;
+        this->state.highest_priority_thread = nullptr;
     }
 
 }

libraries/libmesosphere/source/kern_kernel.cpp

@@ -0,0 +1,49 @@
+/*
+ * 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 {
+
+    NOINLINE void Kernel::Initialize(s32 core_id) {
+        /* Construct the core local region object in place. */
+        KCoreLocalContext *clc = GetPointer<KCoreLocalContext>(KMemoryLayout::GetCoreLocalRegionAddress());
+        new (clc) KCoreLocalContext;
+
+        /* Set the core local region address into the global register. */
+        cpu::SetCoreLocalRegionAddress(reinterpret_cast<uintptr_t>(clc));
+
+        /* Initialize current context. */
+        clc->current.current_thread = nullptr;
+        clc->current.current_process = nullptr;
+        clc->current.scheduler = std::addressof(clc->scheduler);
+        clc->current.interrupt_task_manager = std::addressof(clc->interrupt_task_manager);
+        clc->current.core_id = core_id;
+        clc->current.exception_stack_bottom = GetVoidPointer(KMemoryLayout::GetExceptionStackBottomAddress(core_id));
+
+        /* Clear debugging counters. */
+        clc->num_sw_interrupts = 0;
+        clc->num_hw_interrupts = 0;
+        clc->num_svc = 0;
+        clc->num_process_switches = 0;
+        clc->num_thread_switches = 0;
+        clc->num_fpu_switches = 0;
+
+        for (size_t i = 0; i < util::size(clc->perf_counters); i++) {
+            clc->perf_counters[i] = 0;
+        }
+    }
+
+}

libraries/libmesosphere/source/kern_main.cpp

@@ -18,7 +18,14 @@
 namespace ams::kern {
 
     NORETURN void HorizonKernelMain(s32 core_id) {
+        /* Setup the Core Local Region, and note that we're initializing. */
+        Kernel::Initialize(core_id);
+        Kernel::SetState(Kernel::State::Initializing);
+
+        /* Ensure that all cores get to this point before proceeding. */
         cpu::SynchronizeAllCores();
+
+        /* TODO: Implement more of Main() */
         while (true) { /* ... */ }
     }