From d8dabab4fb3437f0e68645ca2eee1bec6e91def2 Mon Sep 17 00:00:00 2001
From: Bananymous <oskari.alaranta@bananymous.com>
Date: Thu, 15 Aug 2024 20:55:55 +0300
Subject: [PATCH] Kernel: Implement AML CopyObjectOp

---
 kernel/include/kernel/ACPI/AML/CopyObject.h | 66 +++++++++++++++++++++
 kernel/kernel/ACPI/AML/Node.cpp             |  3 +
 2 files changed, 69 insertions(+)
 create mode 100644 kernel/include/kernel/ACPI/AML/CopyObject.h

diff --git a/kernel/include/kernel/ACPI/AML/CopyObject.h b/kernel/include/kernel/ACPI/AML/CopyObject.h
new file mode 100644
index 00000000..bd102e3a
--- /dev/null
+++ b/kernel/include/kernel/ACPI/AML/CopyObject.h
@@ -0,0 +1,66 @@
+#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();
+			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;
+					return source;
+				case AML::Node::Type::Name:
+					static_cast<AML::Name*>(destination.ptr())->object = source;
+					return source;
+				case AML::Node::Type::Register:
+					static_cast<AML::Register*>(destination.ptr())->value = source;
+					return source;
+				default:
+					ASSERT_NOT_REACHED();
+			}
+		}
+	};
+
+}
diff --git a/kernel/kernel/ACPI/AML/Node.cpp b/kernel/kernel/ACPI/AML/Node.cpp
index 8454b101..59b6948d 100644
--- a/kernel/kernel/ACPI/AML/Node.cpp
+++ b/kernel/kernel/ACPI/AML/Node.cpp
@@ -2,6 +2,7 @@
 #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>
@@ -179,6 +180,8 @@ namespace Kernel::ACPI
 				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);