/[gxemul]/trunk/src/devices/dev_ether.c
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Annotation of /trunk/src/devices/dev_ether.c

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Revision 20 - (hide annotations)
Mon Oct 8 16:19:23 2007 UTC (16 years, 6 months ago) by dpavlin
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++ trunk/HISTORY	(local)
$Id: HISTORY,v 1.1055 2005/11/25 22:48:36 debug Exp $
20051031	Adding disassembly support for more ARM instructions (clz,
		smul* etc), and adding a hack to support "new tiny" pages
		for StrongARM.
20051101	Minor documentation updates (NetBSD 2.0.2 -> 2.1, and OpenBSD
		3.7 -> 3.8, and lots of testing).
		Changing from 1-sector PIO mode 0 transfers to 128-sector PIO
		mode 3 (in dev_wdc).
		Various minor ARM dyntrans updates (pc-relative loads from
		within the same page as the instruction are now treated as
		constant "mov").
20051102	Re-enabling instruction combinations (they were accidentally
		disabled).
		Dyntrans TLB entries are now overwritten using a round-robin
		scheme instead of randomly. This increases performance.
		Fixing a typo in file.c (thanks to Chuan-Hua Chang for
		noticing it).
		Experimenting with adding ATAPI support to dev_wdc (to make
		emulated *BSD detect cdroms as cdroms, not harddisks).
20051104	Various minor updates.
20051105	Continuing on the ATAPI emulation. Seems to work well enough
		for a NetBSD/cats installation, but not OpenBSD/cats.
		Various other updates.
20051106	Modifying the -Y command line option to allow scaleup with
		certain graphic controllers (only dev_vga so far), not just
		scaledown.
		Some minor dyntrans cleanups.
20051107	Beginning a cleanup up the PCI subsystem (removing the
		read_register hack, etc).
20051108	Continuing the cleanup; splitting up some pci devices into a
		normal autodev device and some separate pci glue code.
20051109	Continuing on the PCI bus stuff; all old pci_*.c have been
		incorporated into normal devices and/or rewritten as glue code
		only, adding a dummy Intel 82371AB PIIX4 for Malta (not really
		tested yet).
		Minor pckbc fix so that Linux doesn't complain.
		Working on the DEC 21143 NIC (ethernet mac rom stuff mostly).
		Various other minor fixes.
20051110	Some more ARM dyntrans fine-tuning (e.g. some instruction
		combinations (cmps followed by conditional branch within the
		same page) and special cases for DPIs with regform when the
		shifter isn't used).
20051111	ARM dyntrans updates: O(n)->O(1) for just-mark-as-non-
		writable in the generic pc_to_pointers function, and some other
		minor hacks.
		Merging Cobalt and evbmips (Malta) ISA interrupt handling,
		and some minor fixes to allow Linux to accept harddisk irqs.
20051112	Minor device updates (pckbc, dec21143, lpt, ...), most
		importantly fixing the ALI M1543/M5229 so that harddisk irqs
		work with Linux/CATS.
20051113	Some more generalizations of the PCI subsystem.
		Finally took the time to add a hack for SCSI CDROM TOCs; this
		enables OpenBSD to use partition 'a' (as needed by the OpenBSD
		installer), and Windows NT's installer to get a bit further.
		Also fixing dev_wdc to allow Linux to detect ATAPI CDROMs.
		Continuing on the DEC 21143.
20051114	Minor ARM dyntrans tweaks; ARM cmps+branch optimization when
		comparing with 0, and generalizing the xchg instr. comb.
		Adding disassembly of ARM mrrc/mcrr and q{,d}{add,sub}.
20051115	Continuing on various PPC things (BATs, other address trans-
		lation things, various loads/stores, BeBox emulation, etc.).
		Beginning to work on PPC interrupt/exception support.
20051116	Factoring out some code which initializes legacy ISA devices
		from those machines that use them (bus_isa).
		Continuing on PPC interrupt/exception support.
20051117	Minor Malta fixes: RTC year offset = 80, disabling a speed hack
		which caused NetBSD to detect a too fast cpu, and adding a new
		hack to make Linux detect a faster cpu.
		Continuing on the Artesyn PM/PPC emulation mode.
		Adding an Algor emulation skeleton (P4032 and P5064);
		implementing some of the basics.
		Continuing on PPC emulation in general; usage of unimplemented
		SPRs is now easier to track, continuing on memory/exception
		related issues, etc.
20051118	More work on PPC emulation (tgpr0..3, exception handling,
		memory stuff, syscalls, etc.).
20051119	Changing the ARM dyntrans code to mostly use cpu->pc, and not
		necessarily use arm reg 15. Seems to work.
		Various PPC updates; continuing on the PReP emulation mode.
20051120	Adding a workaround/hack to dev_mc146818 to allow NetBSD/prep
		to detect the clock.
20051121	More cleanup of the PCI bus (memory and I/O bases, etc).
		Continuing on various PPC things (decrementer and timebase,
		WDCs on obio (on PReP) use irq 13, not 14/15).
20051122	Continuing on the CPC700 controller (interrupts etc) for PMPPC,
		and on PPC stuff in general.
		Finally! After some bug fixes to the virtual to physical addr
		translation, NetBSD/{prep,pmppc} 2.1 reach userland and are
		stable enough to be interacted with.
		More PCI updates; reverse-endian device access for PowerPC etc.
20051123	Generalizing the IEEE floating point subsystem (moving it out
		from src/cpus/cpu_mips_coproc.c into a new src/float_emul.c).
		Input via slave xterms was sometimes not really working; fixing
		this for ns16550, and a warning message is now displayed if
		multiple non-xterm consoles are active.
		Adding some PPC floating point support, etc.
		Various interrupt related updates (dev_wdc, _ns16550, _8259,
		and the isa32 common code in machine.c).
		NetBSD/prep can now be installed! :-) (Well, with some manual
		commands necessary before running sysinst.) Updating the
		documentation and various other things to reflect this.
20051124	Various minor documentation updates.
		Continuing the work on the DEC 21143 NIC.
20051125	LOTS of work on the 21143. Both OpenBSD and NetBSD work fine
		with it now, except that OpenBSD sometimes gives a time-out
		warning.
		Minor documentation updates.

==============  RELEASE 0.3.7  ==============


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 20 * $Id: dev_ether.c,v 1.9 2005/11/13 00:14:08 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 dpavlin 20 DM_DYNTRANS_OK | DM_DYNTRANS_WRITE_OK |
234     DM_READS_HAVE_NO_SIDE_EFFECTS, d->buf);
235 dpavlin 12 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 dpavlin 20 DM_DEFAULT, NULL);
239 dpavlin 12
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    

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