diff options
author | Ian Moffett <ian@osmora.org> | 2024-07-11 23:54:20 -0400 |
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committer | Ian Moffett <ian@osmora.org> | 2024-07-12 00:06:27 -0400 |
commit | e93f80c60a900b747792cda7176c59521401821b (patch) | |
tree | a04e8524a007dd725a274999f636f0d8645cc62b /sys/include | |
parent | ed5e50f7402842716d00f45faff15be4d8e5bfb6 (diff) |
kernel: Add device layer
Signed-off-by: Ian Moffett <ian@osmora.org>
Diffstat (limited to 'sys/include')
-rw-r--r-- | sys/include/sys/device.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/sys/include/sys/device.h b/sys/include/sys/device.h new file mode 100644 index 0000000..3ba7141 --- /dev/null +++ b/sys/include/sys/device.h @@ -0,0 +1,54 @@ +/* + * 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_ + +#if defined(_KERNEL) +#include <sys/types.h> +#include <sys/param.h> +#include <sys/queue.h> +#include <sys/proc.h> +#include <sys/sio.h> + +typedef uint8_t devmajor_t; +typedef uint8_t dev_t; + +struct cdevsw { + int(*read)(dev_t dev, struct sio_txn *sio, int flags); +}; + +void *dev_get(devmajor_t major, dev_t dev); +dev_t dev_alloc(devmajor_t major); + +devmajor_t dev_alloc_major(void); +int dev_register(devmajor_t major, dev_t dev, void *devsw); + +#endif /* _KERNEL */ +#endif /* !_SYS_DEVICE_H_ */ |