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, 63 deletions

diff --git a/na/kernel/pid.cc b/na/kernel/pid.cc
deleted file mode 100644
index 04b846b..0000000
--- a/na/kernel/pid.cc
+++ /dev/null
@@ -1,63 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/* Copyright (C) 2026 Richard Qin */
-
-/*
- * PID Allocator — Bitmap-based O(1) block search
- * Reference: docs/specs/task.md §3.2
- */
-
-#include <lume/pid.h>
-
-void PidAllocator::init()
-{
-    for (int i = 0; i < kBitmapWords; i++)
-        bitmap_[i] = 0;
-    next_hint_ = 1;
-    bitmap_[0] |= 0x1ULL; /* Reserve PID 0 (idle/swapper) only.
-                           * PID 1 (init) is allocated normally — the first
-                           * kthread_create() call gets it, matching Linux. */
-}
-
-int32 PidAllocator::alloc()
-{
-    LockGuard guard(lock_);
-
-    int32 word_start = next_hint_ / 64;
-
-    for (int32 passes = 0; passes < kBitmapWords; passes++) {
-        int32 w = (word_start + passes) % kBitmapWords;
-        uint64 free_bits = ~bitmap_[w];
-        if (free_bits == 0)
-            continue;
-
-        int bit = 0;
-        uint64 v = free_bits;
-        while ((v & 1ULL) == 0) { v >>= 1; bit++; }
-        int32 pid = w * 64 + bit;
-
-        if (pid >= kMaxPid)
-            continue;
-
-        bitmap_[w] |= (1ULL << bit);
-        next_hint_ = pid + 1;
-        if (next_hint_ >= kMaxPid)
-            next_hint_ = 2;
-
-        return pid;
-    }
-
-    return -1;
-}
-
-void PidAllocator::free(int32 pid)
-{
-    if (pid < 0 || pid >= kMaxPid)
-        return;
-
-    LockGuard guard(lock_);
-    int32 w = pid / 64;
-    int32 bit = pid % 64;
-    bitmap_[w] &= ~(1ULL << bit);
-}
-
-PidAllocator g_pid_alloc;