refactor: promote new architecture to repository root

Archive the deprecated implementation under lume-legacy, make the new kernel the default root-level build, and update repository entry points without changing kernel behavior.

1 files changed, 0 insertions, 106 deletions

diff --git a/na/kernel/irq.cc b/na/kernel/irq.cc
deleted file mode 100644
index 4de468a..0000000
--- a/na/kernel/irq.cc
+++ /dev/null
@@ -1,106 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/* Copyright (C) 2026 Richard Qin */
-
-/*
- * IRQ Manager Implementation
- *
- * Lock-free dispatch path for interrupt context safety.
- * Registration/unregistration is protected by atomic publish.
- *
- * Reference: docs/specs/trap.md §3.3
- */
-
-#include <lume/console.h>
-#include <lume/errno.h>
-#include <lume/irq.h>
-
-/* Global singleton */
-IrqManager g_irq_manager;
-
-void IrqManager::init() {
-  for (uint32 i = 0; i < kMaxIrqs; i++) {
-    entries_[i].handler_ptr.store(0, __ATOMIC_RELAXED);
-    entries_[i].arg = nullptr;
-  }
-}
-
-int IrqManager::register_handler(uint32 irq, IrqHandler handler, void *arg) {
-  if (irq >= kMaxIrqs)
-    return -EINVAL;
-
-  if (!handler)
-    return -EINVAL;
-
-  /* Check if already registered (CAS from 0 to handler) */
-  uint64 expected = 0;
-  uint64 desired = reinterpret_cast<uint64>(handler);
-
-  /* Set arg first (before publishing handler) so dispatch sees valid arg */
-  entries_[irq].arg = arg;
-
-  if (!entries_[irq].handler_ptr.compare_exchange(expected, desired,
-                                                  __ATOMIC_ACQ_REL)) {
-    /* Already registered by someone else */
-    return -EBUSY;
-  }
-
-  return 0;
-}
-
-void IrqManager::unregister_handler(uint32 irq) {
-  if (irq >= kMaxIrqs)
-    return;
-
-  /* Clear handler with release semantics */
-  entries_[irq].handler_ptr.store(0, __ATOMIC_RELEASE);
-  entries_[irq].arg = nullptr;
-}
-
-void IrqManager::dispatch(uint32 irq) {
-  if (irq >= kMaxIrqs)
-    return;
-
-  /* Load handler with acquire semantics — pairs with register's release */
-  uint64 h = entries_[irq].handler_ptr.load(__ATOMIC_ACQUIRE);
-  if (h == 0) {
-    /* Spurious or unregistered IRQ — silently ignore */
-    return;
-  }
-
-  auto handler = reinterpret_cast<IrqHandler>(h);
-  handler(irq, entries_[irq].arg);
-}
-
-bool IrqManager::has_handler(uint32 irq) const {
-  if (irq >= kMaxIrqs)
-    return false;
-  return entries_[irq].handler_ptr.load(__ATOMIC_ACQUIRE) != 0;
-}
-
-void IrqManager::set_chip(const IrqChip* chip) {
-  chip_ = chip;
-}
-
-uint32 IrqManager::claim() const {
-  return chip_ ? chip_->claim() : 0;
-}
-
-void IrqManager::complete(uint32 irq) const {
-  if (chip_) chip_->complete(irq);
-}
-
-void IrqManager::init_ap() const {
-  if (chip_ && chip_->init_ap) chip_->init_ap();
-}
-
-void IrqManager::enable(uint32 irq) const {
-  if (chip_ && chip_->enable) chip_->enable(irq);
-}
-
-void IrqManager::disable(uint32 irq) const {
-  if (chip_ && chip_->disable) chip_->disable(irq);
-}
-
-void IrqManager::set_priority(uint32 irq, uint32 priority) const {
-  if (chip_ && chip_->set_priority) chip_->set_priority(irq, priority);
-}