Merge branch 'fmorgner/develop-BA-FS26/apci' into develop-BA-FS26

This patchset introduces basic support for ACPI. Currently, the only
user of that support is the CPU discovery subsystem. It uses the
processed ACPI information to initialize CPU core devices and their
associated local APICs.

1 files changed, 45 insertions, 0 deletions

diff --git a/kernel/src/devices/cpu.cpp b/kernel/src/devices/cpu.cpp
new file mode 100644
index 0000000..eb10d74
--- /dev/null
+++ b/kernel/src/devices/cpu.cpp
@@ -0,0 +1,45 @@
+#include "kernel/devices/cpu.hpp"
+
+#include "kapi/devices.hpp"
+#include "kapi/platform.hpp"
+
+#include <kstd/print>
+
+#include <cstddef>
+#include <cstdint>
+
+namespace kernel::devices
+{
+
+  cpu::core::core(std::size_t major_number, std::size_t minor_number, std::uint64_t hardware_id, bool is_bsp)
+      : kapi::devices::bus{major_number, minor_number, "cpu_core"}
+      , m_hardware_id{hardware_id}
+      , m_is_bsp{is_bsp}
+  {}
+
+  auto cpu::core::hardware_id() const -> std::uint64_t
+  {
+    return m_hardware_id;
+  }
+
+  auto cpu::core::is_bsp() const -> bool
+  {
+    return m_is_bsp;
+  }
+
+  cpu::cpu(std::size_t major_number)
+      : kapi::devices::bus{major_number, 0, "cpu"}
+  {}
+
+  auto cpu::probe() -> bool
+  {
+    if (!kapi::platform::discover_cpu_topology(*this))
+    {
+      kstd::println("[OS:DEV] Failed to discover CPU topology");
+      return false;
+    }
+
+    return true;
+  }
+
+}  // namespace kernel::devices
\ No newline at end of file