Kernel: Implement more features for AML parser/interpreter

Added
   - BankField
   - BufferField
   - PowerResource
   - ThermalZone
   - Reference
   - Package element forward declare

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

@@ -0,0 +1,68 @@
+#pragma once
+
+#include <BAN/Endianness.h>
+#include <kernel/ACPI/AML/Bytes.h>
+#include <kernel/ACPI/AML/ParseContext.h>
+#include <kernel/ACPI/AML/Pkg.h>
+#include <kernel/ACPI/AML/Scope.h>
+
+namespace Kernel::ACPI::AML
+{
+
+	struct PowerResource : public AML::Scope
+	{
+		uint8_t system_level;
+		uint16_t resource_order;
+
+		PowerResource(NameSeg name, uint8_t system_level, uint16_t resource_order)
+			: Scope(Node::Type::PowerResource, name)
+			, system_level(system_level)
+			, resource_order(resource_order)
+		{}
+
+		static ParseResult parse(ParseContext& context)
+		{
+			ASSERT(context.aml_data.size() >= 2);
+			ASSERT(static_cast<AML::Byte>(context.aml_data[0]) == AML::Byte::ExtOpPrefix);
+			ASSERT(static_cast<AML::ExtOp>(context.aml_data[1]) == AML::ExtOp::PowerResOp);
+			context.aml_data = context.aml_data.slice(2);
+
+			auto opt_power_res_pkg = AML::parse_pkg(context.aml_data);
+			if (!opt_power_res_pkg.has_value())
+				return ParseResult::Failure;
+			auto power_res_pkg = opt_power_res_pkg.value();
+
+			auto name = NameString::parse(power_res_pkg);
+			if (!name.has_value())
+				return ParseResult::Failure;
+
+			if (power_res_pkg.size() < 1)
+				return ParseResult::Failure;
+			uint8_t system_level = power_res_pkg[0];
+			power_res_pkg = power_res_pkg.slice(1);
+
+			if (power_res_pkg.size() < 2)
+				return ParseResult::Failure;
+			uint16_t resource_order = BAN::little_endian_to_host<uint16_t>(*reinterpret_cast<const uint16_t*>(power_res_pkg.data()));
+			power_res_pkg = power_res_pkg.slice(2);
+
+			auto power_res = MUST(BAN::RefPtr<PowerResource>::create(name->path.back(), system_level, resource_order));
+			if (!Namespace::root_namespace()->add_named_object(context, name.value(), power_res))
+				return ParseResult::Failure;
+
+#if AML_DEBUG_LEVEL >= 2
+			power_res->debug_print(0);
+			AML_DEBUG_PRINTLN("");
+#endif
+
+			return power_res->enter_context_and_parse_term_list(context, name.value(), power_res_pkg);
+		}
+
+		virtual void debug_print(int indent) const override
+		{
+			AML_DEBUG_PRINT_INDENT(indent);
+			AML_DEBUG_PRINT("PowerResource {} (SystemLevel {}, ResourceOrder {})", name, system_level, resource_order);
+		}
+	};
+
+}