From 0c7707f293cc4d59763ed06a1d17c8599f180aa9 Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Mon, 8 Apr 2024 22:59:59 -0400 Subject: kernel: Add device descriptors Signed-off-by: Ian Moffett --- sys/include/sys/device.h | 50 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 sys/include/sys/device.h (limited to 'sys/include') diff --git a/sys/include/sys/device.h b/sys/include/sys/device.h new file mode 100644 index 0000000..0dd1744 --- /dev/null +++ b/sys/include/sys/device.h @@ -0,0 +1,50 @@ +/* + * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of Hyra nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _SYS_DEVICE_H_ +#define _SYS_DEVICE_H_ + +#include +#include +#include + +#define DEVICE_ALLOC() dynalloc(sizeof(struct device)) + +struct device { + dev_t major, minor; + int(*write)(struct device *dev, struct sio_txn *sio); + int(*read)(struct device *dev, struct sio_txn *sio); + TAILQ_ENTRY(device) link; +}; + +struct device *device_fetch(dev_t major, dev_t minor); +dev_t device_alloc_major(void); +dev_t create_dev(struct device *dev, dev_t major, dev_t minor); + +#endif -- cgit v1.2.3