kern/svc: implement IoPool/Region svc support

libraries/libmesosphere/include/mesosphere/kern_k_io_region.hpp

@@ -0,0 +1,66 @@
+/*
+ * 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/>.
+ */
+#pragma once
+#include <mesosphere/kern_common.hpp>
+#include <mesosphere/kern_k_auto_object.hpp>
+#include <mesosphere/kern_slab_helpers.hpp>
+
+namespace ams::kern {
+
+    class KProcess;
+    class KIoPool;
+
+    class KIoRegion final : public KAutoObjectWithSlabHeapAndContainer<KIoRegion, KAutoObjectWithList> {
+        MESOSPHERE_AUTOOBJECT_TRAITS(KIoRegion, KAutoObject);
+        private:
+            friend class KProcess;
+            friend class KIoPool;
+        private:
+            KLightLock m_lock;
+            KIoPool *m_pool;
+            KPhysicalAddress m_physical_address;
+            size_t m_size;
+            ams::svc::MemoryMapping m_mapping;
+            ams::svc::MemoryPermission m_perm;
+            bool m_is_initialized;
+            bool m_is_mapped;
+            util::IntrusiveListNode m_process_list_node;
+            util::IntrusiveListNode m_pool_list_node;
+        public:
+            explicit KIoRegion()
+                : m_lock(), m_pool(nullptr), m_is_initialized(false), m_process_list_node(), m_pool_list_node()
+            {
+                /* ... */
+            }
+
+            Result Initialize(KIoPool *pool, KPhysicalAddress phys_addr, size_t size, ams::svc::MemoryMapping mapping, ams::svc::MemoryPermission perm);
+            virtual void Finalize() override;
+
+            virtual bool IsInitialized() const override { return m_is_initialized; }
+            static void PostDestroy(uintptr_t arg) { MESOSPHERE_UNUSED(arg); /* ... */ }
+
+            Result Map(KProcessAddress address, size_t size, ams::svc::MemoryPermission map_perm);
+            Result Unmap(KProcessAddress address, size_t size);
+
+            bool Overlaps(KPhysicalAddress address, size_t size) const {
+                return m_physical_address <= (address + size - 1) && address <= (m_physical_address + m_size - 1);
+            }
+
+            ALWAYS_INLINE KPhysicalAddress GetAddress() const { return m_physical_address; }
+            ALWAYS_INLINE size_t GetSize() const { return m_size; }
+    };
+
+}