kapi: move interrupt handling to kernel

2 files changed, 46 insertions, 0 deletions

diff --git a/kernel/CMakeLists.txt b/kernel/CMakeLists.txt
index 9b1e2ad..535c441 100644
--- a/kernel/CMakeLists.txt
+++ b/kernel/CMakeLists.txt
@@ -3,6 +3,7 @@ add_executable("kernel"
     "kapi/boot_modules.cpp"
     "kapi/cio.cpp"
     "kapi/cpu.cpp"
+    "kapi/interrupts.cpp"
     "kapi/memory.cpp"
     "kapi/system.cpp"
 
diff --git a/kernel/kapi/interrupts.cpp b/kernel/kapi/interrupts.cpp
new file mode 100644
index 0000000..e79453a
--- /dev/null
+++ b/kernel/kapi/interrupts.cpp
@@ -0,0 +1,45 @@
+#include "kapi/interrupts.hpp"
+
+#include <kstd/print>
+#include <kstd/vector>
+
+#include <array>
+#include <cstdint>
+
+namespace kapi::interrupts
+{
+
+  namespace
+  {
+    auto constinit handlers = std::array<kstd::vector<handler *>, 256>{};
+  }  // namespace
+
+  auto register_handler(std::uint32_t irq_number, handler & handler) -> void
+  {
+    auto & handler_list = handlers.at(irq_number);
+    handler_list.push_back(&handler);
+  }
+
+  auto unregister_handler(std::uint32_t irq_number, handler & handler) -> void
+  {
+    static_cast<void>(irq_number);
+    static_cast<void>(handler);
+    kstd::println("[OS:interrupts] TODO: support erasure from vector.");
+  }
+
+  auto dispatch(std::uint32_t irq_number) -> status
+  {
+    auto & handler_list = handlers.at(irq_number);
+
+    for (auto handler : handler_list)
+    {
+      if (handler && handler->handle_interrupt(irq_number) == status::handled)
+      {
+        return status::handled;
+      }
+    }
+
+    return status::unhandled;
+  }
+
+}  // namespace kapi::interrupts
\ No newline at end of file