os: rework kernel architecture

Rework the code structure and architecture of the kernel by separating
platform-dependent and platform-independent code more cleanly. As of
this patchset, full feature parity has not been achieved. Nonetheless, a
sufficient subset of functionality has been ported to the new
architecture to demonstrate the feasibility of the new structure.

1 files changed, 20 insertions, 0 deletions

diff --git a/arch/x86_64/src/kapi/cio.cpp b/arch/x86_64/src/kapi/cio.cpp
new file mode 100644
index 0000000..ade02aa
--- /dev/null
+++ b/arch/x86_64/src/kapi/cio.cpp
@@ -0,0 +1,20 @@
+#include "kapi/cio.hpp"
+
+#include "x86_64/vga/text.hpp"
+
+#include <optional>
+
+namespace teachos::cio
+{
+
+  // NOLINTNEXTLINE(cppcoreguidelines-avoid-non-const-global-variables)
+  auto static constinit vga_device = std::optional<vga::x86_64::text::device>{};
+
+  auto init() -> void
+  {
+    vga_device.emplace();
+    vga_device->cursor(false);
+    set_output_device(*vga_device);
+  }
+
+}  // namespace teachos::cio