kernel: let arch initialize the ACPI manager

1 files changed, 39 insertions, 2 deletions

diff --git a/arch/x86_64/src/devices/init.cpp b/arch/x86_64/src/devices/init.cpp
index 6cba986..7f0faa4 100644
--- a/arch/x86_64/src/devices/init.cpp
+++ b/arch/x86_64/src/devices/init.cpp
@@ -1,13 +1,18 @@
 #include "arch/devices/init.hpp"
 
+#include "kapi/acpi.hpp"
+#include "kapi/cpu.hpp"
 #include "kapi/devices.hpp"
 
+#include "arch/boot/boot.hpp"
 #include "arch/bus/isa.hpp"
 #include "arch/devices/legacy_pit.hpp"
 
 #include <kstd/memory>
 #include <kstd/print>
 
+#include <acpi/acpi.hpp>
+
 #include <cstdint>
 #include <utility>
 
@@ -17,9 +22,41 @@ namespace arch::devices
   namespace
   {
     constexpr auto pit_frequency_in_hz = std::uint32_t{100u};
-  }
 
-  auto init_acpi_devices() -> void {}
+    auto get_acpi_root_pointer() -> kstd::observer_ptr<::acpi::rsdp const>
+    {
+      auto const & mbi = kapi::boot::bootstrap_information.mbi;
+      auto system_description_pointer = static_cast<::acpi::rsdp const *>(nullptr);
+
+      if (auto const & xsdp = mbi->maybe_acpi_xsdp())
+      {
+        auto data = xsdp->pointer().data();
+
+        system_description_pointer = reinterpret_cast<::acpi::xsdp const *>(data);
+      }
+      else if (auto const & rsdp = mbi->maybe_acpi_rsdp())
+      {
+        auto data = rsdp->pointer().data();
+        system_description_pointer = reinterpret_cast<::acpi::rsdp const *>(data);
+      }
+
+      return kstd::make_observer(system_description_pointer);
+    }
+  }  // namespace
+
+  auto init_acpi_devices() -> void
+  {
+    auto acpi_root_pointer = get_acpi_root_pointer();
+    if (acpi_root_pointer && acpi_root_pointer->validate())
+    {
+      if (kapi::acpi::init(*acpi_root_pointer))
+      {
+        kstd::println("[x86_64:DEV] ACPI subsystem initialized.");
+      }
+    }
+
+    kapi::cpu::discover_topology();
+  }
 
   auto init_legacy_devices() -> void
   {