feat: add compressed kernel header and implementation for RISC-V architecture

1 files changed, 37 insertions, 0 deletions

diff --git a/na/include/lume/compressed.h b/na/include/lume/compressed.h
new file mode 100644
index 0000000..8ca775d
--- /dev/null
+++ b/na/include/lume/compressed.h
@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* Copyright (C) 2026 Richard Qin */
+
+#pragma once
+
+#include <lume/types.h>
+
+inline constexpr uint64 kCompressedKernelMagic = 0x4C554D45434F4D50ULL; /* LUMECOMP */
+inline constexpr uint32 kCompressedKernelVersion = 1;
+
+enum KernelCompressionType : uint32 {
+    KERNEL_COMP_NONE = 0,
+    KERNEL_COMP_LZ4  = 1,
+};
+
+enum CompressedHeaderFlags : uint16 {
+    LUME_HDR_FLAG_STAGE3_DONE = 1u << 0,
+};
+
+struct CompressedKernelHeader {
+    uint64 magic;
+    uint32 version;
+    uint16 header_size;
+    uint16 flags;
+    uint32 compression;
+    uint32 reserved0;
+    uint64 uncompressed_size;
+    uint64 compressed_size;
+    uint64 load_phys_base;
+    uint64 reloc_offset;
+    uint64 reloc_size;
+    uint64 payload_offset;
+    uint32 header_crc32;
+    uint32 payload_crc32;
+};
+
+static_assert(sizeof(CompressedKernelHeader) == 80);