From e90b72ec3082588b296956730bd2930cf8d5d671 Mon Sep 17 00:00:00 2001 From: Richard Qin Date: Fri, 10 Jul 2026 11:31:46 +0800 Subject: 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. --- lume-legacy/include/kernel/buf.h | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 lume-legacy/include/kernel/buf.h (limited to 'lume-legacy/include/kernel/buf.h') diff --git a/lume-legacy/include/kernel/buf.h b/lume-legacy/include/kernel/buf.h new file mode 100644 index 0000000..d0d849c --- /dev/null +++ b/lume-legacy/include/kernel/buf.h @@ -0,0 +1,35 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2026 Richard QIn + */ + +#pragma once +#include "common/types.h" +#include "kernel/spinlock.h" + +#define BSIZE 1024 +#define NBUF 30 + +struct Buf +{ + int valid; // Whether the data has been read from the disk (1=valid, 0=invalid) + int disk; // Whether it has been held by the driver (dirty bit/write-back flag is usually extended here) + uint32 dev; // Device Number + uint32 blockno; // Block number + uint32 refcnt; // Reference Counting + struct Buf *prev; // LRU linked list + struct Buf *next; + uchar data[BSIZE]; + + Mutex lock; // Sleep Lock +}; + +namespace BufferCache +{ + void init(); + struct Buf *bread(uint32 dev, uint32 blockno); + void bwrite(struct Buf *b); + void brelse(struct Buf *b); + void bpin(struct Buf *b); + void bunpin(struct Buf *b); +} // namespace BufferCache -- cgit v1.2.3