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, 29 insertions, 0 deletions

diff --git a/arch/riscv/kernel/asm-offsets.c b/arch/riscv/kernel/asm-offsets.c
new file mode 100644
index 0000000..edecab7
--- /dev/null
+++ b/arch/riscv/kernel/asm-offsets.c
@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// Copyright (C) 2026 Richard Qin
+//
+// arch/riscv/kernel/asm-offsets.c — emit struct field offsets and
+// scalar constants for consumption by assembly sources (head.S etc.).
+//
+// 1:1 with Linux arch/riscv/kernel/asm-offsets.c.  The Makefile
+// compiles this to an .s file (not .o) and runs
+// scripts/extract-asm-offsets.sed over the output to produce
+// include/generated/asm-offsets.h.
+//
+// Adding a new offset: include the struct's header, add an OFFSET()
+// or DEFINE() line below, rebuild.  head.S can then reference the
+// generated #define directly.
+
+#include <lume/kbuild.h>
+#include <lume/kernel_map.h>
+
+void asm_offsets(void)
+{
+    COMMENT("LumeOS asm-offsets — struct kernel_mapping field offsets");
+    OFFSET(KERNEL_MAP_VIRT_ADDR,            kernel_mapping, virt_addr);
+    OFFSET(KERNEL_MAP_VIRT_OFFSET,          kernel_mapping, virt_offset);
+    OFFSET(KERNEL_MAP_PHYS_ADDR,            kernel_mapping, phys_addr);
+    OFFSET(KERNEL_MAP_SIZE,                 kernel_mapping, size);
+    OFFSET(KERNEL_MAP_VA_PA_OFFSET,         kernel_mapping, va_pa_offset);
+    OFFSET(KERNEL_MAP_PAGE_OFFSET,          kernel_mapping, page_offset);
+    OFFSET(KERNEL_MAP_VA_KERNEL_PA_OFFSET,  kernel_mapping, va_kernel_pa_offset);
+}