Kernel/AML: General cleanup and compliance improvements

This doesn't currently make the interpreter any better, but it will make
further implementation easier to be spec (or hardware...) compliant

BAN/include/BAN/Formatter.h

@@ -11,21 +11,21 @@ namespace BAN::Formatter
 	struct ValueFormat;
 
 	template<typename F>
-	static void print(F putc, const char* format);
+	inline void print(F putc, const char* format);
 
 	template<typename F, typename Arg, typename... Args>
-	static void print(F putc, const char* format, Arg&& arg, Args&&... args);
+	inline void print(F putc, const char* format, Arg&& arg, Args&&... args);
 
 	template<typename F, typename... Args>
-	static void println(F putc, const char* format, Args&&... args);
+	inline void println(F putc, const char* format, Args&&... args);
 
 	template<typename F, typename T>
-	static void print_argument(F putc, T value, const ValueFormat& format);
+	inline void print_argument(F putc, T value, const ValueFormat& format);
 
 	namespace detail
 	{
 		template<typename F, typename T>
-		static size_t parse_format_and_print_argument(F putc, const char* format, T&& arg);
+		inline size_t parse_format_and_print_argument(F putc, const char* format, T&& arg);
 	}
 
 	/*
@@ -44,7 +44,7 @@ namespace BAN::Formatter
 	};
 
 	template<typename F>
-	void print(F putc, const char* format)
+	inline void print(F putc, const char* format)
 	{
 		while (*format)
 		{
@@ -54,7 +54,7 @@ namespace BAN::Formatter
 	}
 
 	template<typename F, typename Arg, typename... Args>
-	void print(F putc, const char* format, Arg&& arg, Args&&... args)
+	inline void print(F putc, const char* format, Arg&& arg, Args&&... args)
 	{
 		while (*format && *format != '{')
 		{
@@ -72,7 +72,7 @@ namespace BAN::Formatter
 	}
 
 	template<typename F, typename... Args>
-	void println(F putc, const char* format, Args&&... args)
+	inline void println(F putc, const char* format, Args&&... args)
 	{
 		print(putc, format, args...);
 		putc('\n');
@@ -82,7 +82,7 @@ namespace BAN::Formatter
 	{
 
 		template<typename F, typename Arg>
-		size_t parse_format_and_print_argument(F putc, const char* format, Arg&& argument)
+		inline size_t parse_format_and_print_argument(F putc, const char* format, Arg&& argument)
 		{
 			ValueFormat value_format;
 
@@ -150,7 +150,7 @@ namespace BAN::Formatter
 			return i + 1;
 		}
 
-		static char value_to_base_char(uint8_t value, int base, bool upper)
+		inline char value_to_base_char(uint8_t value, int base, bool upper)
 		{
 			if (base <= 10)
 				return value + '0';
@@ -164,7 +164,7 @@ namespace BAN::Formatter
 		}
 
 		template<typename F, typename T>
-		void print_integer(F putc, T value, const ValueFormat& format)
+		inline void print_integer(F putc, T value, const ValueFormat& format)
 		{
 			if (value == 0)
 			{
@@ -205,7 +205,7 @@ namespace BAN::Formatter
 		}
 
 		template<typename F, typename T>
-		void print_floating(F putc, T value, const ValueFormat& format)
+		inline void print_floating(F putc, T value, const ValueFormat& format)
 		{
 			int64_t int_part = (int64_t)value;
 			T frac_part = value - (T)int_part;
@@ -228,7 +228,7 @@ namespace BAN::Formatter
 		}
 
 		template<typename F>
-		void print_pointer(F putc, void* ptr, const ValueFormat& format)
+		inline void print_pointer(F putc, void* ptr, const ValueFormat& format)
 		{
 			uintptr_t value = (uintptr_t)ptr;
 			print(putc, "0x");
@@ -244,13 +244,13 @@ namespace BAN::Formatter
 
 	*/
 
-	template<typename F, integral		T> void print_argument(F putc, T value, const ValueFormat& format) { detail::print_integer(putc, value, format); }
-	template<typename F, floating_point	T> void print_argument(F putc, T value, const ValueFormat& format) { detail::print_floating(putc, value, format); }
-	template<typename F, pointer		T> void print_argument(F putc, T value, const ValueFormat& format) { detail::print_pointer(putc, (void*)value, format); }
+	template<typename F, integral		T> inline void print_argument(F putc, T value, const ValueFormat& format) { detail::print_integer(putc, value, format); }
+	template<typename F, floating_point	T> inline void print_argument(F putc, T value, const ValueFormat& format) { detail::print_floating(putc, value, format); }
+	template<typename F, pointer		T> inline void print_argument(F putc, T value, const ValueFormat& format) { detail::print_pointer(putc, (void*)value, format); }
 
-	template<typename F> void print_argument(F putc, char			value, const ValueFormat&)	{ putc(value); }
-	template<typename F> void print_argument(F putc, bool			value, const ValueFormat&)	{ print(putc, value ? "true" : "false"); }
-	template<typename F> void print_argument(F putc, const char*	value, const ValueFormat&)	{ print(putc, value); }
-	template<typename F> void print_argument(F putc, char*			value, const ValueFormat&)	{ print(putc, value); }
+	template<typename F> inline void print_argument(F putc, char			value, const ValueFormat&)	{ putc(value); }
+	template<typename F> inline void print_argument(F putc, bool			value, const ValueFormat&)	{ print(putc, value ? "true" : "false"); }
+	template<typename F> inline void print_argument(F putc, const char*	value, const ValueFormat&)	{ print(putc, value); }
+	template<typename F> inline void print_argument(F putc, char*			value, const ValueFormat&)	{ print(putc, value); }
 
 }

kernel/CMakeLists.txt

@@ -3,6 +3,7 @@ set(KERNEL_SOURCES
 	kernel/ACPI/ACPI.cpp
 	kernel/ACPI/AML.cpp
 	kernel/ACPI/AML/Field.cpp
+	kernel/ACPI/AML/Integer.cpp
 	kernel/ACPI/AML/NamedObject.cpp
 	kernel/ACPI/AML/Namespace.cpp
 	kernel/ACPI/AML/Node.cpp

kernel/include/kernel/ACPI/AML/Alias.h

@@ -7,7 +7,7 @@
 namespace Kernel::ACPI::AML
 {
 
-	struct Alias : public AML::NamedObject
+	struct Alias final : public AML::NamedObject
 	{
 		BAN::RefPtr<AML::Node> target;
 
@@ -16,16 +16,27 @@ namespace Kernel::ACPI::AML
 			, target(target)
 		{}
 
+		BAN::RefPtr<AML::Node> to_underlying() override { return target; }
+
 		bool is_scope() const override { return target->is_scope(); }
 
-		BAN::RefPtr<Node> copy() override { return target->copy(); }
+		BAN::RefPtr<AML::Node> convert(uint8_t mask) override
+		{
+			ASSERT(target);
+			return target->convert(mask);
+		}
 
-		BAN::RefPtr<AML::Buffer> as_buffer() override { return target->as_buffer(); }
-		BAN::RefPtr<AML::Integer> as_integer() override { return target->as_integer(); }
-		BAN::RefPtr<AML::String> as_string() override { return target->as_string(); }
+		BAN::RefPtr<Node> copy() override
+		{
+			ASSERT(target);
+			return target->copy();
+		}
 
-		BAN::RefPtr<AML::Node> evaluate() override { return target->evaluate(); }
-		bool store(BAN::RefPtr<AML::Node> node) override { return target->store(node); }
+		BAN::RefPtr<AML::Node> store(BAN::RefPtr<AML::Node> node) override
+		{
+			ASSERT(target);
+			return target->store(node);
+		}
 
 		static ParseResult parse(ParseContext& context)
 		{
@@ -38,17 +49,17 @@ namespace Kernel::ACPI::AML
 				return ParseResult::Failure;
 
 			auto source_object = AML::Namespace::root_namespace()->find_object(context.scope, source_string.value(), AML::Namespace::FindMode::Normal);
-			if (!source_object)
-			{
-				AML_ERROR("Alias target could not be found");
-				return ParseResult::Failure;
-			}
-
 			auto alias_string = AML::NameString::parse(context.aml_data);
 			if (!alias_string.has_value())
 				return ParseResult::Failure;
 
-			auto alias = MUST(BAN::RefPtr<Alias>::create(alias_string.value().path.back(), source_object));
+			if (!source_object)
+			{
+				AML_PRINT("Alias target could not be found");
+				return ParseResult::Success;
+			}
+
+			auto alias = MUST(BAN::RefPtr<Alias>::create(alias_string.value().path.back(), source_object->to_underlying()));
 			if (!Namespace::root_namespace()->add_named_object(context, alias_string.value(), alias))
 				return ParseResult::Success;
 

kernel/include/kernel/ACPI/AML/Buffer.h

@@ -10,7 +10,7 @@
 namespace Kernel::ACPI::AML
 {
 
-	struct Buffer : public AML::Node
+	struct Buffer final : public AML::Node
 	{
 		BAN::Vector<uint8_t> buffer;
 
@@ -20,10 +20,10 @@ namespace Kernel::ACPI::AML
 
 		BAN::Optional<bool> logical_compare(BAN::RefPtr<AML::Node> node, AML::Byte binaryop)
 		{
-			auto rhs = node ? node->as_buffer() : BAN::RefPtr<AML::Buffer>();
-			if (!rhs)
+			auto rhs_node = node ? node->convert(AML::Node::ConvBuffer) : BAN::RefPtr<AML::Node>();
+			if (!rhs_node)
 			{
-				AML_ERROR("Buffer logical compare RHS is not buffer");
+				AML_ERROR("Buffer logical compare RHS cannot be converted to buffer");
 				return {};
 			}
 
@@ -32,18 +32,34 @@ namespace Kernel::ACPI::AML
 			return {};
 		}
 
-		BAN::RefPtr<AML::Buffer> as_buffer() override { return this; }
-
-		BAN::RefPtr<AML::Integer> as_integer() override
+		BAN::RefPtr<AML::Node> convert(uint8_t mask) override
 		{
-			uint64_t value = 0;
-			for (size_t i = 0; i < BAN::Math::min<size_t>(buffer.size(), 8); i++)
-				value |= static_cast<uint64_t>(buffer[i]) << (8 * i);
-			return MUST(BAN::RefPtr<Integer>::create(value));
+			if (mask & AML::Node::ConvBuffer)
+				return this;
+			if (mask & AML::Node::ConvInteger)
+				return as_integer();
+			if (mask & AML::Node::ConvString)
+			{
+				AML_TODO("Convert BufferField to String");
+				return {};
+			}
+			return {};
 		}
 
-		BAN::RefPtr<AML::Node> evaluate() override
+		BAN::RefPtr<AML::Node> store(BAN::RefPtr<AML::Node> node) override
 		{
+			ASSERT(node);
+			auto conv_node = node->convert(AML::Node::ConvBuffer);
+			if (!conv_node)
+			{
+				AML_ERROR("Buffer store could not convert to buffer");
+				return {};
+			}
+
+			auto& conv_buffer = static_cast<AML::Buffer*>(conv_node.ptr())->buffer;
+			MUST(buffer.resize(conv_buffer.size()));
+			for (size_t i = 0; i < buffer.size(); i++)
+				buffer[i] = conv_buffer[i];
 			return this;
 		}
 
@@ -60,15 +76,21 @@ namespace Kernel::ACPI::AML
 			auto buffer_context = context;
 			buffer_context.aml_data = buffer_pkg.value();
 
-			auto buffer_size_object = AML::parse_object(buffer_context);
-			if (!buffer_size_object.success())
+			auto buffer_size_result = AML::parse_object(buffer_context);
+			if (!buffer_size_result.success())
 				return ParseResult::Failure;
 
-			auto buffer_size = buffer_size_object.node()->as_integer();
-			if (!buffer_size)
+			auto buffer_size_node = buffer_size_result.node() ? buffer_size_result.node()->convert(AML::Node::ConvInteger) : BAN::RefPtr<AML::Node>();
+			if (!buffer_size_node)
+			{
+				AML_ERROR("Buffer size is not an integer");
 				return ParseResult::Failure;
+			}
 
-			uint32_t actual_buffer_size = BAN::Math::max<uint32_t>(buffer_size->value, buffer_context.aml_data.size());
+			const uint32_t actual_buffer_size = BAN::Math::max<uint32_t>(
+				static_cast<AML::Integer*>(buffer_size_node.ptr())->value,
+				buffer_context.aml_data.size()
+			);
 
 			auto buffer = MUST(BAN::RefPtr<Buffer>::create());
 			MUST(buffer->buffer.resize(actual_buffer_size, 0));
@@ -88,9 +110,18 @@ namespace Kernel::ACPI::AML
 			AML_DEBUG_PRINT_INDENT(indent);
 			AML_DEBUG_PRINT("Buffer ({} bytes)", buffer.size());
 		}
+
+	private:
+		BAN::RefPtr<AML::Integer> as_integer()
+		{
+			uint64_t value = 0;
+			for (size_t i = 0; i < BAN::Math::min<size_t>(buffer.size(), 8); i++)
+				value |= static_cast<uint64_t>(buffer[i]) << (8 * i);
+			return MUST(BAN::RefPtr<Integer>::create(value));
+		}
 	};
 
-	struct BufferField : AML::NamedObject
+	struct BufferField final : AML::NamedObject
 	{
 		BAN::RefPtr<AML::Node> buffer;
 		size_t field_bit_offset;
@@ -104,7 +135,159 @@ namespace Kernel::ACPI::AML
 			, field_bit_size(field_bit_size)
 		{}
 
-		BAN::RefPtr<AML::Integer> as_integer() override
+		BAN::RefPtr<AML::Node> convert(uint8_t mask) override
+		{
+			if (mask & AML::Node::ConvBufferField)
+				return this;
+			if (mask & AML::Node::ConvInteger)
+				return as_integer();
+			if (mask & AML::Node::ConvBuffer)
+			{
+				AML_TODO("Convert BufferField to Buffer");
+				return {};
+			}
+			if (mask & AML::Node::ConvString)
+			{
+				AML_TODO("Convert BufferField to String");
+				return {};
+			}
+			return {};
+		}
+
+		BAN::RefPtr<AML::Node> store(BAN::RefPtr<AML::Node> node) override
+		{
+			ASSERT(buffer);
+			ASSERT(buffer->type == AML::Node::Type::Buffer || buffer->type == AML::Node::Type::String);
+			auto& buffer = (this->buffer->type == AML::Node::Type::Buffer)
+				? static_cast<AML::Buffer*>(this->buffer.ptr())->buffer
+				: static_cast<AML::String*>(this->buffer.ptr())->string;
+			ASSERT(field_bit_offset + field_bit_size <= buffer.size() * 8);
+
+			auto value_node = node ? node->convert(AML::Node::ConvInteger) : BAN::RefPtr<AML::Node>();
+			if (!value_node)
+				return {};
+			const auto value = static_cast<AML::Integer*>(value_node.ptr())->value;
+
+			// TODO: optimize for whole byte accesses
+			for (size_t i = 0; i < field_bit_size; i++)
+			{
+				const size_t bit = field_bit_offset + i;
+				buffer[bit / 8] &= ~(1 << (bit % 8));
+				buffer[bit / 8] |= ((value >> i) & 1) << (bit % 8);
+			}
+
+			return value_node;
+		}
+
+		static ParseResult parse(AML::ParseContext& context)
+		{
+			ASSERT(context.aml_data.size() >= 1);
+
+			bool offset_in_bytes;
+			size_t field_bit_size;
+			switch (static_cast<AML::Byte>(context.aml_data[0]))
+			{
+				case AML::Byte::CreateBitFieldOp:
+					field_bit_size = 1;
+					offset_in_bytes = false;
+					break;
+				case AML::Byte::CreateByteFieldOp:
+					field_bit_size = 8;
+					offset_in_bytes = true;
+					break;
+				case AML::Byte::CreateWordFieldOp:
+					field_bit_size = 16;
+					offset_in_bytes = true;
+					break;
+				case AML::Byte::CreateDWordFieldOp:
+					field_bit_size = 32;
+					offset_in_bytes = true;
+					break;
+				case AML::Byte::CreateQWordFieldOp:
+					field_bit_size = 64;
+					offset_in_bytes = true;
+					break;
+				case AML::Byte::ExtOpPrefix:
+					ASSERT(context.aml_data.size() >= 2);
+					ASSERT(static_cast<AML::ExtOp>(context.aml_data[1]) == AML::ExtOp::CreateFieldOp);
+					field_bit_size = 0;
+					offset_in_bytes = false;
+					break;
+				default:
+					ASSERT_NOT_REACHED();
+			}
+			context.aml_data = context.aml_data.slice(1 + (static_cast<AML::Byte>(context.aml_data[0]) == AML::Byte::ExtOpPrefix));
+
+			auto buffer_result = AML::parse_object(context);
+			if (!buffer_result.success())
+				return ParseResult::Failure;
+			auto buffer_node = buffer_result.node() ? buffer_result.node()->convert(AML::Node::ConvBuffer) : BAN::RefPtr<AML::Node>();
+			if (!buffer_node || buffer_node->type != Node::Type::Buffer)
+			{
+				AML_ERROR("Buffer source does not evaluate to a Buffer");
+				return ParseResult::Failure;
+			}
+			auto buffer = BAN::RefPtr<AML::Buffer>(static_cast<AML::Buffer*>(buffer_node.ptr()));
+
+			auto index_result = AML::parse_object(context);
+			if (!index_result.success())
+				return ParseResult::Failure;
+			auto index_node = index_result.node() ? index_result.node()->convert(AML::Node::ConvInteger) : BAN::RefPtr<AML::Node>();
+			if (!index_node)
+			{
+				AML_ERROR("Failed to parse index for BufferField");
+				return ParseResult::Failure;
+			}
+
+			if (field_bit_size == 0)
+			{
+				auto bit_count_result = AML::parse_object(context);
+				if (!bit_count_result.success())
+					return ParseResult::Failure;
+				auto bit_count_node = bit_count_result.node() ? bit_count_result.node()->convert(AML::Node::ConvInteger) : BAN::RefPtr<AML::Node>();
+				if (!bit_count_node)
+				{
+					AML_ERROR("Failed to parse bit count for BufferField");
+					return ParseResult::Failure;
+				}
+				field_bit_size = static_cast<AML::Integer*>(bit_count_node.ptr())->value;
+			}
+
+			auto field_name = AML::NameString::parse(context.aml_data);
+			if (!field_name.has_value())
+				return ParseResult::Failure;
+			if (field_name->path.empty())
+			{
+				AML_ERROR("Empty field name for BufferField");
+				return ParseResult::Failure;
+			}
+
+			size_t field_bit_offset = static_cast<AML::Integer*>(index_node.ptr())->value;
+			if (offset_in_bytes)
+				field_bit_offset *= 8;
+
+			auto field = MUST(BAN::RefPtr<BufferField>::create(field_name->path.back(), buffer, field_bit_offset, field_bit_size));
+			if (!Namespace::root_namespace()->add_named_object(context, field_name.value(), field))
+				return ParseResult::Success;
+
+#if AML_DEBUG_LEVEL >= 2
+			field->debug_print(0);
+			AML_DEBUG_PRINTLN("");
+#endif
+
+			return ParseResult::Success;
+		}
+
+		virtual void debug_print(int indent) const override
+		{
+			AML_DEBUG_PRINT_INDENT(indent);
+			AML_DEBUG_PRINT("BufferField {} at bit offset {} ({} bits) to { ", name, field_bit_offset, field_bit_size);
+			buffer->debug_print(0);
+			AML_DEBUG_PRINT(" }");
+		}
+
+	private:
+		BAN::RefPtr<AML::Integer> as_integer()
 		{
 			ASSERT(buffer);
 			ASSERT(buffer->type == AML::Node::Type::Buffer || buffer->type == AML::Node::Type::String);
@@ -124,150 +307,6 @@ namespace Kernel::ACPI::AML
 
 			return MUST(BAN::RefPtr<Integer>::create(value));
 		}
-
-		BAN::RefPtr<AML::Node> evaluate() override
-		{
-			ASSERT(buffer);
-			ASSERT(buffer->type == AML::Node::Type::Buffer || buffer->type == AML::Node::Type::String);
-			const auto& buffer = (this->buffer->type == AML::Node::Type::Buffer)
-				? static_cast<AML::Buffer*>(this->buffer.ptr())->buffer
-				: static_cast<AML::String*>(this->buffer.ptr())->string;
-			ASSERT(field_bit_offset + field_bit_size <= buffer.size() * 8);
-
-			uint64_t value = 0;
-
-			// TODO: optimize for whole byte accesses
-			for (size_t i = 0; i < field_bit_size; i++)
-			{
-				const size_t bit = field_bit_offset + i;
-				value |= static_cast<uint64_t>((buffer[bit / 8] >> (bit % 8)) & 1) << i;
-			}
-
-			return MUST(BAN::RefPtr<AML::Integer>::create(value));
-		}
-
-		bool store(BAN::RefPtr<AML::Node> node) override
-		{
-			ASSERT(buffer);
-			ASSERT(buffer->type == AML::Node::Type::Buffer || buffer->type == AML::Node::Type::String);
-			auto& buffer = (this->buffer->type == AML::Node::Type::Buffer)
-				? static_cast<AML::Buffer*>(this->buffer.ptr())->buffer
-				: static_cast<AML::String*>(this->buffer.ptr())->string;
-			ASSERT(field_bit_offset + field_bit_size <= buffer.size() * 8);
-
-			auto value = node->as_integer();
-			if (!value)
-				return false;
-
-			// TODO: optimize for whole byte accesses
-			for (size_t i = 0; i < field_bit_size; i++)
-			{
-				const size_t bit = field_bit_offset + 1;
-				buffer[bit / 8] &= ~(1 << (bit % 8));
-				buffer[bit / 8] |= ((value->value >> i) & 1) << (bit % 8);
-			}
-
-			return true;
-		}
-
-		static ParseResult parse(AML::ParseContext& context)
-		{
-			ASSERT(context.aml_data.size() >= 1);
-
-			size_t field_bit_size = 0;
-			switch (static_cast<AML::Byte>(context.aml_data[0]))
-			{
-				case AML::Byte::CreateBitFieldOp:
-					field_bit_size = 1;
-					break;
-				case AML::Byte::CreateByteFieldOp:
-					field_bit_size = 8;
-					break;
-				case AML::Byte::CreateWordFieldOp:
-					field_bit_size = 16;
-					break;
-				case AML::Byte::CreateDWordFieldOp:
-					field_bit_size = 32;
-					break;
-				case AML::Byte::CreateQWordFieldOp:
-					field_bit_size = 64;
-					break;
-				case AML::Byte::ExtOpPrefix:
-					ASSERT(context.aml_data.size() >= 2);
-					ASSERT(static_cast<AML::ExtOp>(context.aml_data[1]) == AML::ExtOp::CreateFieldOp);
-					break;
-				default:
-					ASSERT_NOT_REACHED();
-			}
-			context.aml_data = context.aml_data.slice(1 + (static_cast<AML::Byte>(context.aml_data[0]) == AML::Byte::ExtOpPrefix));
-
-			auto buffer_result = AML::parse_object(context);
-			if (!buffer_result.success())
-				return ParseResult::Failure;
-			auto buffer_node = buffer_result.node() ? buffer_result.node()->as_buffer() : BAN::RefPtr<AML::Buffer>();
-			if (!buffer_node || buffer_node->type != Node::Type::Buffer)
-			{
-				AML_ERROR("Buffer source does not evaluate to a Buffer");
-				return ParseResult::Failure;
-			}
-			auto buffer = BAN::RefPtr<AML::Buffer>(static_cast<AML::Buffer*>(buffer_node.ptr()));
-
-			auto index_result = AML::parse_object(context);
-			if (!index_result.success())
-				return ParseResult::Failure;
-			auto index = index_result.node() ? index_result.node()->as_integer() : BAN::RefPtr<AML::Integer>();
-			if (!index)
-			{
-				AML_ERROR("Failed to parse index for BufferField");
-				return ParseResult::Failure;
-			}
-			size_t field_bit_offset = index->value;
-			if (field_bit_size != 1)
-				field_bit_offset *= 8;
-
-			if (field_bit_size == 0)
-			{
-				auto bit_count_result = AML::parse_object(context);
-				if (!index_result.success())
-					return ParseResult::Failure;
-				auto bit_count = bit_count_result.node() ? bit_count_result.node()->as_integer() : BAN::RefPtr<AML::Integer>();
-				if (!bit_count)
-				{
-					AML_ERROR("Failed to parse bit count for BufferField");
-					return ParseResult::Failure;
-				}
-				field_bit_size = bit_count->value;
-			}
-
-			auto field_name = AML::NameString::parse(context.aml_data);
-			if (!field_name.has_value())
-				return ParseResult::Failure;
-			if (field_name->path.empty())
-			{
-				AML_ERROR("Empty field name for BufferField");
-				return ParseResult::Failure;
-			}
-
-			auto field = MUST(BAN::RefPtr<BufferField>::create(field_name->path.back(), buffer, field_bit_offset, field_bit_size));
-			if (!Namespace::root_namespace()->add_named_object(context, field_name.value(), field))
-				return ParseResult::Failure;
-
-#if AML_DEBUG_LEVEL >= 2
-			field->debug_print(0);
-			AML_DEBUG_PRINTLN("");
-#endif
-
-			return ParseResult::Success;
-		}
-
-		virtual void debug_print(int indent) const override
-		{
-			AML_DEBUG_PRINT_INDENT(indent);
-			AML_DEBUG_PRINT("BufferField {} at bit offset {} ({} bits) to { ", name, field_bit_offset, field_bit_size);
-			buffer->debug_print(0);
-			AML_DEBUG_PRINT(" }");
-		}
-
 	};
 
 }

kernel/include/kernel/ACPI/AML/Conversion.h

@@ -0,0 +1,92 @@
+#pragma once
+
+#include <kernel/ACPI/AML/Buffer.h>
+#include <kernel/ACPI/AML/Integer.h>
+#include <kernel/ACPI/AML/ParseContext.h>
+#include <kernel/ACPI/AML/String.h>
+
+namespace Kernel::ACPI::AML
+{
+
+	struct Conversion
+	{
+		static ParseResult parse(AML::ParseContext& context)
+		{
+			const auto opcode = static_cast<AML::Byte>(context.aml_data[0]);
+			context.aml_data = context.aml_data.slice(1);
+
+			switch (opcode)
+			{
+				case AML::Byte::ToIntegerOp:
+				case AML::Byte::ToBufferOp:
+				case AML::Byte::ToStringOp:
+					break;
+				default:
+					ASSERT_NOT_REACHED();
+			}
+
+			auto data_result = AML::parse_object(context);
+			if (!data_result.success())
+				return ParseResult::Failure;
+			auto data_node = data_result.node();
+			if (!data_node)
+			{
+				AML_ERROR("Conversion {2H} data could not be evaluated", static_cast<uint8_t>(opcode));
+				return ParseResult::Failure;
+			}
+
+			if (context.aml_data.size() < 1)
+			{
+				AML_ERROR("Conversion {2H} missing target", static_cast<uint8_t>(opcode));
+				return ParseResult::Failure;
+			}
+
+			BAN::RefPtr<AML::Node> target_node;
+			if (context.aml_data[0] == 0x00)
+				context.aml_data = context.aml_data.slice(1);
+			else
+			{
+				auto target_result = AML::parse_object(context);
+				if (!target_result.success())
+					return ParseResult::Failure;
+				target_node = target_result.node();
+				if (!target_node)
+				{
+					AML_ERROR("Conversion {2H} target invalid", static_cast<uint8_t>(opcode));
+					return ParseResult::Failure;
+				}
+			}
+
+			BAN::RefPtr<AML::Node> converted;
+			switch (opcode)
+			{
+				case AML::Byte::ToBufferOp:
+					converted = data_node->convert(AML::Node::ConvBuffer);
+					break;
+				case AML::Byte::ToIntegerOp:
+					converted = data_node->convert(AML::Node::ConvInteger);
+					break;
+				case AML::Byte::ToStringOp:
+					converted = data_node->convert(AML::Node::ConvString);
+					break;
+				default:
+					ASSERT_NOT_REACHED();
+			}
+
+			if (!converted)
+			{
+				AML_ERROR("Conversion {2H} could not convert from node type {}", static_cast<uint8_t>(opcode), static_cast<uint8_t>(data_node->type));
+				return ParseResult::Failure;
+			}
+
+			if (target_node && !target_node->store(converted))
+			{
+				AML_ERROR("Conversion {2H} failed to store converted value", static_cast<uint8_t>(opcode));
+				return ParseResult::Failure;
+			}
+
+			return ParseResult(converted);
+		}
+	};
+
+}

kernel/include/kernel/ACPI/AML/CopyObject.h

@@ -0,0 +1,68 @@
+#pragma once
+
+#include <kernel/ACPI/AML/Alias.h>
+#include <kernel/ACPI/AML/NamedObject.h>
+#include <kernel/ACPI/AML/ParseContext.h>
+#include <kernel/ACPI/AML/Register.h>
+
+namespace Kernel::ACPI::AML
+{
+
+	struct CopyObject
+	{
+		static ParseResult parse(ParseContext& context)
+		{
+			ASSERT(context.aml_data.size() >= 1);
+			ASSERT(static_cast<Byte>(context.aml_data[0]) == Byte::CopyObjectOp);
+			context.aml_data = context.aml_data.slice(1);
+
+			auto source_result = AML::parse_object(context);
+			if (!source_result.success())
+				return ParseResult::Failure;
+			auto source = source_result.node()
+				? source_result.node()->to_underlying()
+				: BAN::RefPtr<AML::Node>();
+			if (!source)
+			{
+				AML_ERROR("CopyObject source is null");
+				return ParseResult::Failure;
+			}
+
+			auto destination_result = AML::parse_object(context);
+			if (!destination_result.success())
+				return ParseResult::Failure;
+			auto destination = destination_result.node();
+			if (!destination)
+			{
+				AML_ERROR("CopyObject destination is null");
+				return ParseResult::Failure;
+			}
+
+#if AML_DEBUG_LEVEL >= 2
+			AML_DEBUG_PRINTLN("CopyObject {");
+			source->debug_print(1);
+			AML_DEBUG_PRINTLN("");
+			AML_DEBUG_PRINTLN("} to {");
+			destination->debug_print(1);
+			AML_DEBUG_PRINTLN("");
+			AML_DEBUG_PRINTLN("}");
+#endif
+
+			switch (destination->type)
+			{
+				case AML::Node::Type::Alias:
+					static_cast<AML::Alias*>(destination.ptr())->target = source->copy();
+					return source;
+				case AML::Node::Type::Name:
+					static_cast<AML::Name*>(destination.ptr())->object = source->copy();
+					return source;
+				case AML::Node::Type::Register:
+					static_cast<AML::Register*>(destination.ptr())->value = source->copy();
+					return source;
+				default:
+					ASSERT_NOT_REACHED();
+			}
+		}
+	};
+
+}

kernel/include/kernel/ACPI/AML/Device.h

@@ -8,12 +8,14 @@
 namespace Kernel::ACPI::AML
 {
 
-	struct Device : public AML::Scope
+	struct Device final : public AML::Scope
 	{
 		Device(NameSeg name)
 			: Scope(Node::Type::Device, name)
 		{}
 
+		BAN::RefPtr<AML::Node> convert(uint8_t) override { return {}; }
+
 		static ParseResult parse(ParseContext& context)
 		{
 			ASSERT(context.aml_data.size() >= 2);
@@ -31,7 +33,7 @@ namespace Kernel::ACPI::AML
 
 			auto device = MUST(BAN::RefPtr<Device>::create(name_string->path.back()));
 			if (!Namespace::root_namespace()->add_named_object(context, name_string.value(), device))
-				return ParseResult::Failure;
+				return ParseResult::Success;
 
 			return device->enter_context_and_parse_term_list(context, name_string.value(), device_pkg.value());
 		}

kernel/include/kernel/ACPI/AML/Event.h

@@ -10,7 +10,7 @@
 namespace Kernel::ACPI::AML
 {
 
-	struct Event : public AML::NamedObject
+	struct Event final : public AML::NamedObject
 	{
 		BAN::Atomic<uint32_t> signal_count { 0 };
 		ThreadBlocker thread_blocker;
@@ -19,6 +19,8 @@ namespace Kernel::ACPI::AML
 			: NamedObject(Node::Type::Event, name)
 		{}
 
+		BAN::RefPtr<AML::Node> convert(uint8_t) override { return {}; }
+
 		static ParseResult parse(ParseContext& context)
 		{
 			ASSERT(context.aml_data.size() >= 2);
@@ -43,7 +45,7 @@ namespace Kernel::ACPI::AML
 			if (!event_result.success())
 				return ParseResult::Failure;
 
-			auto general_node = event_result.node() ? event_result.node()->evaluate() : BAN::RefPtr<AML::Node>();
+			auto general_node = event_result.node();
 			if (!general_node || general_node->type != Node::Type::Event)
 			{
 				AML_ERROR("Release, Wait or Signal does not name an event");
@@ -58,12 +60,15 @@ namespace Kernel::ACPI::AML
 				if (!timeout_result.success())
 					return ParseResult::Failure;
 
-				auto timeout = timeout_result.node() ? timeout_result.node()->as_integer() : BAN::RefPtr<AML::Integer>();
-				if (!timeout)
+				auto timeout_node = timeout_result.node()
+					? timeout_result.node()->convert(AML::Node::ConvInteger)
+					: BAN::RefPtr<AML::Node>();
+				if (!timeout_node)
 				{
 					AML_ERROR("Wait timeout does not evaluate to integer");
 					return ParseResult::Failure;
 				}
+				const auto timeout_value = static_cast<AML::Integer*>(timeout_node.ptr())->value;
 
 				const uint64_t start_ms = SystemTimer::get().ms_since_boot();
 				while (true)
@@ -77,14 +82,14 @@ namespace Kernel::ACPI::AML
 							return ParseResult(Integer::Constants::Zero);
 					}
 
-					if (timeout->value >= 0xFFFF)
+					if (timeout_value >= 0xFFFF)
 						event_node->thread_blocker.block_indefinite();
 					else
 					{
 						const uint64_t current_ms = SystemTimer::get().ms_since_boot();
-						if (current_ms >= start_ms + timeout->value)
+						if (current_ms >= start_ms + timeout_value)
 							return ParseResult(Integer::Constants::Ones);
-						event_node->thread_blocker.block_with_timeout_ms(start_ms + timeout->value - current_ms);
+						event_node->thread_blocker.block_with_timeout_ms(start_ms + timeout_value - current_ms);
 					}
 				}
 

kernel/include/kernel/ACPI/AML/Expression.h

@@ -1,9 +1,10 @@
 #pragma once
 
+#include <kernel/ACPI/AML/Buffer.h>
 #include <kernel/ACPI/AML/Bytes.h>
 #include <kernel/ACPI/AML/Integer.h>
-#include <kernel/ACPI/AML/Node.h>
 #include <kernel/ACPI/AML/ParseContext.h>
+#include <kernel/ACPI/AML/String.h>
 
 namespace Kernel::ACPI::AML
 {
@@ -25,13 +26,14 @@ namespace Kernel::ACPI::AML
 					auto source_result = AML::parse_object(context);
 					if (!source_result.success())
 						return ParseResult::Failure;
-					auto source_node = source_result.node() ? source_result.node()->as_integer(): BAN::RefPtr<AML::Integer>();
-					if (!source_node)
+					auto conv_node = source_result.node() ? source_result.node()->convert(AML::Node::ConvInteger) : BAN::RefPtr<AML::Node>();
+					if (!conv_node)
 					{
-						AML_ERROR("UnaryOp source not integer");
+						AML_ERROR("UnaryOp source not integer, type {}", static_cast<uint8_t>(source_result.node()->type));
 						return ParseResult::Failure;
 					}
 
+					auto source_node = static_cast<AML::Integer*>(conv_node.ptr());
 					if (source_node->constant)
 					{
 						AML_ERROR("UnaryOp source is constant");
@@ -48,18 +50,23 @@ namespace Kernel::ACPI::AML
 				{
 					context.aml_data = context.aml_data.slice(1);
 
-					auto node_result = AML::parse_object(context);
-					if (!node_result.success())
+					auto source_result = AML::parse_object(context);
+					if (!source_result.success())
 						return ParseResult::Failure;
-
-					auto value = node_result.node() ? node_result.node()->as_integer() : BAN::RefPtr<AML::Integer>();
-					if (!value)
+					auto conv_node = source_result.node() ? source_result.node()->convert(AML::Node::ConvInteger) : BAN::RefPtr<AML::Node>();
+					if (!conv_node)
+					{
+						AML_ERROR("UnaryOp source not integer, type {}", static_cast<uint8_t>(source_result.node()->type));
+						return ParseResult::Failure;
+					}
+					auto source_node = static_cast<AML::Integer*>(conv_node.ptr());
+					if (!source_node)
 					{
 						AML_ERROR("Logical NotOp source is not integer");
 						return ParseResult::Failure;
 					}
 
-					auto result = value->value ? Integer::Constants::Zero : Integer::Constants::Ones;
+					auto result = source_node->value ? Integer::Constants::Zero : Integer::Constants::Ones;
 					return ParseResult(result);
 				}
 				case AML::Byte::AddOp:
@@ -97,21 +104,25 @@ namespace Kernel::ACPI::AML
 			auto lhs_result = AML::parse_object(context);
 			if (!lhs_result.success())
 				return ParseResult::Failure;
-			auto lhs_value = lhs_result.node() ? lhs_result.node()->as_integer() : BAN::RefPtr<AML::Integer>();
-			if (!lhs_value)
+			auto lhs_conv = lhs_result.node() ? lhs_result.node()->convert(AML::Node::ConvInteger) : BAN::RefPtr<AML::Node>();
+			if (!lhs_conv)
 			{
-				AML_ERROR("BinaryOP {2H} LHS not an integer", static_cast<uint8_t>(opcode));
+				AML_ERROR("BinaryOP {2H} LHS not an integer, type {}",
+					static_cast<uint8_t>(opcode),
+					static_cast<uint8_t>(lhs_result.node()->type)
+				);
 				if (lhs_result.node())
 					lhs_result.node()->debug_print(1);
 				AML_DEBUG_PRINTLN("");
 				return ParseResult::Failure;
 			}
+			const auto lhs_value = static_cast<AML::Integer*>(lhs_conv.ptr())->value;
 
 			auto rhs_result = AML::parse_object(context);
 			if (!rhs_result.success())
 				return ParseResult::Failure;
-			auto rhs_value = rhs_result.node() ? rhs_result.node()->as_integer() : BAN::RefPtr<AML::Integer>();
-			if (!rhs_value)
+			auto rhs_conv = rhs_result.node() ? rhs_result.node()->convert(AML::Node::ConvInteger) : BAN::RefPtr<AML::Node>();
+			if (!rhs_conv)
 			{
 				AML_ERROR("BinaryOP {2H} RHS not an integer", static_cast<uint8_t>(opcode));
 				if (rhs_result.node())
@@ -119,12 +130,14 @@ namespace Kernel::ACPI::AML
 				AML_DEBUG_PRINTLN("");
 				return ParseResult::Failure;
 			}
+			const auto rhs_value = static_cast<AML::Integer*>(rhs_conv.ptr())->value;
 
 			if (context.aml_data.size() < 1)
 			{
 				AML_ERROR("BinaryOP {2H} missing target", static_cast<uint8_t>(opcode));
 				return ParseResult::Failure;
 			}
+
 			BAN::RefPtr<AML::Node> target_node;
 			if (context.aml_data[0] == 0x00)
 				context.aml_data = context.aml_data.slice(1);
@@ -159,9 +172,7 @@ namespace Kernel::ACPI::AML
 					ASSERT_NOT_REACHED();
 			}
 
-			uint64_t result = func(lhs_value->value, rhs_value->value);
-			auto result_node = MUST(BAN::RefPtr<AML::Integer>::create(result));
-
+			auto result_node = MUST(BAN::RefPtr<AML::Integer>::create(func(lhs_value, rhs_value)));
 			if (target_node && !target_node->store(result_node))
 			{
 				AML_ERROR("BinaryOp {2H} failed to store result", static_cast<uint8_t>(opcode));
@@ -176,10 +187,26 @@ namespace Kernel::ACPI::AML
 			auto opcode = static_cast<AML::Byte>(context.aml_data[0]);
 			context.aml_data = context.aml_data.slice(1);
 
+			uint8_t mask;
+			switch (opcode)
+			{
+				case AML::Byte::LAndOp:
+				case AML::Byte::LOrOp:
+					mask = AML::Node::ConvInteger;
+					break;
+				case AML::Byte::LEqualOp:
+				case AML::Byte::LGreaterOp:
+				case AML::Byte::LLessOp:
+					mask = AML::Node::ConvInteger | AML::Node::ConvString | AML::Node::ConvBuffer;
+					break;
+				default:
+					ASSERT_NOT_REACHED();
+			}
+
 			auto lhs_result = AML::parse_object(context);
 			if (!lhs_result.success())
 				return ParseResult::Failure;
-			auto lhs_node = lhs_result.node() ? lhs_result.node()->evaluate() : BAN::RefPtr<AML::Node>();
+			auto lhs_node = lhs_result.node() ? lhs_result.node()->convert(mask) : BAN::RefPtr<AML::Node>();
 			if (!lhs_node)
 			{
 				AML_TODO("Logical BinaryOP {2H} LHS evaluated to nothing", static_cast<uint8_t>(opcode));

kernel/include/kernel/ACPI/AML/Field.h

@@ -47,7 +47,7 @@ namespace Kernel::ACPI::AML
 		uint8_t access_length = 0;
 	};
 
-	struct FieldElement : public NamedObject
+	struct FieldElement final : public AML::NamedObject
 	{
 		uint64_t bit_offset;
 		uint64_t bit_count;
@@ -63,14 +63,30 @@ namespace Kernel::ACPI::AML
 			, access_rules(access_rules)
 		{}
 
-		BAN::RefPtr<AML::Integer> as_integer() override;
+		BAN::RefPtr<AML::Node> convert(uint8_t mask) override
+		{
+			if (mask & AML::Node::ConvInteger)
+				return as_integer();
+			if (mask & AML::Node::ConvBuffer)
+			{
+				AML_TODO("Convert BankFieldElement to Buffer");
+				return {};
+			}
+			if (mask & AML::Node::ConvString)
+			{
+				AML_TODO("Convert BankFieldElement to String");
+				return {};
+			}
+			return {};
+		}
 
-		BAN::RefPtr<Node> evaluate() override { return as_integer(); }
-		bool store(BAN::RefPtr<Node> source) override;
+		BAN::RefPtr<AML::Node> store(BAN::RefPtr<Node> source) override;
 
 		void debug_print(int indent) const override;
 
 	private:
+		BAN::RefPtr<AML::Integer> as_integer();
+
 		BAN::Optional<uint64_t> evaluate_internal();
 		bool store_internal(uint64_t value);
 
@@ -83,7 +99,7 @@ namespace Kernel::ACPI::AML
 		static ParseResult parse(ParseContext& context);
 	};
 
-	struct IndexFieldElement : public NamedObject
+	struct IndexFieldElement final : public AML::NamedObject
 	{
 		uint64_t bit_offset;
 		uint64_t bit_count;
@@ -100,12 +116,30 @@ namespace Kernel::ACPI::AML
 			, access_rules(access_rules)
 		{}
 
-		BAN::RefPtr<AML::Integer> as_integer() override;
+		BAN::RefPtr<AML::Node> convert(uint8_t mask) override
+		{
+			if (mask & AML::Node::ConvInteger)
+				if (auto node = as_integer())
+					return node;
+			if (mask & AML::Node::ConvBuffer)
+			{
+				AML_TODO("convert BankFieldElement to Buffer");
+				return {};
+			}
+			if (mask & AML::Node::ConvString)
+			{
+				AML_TODO("convert BankFieldElement to String");
+				return {};
+			}
+			return {};
+		}
 
-		BAN::RefPtr<AML::Node> evaluate() override { return as_integer(); }
-		bool store(BAN::RefPtr<Node> source) override;
+		BAN::RefPtr<AML::Node> store(BAN::RefPtr<Node> source) override;
 
 		void debug_print(int indent) const override;
+
+	private:
+		BAN::RefPtr<AML::Integer> as_integer();
 	};
 
 	struct IndexField
@@ -113,7 +147,7 @@ namespace Kernel::ACPI::AML
 		static ParseResult parse(ParseContext& context);
 	};
 
-	struct BankFieldElement : public NamedObject
+	struct BankFieldElement final : public AML::NamedObject
 	{
 		uint64_t bit_offset;
 		uint64_t bit_count;
@@ -131,10 +165,30 @@ namespace Kernel::ACPI::AML
 			, access_rules(access_rules)
 		{}
 
-		BAN::RefPtr<Node> evaluate() override;
-		bool store(BAN::RefPtr<Node> source) override;
+		BAN::RefPtr<AML::Node> convert(uint8_t mask) override
+		{
+			if (mask & AML::Node::ConvInteger)
+				if (auto node = as_integer())
+					return node;
+			if (mask & AML::Node::ConvBuffer)
+			{
+				AML_TODO("convert BankFieldElement to Buffer");
+				return {};
+			}
+			if (mask & AML::Node::ConvString)
+			{
+				AML_TODO("convert BankFieldElement to String");
+				return {};
+			}
+			return {};
+		}
+
+		BAN::RefPtr<AML::Node> store(BAN::RefPtr<Node> source) override;
 
 		void debug_print(int indent) const override;
+
+	private:
+		BAN::RefPtr<AML::Integer> as_integer();
 	};
 
 	struct BankField

kernel/include/kernel/ACPI/AML/IfElse.h

@@ -26,12 +26,13 @@ namespace Kernel::ACPI::AML
 			auto predicate_result = AML::parse_object(context);
 			if (!predicate_result.success())
 				return ParseResult::Failure;
-			auto predicate = predicate_result.node() ? predicate_result.node()->as_integer() : BAN::RefPtr<AML::Integer>();
-			if (!predicate)
+			auto predicate_node = predicate_result.node() ? predicate_result.node()->convert(AML::Node::ConvInteger) : BAN::RefPtr<AML::Node>();
+			if (!predicate_node)
 			{
 				AML_ERROR("If predicate is not an integer");
 				return ParseResult::Failure;
 			}
+			const auto predicate_value = static_cast<AML::Integer*>(predicate_node.ptr())->value;
 
 			// Else
 			BAN::ConstByteSpan else_pkg;
@@ -43,14 +44,14 @@ namespace Kernel::ACPI::AML
 					return ParseResult::Failure;
 				else_pkg = else_pkg_result.value();
 			}
-			if (predicate->value == 0)
+			if (predicate_value == 0)
 				context.aml_data = else_pkg;
 
 			while (context.aml_data.size() > 0)
 			{
 				auto object_result = AML::parse_object(context);
-				if (object_result.returned())
-					return ParseResult(ParseResult::Result::Returned, object_result.node());
+				if (object_result.returned() || object_result.breaked() || object_result.continued())
+					return object_result;
 				if (!object_result.success())
 					return ParseResult::Failure;
 			}

kernel/include/kernel/ACPI/AML/Index.h

@@ -5,6 +5,7 @@
 #include <kernel/ACPI/AML/Package.h>
 #include <kernel/ACPI/AML/ParseContext.h>
 #include <kernel/ACPI/AML/Reference.h>
+#include <kernel/ACPI/AML/Register.h>
 
 namespace Kernel::ACPI::AML
 {
@@ -20,22 +21,27 @@ namespace Kernel::ACPI::AML
 			auto source_result = AML::parse_object(context);
 			if (!source_result.success())
 				return ParseResult::Failure;
-			auto source = source_result.node() ? source_result.node()->evaluate() : BAN::RefPtr<AML::Node>();
+			auto source = source_result.node() ? source_result.node()->to_underlying() : BAN::RefPtr<AML::Node>();
+			if (source && source->type != AML::Node::Type::Package)
+				source = source->convert(AML::Node::ConvBuffer | AML::Node::ConvInteger | AML::Node::ConvString);
 			if (!source)
 			{
-				AML_ERROR("IndexOp source is null");
+				AML_ERROR("IndexOp source could not be converted");
 				return ParseResult::Failure;
 			}
 
 			auto index_result = AML::parse_object(context);
 			if (!index_result.success())
 				return ParseResult::Failure;
-			auto index = index_result.node() ? index_result.node()->as_integer() : BAN::RefPtr<AML::Integer>();
-			if (!index)
+			auto index_node = index_result.node()
+				? index_result.node()->convert(AML::Node::ConvInteger)
+				: BAN::RefPtr<AML::Node>();
+			if (!index_node)
 			{
 				AML_ERROR("IndexOp index is not an integer");
 				return ParseResult::Failure;
 			}
+			const auto index = static_cast<AML::Integer*>(index_node.ptr())->value;
 
 			BAN::RefPtr<AML::Reference> result;
 			switch (source->type)
@@ -43,36 +49,36 @@ namespace Kernel::ACPI::AML
 				case AML::Node::Type::Buffer:
 				{
 					auto buffer = BAN::RefPtr<AML::Buffer>(static_cast<AML::Buffer*>(source.ptr()));
-					if (index->value >= buffer->buffer.size())
+					if (index >= buffer->buffer.size())
 					{
 						AML_ERROR("IndexOp index is out of buffer bounds");
 						return ParseResult::Failure;
 					}
-					auto buffer_field = MUST(BAN::RefPtr<BufferField>::create(NameSeg(""_sv), buffer, index->value * 8, 8));
+					auto buffer_field = MUST(BAN::RefPtr<BufferField>::create(NameSeg(""_sv), buffer, index * 8, 8));
 					result = MUST(BAN::RefPtr<AML::Reference>::create(buffer_field));
 					break;
 				}
 				case AML::Node::Type::Package:
 				{
 					auto package = static_cast<AML::Package*>(source.ptr());
-					if (index->value >= package->elements.size())
+					if (index >= package->elements.size())
 					{
 						AML_ERROR("IndexOp index is out of package bounds");
 						return ParseResult::Failure;
 					}
-					auto package_element = package->elements[index->value];
+					auto package_element = package->elements[index];
 					result = MUST(BAN::RefPtr<AML::Reference>::create(package_element));
 					break;
 				}
 				case AML::Node::Type::String:
 				{
 					auto string = BAN::RefPtr<AML::String>(static_cast<AML::String*>(source.ptr()));
-					if (index->value >= string->string.size())
+					if (index >= string->string.size())
 					{
 						AML_ERROR("IndexOp index is out of string bounds");
 						return ParseResult::Failure;
 					}
-					auto buffer_field = MUST(BAN::RefPtr<BufferField>::create(NameSeg(""_sv), string, index->value * 8, 8));
+					auto buffer_field = MUST(BAN::RefPtr<BufferField>::create(NameSeg(""_sv), string, index * 8, 8));
 					result = MUST(BAN::RefPtr<AML::Reference>::create(buffer_field));
 					break;
 				}
@@ -82,7 +88,7 @@ namespace Kernel::ACPI::AML
 			}
 
 #if AML_DEBUG_LEVEL >= 2
-			AML_DEBUG_PRINT("Index {}, ", index->value);
+			AML_DEBUG_PRINT("Index {}, ", index);
 			source->debug_print(0);
 			AML_DEBUG_PRINTLN("");
 #endif

kernel/include/kernel/ACPI/AML/Integer.h

@@ -10,7 +10,7 @@
 namespace Kernel::ACPI::AML
 {
 
-	struct Integer : public Node
+	struct Integer final : public AML::Node
 	{
 		struct Constants
 		{
@@ -23,141 +23,17 @@ namespace Kernel::ACPI::AML
 		uint64_t value;
 		const bool constant;
 
-		Integer(uint64_t value, bool constant = false)
-			: Node(Node::Type::Integer)
-			, value(value)
-			, constant(constant)
-		{}
+		Integer(uint64_t value, bool constant = false);
 
-		BAN::Optional<bool> logical_compare(BAN::RefPtr<AML::Node> node, AML::Byte binaryop)
-		{
-			auto rhs = node ? node->as_integer() : BAN::RefPtr<AML::Integer>();
-			if (!rhs)
-			{
-				AML_ERROR("Integer logical compare RHS is not integer");
-				return {};
-			}
+		BAN::Optional<bool> logical_compare(BAN::RefPtr<AML::Node> node, AML::Byte binaryop);
 
-			switch (binaryop)
-			{
-				case AML::Byte::LAndOp:		return value && rhs->value;
-				case AML::Byte::LEqualOp:	return value == rhs->value;
-				case AML::Byte::LGreaterOp:	return value > rhs->value;
-				case AML::Byte::LLessOp:	return value < rhs->value;
-				case AML::Byte::LOrOp:		return value || rhs->value;
-				default:
-					ASSERT_NOT_REACHED();
-			}
-		}
+		BAN::RefPtr<AML::Node> convert(uint8_t mask) override;
+		BAN::RefPtr<Node> copy() override;
+		BAN::RefPtr<AML::Node> store(BAN::RefPtr<AML::Node> store_node) override;
 
-		BAN::RefPtr<AML::Integer> as_integer() override { return this; }
+		static ParseResult parse(BAN::ConstByteSpan& aml_data);
 
-		BAN::RefPtr<Node> copy() override { return MUST(BAN::RefPtr<Integer>::create(value)); }
-
-		BAN::RefPtr<AML::Node> evaluate() override
-		{
-			return this;
-		}
-
-		bool store(BAN::RefPtr<AML::Node> store_node) override
-		{
-			if (constant)
-			{
-				AML_ERROR("Cannot store to constant integer");
-				return false;
-			}
-			auto store_value = store_node->as_integer();
-			if (!store_value)
-			{
-				AML_ERROR("Cannot store non-integer to integer");
-				return false;
-			}
-			value = store_value->value;
-			return true;
-		}
-
-		static ParseResult parse(BAN::ConstByteSpan& aml_data)
-		{
-			switch (static_cast<AML::Byte>(aml_data[0]))
-			{
-				case AML::Byte::ZeroOp:
-					aml_data = aml_data.slice(1);
-					return ParseResult(Constants::Zero);
-				case AML::Byte::OneOp:
-					aml_data = aml_data.slice(1);
-					return ParseResult(Constants::One);
-				case AML::Byte::OnesOp:
-					aml_data = aml_data.slice(1);
-					return ParseResult(Constants::Ones);
-				case AML::Byte::BytePrefix:
-				{
-					if (aml_data.size() < 2)
-						return ParseResult::Failure;
-					const uint8_t value = aml_data[1];
-					aml_data = aml_data.slice(2);
-					return ParseResult(MUST(BAN::RefPtr<Integer>::create(value)));
-				}
-				case AML::Byte::WordPrefix:
-				{
-					if (aml_data.size() < 3)
-						return ParseResult::Failure;
-					uint16_t value = 0;
-					value |= aml_data[1] << 0;
-					value |= aml_data[2] << 8;
-					aml_data = aml_data.slice(3);
-					return ParseResult(MUST(BAN::RefPtr<Integer>::create(value)));
-				}
-				case AML::Byte::DWordPrefix:
-				{
-					if (aml_data.size() < 5)
-						return ParseResult::Failure;
-					uint32_t value = 0;
-					value |= static_cast<uint32_t>(aml_data[1]) <<  0;
-					value |= static_cast<uint32_t>(aml_data[2]) <<  8;
-					value |= static_cast<uint32_t>(aml_data[3]) << 16;
-					value |= static_cast<uint32_t>(aml_data[4]) << 24;
-					aml_data = aml_data.slice(5);
-					return ParseResult(MUST(BAN::RefPtr<Integer>::create(value)));
-				}
-				case AML::Byte::QWordPrefix:
-				{
-					if (aml_data.size() < 9)
-						return ParseResult::Failure;
-					uint64_t value = 0;
-					value |= static_cast<uint64_t>(aml_data[1]) <<  0;
-					value |= static_cast<uint64_t>(aml_data[2]) <<  8;
-					value |= static_cast<uint64_t>(aml_data[3]) << 16;
-					value |= static_cast<uint64_t>(aml_data[4]) << 24;
-					value |= static_cast<uint64_t>(aml_data[5]) << 32;
-					value |= static_cast<uint64_t>(aml_data[6]) << 40;
-					value |= static_cast<uint64_t>(aml_data[7]) << 48;
-					value |= static_cast<uint64_t>(aml_data[8]) << 56;
-					aml_data = aml_data.slice(9);
-					return ParseResult(MUST(BAN::RefPtr<Integer>::create(value)));
-				}
-				default:
-					ASSERT_NOT_REACHED();
-			}
-		}
-
-		void debug_print(int indent) const override
-		{
-			AML_DEBUG_PRINT_INDENT(indent);
-			if (!constant)
-				AML_DEBUG_PRINT("0x{H}", value);
-			else
-			{
-				AML_DEBUG_PRINT("Const ");
-				if (value == Constants::Zero->value)
-					AML_DEBUG_PRINT("Zero");
-				else if (value == Constants::One->value)
-					AML_DEBUG_PRINT("One");
-				else if (value == Constants::Ones->value)
-					AML_DEBUG_PRINT("Ones");
-				else
-					ASSERT_NOT_REACHED();
-			}
-		}
+		void debug_print(int indent) const override;
 	};
 
 }

kernel/include/kernel/ACPI/AML/Method.h

@@ -3,14 +3,16 @@
 #include <BAN/Function.h>
 #include <kernel/ACPI/AML/Bytes.h>
 #include <kernel/ACPI/AML/Namespace.h>
+#include <kernel/ACPI/AML/Namespace.h>
 #include <kernel/ACPI/AML/ParseContext.h>
 #include <kernel/ACPI/AML/Pkg.h>
+#include <kernel/ACPI/AML/Register.h>
 #include <kernel/ACPI/AML/Scope.h>
 
 namespace Kernel::ACPI::AML
 {
 
-	struct Method : public AML::Scope
+	struct Method final : public AML::Scope
 	{
 		Kernel::Mutex mutex;
 		uint8_t arg_count;
@@ -27,6 +29,8 @@ namespace Kernel::ACPI::AML
 			, sync_level(sync_level)
 		{}
 
+		BAN::RefPtr<AML::Node> convert(uint8_t) override { return {}; }
+
 		static ParseResult parse(AML::ParseContext& context)
 		{
 			ASSERT(context.aml_data.size() >= 1);
@@ -142,8 +146,8 @@ namespace Kernel::ACPI::AML
 				}
 			}
 
-			if (return_value.has_value() && return_value.value())
-				return_value = return_value.value()->evaluate();
+			if (return_value.has_value() && return_value.value() && return_value.value()->type == AML::Node::Type::Register)
+				return_value.value() = static_cast<AML::Register*>(return_value.value().ptr())->value;
 
 			while (!context.created_objects.empty())
 			{

kernel/include/kernel/ACPI/AML/Mutex.h

@@ -10,16 +10,20 @@
 namespace Kernel::ACPI::AML
 {
 
-	struct Mutex : public AML::NamedObject
+	struct Mutex final : public AML::NamedObject
 	{
 		Kernel::Mutex mutex;
 		uint8_t sync_level;
+		bool global;
 
-		Mutex(NameSeg name, uint8_t sync_level)
+		Mutex(NameSeg name, uint8_t sync_level, bool global = false)
 			: NamedObject(Node::Type::Mutex, name)
 			, sync_level(sync_level)
+			, global(global)
 		{}
 
+		BAN::RefPtr<AML::Node> convert(uint8_t) override { return {}; }
+
 		static ParseResult parse(ParseContext& context)
 		{
 			ASSERT(context.aml_data.size() >= 2);
@@ -71,7 +75,7 @@ namespace Kernel::ACPI::AML
 
 			auto mutex = MUST(BAN::RefPtr<Mutex>::create(name->path.back(), sync_level));
 			if (!Namespace::root_namespace()->add_named_object(context, name.value(), mutex))
-				return ParseResult::Failure;
+				return ParseResult::Success;
 
 #if AML_DEBUG_LEVEL >= 2
 			mutex->debug_print(0);

kernel/include/kernel/ACPI/AML/NamedObject.h

@@ -6,7 +6,7 @@
 namespace Kernel::ACPI::AML
 {
 
-	struct NamedObject : public Node
+	struct NamedObject : public AML::Node
 	{
 		BAN::RefPtr<NamedObject> parent;
 		NameSeg name;
@@ -14,7 +14,7 @@ namespace Kernel::ACPI::AML
 		NamedObject(Node::Type type, NameSeg name) : Node(type), name(name) {}
 	};
 
-	struct Name : public NamedObject
+	struct Name final : public AML::NamedObject
 	{
 		BAN::RefPtr<AML::Node> object;
 
@@ -22,21 +22,19 @@ namespace Kernel::ACPI::AML
 			: NamedObject(Node::Type::Name, name), object(BAN::move(object))
 		{}
 
-		BAN::RefPtr<AML::Buffer> as_buffer() override;
-		BAN::RefPtr<AML::Integer> as_integer() override;
-		BAN::RefPtr<AML::String> as_string() override;
+		BAN::RefPtr<AML::Node> to_underlying() override { return object; }
 
-		BAN::RefPtr<AML::Node> evaluate() override
+		BAN::RefPtr<AML::Node> convert(uint8_t mask) override
 		{
 			ASSERT(object);
-			return object->evaluate();
+			return object->convert(mask);
 		}
 
-		bool store(BAN::RefPtr<AML::Node> node) override
+		BAN::RefPtr<AML::Node> store(BAN::RefPtr<AML::Node> node) override
 		{
 			ASSERT(object);
-			object = node;
-			return true;
+			ASSERT(object->type != AML::Node::Type::Reference);
+			return object->store(node);
 		}
 
 		static ParseResult parse(ParseContext& context);

kernel/include/kernel/ACPI/AML/Namespace.h

@@ -8,8 +8,9 @@
 namespace Kernel::ACPI::AML
 {
 
-	struct Namespace : public AML::Scope
+	struct Namespace final : public AML::Scope
 	{
+		static BAN::RefPtr<AML::Namespace> create_root_namespace();
 		static BAN::RefPtr<AML::Namespace> root_namespace();
 		static BAN::RefPtr<AML::Node> debug_node;
 
@@ -35,7 +36,8 @@ namespace Kernel::ACPI::AML
 
 		Namespace(NameSeg name) : AML::Scope(Node::Type::Namespace, name) {}
 
-		static BAN::RefPtr<AML::Namespace> create_root_namespace();
+		BAN::RefPtr<AML::Node> convert(uint8_t) override { return {}; }
+
 		bool parse(const SDTHeader& header);
 
 		void debug_print(int indent) const override;

kernel/include/kernel/ACPI/AML/Node.h

@@ -17,8 +17,18 @@ namespace Kernel::ACPI::AML
 	{
 		static uint64_t total_node_count;
 
-		enum class Type
+		enum Conversion : uint8_t
 		{
+			ConvBuffer      = 1 << 0,
+			ConvBufferField = 1 << 1,
+			ConvFieldUnit   = 1 << 2,
+			ConvInteger     = 1 << 3,
+			ConvString      = 1 << 4,
+		};
+
+		enum class Type : uint8_t
+		{
+			None,
 			Alias,
 			BankFieldElement,
 			Buffer,
@@ -50,14 +60,10 @@ namespace Kernel::ACPI::AML
 
 		virtual bool is_scope() const { return false; }
 
-		virtual BAN::RefPtr<Node> copy() { return this; }
-
-		[[nodiscard]] virtual BAN::RefPtr<AML::Buffer> as_buffer();
-		[[nodiscard]] virtual BAN::RefPtr<AML::Integer> as_integer();
-		[[nodiscard]] virtual BAN::RefPtr<AML::String> as_string();
-
-		[[nodiscard]] virtual BAN::RefPtr<AML::Node> evaluate() { AML_TODO("evaluate, type {}", static_cast<uint8_t>(type)); return nullptr; }
-		[[nodiscard]] virtual bool store(BAN::RefPtr<AML::Node>) { AML_TODO("store, type {}", static_cast<uint8_t>(type)); return false; }
+		[[nodiscard]] virtual BAN::RefPtr<AML::Node> to_underlying() { return this; }
+		[[nodiscard]] virtual BAN::RefPtr<AML::Node> convert(uint8_t mask) = 0;
+		[[nodiscard]] virtual BAN::RefPtr<Node> copy() { return this; }
+		[[nodiscard]] virtual BAN::RefPtr<AML::Node> store(BAN::RefPtr<AML::Node>) { AML_TODO("store, type {}", static_cast<uint8_t>(type)); return {}; }
 
 		virtual void debug_print(int indent) const = 0;
 	};
@@ -73,6 +79,8 @@ namespace Kernel::ACPI::AML
 			Success,
 			Failure,
 			Returned,
+			Breaked,
+			Continued,
 		};
 
 		ParseResult(Result success)
@@ -91,6 +99,8 @@ namespace Kernel::ACPI::AML
 
 		bool success() const { return m_result == Result::Success; }
 		bool returned() const { return m_result == Result::Returned; }
+		bool breaked() const { return m_result == Result::Breaked; }
+		bool continued() const { return m_result == Result::Continued; }
 
 		BAN::RefPtr<Node> node()
 		{

kernel/include/kernel/ACPI/AML/Notify.h

@@ -29,12 +29,13 @@ namespace Kernel::ACPI::AML
 			auto value_result = AML::parse_object(context);
 			if (!value_result.success())
 				return ParseResult::Failure;
-			auto value = value_result.node() ? value_result.node()->as_integer() : BAN::RefPtr<AML::Integer>();
-			if (!value)
+			auto value_node = value_result.node() ? value_result.node()->convert(AML::Node::ConvInteger) : BAN::RefPtr<AML::Node>();
+			if (!value_node)
 			{
 				AML_ERROR("Notify value is not an integer");
 				return ParseResult::Failure;
 			}
+			const auto value = static_cast<AML::Integer*>(value_node.ptr())->value;
 
 			BAN::StringView object_type_sv;
 			BAN::StringView object_name_sv;
@@ -58,7 +59,7 @@ namespace Kernel::ACPI::AML
 					break;
 			}
 
-			AML_TODO("Notify: {} {}: {2H}", object_type_sv, object_name_sv, value->value);
+			AML_TODO("Notify: {} {}: {2H}", object_type_sv, object_name_sv, value);
 			return ParseResult::Success;
 		}
 	};

kernel/include/kernel/ACPI/AML/Package.h

@@ -5,13 +5,14 @@
 #include <kernel/ACPI/AML/Node.h>
 #include <kernel/ACPI/AML/ParseContext.h>
 #include <kernel/ACPI/AML/Pkg.h>
+#include <kernel/ACPI/AML/Reference.h>
 
 namespace Kernel::ACPI::AML
 {
 
 	struct PackageElement;
 
-	struct Package : public AML::Node
+	struct Package final : public AML::Node
 	{
 		BAN::Vector<BAN::RefPtr<PackageElement>> elements;
 		AML::NameString scope;
@@ -22,16 +23,13 @@ namespace Kernel::ACPI::AML
 			, scope(scope)
 		{}
 
-		BAN::RefPtr<AML::Node> evaluate() override
-		{
-			return this;
-		}
+		BAN::RefPtr<AML::Node> convert(uint8_t) override { return {}; }
 
 		static ParseResult parse(AML::ParseContext& context);
 		virtual void debug_print(int indent) const override;
 	};
 
-	struct PackageElement : public AML::Node
+	struct PackageElement final : public AML::Node
 	{
 		BAN::RefPtr<AML::Package> parent;
 		BAN::RefPtr<AML::Node> element;
@@ -82,7 +80,7 @@ namespace Kernel::ACPI::AML
 			return true;
 		}
 
-		bool store(BAN::RefPtr<AML::Node> node) override
+		BAN::RefPtr<AML::Node> convert(uint8_t mask) override
 		{
 			if (!initialized)
 			{
@@ -91,34 +89,24 @@ namespace Kernel::ACPI::AML
 			}
 			if (!resolved && !resolve())
 				return {};
-			if (element->type == AML::Node::Type::Reference)
-				return element->store(node);
-			element = node->copy();
-			return true;
+			return element->convert(mask);
 		}
 
-		BAN::RefPtr<AML::Integer> as_integer() override
+		BAN::RefPtr<AML::Node> store(BAN::RefPtr<AML::Node> node) override
 		{
 			if (!initialized)
 			{
-				AML_ERROR("Trying to evaluate uninitialized PackageElement");
+				AML_ERROR("Trying to store into uninitialized PackageElement");
 				return {};
 			}
 			if (!resolved && !resolve())
 				return {};
-			return element->as_integer();
-		}
-
-		BAN::RefPtr<AML::Node> evaluate() override
-		{
-			if (!initialized)
-			{
-				AML_ERROR("Trying to evaluate uninitialized PackageElement");
-				return {};
-			}
-			if (!resolved && !resolve())
-				return {};
-			return element->evaluate();
+			ASSERT(element->type != AML::Node::Type::Reference);
+			if (node->type == AML::Node::Type::Reference)
+				element = static_cast<AML::Reference*>(element.ptr())->node;
+			else
+				element = element->copy();
+			return element;
 		}
 
 		static ParseResult parse(AML::ParseContext& context, BAN::RefPtr<AML::Package> package)

kernel/include/kernel/ACPI/AML/PowerResource.h

@@ -9,7 +9,7 @@
 namespace Kernel::ACPI::AML
 {
 
-	struct PowerResource : public AML::Scope
+	struct PowerResource final : public AML::Scope
 	{
 		uint8_t system_level;
 		uint16_t resource_order;
@@ -20,6 +20,8 @@ namespace Kernel::ACPI::AML
 			, resource_order(resource_order)
 		{}
 
+		BAN::RefPtr<AML::Node> convert(uint8_t) override { return {}; }
+
 		static ParseResult parse(ParseContext& context)
 		{
 			ASSERT(context.aml_data.size() >= 2);

kernel/include/kernel/ACPI/AML/Processor.h

@@ -9,7 +9,7 @@
 namespace Kernel::ACPI::AML
 {
 
-	struct Processor : public AML::Scope
+	struct Processor final : public AML::Scope
 	{
 		uint8_t id;
 		uint32_t pblk_addr;
@@ -22,6 +22,8 @@ namespace Kernel::ACPI::AML
 			, pblk_len(pblk_len)
 		{}
 
+		BAN::RefPtr<AML::Node> convert(uint8_t) override { return {}; }
+
 		static ParseResult parse(ParseContext& context)
 		{
 			ASSERT(context.aml_data.size() >= 2);
@@ -55,7 +57,7 @@ namespace Kernel::ACPI::AML
 
 			auto processor = MUST(BAN::RefPtr<Processor>::create(name->path.back(), id, pblk_addr, pblk_len));
 			if (!Namespace::root_namespace()->add_named_object(context, name.value(), processor))
-				return ParseResult::Failure;
+				return ParseResult::Success;
 
 #if AML_DEBUG_LEVEL >= 2
 			processor->debug_print(0);

kernel/include/kernel/ACPI/AML/Reference.h

@@ -10,7 +10,7 @@
 namespace Kernel::ACPI::AML
 {
 
-	struct Reference : public AML::Node
+	struct Reference final : public AML::Node
 	{
 		BAN::RefPtr<AML::Node> node;
 
@@ -21,25 +21,15 @@ namespace Kernel::ACPI::AML
 			ASSERT(node);
 		}
 
-		BAN::RefPtr<AML::Integer> as_integer() override
+		BAN::RefPtr<AML::Node> convert(uint8_t mask) override
 		{
-			if (node)
-				return node->as_integer();
-			return {};
+			ASSERT(node);
+			return node->convert(mask);
 		}
 
-		BAN::RefPtr<AML::Node> evaluate() override
+		BAN::RefPtr<AML::Node> store(BAN::RefPtr<AML::Node> value) override
 		{
-			return this;
-		}
-
-		bool store(BAN::RefPtr<AML::Node> value) override
-		{
-			if (!node)
-			{
-				AML_ERROR("Storing to null reference");
-				return false;
-			}
+			ASSERT(node);
 			return node->store(value);
 		}
 
@@ -81,6 +71,11 @@ namespace Kernel::ACPI::AML
 				object = parse_result.node();
 			}
 
+			if (object && object->type == AML::Node::Type::Reference)
+				object = static_cast<AML::Reference*>(object.ptr())->node;
+			if (object && object->type == AML::Node::Type::Register)
+				object = static_cast<AML::Register*>(object.ptr())->value;
+
 			if (!conditional)
 			{
 				if (!object)
@@ -96,18 +91,26 @@ namespace Kernel::ACPI::AML
 				return ParseResult(reference);
 			}
 
-			if (context.aml_data.size() >= 1 && context.aml_data[0] != 0x00)
+			if (context.aml_data.size() < 1)
+			{
+				AML_ERROR("CondRefOf missing target");
+				return ParseResult::Failure;
+			}
+
+			BAN::RefPtr<AML::Node> target_node;
+			if (context.aml_data[0] == 0x00)
+				context.aml_data = context.aml_data.slice(1);
+			else
 			{
 				auto target_result = AML::parse_object(context);
 				if (!target_result.success())
 					return ParseResult::Failure;
-				auto target_node = target_result.node();
+				target_node = target_result.node();
 				if (!target_node)
 				{
 					AML_ERROR("CondRefOf failed to resolve target");
 					return ParseResult::Failure;
 				}
-				target_node->store(MUST(BAN::RefPtr<Reference>::create(object)));
 			}
 
 #if AML_DEBUG_LEVEL >= 2
@@ -119,8 +122,16 @@ namespace Kernel::ACPI::AML
 			AML_DEBUG_PRINTLN("");
 #endif
 
-			auto return_value = object ? Integer::Constants::Ones : Integer::Constants::Zero;
-			return AML::ParseResult(return_value);
+			if (!object)
+				return AML::ParseResult(Integer::Constants::Zero);
+
+			if (target_node && !target_node->store(object))
+			{
+				AML_ERROR("CondRefOf failed to store into target");
+				return ParseResult::Failure;
+			}
+
+			return AML::ParseResult(Integer::Constants::Ones);
 		}
 
 		static ParseResult parse_dereference(ParseContext& context)
@@ -144,18 +155,20 @@ namespace Kernel::ACPI::AML
 				auto parse_result = AML::parse_object(context);
 				if (!parse_result.success())
 					return ParseResult::Failure;
-				auto object = parse_result.node() ? parse_result.node()->evaluate() : BAN::RefPtr<AML::Node>();
-				if (!object || object->type != AML::Node::Type::Reference)
+				auto node = parse_result.node();
+				if (node && node->type == AML::Node::Type::Register)
+					node = static_cast<AML::Register*>(node.ptr())->value;
+				if (!node || node->type != AML::Node::Type::Reference)
 				{
-					AML_TODO("DerefOf source is not a Reference, but a {}", object ? static_cast<uint8_t>(object->type) : 999);
+					AML_TODO("DerefOf source is not a Reference, but a {}", node ? static_cast<uint8_t>(node->type) : 999);
 					return ParseResult::Failure;
 				}
 #if AML_DEBUG_LEVEL >= 2
 				AML_DEBUG_PRINT("DerefOf ");
-				object->debug_print(0);
+				node->debug_print(0);
 				AML_DEBUG_PRINTLN("");
 #endif
-				return ParseResult(static_cast<Reference*>(object.ptr())->node);
+				return ParseResult(static_cast<Reference*>(node.ptr())->node);
 			}
 		}
 
@@ -164,6 +177,7 @@ namespace Kernel::ACPI::AML
 			AML_DEBUG_PRINT_INDENT(indent);
 			AML_DEBUG_PRINTLN("Reference {");
 			node->debug_print(indent + 1);
+			AML_DEBUG_PRINTLN("");
 			AML_DEBUG_PRINT_INDENT(indent);
 			AML_DEBUG_PRINT("}");
 		}

kernel/include/kernel/ACPI/AML/Region.h

@@ -8,7 +8,7 @@
 namespace Kernel::ACPI::AML
 {
 
-	struct OpRegion : public NamedObject
+	struct OpRegion final : public AML::NamedObject
 	{
 		using RegionSpace = GAS::AddressSpaceID;
 		RegionSpace region_space;
@@ -24,6 +24,8 @@ namespace Kernel::ACPI::AML
 			, region_length(region_length)
 		{}
 
+		BAN::RefPtr<AML::Node> convert(uint8_t) override { return {}; }
+
 		static ParseResult parse(AML::ParseContext& context)
 		{
 			ASSERT(context.aml_data.size() > 2);
@@ -43,8 +45,10 @@ namespace Kernel::ACPI::AML
 			auto offset_result = AML::parse_object(context);
 			if (!offset_result.success())
 				return ParseResult::Failure;
-			auto offset = offset_result.node()->as_integer();
-			if (!offset)
+			auto offset_node = offset_result.node()
+				? offset_result.node()->convert(AML::Node::ConvInteger)
+				: BAN::RefPtr<AML::Node>();
+			if (!offset_node)
 			{
 				AML_ERROR("OpRegion offset must be an integer");
 				return ParseResult::Failure;
@@ -53,22 +57,27 @@ namespace Kernel::ACPI::AML
 			auto length_result = AML::parse_object(context);
 			if (!length_result.success())
 				return ParseResult::Failure;
-			auto length = length_result.node()->as_integer();
-			if (!length)
+			auto length_node = length_result.node()
+				? length_result.node()->convert(AML::Node::ConvInteger)
+				: BAN::RefPtr<AML::Node>();
+			if (!length_node)
 			{
 				AML_ERROR("OpRegion length must be an integer");
 				return ParseResult::Failure;
 			}
 
+			const auto offset = static_cast<AML::Integer*>(offset_node.ptr())->value;
+			const auto length = static_cast<AML::Integer*>(length_node.ptr())->value;
+
 			auto op_region = MUST(BAN::RefPtr<OpRegion>::create(
 				name->path.back(),
 				region_space,
-				offset->value,
-				length->value
+				offset,
+				length
 			));
 
 			if (!Namespace::root_namespace()->add_named_object(context, name.value(), op_region))
-				return ParseResult::Failure;
+				return ParseResult::Success;
 
 #if AML_DEBUG_LEVEL >= 2
 			op_region->debug_print(0);

kernel/include/kernel/ACPI/AML/Register.h

@@ -5,58 +5,19 @@
 namespace Kernel::ACPI::AML
 {
 
-	struct Register : public AML::Node
+	struct Register final : public AML::Node
 	{
 		BAN::RefPtr<AML::Node> value;
 
-		Register()
-			: Node(Node::Type::Register)
-		{}
-		Register(BAN::RefPtr<AML::Node> value)
-			: Node(Node::Type::Register)
-			, value(value)
-		{}
+		Register();
+		Register(BAN::RefPtr<AML::Node> node);
 
-		BAN::RefPtr<AML::Buffer> as_buffer() override;
-		BAN::RefPtr<AML::Integer> as_integer() override;
-		BAN::RefPtr<AML::String> as_string() override;
+		BAN::RefPtr<AML::Node> to_underlying() override { return value; }
 
-		BAN::RefPtr<AML::Node> evaluate() override
-		{
-			if (value)
-				return value->evaluate();
-			return {};
-		}
+		BAN::RefPtr<AML::Node> convert(uint8_t mask) override;
+		BAN::RefPtr<AML::Node> store(BAN::RefPtr<AML::Node> source) override;
 
-		bool store(BAN::RefPtr<AML::Node> source) override
-		{
-			if (value && value->type == AML::Node::Type::Reference)
-				return value->store(source);
-
-			auto evaluated = source->evaluate();
-			if (!evaluated)
-			{
-				AML_ERROR("Failed to evaluate source for store");
-				return false;
-			}
-			value = evaluated->copy();
-			return true;
-		}
-
-		void debug_print(int indent) const override
-		{
-			AML_DEBUG_PRINT_INDENT(indent);
-			if (!value)
-				AML_DEBUG_PRINT("Register { No value }");
-			else
-			{
-				AML_DEBUG_PRINTLN("Register { ");
-				value->debug_print(indent + 1);
-				AML_DEBUG_PRINTLN("");
-				AML_DEBUG_PRINT_INDENT(indent);
-				AML_DEBUG_PRINT(" }");
-			}
-		}
+		void debug_print(int indent) const override;
 	};
 
 }

kernel/include/kernel/ACPI/AML/SizeOf.h

@@ -21,30 +21,36 @@ namespace Kernel::ACPI::AML
 			auto object_result = AML::parse_object(context);
 			if (!object_result.success())
 				return ParseResult::Failure;
-			auto object = object_result.node()->evaluate();
-			if (object && object->type == AML::Node::Type::Reference)
-				object = static_cast<AML::Reference*>(object.ptr())->node->evaluate();
-			if (!object)
+			auto object_node = object_result.node();
+			if (object_node && object_node->type == AML::Node::Type::Register)
+				object_node = static_cast<AML::Register*>(object_node.ptr())->value;
+			if (!object_node)
 			{
 				AML_ERROR("SizeOf object is null");
 				return ParseResult::Failure;
 			}
+			if (object_node->type != AML::Node::Type::Package)
+				object_node = object_node->convert(AML::Node::ConvBuffer | AML::Node::ConvString);
+			if (!object_node)
+			{
+				AML_ERROR("SizeOf object is not Buffer, String or Package");
+				return ParseResult::Failure;
+			}
 
 			uint64_t size = 0;
-			switch (object->type)
+			switch (object_node->type)
 			{
 				case AML::Node::Type::Buffer:
-					size = static_cast<AML::Buffer*>(object.ptr())->buffer.size();
+					size = static_cast<AML::Buffer*>(object_node.ptr())->buffer.size();
 					break;
 				case AML::Node::Type::String:
-					size = static_cast<AML::String*>(object.ptr())->string.size();
+					size = static_cast<AML::String*>(object_node.ptr())->string.size();
 					break;
 				case AML::Node::Type::Package:
-					size = static_cast<AML::Package*>(object.ptr())->elements.size();
+					size = static_cast<AML::Package*>(object_node.ptr())->elements.size();
 					break;
 				default:
-					AML_ERROR("SizeOf object is not a buffer, string or package ({})", static_cast<uint8_t>(object->type));
-					return ParseResult::Failure;
+					ASSERT_NOT_REACHED();
 			}
 
 			return ParseResult(MUST(BAN::RefPtr<Integer>::create(size)));

kernel/include/kernel/ACPI/AML/Sleep.h

@@ -19,18 +19,22 @@ namespace Kernel::ACPI::AML
 			auto sleep_time_result = AML::parse_object(context);
 			if (!sleep_time_result.success())
 				return ParseResult::Failure;
-			auto sleep_time = sleep_time_result.node() ? sleep_time_result.node()->as_integer() : BAN::RefPtr<AML::Integer>();
-			if (!sleep_time)
+			auto sleep_time_node = sleep_time_result.node()
+				? sleep_time_result.node()->convert(AML::Node::ConvInteger)
+				: BAN::RefPtr<AML::Node>();
+			if (!sleep_time_node)
 			{
 				AML_ERROR("Sleep time cannot be evaluated to an integer");
 				return ParseResult::Failure;
 			}
 
+			const auto sleep_time_value = static_cast<AML::Integer*>(sleep_time_node.ptr())->value;
+
 #if AML_DEBUG_LEVEL >= 2
-			AML_DEBUG_PRINTLN("Sleeping for {} ms", sleep_time->value);
+			AML_DEBUG_PRINTLN("Sleeping for {} ms", sleep_time_value);
 #endif
 
-			SystemTimer::get().sleep_ms(sleep_time->value);
+			SystemTimer::get().sleep_ms(sleep_time_value);
 			return ParseResult::Success;
 		}
 	};

kernel/include/kernel/ACPI/AML/Store.h

@@ -17,10 +17,10 @@ namespace Kernel::ACPI::AML
 			auto source_result = AML::parse_object(context);
 			if (!source_result.success())
 				return ParseResult::Failure;
-			auto source = source_result.node() ? source_result.node()->evaluate() : BAN::RefPtr<AML::Node>();
+			auto source = source_result.node();
 			if (!source)
 			{
-				AML_ERROR("Store source cannot be evaluated");
+				AML_ERROR("Store source is null");
 				return ParseResult::Failure;
 			}
 
@@ -44,9 +44,9 @@ namespace Kernel::ACPI::AML
 			AML_DEBUG_PRINTLN("}");
 #endif
 
-			if (!destination->store(source))
-				return ParseResult::Failure;
-			return ParseResult(destination);
+			if (auto stored = destination->store(source))
+				return ParseResult(stored);
+			return ParseResult::Failure;
 		}
 	};
 

kernel/include/kernel/ACPI/AML/String.h

@@ -7,7 +7,7 @@
 namespace Kernel::ACPI::AML
 {
 
-	struct String : public AML::Node
+	struct String final : public AML::Node
 	{
 		BAN::Vector<uint8_t> string;
 
@@ -22,11 +22,31 @@ namespace Kernel::ACPI::AML
 
 		BAN::Optional<bool> logical_compare(BAN::RefPtr<AML::Node> node, AML::Byte binaryop);
 
-		BAN::RefPtr<AML::Buffer> as_buffer() override;
+		BAN::RefPtr<AML::Node> convert(uint8_t mask) override;
 
-		BAN::RefPtr<AML::Node> evaluate() override
+		BAN::RefPtr<AML::Node> copy() override
 		{
-			return this;
+			auto new_string = MUST(BAN::RefPtr<AML::String>::create());
+			MUST(new_string->string.resize(this->string.size()));
+			for (size_t i = 0; i < this->string.size(); i++)
+				new_string->string[i] = this->string[i];
+			return new_string;
+		}
+
+		BAN::RefPtr<AML::Node> store(BAN::RefPtr<AML::Node> node) override
+		{
+			ASSERT(node);
+			auto conv_node = node->convert(AML::Node::ConvString);
+			if (!conv_node)
+			{
+				AML_ERROR("Could not convert to String");
+				return {};
+			}
+			auto* string_node = static_cast<AML::String*>(conv_node.ptr());
+			MUST(string.resize(string_node->string.size()));
+			for (size_t i = 0; i < string.size(); i++)
+				string[i] = string_node->string[i];
+			return string_node->copy();
 		}
 
 		BAN::StringView string_view() const
@@ -41,6 +61,9 @@ namespace Kernel::ACPI::AML
 			AML_DEBUG_PRINT_INDENT(indent);
 			AML_DEBUG_PRINT("String \"{}\"", string_view());
 		}
+
+	private:
+		BAN::RefPtr<AML::Buffer> as_buffer();
 	};
 
 }

kernel/include/kernel/ACPI/AML/ThermalZone.h

@@ -9,12 +9,14 @@
 namespace Kernel::ACPI::AML
 {
 
-	struct ThermalZone : public AML::Scope
+	struct ThermalZone final : public AML::Scope
 	{
 		ThermalZone(NameSeg name)
 			: Scope(Node::Type::ThermalZone, name)
 		{}
 
+		BAN::RefPtr<AML::Node> convert(uint8_t) override { return {}; }
+
 		static ParseResult parse(ParseContext& context)
 		{
 			ASSERT(context.aml_data.size() >= 2);
@@ -33,7 +35,7 @@ namespace Kernel::ACPI::AML
 
 			auto thermal_zone = MUST(BAN::RefPtr<ThermalZone>::create(name->path.back()));
 			if (!Namespace::root_namespace()->add_named_object(context, name.value(), thermal_zone))
-				return ParseResult::Failure;
+				return ParseResult::Success;
 
 #if AML_DEBUG_LEVEL >= 2
 			thermal_zone->debug_print(0);

kernel/include/kernel/ACPI/AML/While.h

@@ -12,9 +12,22 @@ namespace Kernel::ACPI::AML
 		static ParseResult parse(ParseContext& context)
 		{
 			ASSERT(context.aml_data.size() >= 1);
-			ASSERT(static_cast<Byte>(context.aml_data[0]) == Byte::WhileOp);
+
+			AML::Byte opcode = static_cast<Byte>(context.aml_data[0]);
 			context.aml_data = context.aml_data.slice(1);
 
+			switch (opcode)
+			{
+				case AML::Byte::BreakOp:
+					return ParseResult(ParseResult::Result::Breaked);
+				case AML::Byte::ContinueOp:
+					return ParseResult(ParseResult::Result::Continued);
+				case AML::Byte::WhileOp:
+					break;
+				default:
+					ASSERT_NOT_REACHED();
+			}
+
 			auto while_pkg = AML::parse_pkg(context.aml_data);
 			if (!while_pkg.has_value())
 				return ParseResult::Failure;
@@ -29,28 +42,27 @@ namespace Kernel::ACPI::AML
 				auto predicate_result = AML::parse_object(context);
 				if (!predicate_result.success())
 					return ParseResult::Failure;
-				auto predicate = predicate_result.node() ? predicate_result.node()->as_integer() : BAN::RefPtr<AML::Integer>();
-				if (!predicate)
+				auto predicate_node = predicate_result.node()
+					? predicate_result.node()->convert(AML::Node::ConvInteger)
+					: BAN::RefPtr<AML::Node>();
+				if (!predicate_node)
 				{
 					AML_ERROR("While predicate is not an integer");
 					return ParseResult::Failure;
 				}
 
-				if (!predicate->value)
+				if (!static_cast<AML::Integer*>(predicate_node.ptr())->value)
 					break;
 
 				while (context.aml_data.size() > 0)
 				{
-					// NOTE: we can just parse BreakOp here, since this is the only legal place for BreakOp
-					if (static_cast<AML::Byte>(context.aml_data[0]) == AML::Byte::BreakOp)
-					{
-						context.aml_data = context.aml_data.slice(1);
-						breaked = true;
-						break;
-					}
 					auto object_result = AML::parse_object(context);
 					if (object_result.returned())
 						return ParseResult(ParseResult::Result::Returned, object_result.node());
+					if (object_result.breaked())
+						breaked = true;
+					if (object_result.breaked() || object_result.continued())
+						break;
 					if (!object_result.success())
 						return ParseResult::Failure;
 				}

kernel/kernel/ACPI/ACPI.cpp

@@ -2,6 +2,7 @@
 #include <BAN/StringView.h>
 #include <kernel/ACPI/ACPI.h>
 #include <kernel/ACPI/AML.h>
+#include <kernel/ACPI/AML/Alias.h>
 #include <kernel/ACPI/AML/Device.h>
 #include <kernel/ACPI/AML/Field.h>
 #include <kernel/ACPI/AML/Integer.h>
@@ -144,10 +145,10 @@ acpi_release_global_lock:
 		auto field_element = MUST(BAN::RefPtr<AML::FieldElement>::create(""_sv, register_bit_offset, register_bit_width, field_rules));
 		field_element->op_region = op_region;
 
-		auto result = field_element->as_integer();
+		auto result = field_element->convert(AML::Node::ConvInteger);
 		if (!result)
 			return {};
-		return result->value;
+		return static_cast<AML::Integer*>(result.ptr())->value;
 	}
 
 	bool GAS::write(uint64_t value)
@@ -168,7 +169,7 @@ acpi_release_global_lock:
 		auto field_element = MUST(BAN::RefPtr<AML::FieldElement>::create(""_sv, register_bit_offset, register_bit_width, field_rules));
 		field_element->op_region = op_region;
 
-		return field_element->store(MUST(BAN::RefPtr<AML::Integer>::create(value)));
+		return !!field_element->store(MUST(BAN::RefPtr<AML::Integer>::create(value)));
 	}
 
 	enum PM1Event : uint16_t
@@ -494,7 +495,25 @@ acpi_release_global_lock:
 			dwarnln("\\_S5 not found");
 			return;
 		}
-		auto s5_evaluated = s5_object->evaluate();
+		BAN::RefPtr<AML::Node> s5_evaluated = s5_object;
+		while (true)
+		{
+			bool done = false;
+			switch (s5_evaluated->type)
+			{
+				case AML::Node::Type::Alias:
+					s5_evaluated = static_cast<AML::Alias*>(s5_evaluated.ptr())->target;
+					break;
+				case AML::Node::Type::Name:
+					s5_evaluated = static_cast<AML::Name*>(s5_evaluated.ptr())->object;
+					break;
+				default:
+					done = true;
+					break;
+			}
+			if (done)
+				break;
+		}
 		if (!s5_evaluated)
 		{
 			dwarnln("Failed to evaluate \\_S5");
@@ -512,9 +531,9 @@ acpi_release_global_lock:
 			return;
 		}
 
-		auto slp_typa = s5_package->elements[0]->as_integer();
-		auto slp_typb = s5_package->elements[1]->as_integer();
-		if (!slp_typa || !slp_typb)
+		auto slp_typa_node = s5_package->elements[0]->convert(AML::Node::ConvInteger);
+		auto slp_typb_node = s5_package->elements[1]->convert(AML::Node::ConvInteger);
+		if (!slp_typa_node || !slp_typb_node)
 		{
 			dwarnln("Failed to get SLP_TYPx values");
 			return;
@@ -525,9 +544,12 @@ acpi_release_global_lock:
 
 		dprintln("Entering sleep state S5");
 
+		const auto slp_typa_value = static_cast<AML::Integer*>(slp_typa_node.ptr())->value;
+		const auto slp_typb_value = static_cast<AML::Integer*>(slp_typb_node.ptr())->value;
+
 		uint16_t pm1a_data = IO::inw(fadt().pm1a_cnt_blk);
 		pm1a_data &= ~(PM1_CNT_SLP_TYP_MASK << PM1_CNT_SLP_TYP_SHIFT);
-		pm1a_data |= (slp_typa->value & PM1_CNT_SLP_TYP_MASK) << PM1_CNT_SLP_TYP_SHIFT;
+		pm1a_data |= (slp_typa_value & PM1_CNT_SLP_TYP_MASK) << PM1_CNT_SLP_TYP_SHIFT;
 		pm1a_data |= PM1_CNT_SLP_EN;
 		IO::outw(fadt().pm1a_cnt_blk, pm1a_data);
 
@@ -535,7 +557,7 @@ acpi_release_global_lock:
 		{
 			uint16_t pm1b_data = IO::inw(fadt().pm1b_cnt_blk);
 			pm1b_data &= ~(PM1_CNT_SLP_TYP_MASK << PM1_CNT_SLP_TYP_SHIFT);
-			pm1b_data |= (slp_typb->value & PM1_CNT_SLP_TYP_MASK) << PM1_CNT_SLP_TYP_SHIFT;
+			pm1b_data |= (slp_typb_value & PM1_CNT_SLP_TYP_MASK) << PM1_CNT_SLP_TYP_SHIFT;
 			pm1b_data |= PM1_CNT_SLP_EN;
 			IO::outw(fadt().pm1b_cnt_blk, pm1b_data);
 		}

kernel/kernel/ACPI/AML/Field.cpp

@@ -492,13 +492,14 @@ namespace Kernel::ACPI
 		return MUST(BAN::RefPtr<Integer>::create(result.value()));
 	}
 
-	bool AML::FieldElement::store(BAN::RefPtr<AML::Node> source)
+	BAN::RefPtr<AML::Node> AML::FieldElement::store(BAN::RefPtr<AML::Node> source)
 	{
-		auto source_integer = source->as_integer();
+		ASSERT(source);
+		auto source_integer = source->convert(AML::Node::ConvInteger);
 		if (!source_integer)
 		{
 			AML_TODO("FieldElement store with non-integer source, type {}", static_cast<uint8_t>(source->type));
-			return false;
+			return {};
 		}
 
 		op_region->mutex.lock();
@@ -510,7 +511,9 @@ namespace Kernel::ACPI
 				ACPI::release_global_lock();
 		});
 
-		return store_internal(source_integer->value);
+		if (!store_internal(static_cast<AML::Integer*>(source_integer.ptr())->value))
+			return {};
+		return source_integer;
 	}
 
 	void AML::FieldElement::debug_print(int indent) const
@@ -626,28 +629,30 @@ namespace Kernel::ACPI
 		return MUST(BAN::RefPtr<Integer>::create(result.value()));
 	}
 
-	bool AML::IndexFieldElement::store(BAN::RefPtr<Node> source)
+	BAN::RefPtr<AML::Node> AML::IndexFieldElement::store(BAN::RefPtr<Node> source)
 	{
 		if (access_rules.access_attrib != FieldRules::AccessAttrib::Normal)
 		{
 			AML_TODO("FieldElement with access attribute {}", static_cast<uint8_t>(access_rules.access_attrib));
 			return {};
 		}
-		auto source_integer = source->as_integer();
+
+		ASSERT(source);
+		auto source_integer = source->convert(AML::Node::ConvInteger);
 		if (!source_integer)
 		{
 			AML_TODO("IndexFieldElement store with non-integer source, type {}", static_cast<uint8_t>(source->type));
-			return false;
+			return {};
 		}
 
 		auto access_size = determine_access_size(access_rules.access_type);
 		if (!access_size.has_value())
-			return false;
+			return {};
 
 		if (access_size.value() > data_element->bit_count)
 		{
 			AML_ERROR("IndexFieldElement write_field with access size {} > data element bit count {}", access_size.value(), data_element->bit_count);
-			return false;
+			return {};
 		}
 
 		auto read_func = [&](uint64_t byte_offset) -> BAN::Optional<uint64_t> {
@@ -657,7 +662,7 @@ namespace Kernel::ACPI
 		};
 		auto write_func = [&](uint64_t byte_offset, uint64_t value) -> bool {
 			if (!index_element->store_internal(byte_offset))
-				return false;
+				return {};
 			return data_element->store_internal(value);
 		};
 
@@ -670,10 +675,10 @@ namespace Kernel::ACPI
 				ACPI::release_global_lock();
 		});
 
-		if (!perform_write_general(0, bit_count, bit_offset, access_size.value(), source_integer->value, access_rules.update_rule, read_func, write_func))
-			return false;
-
-		return true;
+		const auto source_value = static_cast<AML::Integer*>(source_integer.ptr())->value;
+		if (!perform_write_general(0, bit_count, bit_offset, access_size.value(), source_value, access_rules.update_rule, read_func, write_func))
+			return {};
+		return source_integer;
 	}
 
 	void AML::IndexFieldElement::debug_print(int indent) const
@@ -734,8 +739,8 @@ namespace Kernel::ACPI
 		context.aml_data = temp_aml_data;
 		if (!bank_value_result.success())
 			return ParseResult::Failure;
-		auto bank_value = bank_value_result.node() ? bank_value_result.node()->as_integer() : BAN::RefPtr<AML::Integer>();
-		if (!bank_value)
+		auto bank_value_node = bank_value_result.node() ? bank_value_result.node()->convert(AML::Node::ConvInteger) : BAN::RefPtr<AML::Node>();
+		if (!bank_value_node)
 		{
 			AML_ERROR("BankField BankValue is not an integer");
 			return ParseResult::Failure;
@@ -756,11 +761,12 @@ namespace Kernel::ACPI
 			if (!parse_field_element(field_context))
 				return ParseResult::Failure;
 
+		const auto bank_value = static_cast<AML::Integer*>(bank_value_node.ptr())->value;
 		for (auto& [_, element] : field_context.elements)
 		{
 			element->op_region = static_cast<OpRegion*>(op_region.ptr());
 			element->bank_selector = static_cast<FieldElement*>(bank_selector.ptr());
-			element->bank_value = bank_value->value;
+			element->bank_value = bank_value;
 
 			NameString element_name;
 			MUST(element_name.path.push_back(element->name));
@@ -776,7 +782,7 @@ namespace Kernel::ACPI
 		return ParseResult::Success;
 	}
 
-	BAN::RefPtr<AML::Node> AML::BankFieldElement::evaluate()
+	BAN::RefPtr<AML::Integer> AML::BankFieldElement::as_integer()
 	{
 		if (access_rules.access_attrib != FieldRules::AccessAttrib::Normal)
 		{
@@ -812,7 +818,7 @@ namespace Kernel::ACPI
 		return MUST(BAN::RefPtr<Integer>::create(result.value()));
 	}
 
-	bool AML::BankFieldElement::store(BAN::RefPtr<AML::Node> source)
+	BAN::RefPtr<AML::Node> AML::BankFieldElement::store(BAN::RefPtr<AML::Node> source)
 	{
 		if (access_rules.access_attrib != FieldRules::AccessAttrib::Normal)
 		{
@@ -820,16 +826,17 @@ namespace Kernel::ACPI
 			return {};
 		}
 
-		auto source_integer = source->as_integer();
+		ASSERT(source);
+		auto source_integer = source->convert(AML::Node::ConvInteger);
 		if (!source_integer)
 		{
 			AML_TODO("BankFieldElement store with non-integer source, type {}", static_cast<uint8_t>(source->type));
-			return false;
+			return {};
 		}
 
 		auto access_size = determine_access_size(access_rules.access_type);
 		if (!access_size.has_value())
-			return false;
+			return {};
 		auto read_func = [&](uint64_t byte_offset) -> BAN::Optional<uint64_t> {
 			return perform_read(op_region->region_space, byte_offset, access_size.value());
 		};
@@ -852,7 +859,10 @@ namespace Kernel::ACPI
 			return {};
 		}
 
-		return perform_write_general(op_region->region_offset, bit_count, bit_offset, access_size.value(), source_integer->value, access_rules.update_rule, read_func, write_func);
+		const auto source_value = static_cast<AML::Integer*>(source_integer.ptr())->value;
+		if (!perform_write_general(op_region->region_offset, bit_count, bit_offset, access_size.value(), source_value, access_rules.update_rule, read_func, write_func))
+			return {};
+		return source_integer;
 	}
 
 	void AML::BankFieldElement::debug_print(int indent) const

kernel/kernel/ACPI/AML/Integer.cpp

@@ -0,0 +1,180 @@
+#include <kernel/ACPI/AML/Buffer.h>
+#include <kernel/ACPI/AML/Integer.h>
+#include <kernel/ACPI/AML/String.h>
+
+namespace Kernel::ACPI
+{
+
+	AML::Integer::Integer(uint64_t value, bool constant)
+		: Node(Node::Type::Integer)
+		, value(value)
+		, constant(constant)
+	{}
+
+	BAN::Optional<bool> AML::Integer::logical_compare(BAN::RefPtr<AML::Node> node, AML::Byte binaryop)
+	{
+		auto rhs_node = node ? node->convert(AML::Node::ConvInteger) : BAN::RefPtr<AML::Node>();
+		if (!rhs_node)
+		{
+			AML_ERROR("Integer logical compare RHS cannot be converted to");
+			return {};
+		}
+		const auto rhs_value = static_cast<AML::Integer*>(rhs_node.ptr())->value;
+
+		switch (binaryop)
+		{
+			case AML::Byte::LAndOp:		return value && rhs_value;
+			case AML::Byte::LEqualOp:	return value == rhs_value;
+			case AML::Byte::LGreaterOp:	return value > rhs_value;
+			case AML::Byte::LLessOp:	return value < rhs_value;
+			case AML::Byte::LOrOp:		return value || rhs_value;
+			default:
+				ASSERT_NOT_REACHED();
+		}
+	}
+
+	BAN::RefPtr<AML::Node> AML::Integer::convert(uint8_t mask)
+	{
+		if (mask & AML::Node::ConvInteger)
+			return this;
+		if (mask & AML::Node::ConvBuffer)
+		{
+			auto buffer = MUST(BAN::RefPtr<AML::Buffer>::create());
+			MUST(buffer->buffer.resize(8));
+			for (size_t i = 0; i < 8; i++)
+				buffer->buffer[i] = (value >> (56 - i * 8)) & 0xFF;
+			return buffer;
+		}
+		if (mask & AML::Node::ConvBufferField)
+		{
+			AML_TODO("Convert Integer to BufferField");
+			return {};
+		}
+		if (mask & AML::Node::ConvFieldUnit)
+		{
+			AML_TODO("Convert Integer to FieldUnit");
+			return {};
+		}
+		if (mask & AML::Node::ConvString)
+		{
+			constexpr auto get_hex_char =
+				[](uint8_t nibble)
+				{
+					return (nibble < 10 ? '0' : 'A' - 10) + nibble;
+				};
+
+			auto string = MUST(BAN::RefPtr<AML::String>::create());
+			MUST(string->string.resize(16));
+			for (size_t i = 0; i < 16; i++)
+				string->string[i] = get_hex_char((value >> (60 - i * 4)) & 0xF);
+			return string;
+		}
+		return {};
+	}
+
+	BAN::RefPtr<AML::Node> AML::Integer::copy()
+	{
+		return MUST(BAN::RefPtr<Integer>::create(value));
+	}
+
+	BAN::RefPtr<AML::Node> AML::Integer::store(BAN::RefPtr<AML::Node> store_node)
+	{
+		if (constant)
+		{
+			AML_ERROR("Cannot store to constant integer");
+			return {};
+		}
+		auto conv_node = store_node ? store_node->convert(AML::Node::ConvInteger) : BAN::RefPtr<AML::Node>();
+		if (!conv_node)
+		{
+			AML_ERROR("Cannot store non-integer to integer");
+			return {};
+		}
+		value = static_cast<AML::Integer*>(conv_node.ptr())->value;
+		return MUST(BAN::RefPtr<AML::Integer>::create(value));
+	}
+
+	AML::ParseResult AML::Integer::parse(BAN::ConstByteSpan& aml_data)
+	{
+		switch (static_cast<AML::Byte>(aml_data[0]))
+		{
+			case AML::Byte::ZeroOp:
+				aml_data = aml_data.slice(1);
+				return ParseResult(Constants::Zero);
+			case AML::Byte::OneOp:
+				aml_data = aml_data.slice(1);
+				return ParseResult(Constants::One);
+			case AML::Byte::OnesOp:
+				aml_data = aml_data.slice(1);
+				return ParseResult(Constants::Ones);
+			case AML::Byte::BytePrefix:
+			{
+				if (aml_data.size() < 2)
+					return ParseResult::Failure;
+				const uint8_t value = aml_data[1];
+				aml_data = aml_data.slice(2);
+				return ParseResult(MUST(BAN::RefPtr<Integer>::create(value)));
+			}
+			case AML::Byte::WordPrefix:
+			{
+				if (aml_data.size() < 3)
+					return ParseResult::Failure;
+				uint16_t value = 0;
+				value |= aml_data[1] << 0;
+				value |= aml_data[2] << 8;
+				aml_data = aml_data.slice(3);
+				return ParseResult(MUST(BAN::RefPtr<Integer>::create(value)));
+			}
+			case AML::Byte::DWordPrefix:
+			{
+				if (aml_data.size() < 5)
+					return ParseResult::Failure;
+				uint32_t value = 0;
+				value |= static_cast<uint32_t>(aml_data[1]) <<  0;
+				value |= static_cast<uint32_t>(aml_data[2]) <<  8;
+				value |= static_cast<uint32_t>(aml_data[3]) << 16;
+				value |= static_cast<uint32_t>(aml_data[4]) << 24;
+				aml_data = aml_data.slice(5);
+				return ParseResult(MUST(BAN::RefPtr<Integer>::create(value)));
+			}
+			case AML::Byte::QWordPrefix:
+			{
+				if (aml_data.size() < 9)
+					return ParseResult::Failure;
+				uint64_t value = 0;
+				value |= static_cast<uint64_t>(aml_data[1]) <<  0;
+				value |= static_cast<uint64_t>(aml_data[2]) <<  8;
+				value |= static_cast<uint64_t>(aml_data[3]) << 16;
+				value |= static_cast<uint64_t>(aml_data[4]) << 24;
+				value |= static_cast<uint64_t>(aml_data[5]) << 32;
+				value |= static_cast<uint64_t>(aml_data[6]) << 40;
+				value |= static_cast<uint64_t>(aml_data[7]) << 48;
+				value |= static_cast<uint64_t>(aml_data[8]) << 56;
+				aml_data = aml_data.slice(9);
+				return ParseResult(MUST(BAN::RefPtr<Integer>::create(value)));
+			}
+			default:
+				ASSERT_NOT_REACHED();
+		}
+	}
+
+	void AML::Integer::debug_print(int indent) const
+	{
+		AML_DEBUG_PRINT_INDENT(indent);
+		if (!constant)
+			AML_DEBUG_PRINT("0x{H}", value);
+		else
+		{
+			AML_DEBUG_PRINT("Const ");
+			if (value == Constants::Zero->value)
+				AML_DEBUG_PRINT("Zero");
+			else if (value == Constants::One->value)
+				AML_DEBUG_PRINT("One");
+			else if (value == Constants::Ones->value)
+				AML_DEBUG_PRINT("Ones");
+			else
+				ASSERT_NOT_REACHED();
+		}
+	}
+
+}

kernel/kernel/ACPI/AML/NamedObject.cpp

@@ -7,24 +7,6 @@
 namespace Kernel::ACPI
 {
 
-	BAN::RefPtr<AML::Buffer> AML::Name::as_buffer()
-	{
-		ASSERT(object);
-		return object->as_buffer();
-	}
-
-	BAN::RefPtr<AML::Integer> AML::Name::as_integer()
-	{
-		ASSERT(object);
-		return object->as_integer();
-	}
-
-	BAN::RefPtr<AML::String> AML::Name::as_string()
-	{
-		ASSERT(object);
-		return object->as_string();
-	}
-
 	AML::ParseResult AML::Name::parse(ParseContext& context)
 	{
 		ASSERT(context.aml_data.size() >= 1);

kernel/kernel/ACPI/AML/Namespace.cpp

@@ -1,6 +1,7 @@
 #include <kernel/ACPI/AML/Device.h>
 #include <kernel/ACPI/AML/Integer.h>
 #include <kernel/ACPI/AML/Method.h>
+#include <kernel/ACPI/AML/Mutex.h>
 #include <kernel/ACPI/AML/Namespace.h>
 #include <kernel/ACPI/AML/ParseContext.h>
 #include <kernel/ACPI/AML/Region.h>
@@ -20,11 +21,12 @@ namespace Kernel::ACPI
 	struct DebugNode : AML::Node
 	{
 		DebugNode() : AML::Node(AML::Node::Type::Debug) {}
-		bool store(BAN::RefPtr<AML::Node> node)
+		BAN::RefPtr<AML::Node> convert(uint8_t) override { return {}; }
+		BAN::RefPtr<AML::Node> store(BAN::RefPtr<AML::Node> node)
 		{
 			node->debug_print(0);
 			AML_DEBUG_PRINTLN("");
-			return true;
+			return node;
 		}
 		void debug_print(int indent) const override
 		{
@@ -232,11 +234,14 @@ namespace Kernel::ACPI
 		ADD_PREDEFIED_NAMESPACE("_TZ"_sv);
 #undef ADD_PREDEFIED_NAMESPACE
 
+		auto gl = MUST(BAN::RefPtr<AML::Mutex>::create(NameSeg("_GL"_sv), 0, true));
+		ASSERT(s_root_namespace->add_named_object(context, AML::NameString("\\_GL"), gl));
+
 		// Add \_OSI that returns true for Linux compatibility
 		auto osi = MUST(BAN::RefPtr<AML::Method>::create(NameSeg("_OSI"_sv), 1, false, 0));
 		osi->override_function = [](AML::ParseContext& context) -> BAN::RefPtr<AML::Node> {
 			ASSERT(context.method_args[0]);
-			auto arg = context.method_args[0]->evaluate();
+			auto arg = context.method_args[0]->convert(AML::Node::ConvString);
 			if (!arg || arg->type != AML::Node::Type::String)
 			{
 				AML_ERROR("Invalid _OSI argument");

kernel/kernel/ACPI/AML/Node.cpp

@@ -1,6 +1,8 @@
 #include <kernel/ACPI/AML/Alias.h>
 #include <kernel/ACPI/AML/Buffer.h>
 #include <kernel/ACPI/AML/Bytes.h>
+#include <kernel/ACPI/AML/Conversion.h>
+#include <kernel/ACPI/AML/CopyObject.h>
 #include <kernel/ACPI/AML/Device.h>
 #include <kernel/ACPI/AML/Expression.h>
 #include <kernel/ACPI/AML/Event.h>
@@ -35,24 +37,6 @@ namespace Kernel::ACPI
 
 	uint64_t AML::Node::total_node_count = 0;
 
-	BAN::RefPtr<AML::Buffer> AML::Node::as_buffer()
-	{
-		AML_TODO("Node type {} to buffer", static_cast<uint32_t>(type));
-		return {};
-	}
-
-	BAN::RefPtr<AML::Integer> AML::Node::as_integer()
-	{
-		AML_TODO("Node type {} to integer", static_cast<uint32_t>(type));
-		return {};
-	}
-
-	BAN::RefPtr<AML::String> AML::Node::as_string()
-	{
-		AML_TODO("Node type {} to string", static_cast<uint32_t>(type));
-		return {};
-	}
-
 	AML::ParseResult AML::parse_object(AML::ParseContext& context)
 	{
 		if (context.aml_data.size() < 1)
@@ -166,6 +150,10 @@ namespace Kernel::ACPI
 			case AML::Byte::SubtractOp:
 			case AML::Byte::XorOp:
 				return AML::Expression::parse(context);
+			case AML::Byte::ToBufferOp:
+			case AML::Byte::ToIntegerOp:
+			case AML::Byte::ToStringOp:
+				return AML::Conversion::parse(context);
 			case AML::Byte::CreateBitFieldOp:
 			case AML::Byte::CreateByteFieldOp:
 			case AML::Byte::CreateWordFieldOp:
@@ -186,10 +174,14 @@ namespace Kernel::ACPI
 				return AML::Scope::parse(context);
 			case AML::Byte::IfOp:
 				return AML::IfElse::parse(context);
+			case AML::Byte::BreakOp:
+			case AML::Byte::ContinueOp:
 			case AML::Byte::WhileOp:
 				return AML::While::parse(context);
 			case AML::Byte::StoreOp:
 				return AML::Store::parse(context);
+			case AML::Byte::CopyObjectOp:
+				return AML::CopyObject::parse(context);
 			case AML::Byte::DerefOfOp:
 			case AML::Byte::RefOfOp:
 				return AML::Reference::parse(context);
@@ -199,6 +191,7 @@ namespace Kernel::ACPI
 				return AML::Notify::parse(context);
 			case AML::Byte::SizeOfOp:
 				return AML::SizeOf::parse(context);
+			case AML::Byte::BreakPointOp: // TODO: support breakpoints?
 			case AML::Byte::NoopOp:
 				context.aml_data = context.aml_data.slice(1);
 				return ParseResult::Success;
@@ -229,42 +222,47 @@ namespace Kernel::ACPI
 				AML_ERROR("NameString {} not found in namespace", name_string.value());
 				return ParseResult::Failure;
 			}
-			if (aml_object->type == AML::Node::Type::Method)
+
+			auto underlying = aml_object->to_underlying();
+			if (aml_object->type != AML::Node::Type::Method && underlying->type != AML::Node::Type::Method)
+				return ParseResult(aml_object);
+
+			auto* method = static_cast<AML::Method*>(
+				aml_object->type == AML::Node::Type::Method
+					? aml_object.ptr()
+					: underlying.ptr()
+			);
+
+			BAN::Array<BAN::RefPtr<AML::Node>, 7> args;
+			for (uint8_t i = 0; i < method->arg_count; i++)
 			{
-				auto* method = static_cast<AML::Method*>(aml_object.ptr());
-
-				BAN::Array<BAN::RefPtr<AML::Node>, 7> args;
-				for (uint8_t i = 0; i < method->arg_count; i++)
+				auto arg_result = AML::parse_object(context);
+				if (!arg_result.success() || !arg_result.node())
 				{
-					auto arg = AML::parse_object(context);
-					if (!arg.success())
-					{
-						AML_ERROR("Failed to parse argument {} for method {}", i, name_string.value());
-						return ParseResult::Failure;
-					}
-					args[i] = MUST(BAN::RefPtr<AML::Register>::create(arg.node()));
-				}
-
-				auto result = method->invoke_with_sync_stack(
-					context.sync_stack,
-					args[0],
-					args[1],
-					args[2],
-					args[3],
-					args[4],
-					args[5],
-					args[6]
-				);
-				if (!result.has_value())
-				{
-					AML_ERROR("Failed to evaluate {}", name_string.value());
+					AML_ERROR("Failed to parse argument {} for method {}", i, name_string.value());
 					return ParseResult::Failure;
 				}
-				if (!result.value())
-					return ParseResult::Success;
-				return ParseResult(result.value());
+				args[i] = arg_result.node();
 			}
-			return ParseResult(aml_object);
+
+			auto result = method->invoke_with_sync_stack(
+				context.sync_stack,
+				args[0],
+				args[1],
+				args[2],
+				args[3],
+				args[4],
+				args[5],
+				args[6]
+			);
+			if (!result.has_value())
+			{
+				AML_ERROR("Failed to evaluate {}", name_string.value());
+				return ParseResult::Failure;
+			}
+			if (!result.value())
+				return ParseResult::Success;
+			return ParseResult(result.value());
 		}
 
 		AML_TODO("{2H}", context.aml_data[0]);

kernel/kernel/ACPI/AML/Register.cpp

@@ -1,30 +1,71 @@
-#include <kernel/ACPI/AML/Buffer.h>
-#include <kernel/ACPI/AML/Integer.h>
+#include <kernel/ACPI/AML/Reference.h>
 #include <kernel/ACPI/AML/Register.h>
-#include <kernel/ACPI/AML/String.h>
 
-namespace Kernel::ACPI::AML
+namespace Kernel::ACPI
 {
 
-	BAN::RefPtr<AML::Buffer> Register::as_buffer()
+	AML::Register::Register()
+		: Node(Node::Type::Register)
+	{}
+	AML::Register::Register(BAN::RefPtr<AML::Node> node)
+		: Node(Node::Type::Register)
 	{
-		if (value)
-			return value->as_buffer();
-		return {};
+		if (!node)
+		{
+			value = node;
+			return;
+		}
+
+		while (node)
+		{
+			if (node->type == AML::Node::Type::Reference)
+				node = static_cast<AML::Reference*>(node.ptr())->node;
+			else if (node->type != AML::Node::Type::Buffer && node->type != AML::Node::Type::Package)
+				node = node->copy();
+			if (node->type == AML::Node::Type::Register)
+			{
+				node = static_cast<AML::Register*>(node.ptr())->value;
+				continue;
+			}
+			break;
+		}
+		ASSERT(node);
+		value = node;
 	}
 
-	BAN::RefPtr<AML::Integer> Register::as_integer()
+	BAN::RefPtr<AML::Node> AML::Register::convert(uint8_t mask)
 	{
-		if (value)
-			return value->as_integer();
-		return {};
+		if (!value)
+		{
+			AML_ERROR("Trying to convert null Register");
+			return {};
+		}
+		return value->convert(mask);
 	}
 
-	BAN::RefPtr<AML::String> Register::as_string()
+	BAN::RefPtr<AML::Node> AML::Register::store(BAN::RefPtr<AML::Node> source)
 	{
-		if (value)
-			return value->as_string();
-		return {};
+		if (source && source->type == AML::Node::Type::Register)
+			source = static_cast<AML::Register*>(source.ptr())->value;
+		if (value && value->type == AML::Node::Type::Reference)
+			return value->store(source);
+		value = source->copy();
+		return value;
+	}
+
+	void AML::Register::debug_print(int indent) const
+	{
+		AML_DEBUG_PRINT_INDENT(indent);
+		if (!value)
+			AML_DEBUG_PRINT("Register { No value }");
+		else
+		{
+			AML_DEBUG_PRINTLN("Register { ");
+			value->debug_print(indent + 1);
+			AML_DEBUG_PRINTLN("");
+			AML_DEBUG_PRINT_INDENT(indent);
+			AML_DEBUG_PRINT(" }");
+		}
 	}
 
 }

kernel/kernel/ACPI/AML/Scope.cpp

@@ -25,7 +25,7 @@ namespace Kernel::ACPI
 		auto named_object = Namespace::root_namespace()->find_object(context.scope, name_string.value(), Namespace::FindMode::Normal);
 		if (!named_object)
 		{
-			AML_DEBUG_PRINT("Scope '{}' not found in namespace", name_string.value());
+			AML_PRINT("Scope '{}' not found in namespace", name_string.value());
 			return ParseResult::Success;
 		}
 		if (!named_object->is_scope())
@@ -69,7 +69,12 @@ namespace Kernel::ACPI
 	static BAN::RefPtr<AML::Integer> evaluate_or_invoke(BAN::RefPtr<AML::Node> object)
 	{
 		if (object->type != AML::Node::Type::Method)
-			return object->as_integer();
+		{
+			auto converted = object->convert(AML::Node::ConvInteger);
+			if (!converted)
+				return {};
+			return static_cast<AML::Integer*>(converted.ptr());
+		}
 
 		auto* method = static_cast<AML::Method*>(object.ptr());
 		if (method->arg_count != 0)
@@ -85,7 +90,10 @@ namespace Kernel::ACPI
 			return {};
 		}
 
-		return result.value() ? result.value()->as_integer() : BAN::RefPtr<AML::Integer>();
+		auto result_integer = result.value()
+			? result.value()->convert(AML::Node::ConvInteger)
+			: BAN::RefPtr<AML::Node>();
+		return static_cast<AML::Integer*>(result_integer.ptr());
 	}
 
 	bool AML::initialize_scope(BAN::RefPtr<AML::Scope> scope)

kernel/kernel/ACPI/AML/String.cpp

@@ -6,7 +6,7 @@ namespace Kernel::ACPI::AML
 
 	BAN::Optional<bool> String::logical_compare(BAN::RefPtr<AML::Node> node, AML::Byte binaryop)
 	{
-		auto rhs = node ? node->as_string() : BAN::RefPtr<AML::String>();
+		auto rhs = node ? node->convert(AML::Node::ConvString) : BAN::RefPtr<AML::Node>();
 		if (!rhs)
 		{
 			AML_ERROR("String logical compare RHS is not string");
@@ -27,6 +27,23 @@ namespace Kernel::ACPI::AML
 		return buffer;
 	}
 
+	BAN::RefPtr<AML::Node> String::convert(uint8_t mask)
+	{
+		if (mask & AML::Node::ConvString)
+			return this;
+		if (mask & AML::Node::ConvInteger)
+		{
+			// Apparently this is what NT does, but its definitely not spec compliant :D
+			uint64_t value = 0;
+			const size_t bytes = BAN::Math::min<size_t>(string.size(), sizeof(value));
+			memcpy(&value, string.data(), bytes);
+			return MUST(BAN::RefPtr<AML::Integer>::create(value));
+		}
+		if (mask & AML::Node::ConvBuffer)
+			return as_buffer();
+		return {};
+	}
+
 	ParseResult String::parse(ParseContext& context)
 	{
 		ASSERT(context.aml_data.size() >= 1);