From 46b5a7697c800dd33d004626606c120474ace4ca Mon Sep 17 00:00:00 2001
From: Bananymous <oskari.alaranta@bananymous.com>
Date: Fri, 12 Apr 2024 01:49:54 +0300
Subject: [PATCH] Kernel: Implement dummy \_OSI method for AML

This always returns Zero (not supported)
---
 kernel/kernel/ACPI/AML/Namespace.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/kernel/kernel/ACPI/AML/Namespace.cpp b/kernel/kernel/ACPI/AML/Namespace.cpp
index b55f21e5..72b12c94 100644
--- a/kernel/kernel/ACPI/AML/Namespace.cpp
+++ b/kernel/kernel/ACPI/AML/Namespace.cpp
@@ -1,3 +1,4 @@
+#include <kernel/ACPI/AML/Method.h>
 #include <kernel/ACPI/AML/Namespace.h>
 #include <kernel/ACPI/AML/ParseContext.h>
 #include <kernel/ACPI/AML/Region.h>
@@ -6,6 +7,7 @@ namespace Kernel::ACPI
 {
 
 	static BAN::RefPtr<AML::Namespace> s_root_namespace;
+	static BAN::Vector<uint8_t> s_osi_aml_data;
 
 	BAN::RefPtr<AML::Namespace> AML::Namespace::root_namespace()
 	{
@@ -209,6 +211,13 @@ namespace Kernel::ACPI
 		ADD_PREDEFIED_NAMESPACE("_TZ"sv);
 #undef ADD_PREDEFIED_NAMESPACE
 
+		// Add dummy \_OSI
+		MUST(s_osi_aml_data.push_back(static_cast<uint8_t>(Byte::ReturnOp)));
+		MUST(s_osi_aml_data.push_back(static_cast<uint8_t>(Byte::ZeroOp)));
+		auto osi = MUST(BAN::RefPtr<AML::Method>::create(NameSeg("_OSI"sv), 1, false, 0));
+		osi->term_list = s_osi_aml_data.span();
+		ASSERT(s_root_namespace->add_named_object(context, AML::NameString("\\_OSI"), osi));
+
 		return s_root_namespace;
 	}