From f456f1674d48932846eb7b5ec1df630ad67e7e3d Mon Sep 17 00:00:00 2001
From: Felix Morgner <felix.morgner@ost.ch>
Date: Mon, 6 Apr 2026 17:24:36 +0200
Subject: kernel/acpi: discover local interrupt controllers

---
 arch/x86_64/kapi/acpi.cpp | 43 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 arch/x86_64/kapi/acpi.cpp

(limited to 'arch/x86_64/kapi/acpi.cpp')

diff --git a/arch/x86_64/kapi/acpi.cpp b/arch/x86_64/kapi/acpi.cpp
new file mode 100644
index 0000000..9766154
--- /dev/null
+++ b/arch/x86_64/kapi/acpi.cpp
@@ -0,0 +1,43 @@
+#include "kapi/acpi.hpp"
+
+#include "kapi/devices.hpp"
+#include "kapi/memory.hpp"
+
+#include "arch/boot/boot.hpp"
+#include "arch/devices/local_apic.hpp"
+
+#include <kstd/memory>
+
+#include <cstddef>
+#include <cstdint>
+
+namespace kapi::acpi
+{
+
+  auto get_root_pointer() -> kstd::observer_ptr<root_system_description_pointer const>
+  {
+    auto const & mbi = kapi::boot::bootstrap_information.mbi;
+    auto system_description_pointer = static_cast<kapi::acpi::root_system_description_pointer const *>(nullptr);
+
+    if (auto const & xsdp = mbi->maybe_acpi_xsdp())
+    {
+      auto data = xsdp->pointer().data();
+
+      system_description_pointer = reinterpret_cast<kapi::acpi::root_system_description_pointer const *>(data);
+    }
+    else if (auto const & rsdp = mbi->maybe_acpi_rsdp())
+    {
+      auto data = rsdp->pointer().data();
+      system_description_pointer = reinterpret_cast<kapi::acpi::root_system_description_pointer const *>(data);
+    }
+
+    return kstd::make_observer(system_description_pointer);
+  }
+
+  auto create_local_interrupt_controller(std::size_t major, std::size_t minor, std::uint64_t hardware_id,
+                                         memory::physical_address address) -> kstd::unique_ptr<devices::device>
+  {
+    return kstd::make_unique<arch::devices::local_apic>(major, minor, hardware_id, address);
+  }
+
+}  // namespace kapi::acpi
\ No newline at end of file
-- 
cgit v1.2.3


From f50815110789a0f8f6e5ca66ffd49b26578791a9 Mon Sep 17 00:00:00 2001
From: Felix Morgner <felix.morgner@ost.ch>
Date: Mon, 6 Apr 2026 18:43:28 +0200
Subject: kernel: generalize CPU discovery

---
 arch/x86_64/kapi/acpi.cpp | 13 -------------
 1 file changed, 13 deletions(-)

(limited to 'arch/x86_64/kapi/acpi.cpp')

diff --git a/arch/x86_64/kapi/acpi.cpp b/arch/x86_64/kapi/acpi.cpp
index 9766154..ec38aee 100644
--- a/arch/x86_64/kapi/acpi.cpp
+++ b/arch/x86_64/kapi/acpi.cpp
@@ -1,16 +1,9 @@
 #include "kapi/acpi.hpp"
 
-#include "kapi/devices.hpp"
-#include "kapi/memory.hpp"
-
 #include "arch/boot/boot.hpp"
-#include "arch/devices/local_apic.hpp"
 
 #include <kstd/memory>
 
-#include <cstddef>
-#include <cstdint>
-
 namespace kapi::acpi
 {
 
@@ -34,10 +27,4 @@ namespace kapi::acpi
     return kstd::make_observer(system_description_pointer);
   }
 
-  auto create_local_interrupt_controller(std::size_t major, std::size_t minor, std::uint64_t hardware_id,
-                                         memory::physical_address address) -> kstd::unique_ptr<devices::device>
-  {
-    return kstd::make_unique<arch::devices::local_apic>(major, minor, hardware_id, address);
-  }
-
 }  // namespace kapi::acpi
\ No newline at end of file
-- 
cgit v1.2.3