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.
6 * The V3VEE Project is a joint project between Northwestern University
7 * and the University of New Mexico. You can find out more at
10 * Copyright (c) 2010, Peter Dinda <pdinda@northwestern.edu>
11 * Copyright (c) 2010, The V3VEE Project <http://www.v3vee.org>
12 * All rights reserved.
14 * Author: Peter Dinda <pdinda@northwestern.edu>
16 * This is free software. You are permitted to use,
17 * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
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 #include <devices/serial.h>
32 struct vm_device *frontend_dev;
33 struct v3_stream_ops stream_ops;
36 static int stream_read(char *buf, uint_t length, void *private_data)
38 struct vm_device *dev = (struct vm_device *) private_data;
39 struct stream_state *state = (struct stream_state *) dev->private_data;
41 return V3_StreamRead(state->stream_out,buf,length);
44 static int stream_write(char *buf, uint_t length, void *private_data)
46 struct vm_device *dev = (struct vm_device *) private_data;
47 struct stream_state *state = (struct stream_state *) dev->private_data;
49 return V3_StreamWrite(state->stream_out,buf,length);
53 static void notify(void * data){
54 struct stream_state *state = (struct stream_state *)data;
58 len = V3_StreamRead(state->stream_in, temp, 1024);
59 state->stream_ops.input(temp, len, state->stream_ops.front_data);
62 static struct v3_device_ops dev_ops = {
69 static int stream_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg)
71 v3_cfg_tree_t * frontend_cfg = v3_cfg_subtree(cfg, "frontend");
72 const char * frontend_tag = v3_cfg_val(frontend_cfg, "tag");
73 struct vm_device * frontend = v3_find_dev(vm, frontend_tag);
74 char * dev_id = v3_cfg_val(cfg, "ID");
75 char * stream_in = v3_cfg_val(cfg, "stream_in");
76 char * stream_out = v3_cfg_val(cfg, "stream_out");
77 struct stream_state *state;
80 V3_ASSERT(frontend_cfg);
81 V3_ASSERT(frontend_tag);
84 V3_ASSERT(stream_out);
86 state = (struct stream_state *)V3_Malloc(sizeof(struct stream_state));
88 state->frontend_dev = frontend;
90 state->stream_out = V3_StreamOpen(stream_out, NULL, NULL, STREAM_OPEN_MODE_READ | STREAM_OPEN_MODE_WRITE);
91 state->stream_in = V3_StreamOpen(stream_in, notify, state, STREAM_OPEN_MODE_READ | STREAM_OPEN_MODE_WRITE);
92 if (!state->stream_out || !state->stream_in) {
93 PrintError("Could not open stream %s %s\n", stream_in, stream_out);
98 struct vm_device *dev = v3_allocate_device(dev_id, &dev_ops, state);
101 if (v3_attach_device(vm, dev) == -1) {
102 PrintError("Could not attach device %s\n", dev_id);
107 state->stream_ops.read = stream_read;
108 state->stream_ops.write = stream_write;
110 v3_stream_register_serial(frontend, &(state->stream_ops), dev);
115 device_register("STREAM", stream_init)