x86_64/devices: implement ISA bus stub

1 files changed, 56 insertions, 0 deletions

diff --git a/arch/x86_64/src/bus/isa.cpp b/arch/x86_64/src/bus/isa.cpp
new file mode 100644
index 0000000..3fe4f6f
--- /dev/null
+++ b/arch/x86_64/src/bus/isa.cpp
@@ -0,0 +1,56 @@
+#include "arch/bus/isa.hpp"
+
+#include "kapi/devices.hpp"
+#include "kapi/devices/device.hpp"
+#include "kapi/system.hpp"
+
+#include <kstd/memory>
+#include <kstd/print>
+#include <kstd/vector>
+
+#include <algorithm>
+#include <utility>
+
+namespace arch::bus
+{
+
+  isa::isa()
+      : kapi::devices::bus(kapi::devices::allocate_major_number(), 0, "isa")
+  {}
+
+  auto isa::add_child(kstd::unique_ptr<device> child) -> void
+  {
+    auto observer = m_observers.emplace_back(child.get());
+    m_devices.push_back(std::move(child));
+
+    if (m_initialized)
+    {
+      kstd::println("[bus:{}} Initializing child device '{}'", name(), observer->name());
+      if (!observer->init())
+      {
+        kapi::system::panic("[x86_64:devices] Failed to initialize child device");
+      }
+    }
+  }
+
+  auto isa::children() const -> kstd::vector<kstd::observer_ptr<device>> const &
+  {
+    return m_observers;
+  }
+
+  auto isa::init() -> bool
+  {
+    if (m_initialized)
+    {
+      kapi::system::panic("[x86_64:devices] ISA bus already initialized!");
+    }
+
+    m_initialized = std::ranges::fold_left(m_devices, true, [](bool acc, auto & child) -> bool {
+      kstd::println("[x86_64:devices] Initializing child device '{}'", child->name());
+      return acc && child->init();
+    });
+
+    return m_initialized;
+  }
+
+}  // namespace arch::bus
\ No newline at end of file