From 5e0b8d508ed51004bd836384293be00950ee62c9 Mon Sep 17 00:00:00 2001 From: Pasha Date: Tue, 20 Feb 2024 18:49:50 +0000 Subject: init gnumach copy --- device/dev_hdr.h | 160 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 160 insertions(+) create mode 100644 device/dev_hdr.h (limited to 'device/dev_hdr.h') diff --git a/device/dev_hdr.h b/device/dev_hdr.h new file mode 100644 index 0000000..ac6ce7e --- /dev/null +++ b/device/dev_hdr.h @@ -0,0 +1,160 @@ +/* + * Mach Operating System + * Copyright (c) 1991,1990,1989 Carnegie Mellon University + * All Rights Reserved. + * + * Permission to use, copy, modify and distribute this software and its + * documentation is hereby granted, provided that both the copyright + * notice and this permission notice appear in all copies of the + * software, derivative works or modified versions, and any portions + * thereof, and that both notices appear in supporting documentation. + * + * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" + * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR + * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. + * + * Carnegie Mellon requests users of this software to return to + * + * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU + * School of Computer Science + * Carnegie Mellon University + * Pittsburgh PA 15213-3890 + * + * any improvements or extensions that they make and grant Carnegie Mellon + * the rights to redistribute these changes. + */ +/* + * Author: David B. Golub, Carnegie Mellon University + * Date: 3/89 + */ + +/* + * Mach device emulation definitions (i386at version). + * + * Copyright (c) 1996 The University of Utah and + * the Computer Systems Laboratory at the University of Utah (CSL). + * All rights reserved. + * + * Permission to use, copy, modify and distribute this software is hereby + * granted provided that (1) source code retains these copyright, permission, + * and disclaimer notices, and (2) redistributions including binaries + * reproduce the notices in supporting documentation, and (3) all advertising + * materials mentioning features or use of this software display the following + * acknowledgement: ``This product includes software developed by the + * Computer Systems Laboratory at the University of Utah.'' + * + * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS + * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF + * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. + * + * CSL requests users of this software to return to csl-dist@cs.utah.edu any + * improvements that they make and grant CSL redistribution rights. + * + * Author: Shantanu Goel, University of Utah CSL + */ + +#ifndef _DEVICE_DEV_HDR_H_ +#define _DEVICE_DEV_HDR_H_ + +#include +#include +#include +#include + +typedef struct dev_ops *dev_ops_t; + +/* This structure is associated with each open device port. + The port representing the device points to this structure. */ +struct device +{ + struct device_emulation_ops *emul_ops; + void *emul_data; +}; + +typedef struct device *device_t; + +#define DEVICE_NULL ((device_t) 0) + +/* + * Generic device header. May be allocated with the device, + * or built when the device is opened. + */ +struct mach_device { + decl_simple_lock_data(,ref_lock)/* lock for reference count */ + int ref_count; /* reference count */ + decl_simple_lock_data(, lock) /* lock for rest of state */ + short state; /* state: */ +#define DEV_STATE_INIT 0 /* not open */ +#define DEV_STATE_OPENING 1 /* being opened */ +#define DEV_STATE_OPEN 2 /* open */ +#define DEV_STATE_CLOSING 3 /* being closed */ + short flag; /* random flags: */ +#define D_EXCL_OPEN 0x0001 /* open only once */ + short open_count; /* number of times open */ + short io_in_progress; /* number of IOs in progress */ + boolean_t io_wait; /* someone waiting for IO to finish */ + + struct ipc_port *port; /* open port */ + queue_chain_t number_chain; /* chain for lookup by number */ + int dev_number; /* device number */ + int bsize; /* replacement for DEV_BSIZE */ + struct dev_ops *dev_ops; /* and operations vector */ + struct device dev; /* the real device structure */ +}; +typedef struct mach_device *mach_device_t; +#define MACH_DEVICE_NULL ((mach_device_t)0) + +/* + * To find and remove device entries + */ +mach_device_t device_lookup(const char *); /* by name */ + +void mach_device_reference(mach_device_t); +void mach_device_deallocate(mach_device_t); + +/* + * To find and remove port-to-device mappings + */ +device_t dev_port_lookup(ipc_port_t); +void dev_port_enter(mach_device_t); +void dev_port_remove(mach_device_t); + +typedef boolean_t (*dev_map_fn)(mach_device_t, mach_port_t); + +/* + * To call a routine on each device + */ +boolean_t dev_map(dev_map_fn, mach_port_t); + +/* + * To lock and unlock state and open-count + */ +#define device_lock(device) simple_lock(&(device)->lock) +#define device_unlock(device) simple_unlock(&(device)->lock) + +/* + * device name lookup + */ +extern boolean_t dev_name_lookup( + const char * name, + dev_ops_t *ops, /* out */ + int *unit); /* out */ + +/* + * Change an entry in the indirection list. + */ +extern void dev_set_indirection( + const char *name, + dev_ops_t ops, + int unit); + +/* + * compare device name + */ +extern boolean_t __attribute__ ((pure)) +name_equal( + const char *src, + int len, + const char *target); + +#endif /* _DEVICE_DEV_HDR_H_ */ -- cgit v1.2.1