Initial Spring 2016 commit.

2015-12-23 00:50:04 +00:00
commit cafa9f5690
732 changed files with 92195 additions and 0 deletions
--- a/kern/include/device.h
+++ b/kern/include/device.h
@@ -0,0 +1,87 @@
+/*
+ * Copyright (c) 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009
+ *	The President and Fellows of Harvard College.
+ *
+ * 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 the University 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 UNIVERSITY 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 UNIVERSITY 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 _DEVICE_H_
+#define _DEVICE_H_
+
+/*
+ * Devices.
+ */
+
+
+struct uio;  /* in <uio.h> */
+
+/*
+ * Filesystem-namespace-accessible device.
+ */
+struct device {
+	const struct device_ops *d_ops;
+
+	blkcnt_t d_blocks;
+	blksize_t d_blocksize;
+
+	dev_t d_devnumber;	/* serial number for this device */
+
+	void *d_data;		/* device-specific data */
+};
+
+/*
+ * Device operations.
+ *      devop_eachopen - called on each open call to allow denying the open
+ *      devop_io - for both reads and writes (the uio indicates the direction)
+ *      devop_ioctl - miscellaneous control operations
+ */
+struct device_ops {
+	int (*devop_eachopen)(struct device *, int flags_from_open);
+	int (*devop_io)(struct device *, struct uio *);
+	int (*devop_ioctl)(struct device *, int op, userptr_t data);
+};
+
+/*
+ * Macros to shorten the calling sequences.
+ */
+#define DEVOP_EACHOPEN(d, f)	((d)->d_ops->devop_eachopen(d, f))
+#define DEVOP_IO(d, u)		((d)->d_ops->devop_io(d, u))
+#define DEVOP_IOCTL(d, op, p)	((d)->d_ops->devop_ioctl(d, op, p))
+
+
+/* Create vnode for a vfs-level device. */
+struct vnode *dev_create_vnode(struct device *dev);
+
+/* Undo dev_create_vnode. */
+void dev_uncreate_vnode(struct vnode *vn);
+
+/* Initialization functions for builtin vfs-level devices. */
+void devnull_create(void);
+
+/* Function that kicks off device probe and attach. */
+void dev_bootstrap(void);
+
+
+#endif /* _DEVICE_H_ */