1 |
dpavlin |
12 |
/* |
2 |
|
|
* Copyright (C) 2005 Anders Gavare. All rights reserved. |
3 |
|
|
* |
4 |
|
|
* Redistribution and use in source and binary forms, with or without |
5 |
|
|
* modification, are permitted provided that the following conditions are met: |
6 |
|
|
* |
7 |
|
|
* 1. Redistributions of source code must retain the above copyright |
8 |
|
|
* notice, this list of conditions and the following disclaimer. |
9 |
|
|
* 2. Redistributions in binary form must reproduce the above copyright |
10 |
|
|
* notice, this list of conditions and the following disclaimer in the |
11 |
|
|
* documentation and/or other materials provided with the distribution. |
12 |
|
|
* 3. The name of the author may not be used to endorse or promote products |
13 |
|
|
* derived from this software without specific prior written permission. |
14 |
|
|
* |
15 |
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
16 |
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
17 |
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
18 |
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
19 |
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
20 |
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
21 |
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
22 |
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
23 |
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
24 |
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
25 |
|
|
* SUCH DAMAGE. |
26 |
|
|
* |
27 |
|
|
* |
28 |
dpavlin |
18 |
* $Id: dev_ether.c,v 1.8 2005/10/26 14:37:03 debug Exp $ |
29 |
dpavlin |
12 |
* |
30 |
|
|
* Basic "ethernet" network device. This is a simple test device which can |
31 |
|
|
* be used to send and receive packets to/from a simulated ethernet network. |
32 |
|
|
*/ |
33 |
|
|
|
34 |
|
|
#include <stdio.h> |
35 |
|
|
#include <stdlib.h> |
36 |
|
|
#include <string.h> |
37 |
|
|
|
38 |
|
|
#include "cpu.h" |
39 |
|
|
#include "device.h" |
40 |
|
|
#include "devices.h" |
41 |
|
|
#include "emul.h" |
42 |
|
|
#include "machine.h" |
43 |
|
|
#include "memory.h" |
44 |
|
|
#include "misc.h" |
45 |
|
|
#include "net.h" |
46 |
|
|
|
47 |
|
|
|
48 |
|
|
#define DEV_ETHER_MAXBUFLEN 16384 |
49 |
|
|
#define DEV_ETHER_TICK_SHIFT 14 |
50 |
|
|
|
51 |
|
|
#define STATUS_RECEIVED 0x01 |
52 |
|
|
#define STATUS_MORE_AVAIL 0x02 |
53 |
|
|
|
54 |
|
|
struct ether_data { |
55 |
|
|
unsigned char buf[DEV_ETHER_MAXBUFLEN]; |
56 |
|
|
unsigned char mac[6]; |
57 |
|
|
|
58 |
|
|
int status; |
59 |
|
|
int packet_len; |
60 |
|
|
|
61 |
|
|
int irq_nr; |
62 |
|
|
}; |
63 |
|
|
|
64 |
|
|
|
65 |
|
|
/* |
66 |
|
|
* dev_ether_tick(): |
67 |
|
|
*/ |
68 |
|
|
void dev_ether_tick(struct cpu *cpu, void *extra) |
69 |
|
|
{ |
70 |
|
|
struct ether_data *d = (struct ether_data *) extra; |
71 |
|
|
int r = 0; |
72 |
|
|
|
73 |
|
|
d->status &= ~STATUS_MORE_AVAIL; |
74 |
|
|
if (cpu->machine->emul->net != NULL) |
75 |
|
|
r = net_ethernet_rx_avail(cpu->machine->emul->net, d); |
76 |
|
|
if (r) |
77 |
|
|
d->status |= STATUS_MORE_AVAIL; |
78 |
|
|
|
79 |
|
|
if (d->status) |
80 |
|
|
cpu_interrupt(cpu, d->irq_nr); |
81 |
|
|
else |
82 |
|
|
cpu_interrupt_ack(cpu, d->irq_nr); |
83 |
|
|
} |
84 |
|
|
|
85 |
|
|
|
86 |
|
|
/* |
87 |
|
|
* dev_ether_buf_access(): |
88 |
|
|
*/ |
89 |
|
|
int dev_ether_buf_access(struct cpu *cpu, struct memory *mem, |
90 |
|
|
uint64_t relative_addr, unsigned char *data, size_t len, |
91 |
|
|
int writeflag, void *extra) |
92 |
|
|
{ |
93 |
|
|
struct ether_data *d = (struct ether_data *) extra; |
94 |
|
|
|
95 |
|
|
if (writeflag == MEM_WRITE) |
96 |
|
|
memcpy(d->buf + relative_addr, data, len); |
97 |
|
|
else |
98 |
|
|
memcpy(data, d->buf + relative_addr, len); |
99 |
|
|
return 1; |
100 |
|
|
} |
101 |
|
|
|
102 |
|
|
|
103 |
|
|
/* |
104 |
|
|
* dev_ether_access(): |
105 |
|
|
*/ |
106 |
|
|
int dev_ether_access(struct cpu *cpu, struct memory *mem, |
107 |
|
|
uint64_t relative_addr, unsigned char *data, size_t len, |
108 |
|
|
int writeflag, void *extra) |
109 |
|
|
{ |
110 |
|
|
struct ether_data *d = (struct ether_data *) extra; |
111 |
|
|
uint64_t idata = 0, odata = 0; |
112 |
|
|
unsigned char *incoming_ptr; |
113 |
|
|
int incoming_len; |
114 |
|
|
|
115 |
dpavlin |
18 |
if (writeflag == MEM_WRITE) |
116 |
|
|
idata = memory_readmax64(cpu, data, len); |
117 |
dpavlin |
12 |
|
118 |
|
|
switch (relative_addr) { |
119 |
|
|
case 0x0000: |
120 |
|
|
if (writeflag == MEM_READ) { |
121 |
|
|
odata = d->status; |
122 |
|
|
d->status = 0; |
123 |
|
|
cpu_interrupt_ack(cpu, d->irq_nr); |
124 |
|
|
} else |
125 |
|
|
fatal("[ ether: WARNING: write to status ]\n"); |
126 |
|
|
break; |
127 |
|
|
case 0x0010: |
128 |
|
|
if (writeflag == MEM_READ) |
129 |
|
|
odata = d->packet_len; |
130 |
|
|
else { |
131 |
|
|
if ((int64_t)idata < 0) { |
132 |
|
|
fatal("[ ether: ERROR: packet len too" |
133 |
|
|
" short (%i bytes) ]\n", (int)idata); |
134 |
|
|
idata = -1; |
135 |
|
|
} |
136 |
|
|
if (idata > DEV_ETHER_MAXBUFLEN) { |
137 |
|
|
fatal("[ ether: ERROR: packet len too" |
138 |
|
|
" large (%i bytes) ]\n", (int)idata); |
139 |
|
|
idata = DEV_ETHER_MAXBUFLEN; |
140 |
|
|
} |
141 |
|
|
d->packet_len = idata; |
142 |
|
|
} |
143 |
|
|
break; |
144 |
|
|
case 0x0020: |
145 |
|
|
if (writeflag == MEM_READ) |
146 |
|
|
fatal("[ ether: WARNING: read from command ]\n"); |
147 |
|
|
else { |
148 |
|
|
switch (idata) { |
149 |
|
|
case 0x00: /* Receive: */ |
150 |
|
|
if (cpu->machine->emul->net == NULL) |
151 |
|
|
fatal("[ ether: RECEIVE but no " |
152 |
|
|
"net? ]\n"); |
153 |
|
|
else { |
154 |
|
|
d->status &= ~STATUS_RECEIVED; |
155 |
|
|
net_ethernet_rx(cpu->machine->emul->net, |
156 |
|
|
d, &incoming_ptr, &incoming_len); |
157 |
|
|
if (incoming_ptr != NULL) { |
158 |
|
|
d->status |= STATUS_RECEIVED; |
159 |
|
|
if (incoming_len > |
160 |
|
|
DEV_ETHER_MAXBUFLEN) |
161 |
|
|
incoming_len = |
162 |
|
|
DEV_ETHER_MAXBUFLEN; |
163 |
|
|
memcpy(d->buf, incoming_ptr, |
164 |
|
|
incoming_len); |
165 |
|
|
free(incoming_ptr); |
166 |
|
|
d->packet_len = incoming_len; |
167 |
|
|
} |
168 |
|
|
} |
169 |
|
|
dev_ether_tick(cpu, d); |
170 |
|
|
break; |
171 |
|
|
case 0x01: /* Send */ |
172 |
|
|
if (cpu->machine->emul->net == NULL) |
173 |
|
|
fatal("[ ether: SEND but no net? ]\n"); |
174 |
|
|
else |
175 |
|
|
net_ethernet_tx(cpu->machine->emul->net, |
176 |
|
|
d, d->buf, d->packet_len); |
177 |
|
|
d->status &= ~STATUS_RECEIVED; |
178 |
|
|
dev_ether_tick(cpu, d); |
179 |
|
|
break; |
180 |
|
|
default:fatal("[ ether: UNIMPLEMENTED command 0x" |
181 |
|
|
"%02x ]\n", idata); |
182 |
|
|
cpu->running = 0; |
183 |
|
|
} |
184 |
|
|
} |
185 |
|
|
break; |
186 |
|
|
default:if (writeflag == MEM_WRITE) { |
187 |
|
|
fatal("[ ether: unimplemented write to " |
188 |
|
|
"offset 0x%x: data=0x%x ]\n", (int) |
189 |
|
|
relative_addr, (int)idata); |
190 |
|
|
} else { |
191 |
|
|
fatal("[ ether: unimplemented read from " |
192 |
|
|
"offset 0x%x ]\n", (int)relative_addr); |
193 |
|
|
} |
194 |
|
|
} |
195 |
|
|
|
196 |
|
|
if (writeflag == MEM_READ) |
197 |
|
|
memory_writemax64(cpu, data, len, odata); |
198 |
|
|
|
199 |
|
|
return 1; |
200 |
|
|
} |
201 |
|
|
|
202 |
|
|
|
203 |
|
|
/* |
204 |
|
|
* devinit_ether(): |
205 |
|
|
*/ |
206 |
|
|
int devinit_ether(struct devinit *devinit) |
207 |
|
|
{ |
208 |
|
|
struct ether_data *d = malloc(sizeof(struct ether_data)); |
209 |
|
|
size_t nlen; |
210 |
|
|
char *n1, *n2; |
211 |
|
|
char tmp[50]; |
212 |
|
|
|
213 |
|
|
nlen = strlen(devinit->name) + 80; |
214 |
|
|
n1 = malloc(nlen); |
215 |
|
|
n2 = malloc(nlen); |
216 |
|
|
|
217 |
|
|
if (d == NULL || n1 == NULL || n2 == NULL) { |
218 |
|
|
fprintf(stderr, "out of memory\n"); |
219 |
|
|
exit(1); |
220 |
|
|
} |
221 |
|
|
memset(d, 0, sizeof(struct ether_data)); |
222 |
|
|
d->irq_nr = devinit->irq_nr; |
223 |
|
|
|
224 |
|
|
net_generate_unique_mac(devinit->machine, d->mac); |
225 |
|
|
snprintf(tmp, sizeof(tmp), "%02x:%02x:%02x:%02x:%02x:%02x", |
226 |
|
|
d->mac[0], d->mac[1], d->mac[2], d->mac[3], d->mac[4], d->mac[5]); |
227 |
|
|
|
228 |
|
|
snprintf(n1, nlen, "%s [%s]", devinit->name, tmp); |
229 |
|
|
snprintf(n2, nlen, "%s [%s, control]", devinit->name, tmp); |
230 |
|
|
|
231 |
|
|
memory_device_register(devinit->machine->memory, n1, |
232 |
|
|
devinit->addr, DEV_ETHER_MAXBUFLEN, dev_ether_buf_access, (void *)d, |
233 |
|
|
MEM_DYNTRANS_OK | MEM_DYNTRANS_WRITE_OK | |
234 |
|
|
MEM_READING_HAS_NO_SIDE_EFFECTS, d->buf); |
235 |
|
|
memory_device_register(devinit->machine->memory, n2, |
236 |
|
|
devinit->addr + DEV_ETHER_MAXBUFLEN, |
237 |
|
|
DEV_ETHER_LENGTH-DEV_ETHER_MAXBUFLEN, dev_ether_access, (void *)d, |
238 |
|
|
MEM_DEFAULT, NULL); |
239 |
|
|
|
240 |
|
|
net_add_nic(devinit->machine->emul->net, d, d->mac); |
241 |
|
|
|
242 |
|
|
machine_add_tickfunction(devinit->machine, |
243 |
|
|
dev_ether_tick, d, DEV_ETHER_TICK_SHIFT); |
244 |
|
|
|
245 |
|
|
return 1; |
246 |
|
|
} |
247 |
|
|
|