From 3dcd14a0570fef3bcc68d7df42fe3ff4cd496f93 Mon Sep 17 00:00:00 2001
From: Felix Morgner <felix.morgner@ost.ch>
Date: Mon, 6 Apr 2026 14:47:37 +0200
Subject: kapi: hook ACPI initialization up to boot process

---
 kernel/kapi/acpi.cpp | 32 ++++++++++++++++++++++++++------
 1 file changed, 26 insertions(+), 6 deletions(-)

(limited to 'kernel/kapi')

diff --git a/kernel/kapi/acpi.cpp b/kernel/kapi/acpi.cpp
index aa0066d..787bcff 100644
--- a/kernel/kapi/acpi.cpp
+++ b/kernel/kapi/acpi.cpp
@@ -1,13 +1,18 @@
 #include "kapi/acpi.hpp"
 
 #include "kapi/memory.hpp"
+#include "kapi/system.hpp"
+
+#include "kernel/acpi/manager.hpp"
 
 #include <kstd/units>
 
 #include <algorithm>
+#include <atomic>
 #include <bit>
 #include <cstddef>
 #include <cstdint>
+#include <optional>
 #include <span>
 #include <string_view>
 
@@ -16,12 +21,7 @@ namespace kapi::acpi
 
   namespace
   {
-    constexpr auto validate_checksum(std::span<std::byte const> data) -> bool
-    {
-      auto sum = std::ranges::fold_left(
-          data, std::uint8_t{}, [](std::uint8_t acc, auto byte) { return static_cast<std::uint8_t>(byte) + acc; });
-      return sum == 0;
-    }
+    auto constinit manager = std::optional<kernel::acpi::manager>{};
   }  // namespace
 
   auto root_system_description_pointer::oem_id() const noexcept -> std::string_view
@@ -65,4 +65,24 @@ namespace kapi::acpi
     return validate_checksum({reinterpret_cast<std::byte const *>(this), m_length});
   }
 
+  auto init(root_system_description_pointer const & sdp) -> bool
+  {
+    auto static constinit initialized = std::atomic_flag{};
+    if (initialized.test_and_set())
+    {
+      system::panic("[OS::ACPI] The ACPI manager has already been initialized!");
+    }
+
+    manager.emplace(sdp);
+    return manager->load_tables();
+  }
+
+  auto validate_checksum(std::span<std::byte const> data) -> bool
+  {
+    auto sum = std::ranges::fold_left(data, std::uint8_t{}, [](auto acc, auto byte) {
+      return static_cast<std::uint8_t>(acc + static_cast<std::uint8_t>(byte));
+    });
+    return sum == 0;
+  }
+
 };  // namespace kapi::acpi
-- 
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