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, 83 deletions

diff --git a/na/mm/slab.h b/na/mm/slab.h
deleted file mode 100644
index 909ee62..0000000
--- a/na/mm/slab.h
+++ /dev/null
@@ -1,83 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/* Copyright (C) 2026 Richard Qin */
-
-#pragma once
-
-/*
- * SLUB Allocator — module-private header
- *
- * SLUB = Simple List of Unfull Blocks.
- * Metadata lives in Page descriptors (no per-page Slab header).
- * Free object list is embedded inside the objects themselves.
- * Per-CPU "active page" eliminates lock contention on the fast path.
- *
- * Reference: docs/specs/slab.md
- */
-
-#include <lume/types.h>
-#include <lume/config.h>
-#include <lume/page.h>
-#include <lume/list.h>
-#include <kernel/sync/spinlock.h>
-
-/* Size classes: 8, 16, 32, 64, 128, 256, 512, 1024, 2048 */
-inline constexpr int kNumSizeClasses = 9;
-inline constexpr uint32 kSizeClasses[kNumSizeClasses] = {
-    8, 16, 32, 64, 128, 256, 512, 1024, 2048
-};
-
-/* Per-CPU active slab page pointer */
-struct PerCpuSlab {
-    Page* active;  // Currently used slab page (nullptr if none)
-};
-
-/*
- * KmemCache — manages a pool of fixed-size objects.
- *
- * Lock contract:
- *   lock_ protects partial_ list only.
- *   Per-CPU cpu_slab_ access requires interrupts disabled.
- *   PMM calls happen outside lock_ to avoid lock ordering issues.
- */
-class KmemCache {
-public:
-    KmemCache() = default;
-
-    // Explicit init (Placement New / BSS pattern)
-    void init(const char* name, uint32 obj_size, uint32 obj_align);
-
-    // Allocate one object. Returns nullptr on OOM.
-    void* alloc();
-
-    // Free one object back to its owning page.
-    void free(void* obj);
-
-    const char* name() const { return name_; }
-    uint32 obj_size() const { return obj_size_; }
-
-private:
-    // Get a partially-filled page from the partial list (lock must be held)
-    Page* get_partial();
-
-    // Put a page onto the partial list (lock must be held)
-    void put_partial(Page* page);
-
-    // Remove a page from the partial list (lock must be held)
-    void remove_partial(Page* page);
-
-    // Allocate a new page from PMM and format it as a slab
-    Page* new_slab();
-
-    Spinlock lock_;                  // Protects partial_ only
-    list_node partial_;              // Partially-filled slab pages
-
-    PerCpuSlab cpu_slab_[kMaxCpus];  // Per-CPU active page
-
-    const char* name_ = "uninit";
-    uint32 obj_size_  = 0;           // Aligned object size (bytes)
-    uint32 obj_align_ = 0;           // Alignment requirement
-    uint32 objs_per_slab_ = 0;      // Objects per 4KB page
-};
-
-/* Global size-class caches */
-extern KmemCache g_size_caches[kNumSizeClasses];