Palacios Public Git Repository

To checkout Palacios execute

  git clone http://v3vee.org/palacios/palacios.web/palacios.git
This will give you the master branch. You probably want the devel branch or one of the release branches. To switch to the devel branch, simply execute
  cd palacios
  git checkout --track -b devel origin/devel
The other branches are similar.


Implementation of stream device backend, interface to host os
[palacios.git] / palacios / src / devices / stream.c
1 /* 
2  * This file is part of the Palacios Virtual Machine Monitor developed
3  * by the V3VEE Project with funding from the United States National 
4  * Science Foundation and the Department of Energy.  
5  *
6  * The V3VEE Project is a joint project between Northwestern University
7  * and the University of New Mexico.  You can find out more at 
8  * http://www.v3vee.org
9  *
10  * Copyright (c) 2010, Peter Dinda <pdinda@northwestern.edu>
11  * Copyright (c) 2010, The V3VEE Project <http://www.v3vee.org> 
12  * All rights reserved.
13  *
14  * Author: Peter Dinda <pdinda@northwestern.edu>
15  *
16  * This is free software.  You are permitted to use,
17  * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
18  */
19
20 #include <palacios/vmm.h>
21 #include <palacios/vmm_stream.h>
22 #include <palacios/vmm_dev_mgr.h>
23 #include <palacios/vmm_sprintf.h>
24 #include <palacios/vmm_host_events.h>
25 #include <palacios/vmm_lock.h>
26 #include <palacios/vmm_string.h>
27
28
29 struct stream_state {
30     void *stream;
31     struct vm_device *frontend_dev;
32 };
33
34
35 static int stream_read(char *buf, uint_t length, void *private_data) 
36 {
37     struct vm_device *dev = (struct vm_device *) private_data;
38     struct stream_state *state = (struct stream_state *) dev->private_data;
39     
40     return V3_StreamRead(state->stream,buf,length);
41 }
42
43 static int stream_write(char *buf, uint_t length, void *private_data) 
44 {
45     struct vm_device *dev = (struct vm_device *) private_data;
46     struct stream_state *state = (struct stream_state *) dev->private_data;
47     
48     return V3_StreamWrite(state->stream,buf,length);
49 }
50
51
52
53 static struct v3_stream_ops stream_ops = {
54     .write = stream_write,
55     .read = stream_read
56 };
57
58 static struct v3_device_ops dev_ops = {
59     .free = NULL,
60     .reset = NULL,
61     .start = NULL,
62     .stop = NULL,
63 };
64
65 static int stream_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) 
66 {
67     v3_cfg_tree_t * frontend_cfg = v3_cfg_subtree(cfg, "frontend");
68     const char * frontend_tag = v3_cfg_val(frontend_cfg, "tag");
69     struct vm_device * frontend = v3_find_dev(vm, frontend_tag);
70     char * dev_id = v3_cfg_val(cfg, "ID");
71     char * path = v3_cfg_val(cfg, "localname");
72
73     /* read configuration */
74     V3_ASSERT(frontend_cfg);
75     V3_ASSERT(frontend_tag);
76     V3_ASSERT(frontend);
77
78     
79     /* allocate state */
80     state = (struct cons_state *)V3_Malloc(sizeof(struct stream_state));
81     V3_ASSERT(state);
82     state->frontend_dev = frontend;
83     V3_ASSERT(path);
84         
85     /* The system is responsible for interpreting the localname of the stream */
86     state->stream = V3_StreamOpen(ttypath, STREAM_OPEN_MODE_READ | STREAM_OPEN_MODE_WRITE);
87     if (!state->stream) {
88         PrintError("Could not open localname %s\n", path);
89         V3_Free(state);
90         return -1;
91     }
92
93     /* allocate device */
94     struct vm_device *dev = v3_allocate_device(dev_id, &dev_ops, state);
95     V3_ASSERT(dev);
96
97     /* attach device to virtual machine */
98     if (v3_attach_device(vm, dev) == -1) {
99         PrintError("Could not attach device %s\n", dev_id);
100         V3_Free(state);
101         return -1;
102     }
103
104     /* attach to front-end display adapter */
105     v3_console_register_cga(frontend, &cons_ops, dev);
106
107         return 0;
108 }
109
110 device_register("CURSES_CONSOLE", cons_init)
111