| 1 |
/* |
| 2 |
* Copyright (C) 2005-2007 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 |
* $Id: dev_dec21143.c,v 1.28 2007/01/05 15:20:06 debug Exp $ |
| 29 |
* |
| 30 |
* DEC 21143 ("Tulip") ethernet controller. Implemented from Intel document |
| 31 |
* 278074-001 ("21143 PC/CardBus 10/100Mb/s Ethernet LAN Controller") and by |
| 32 |
* reverse-engineering OpenBSD and NetBSD sources. |
| 33 |
* |
| 34 |
* This device emulates several sub-components: |
| 35 |
* |
| 36 |
* 21143: This is the actual ethernet controller. |
| 37 |
* |
| 38 |
* MII: The "physical" network interface. |
| 39 |
* |
| 40 |
* SROM: A ROM area containing setting such as which MAC address to |
| 41 |
* use, and info about the MII. |
| 42 |
* |
| 43 |
* |
| 44 |
* TODO: |
| 45 |
* o) Handle _writes_ to MII registers. |
| 46 |
* o) Make it work with modern Linux kernels (as a guest OS). |
| 47 |
* o) Endianness for descriptors? If necessary. |
| 48 |
* o) Actually handle the "Setup" packet. |
| 49 |
* o) MAC filtering on incoming packets. |
| 50 |
* o) Don't hardcode as many values. |
| 51 |
*/ |
| 52 |
|
| 53 |
#include <stdio.h> |
| 54 |
#include <stdlib.h> |
| 55 |
#include <string.h> |
| 56 |
|
| 57 |
#include "cpu.h" |
| 58 |
#include "device.h" |
| 59 |
#include "devices.h" |
| 60 |
#include "emul.h" |
| 61 |
#include "interrupt.h" |
| 62 |
#include "machine.h" |
| 63 |
#include "memory.h" |
| 64 |
#include "misc.h" |
| 65 |
#include "net.h" |
| 66 |
|
| 67 |
#include "mii.h" |
| 68 |
#include "tulipreg.h" |
| 69 |
|
| 70 |
|
| 71 |
/* #define debug fatal */ |
| 72 |
|
| 73 |
#define DEC21143_TICK_SHIFT 16 |
| 74 |
|
| 75 |
#define N_REGS 32 |
| 76 |
#define ROM_WIDTH 6 |
| 77 |
|
| 78 |
struct dec21143_data { |
| 79 |
struct interrupt irq; |
| 80 |
int irq_was_asserted; |
| 81 |
|
| 82 |
/* PCI: */ |
| 83 |
int pci_little_endian; |
| 84 |
|
| 85 |
/* Ethernet address, and a network which we are connected to: */ |
| 86 |
uint8_t mac[6]; |
| 87 |
struct net *net; |
| 88 |
|
| 89 |
/* SROM emulation: */ |
| 90 |
uint8_t srom[1 << (ROM_WIDTH + 1)]; |
| 91 |
int srom_curbit; |
| 92 |
int srom_opcode; |
| 93 |
int srom_opcode_has_started; |
| 94 |
int srom_addr; |
| 95 |
|
| 96 |
/* MII PHY emulation: */ |
| 97 |
uint16_t mii_phy_reg[MII_NPHY * 32]; |
| 98 |
int mii_state; |
| 99 |
int mii_bit; |
| 100 |
int mii_opcode; |
| 101 |
int mii_phyaddr; |
| 102 |
int mii_regaddr; |
| 103 |
|
| 104 |
/* 21143 registers: */ |
| 105 |
uint32_t reg[N_REGS]; |
| 106 |
|
| 107 |
/* Internal TX state: */ |
| 108 |
uint64_t cur_tx_addr; |
| 109 |
unsigned char *cur_tx_buf; |
| 110 |
int cur_tx_buf_len; |
| 111 |
int tx_idling; |
| 112 |
int tx_idling_threshold; |
| 113 |
|
| 114 |
/* Internal RX state: */ |
| 115 |
uint64_t cur_rx_addr; |
| 116 |
unsigned char *cur_rx_buf; |
| 117 |
int cur_rx_buf_len; |
| 118 |
int cur_rx_offset; |
| 119 |
}; |
| 120 |
|
| 121 |
|
| 122 |
/* Internal states during MII data stream decode: */ |
| 123 |
#define MII_STATE_RESET 0 |
| 124 |
#define MII_STATE_START_WAIT 1 |
| 125 |
#define MII_STATE_READ_OP 2 |
| 126 |
#define MII_STATE_READ_PHYADDR_REGADDR 3 |
| 127 |
#define MII_STATE_A 4 |
| 128 |
#define MII_STATE_D 5 |
| 129 |
#define MII_STATE_IDLE 6 |
| 130 |
|
| 131 |
|
| 132 |
/* |
| 133 |
* dec21143_rx(): |
| 134 |
* |
| 135 |
* Receive a packet. (If there is no current packet, then check for newly |
| 136 |
* arrived ones. If the current packet couldn't be fully transfered the |
| 137 |
* last time, then continue on that packet.) |
| 138 |
*/ |
| 139 |
int dec21143_rx(struct cpu *cpu, struct dec21143_data *d) |
| 140 |
{ |
| 141 |
uint64_t addr = d->cur_rx_addr, bufaddr; |
| 142 |
unsigned char descr[16]; |
| 143 |
uint32_t rdes0, rdes1, rdes2, rdes3; |
| 144 |
int bufsize, buf1_size, buf2_size, i, writeback_len = 4, to_xfer; |
| 145 |
|
| 146 |
/* No current packet? Then check for new ones. */ |
| 147 |
if (d->cur_rx_buf == NULL) { |
| 148 |
/* Nothing available? Then abort. */ |
| 149 |
if (!net_ethernet_rx_avail(d->net, d)) |
| 150 |
return 0; |
| 151 |
|
| 152 |
/* Get the next packet into our buffer: */ |
| 153 |
net_ethernet_rx(d->net, d, &d->cur_rx_buf, |
| 154 |
&d->cur_rx_buf_len); |
| 155 |
|
| 156 |
/* Append a 4 byte CRC: */ |
| 157 |
d->cur_rx_buf_len += 4; |
| 158 |
d->cur_rx_buf = realloc(d->cur_rx_buf, d->cur_rx_buf_len); |
| 159 |
if (d->cur_rx_buf == NULL) { |
| 160 |
fatal("dec21143_rx(): out of memory\n"); |
| 161 |
exit(1); |
| 162 |
} |
| 163 |
/* Well... the CRC is just zeros, for now. */ |
| 164 |
memset(d->cur_rx_buf + d->cur_rx_buf_len - 4, 0, 4); |
| 165 |
|
| 166 |
d->cur_rx_offset = 0; |
| 167 |
} |
| 168 |
|
| 169 |
/* fatal("{ dec21143_rx: base = 0x%08x }\n", (int)addr); */ |
| 170 |
addr &= 0x7fffffff; |
| 171 |
|
| 172 |
if (!cpu->memory_rw(cpu, cpu->mem, addr, descr, sizeof(uint32_t), |
| 173 |
MEM_READ, PHYSICAL | NO_EXCEPTIONS)) { |
| 174 |
fatal("[ dec21143_rx: memory_rw failed! ]\n"); |
| 175 |
return 0; |
| 176 |
} |
| 177 |
|
| 178 |
rdes0 = descr[0] + (descr[1]<<8) + (descr[2]<<16) + (descr[3]<<24); |
| 179 |
|
| 180 |
/* Only use descriptors owned by the 21143: */ |
| 181 |
if (!(rdes0 & TDSTAT_OWN)) { |
| 182 |
d->reg[CSR_STATUS/8] |= STATUS_RU; |
| 183 |
return 0; |
| 184 |
} |
| 185 |
|
| 186 |
if (!cpu->memory_rw(cpu, cpu->mem, addr + sizeof(uint32_t), descr + |
| 187 |
sizeof(uint32_t), sizeof(uint32_t) * 3, MEM_READ, PHYSICAL | |
| 188 |
NO_EXCEPTIONS)) { |
| 189 |
fatal("[ dec21143_rx: memory_rw failed! ]\n"); |
| 190 |
return 0; |
| 191 |
} |
| 192 |
|
| 193 |
rdes1 = descr[4] + (descr[5]<<8) + (descr[6]<<16) + (descr[7]<<24); |
| 194 |
rdes2 = descr[8] + (descr[9]<<8) + (descr[10]<<16) + (descr[11]<<24); |
| 195 |
rdes3 = descr[12] + (descr[13]<<8) + (descr[14]<<16) + (descr[15]<<24); |
| 196 |
|
| 197 |
buf1_size = rdes1 & TDCTL_SIZE1; |
| 198 |
buf2_size = (rdes1 & TDCTL_SIZE2) >> TDCTL_SIZE2_SHIFT; |
| 199 |
bufaddr = buf1_size? rdes2 : rdes3; |
| 200 |
bufsize = buf1_size? buf1_size : buf2_size; |
| 201 |
|
| 202 |
d->reg[CSR_STATUS/8] &= ~STATUS_RS; |
| 203 |
|
| 204 |
if (rdes1 & TDCTL_ER) |
| 205 |
d->cur_rx_addr = d->reg[CSR_RXLIST / 8]; |
| 206 |
else { |
| 207 |
if (rdes1 & TDCTL_CH) |
| 208 |
d->cur_rx_addr = rdes3; |
| 209 |
else |
| 210 |
d->cur_rx_addr += 4 * sizeof(uint32_t); |
| 211 |
} |
| 212 |
|
| 213 |
debug("{ RX (%llx): 0x%08x 0x%08x 0x%x 0x%x: buf %i bytes at 0x%x }\n", |
| 214 |
(long long)addr, rdes0, rdes1, rdes2, rdes3, bufsize, (int)bufaddr); |
| 215 |
bufaddr &= 0x7fffffff; |
| 216 |
|
| 217 |
/* Turn off all status bits, and give up ownership: */ |
| 218 |
rdes0 = 0x00000000; |
| 219 |
|
| 220 |
to_xfer = d->cur_rx_buf_len - d->cur_rx_offset; |
| 221 |
if (to_xfer > bufsize) |
| 222 |
to_xfer = bufsize; |
| 223 |
|
| 224 |
/* DMA bytes from the packet into emulated physical memory: */ |
| 225 |
for (i=0; i<to_xfer; i++) { |
| 226 |
cpu->memory_rw(cpu, cpu->mem, bufaddr + i, |
| 227 |
d->cur_rx_buf + d->cur_rx_offset + i, 1, MEM_WRITE, |
| 228 |
PHYSICAL | NO_EXCEPTIONS); |
| 229 |
/* fatal(" %02x", d->cur_rx_buf[d->cur_rx_offset + i]); */ |
| 230 |
} |
| 231 |
|
| 232 |
/* Was this the first buffer in a frame? Then mark it as such. */ |
| 233 |
if (d->cur_rx_offset == 0) |
| 234 |
rdes0 |= TDSTAT_Rx_FS; |
| 235 |
|
| 236 |
d->cur_rx_offset += to_xfer; |
| 237 |
|
| 238 |
/* Frame completed? */ |
| 239 |
if (d->cur_rx_offset >= d->cur_rx_buf_len) { |
| 240 |
rdes0 |= TDSTAT_Rx_LS; |
| 241 |
|
| 242 |
/* Set the frame length: */ |
| 243 |
rdes0 |= (d->cur_rx_buf_len << 16) & TDSTAT_Rx_FL; |
| 244 |
|
| 245 |
/* Frame too long? (1518 is max ethernet frame length) */ |
| 246 |
if (d->cur_rx_buf_len > 1518) |
| 247 |
rdes0 |= TDSTAT_Rx_TL; |
| 248 |
|
| 249 |
/* Cause a receiver interrupt: */ |
| 250 |
d->reg[CSR_STATUS/8] |= STATUS_RI; |
| 251 |
|
| 252 |
free(d->cur_rx_buf); |
| 253 |
d->cur_rx_buf = NULL; |
| 254 |
d->cur_rx_buf_len = 0; |
| 255 |
} |
| 256 |
|
| 257 |
/* Descriptor writeback: */ |
| 258 |
descr[ 0] = rdes0; descr[ 1] = rdes0 >> 8; |
| 259 |
descr[ 2] = rdes0 >> 16; descr[ 3] = rdes0 >> 24; |
| 260 |
if (writeback_len > 1) { |
| 261 |
descr[ 4] = rdes1; descr[ 5] = rdes1 >> 8; |
| 262 |
descr[ 6] = rdes1 >> 16; descr[ 7] = rdes1 >> 24; |
| 263 |
descr[ 8] = rdes2; descr[ 9] = rdes2 >> 8; |
| 264 |
descr[10] = rdes2 >> 16; descr[11] = rdes2 >> 24; |
| 265 |
descr[12] = rdes3; descr[13] = rdes3 >> 8; |
| 266 |
descr[14] = rdes3 >> 16; descr[15] = rdes3 >> 24; |
| 267 |
} |
| 268 |
|
| 269 |
if (!cpu->memory_rw(cpu, cpu->mem, addr, descr, sizeof(uint32_t) |
| 270 |
* writeback_len, MEM_WRITE, PHYSICAL | NO_EXCEPTIONS)) { |
| 271 |
fatal("[ dec21143_rx: memory_rw failed! ]\n"); |
| 272 |
return 0; |
| 273 |
} |
| 274 |
|
| 275 |
return 1; |
| 276 |
} |
| 277 |
|
| 278 |
|
| 279 |
/* |
| 280 |
* dec21143_tx(): |
| 281 |
* |
| 282 |
* Transmit a packet, if the guest OS has marked a descriptor as containing |
| 283 |
* data to transmit. |
| 284 |
*/ |
| 285 |
int dec21143_tx(struct cpu *cpu, struct dec21143_data *d) |
| 286 |
{ |
| 287 |
uint64_t addr = d->cur_tx_addr, bufaddr; |
| 288 |
unsigned char descr[16]; |
| 289 |
uint32_t tdes0, tdes1, tdes2, tdes3; |
| 290 |
int bufsize, buf1_size, buf2_size, i, writeback_len = 4; |
| 291 |
|
| 292 |
addr &= 0x7fffffff; |
| 293 |
|
| 294 |
if (!cpu->memory_rw(cpu, cpu->mem, addr, descr, sizeof(uint32_t), |
| 295 |
MEM_READ, PHYSICAL | NO_EXCEPTIONS)) { |
| 296 |
fatal("[ dec21143_tx: memory_rw failed! ]\n"); |
| 297 |
return 0; |
| 298 |
} |
| 299 |
|
| 300 |
tdes0 = descr[0] + (descr[1]<<8) + (descr[2]<<16) + (descr[3]<<24); |
| 301 |
|
| 302 |
/* fatal("{ dec21143_tx: base=0x%08x, tdes0=0x%08x }\n", |
| 303 |
(int)addr, (int)tdes0); */ |
| 304 |
|
| 305 |
/* Only process packets owned by the 21143: */ |
| 306 |
if (!(tdes0 & TDSTAT_OWN)) { |
| 307 |
if (d->tx_idling > d->tx_idling_threshold) { |
| 308 |
d->reg[CSR_STATUS/8] |= STATUS_TU; |
| 309 |
d->tx_idling = 0; |
| 310 |
} else |
| 311 |
d->tx_idling ++; |
| 312 |
return 0; |
| 313 |
} |
| 314 |
|
| 315 |
if (!cpu->memory_rw(cpu, cpu->mem, addr + sizeof(uint32_t), descr + |
| 316 |
sizeof(uint32_t), sizeof(uint32_t) * 3, MEM_READ, PHYSICAL | |
| 317 |
NO_EXCEPTIONS)) { |
| 318 |
fatal("[ dec21143_tx: memory_rw failed! ]\n"); |
| 319 |
return 0; |
| 320 |
} |
| 321 |
|
| 322 |
tdes1 = descr[4] + (descr[5]<<8) + (descr[6]<<16) + (descr[7]<<24); |
| 323 |
tdes2 = descr[8] + (descr[9]<<8) + (descr[10]<<16) + (descr[11]<<24); |
| 324 |
tdes3 = descr[12] + (descr[13]<<8) + (descr[14]<<16) + (descr[15]<<24); |
| 325 |
|
| 326 |
buf1_size = tdes1 & TDCTL_SIZE1; |
| 327 |
buf2_size = (tdes1 & TDCTL_SIZE2) >> TDCTL_SIZE2_SHIFT; |
| 328 |
bufaddr = buf1_size? tdes2 : tdes3; |
| 329 |
bufsize = buf1_size? buf1_size : buf2_size; |
| 330 |
|
| 331 |
d->reg[CSR_STATUS/8] &= ~STATUS_TS; |
| 332 |
|
| 333 |
if (tdes1 & TDCTL_ER) |
| 334 |
d->cur_tx_addr = d->reg[CSR_TXLIST / 8]; |
| 335 |
else { |
| 336 |
if (tdes1 & TDCTL_CH) |
| 337 |
d->cur_tx_addr = tdes3; |
| 338 |
else |
| 339 |
d->cur_tx_addr += 4 * sizeof(uint32_t); |
| 340 |
} |
| 341 |
|
| 342 |
/* |
| 343 |
fatal("{ TX (%llx): 0x%08x 0x%08x 0x%x 0x%x: buf %i bytes at 0x%x }\n", |
| 344 |
(long long)addr, tdes0, tdes1, tdes2, tdes3, bufsize, (int)bufaddr); |
| 345 |
*/ |
| 346 |
bufaddr &= 0x7fffffff; |
| 347 |
|
| 348 |
/* Assume no error: */ |
| 349 |
tdes0 &= ~ (TDSTAT_Tx_UF | TDSTAT_Tx_EC | TDSTAT_Tx_LC |
| 350 |
| TDSTAT_Tx_NC | TDSTAT_Tx_LO | TDSTAT_Tx_TO | TDSTAT_ES); |
| 351 |
|
| 352 |
if (tdes1 & TDCTL_Tx_SET) { |
| 353 |
/* |
| 354 |
* Setup Packet. |
| 355 |
* |
| 356 |
* TODO. For now, just ignore it, and pretend it worked. |
| 357 |
*/ |
| 358 |
/* fatal("{ TX: setup packet }\n"); */ |
| 359 |
if (bufsize != 192) |
| 360 |
fatal("[ dec21143: setup packet len = %i, should be" |
| 361 |
" 192! ]\n", (int)bufsize); |
| 362 |
if (tdes1 & TDCTL_Tx_IC) |
| 363 |
d->reg[CSR_STATUS/8] |= STATUS_TI; |
| 364 |
/* New descriptor values, according to the docs: */ |
| 365 |
tdes0 = 0x7fffffff; tdes1 = 0xffffffff; |
| 366 |
tdes2 = 0xffffffff; tdes3 = 0xffffffff; |
| 367 |
} else { |
| 368 |
/* |
| 369 |
* Data Packet. |
| 370 |
*/ |
| 371 |
/* fatal("{ TX: data packet: "); */ |
| 372 |
if (tdes1 & TDCTL_Tx_FS) { |
| 373 |
/* First segment. Let's allocate a new buffer: */ |
| 374 |
/* fatal("new frame }\n"); */ |
| 375 |
d->cur_tx_buf = malloc(bufsize); |
| 376 |
d->cur_tx_buf_len = 0; |
| 377 |
} else { |
| 378 |
/* Not first segment. Increase the length of |
| 379 |
the current buffer: */ |
| 380 |
/* fatal("continuing last frame }\n"); */ |
| 381 |
d->cur_tx_buf = realloc(d->cur_tx_buf, |
| 382 |
d->cur_tx_buf_len + bufsize); |
| 383 |
} |
| 384 |
|
| 385 |
if (d->cur_tx_buf == NULL) { |
| 386 |
fatal("dec21143_tx(): out of memory\n"); |
| 387 |
exit(1); |
| 388 |
} |
| 389 |
|
| 390 |
/* "DMA" data from emulated physical memory into the buf: */ |
| 391 |
for (i=0; i<bufsize; i++) { |
| 392 |
cpu->memory_rw(cpu, cpu->mem, bufaddr + i, |
| 393 |
d->cur_tx_buf + d->cur_tx_buf_len + i, 1, MEM_READ, |
| 394 |
PHYSICAL | NO_EXCEPTIONS); |
| 395 |
/* fatal(" %02x", d->cur_tx_buf[ |
| 396 |
d->cur_tx_buf_len + i]); */ |
| 397 |
} |
| 398 |
|
| 399 |
d->cur_tx_buf_len += bufsize; |
| 400 |
|
| 401 |
/* Last segment? Then actually transmit it: */ |
| 402 |
if (tdes1 & TDCTL_Tx_LS) { |
| 403 |
/* fatal("{ TX: data frame complete. }\n"); */ |
| 404 |
if (d->net != NULL) { |
| 405 |
net_ethernet_tx(d->net, d, d->cur_tx_buf, |
| 406 |
d->cur_tx_buf_len); |
| 407 |
} else { |
| 408 |
static int warn = 0; |
| 409 |
if (!warn) |
| 410 |
fatal("[ dec21143: WARNING! Not " |
| 411 |
"connected to a network! ]\n"); |
| 412 |
warn = 1; |
| 413 |
} |
| 414 |
|
| 415 |
free(d->cur_tx_buf); |
| 416 |
d->cur_tx_buf = NULL; |
| 417 |
d->cur_tx_buf_len = 0; |
| 418 |
|
| 419 |
/* TODO: Shouldn't the OWN bit be cleared on all |
| 420 |
kinds of segments, not just the Last? */ |
| 421 |
|
| 422 |
/* We are done. */ |
| 423 |
tdes0 &= ~TDSTAT_OWN; |
| 424 |
writeback_len = 1; |
| 425 |
|
| 426 |
/* Interrupt, if Tx_IC is set: */ |
| 427 |
if (tdes1 & TDCTL_Tx_IC) |
| 428 |
d->reg[CSR_STATUS/8] |= STATUS_TI; |
| 429 |
} |
| 430 |
} |
| 431 |
|
| 432 |
/* Error summary: */ |
| 433 |
if (tdes0 & (TDSTAT_Tx_UF | TDSTAT_Tx_EC | TDSTAT_Tx_LC |
| 434 |
| TDSTAT_Tx_NC | TDSTAT_Tx_LO | TDSTAT_Tx_TO)) |
| 435 |
tdes0 |= TDSTAT_ES; |
| 436 |
|
| 437 |
/* Descriptor writeback: */ |
| 438 |
descr[ 0] = tdes0; descr[ 1] = tdes0 >> 8; |
| 439 |
descr[ 2] = tdes0 >> 16; descr[ 3] = tdes0 >> 24; |
| 440 |
if (writeback_len > 1) { |
| 441 |
descr[ 4] = tdes1; descr[ 5] = tdes1 >> 8; |
| 442 |
descr[ 6] = tdes1 >> 16; descr[ 7] = tdes1 >> 24; |
| 443 |
descr[ 8] = tdes2; descr[ 9] = tdes2 >> 8; |
| 444 |
descr[10] = tdes2 >> 16; descr[11] = tdes2 >> 24; |
| 445 |
descr[12] = tdes3; descr[13] = tdes3 >> 8; |
| 446 |
descr[14] = tdes3 >> 16; descr[15] = tdes3 >> 24; |
| 447 |
} |
| 448 |
|
| 449 |
if (!cpu->memory_rw(cpu, cpu->mem, addr, descr, sizeof(uint32_t) |
| 450 |
* writeback_len, MEM_WRITE, PHYSICAL | NO_EXCEPTIONS)) { |
| 451 |
fatal("[ dec21143_tx: memory_rw failed! ]\n"); |
| 452 |
return 0; |
| 453 |
} |
| 454 |
|
| 455 |
return 1; |
| 456 |
} |
| 457 |
|
| 458 |
|
| 459 |
/* |
| 460 |
* dev_dec21143_tick(): |
| 461 |
*/ |
| 462 |
void dev_dec21143_tick(struct cpu *cpu, void *extra) |
| 463 |
{ |
| 464 |
struct dec21143_data *d = extra; |
| 465 |
int asserted; |
| 466 |
|
| 467 |
if (d->reg[CSR_OPMODE / 8] & OPMODE_ST) |
| 468 |
while (dec21143_tx(cpu, d)) |
| 469 |
; |
| 470 |
|
| 471 |
if (d->reg[CSR_OPMODE / 8] & OPMODE_SR) |
| 472 |
while (dec21143_rx(cpu, d)) |
| 473 |
; |
| 474 |
|
| 475 |
/* Normal and Abnormal interrupt summary: */ |
| 476 |
d->reg[CSR_STATUS / 8] &= ~(STATUS_NIS | STATUS_AIS); |
| 477 |
if (d->reg[CSR_STATUS / 8] & 0x00004845) |
| 478 |
d->reg[CSR_STATUS / 8] |= STATUS_NIS; |
| 479 |
if (d->reg[CSR_STATUS / 8] & 0x0c0037ba) |
| 480 |
d->reg[CSR_STATUS / 8] |= STATUS_AIS; |
| 481 |
|
| 482 |
asserted = d->reg[CSR_STATUS / 8] & d->reg[CSR_INTEN / 8] & 0x0c01ffff; |
| 483 |
|
| 484 |
if (asserted) |
| 485 |
INTERRUPT_ASSERT(d->irq); |
| 486 |
if (!asserted && d->irq_was_asserted) |
| 487 |
INTERRUPT_DEASSERT(d->irq); |
| 488 |
|
| 489 |
/* Remember assertion flag: */ |
| 490 |
d->irq_was_asserted = asserted; |
| 491 |
} |
| 492 |
|
| 493 |
|
| 494 |
/* |
| 495 |
* mii_access(): |
| 496 |
* |
| 497 |
* This function handles accesses to the MII. Data streams seem to be of the |
| 498 |
* following format: |
| 499 |
* |
| 500 |
* vv---- starting delimiter |
| 501 |
* ... 01 xx yyyyy zzzzz a[a] dddddddddddddddd |
| 502 |
* ^---- I am starting with mii_bit = 0 here |
| 503 |
* |
| 504 |
* where x = opcode (10 = read, 01 = write) |
| 505 |
* y = PHY address |
| 506 |
* z = register address |
| 507 |
* a = on Reads: ACK bit (returned, should be 0) |
| 508 |
* on Writes: _TWO_ dummy bits (10) |
| 509 |
* d = 16 bits of data (MSB first) |
| 510 |
*/ |
| 511 |
static void mii_access(struct cpu *cpu, struct dec21143_data *d, |
| 512 |
uint32_t oldreg, uint32_t idata) |
| 513 |
{ |
| 514 |
int obit, ibit = 0; |
| 515 |
uint16_t tmp; |
| 516 |
|
| 517 |
/* Only care about data during clock cycles: */ |
| 518 |
if (!(idata & MIIROM_MDC)) |
| 519 |
return; |
| 520 |
|
| 521 |
if (idata & MIIROM_MDC && oldreg & MIIROM_MDC) |
| 522 |
return; |
| 523 |
|
| 524 |
/* fatal("[ mii_access(): 0x%08x ]\n", (int)idata); */ |
| 525 |
|
| 526 |
if (idata & MIIROM_BR) { |
| 527 |
fatal("[ mii_access(): MIIROM_BR: TODO ]\n"); |
| 528 |
return; |
| 529 |
} |
| 530 |
|
| 531 |
obit = idata & MIIROM_MDO? 1 : 0; |
| 532 |
|
| 533 |
if (d->mii_state >= MII_STATE_START_WAIT && |
| 534 |
d->mii_state <= MII_STATE_READ_PHYADDR_REGADDR && |
| 535 |
idata & MIIROM_MIIDIR) |
| 536 |
fatal("[ mii_access(): bad dir? ]\n"); |
| 537 |
|
| 538 |
switch (d->mii_state) { |
| 539 |
|
| 540 |
case MII_STATE_RESET: |
| 541 |
/* Wait for a starting delimiter (0 followed by 1). */ |
| 542 |
if (obit) |
| 543 |
return; |
| 544 |
if (idata & MIIROM_MIIDIR) |
| 545 |
return; |
| 546 |
/* fatal("[ mii_access(): got a 0 delimiter ]\n"); */ |
| 547 |
d->mii_state = MII_STATE_START_WAIT; |
| 548 |
d->mii_opcode = 0; |
| 549 |
d->mii_phyaddr = 0; |
| 550 |
d->mii_regaddr = 0; |
| 551 |
break; |
| 552 |
|
| 553 |
case MII_STATE_START_WAIT: |
| 554 |
/* Wait for a starting delimiter (0 followed by 1). */ |
| 555 |
if (!obit) |
| 556 |
return; |
| 557 |
if (idata & MIIROM_MIIDIR) { |
| 558 |
d->mii_state = MII_STATE_RESET; |
| 559 |
return; |
| 560 |
} |
| 561 |
/* fatal("[ mii_access(): got a 1 delimiter ]\n"); */ |
| 562 |
d->mii_state = MII_STATE_READ_OP; |
| 563 |
d->mii_bit = 0; |
| 564 |
break; |
| 565 |
|
| 566 |
case MII_STATE_READ_OP: |
| 567 |
if (d->mii_bit == 0) { |
| 568 |
d->mii_opcode = obit << 1; |
| 569 |
/* fatal("[ mii_access(): got first opcode bit " |
| 570 |
"(%i) ]\n", obit); */ |
| 571 |
} else { |
| 572 |
d->mii_opcode |= obit; |
| 573 |
/* fatal("[ mii_access(): got opcode = %i ]\n", |
| 574 |
d->mii_opcode); */ |
| 575 |
d->mii_state = MII_STATE_READ_PHYADDR_REGADDR; |
| 576 |
} |
| 577 |
d->mii_bit ++; |
| 578 |
break; |
| 579 |
|
| 580 |
case MII_STATE_READ_PHYADDR_REGADDR: |
| 581 |
/* fatal("[ mii_access(): got phy/reg addr bit nr %i (%i)" |
| 582 |
" ]\n", d->mii_bit - 2, obit); */ |
| 583 |
if (d->mii_bit <= 6) |
| 584 |
d->mii_phyaddr |= obit << (6-d->mii_bit); |
| 585 |
else |
| 586 |
d->mii_regaddr |= obit << (11-d->mii_bit); |
| 587 |
d->mii_bit ++; |
| 588 |
if (d->mii_bit >= 12) { |
| 589 |
/* fatal("[ mii_access(): phyaddr=0x%x regaddr=0x" |
| 590 |
"%x ]\n", d->mii_phyaddr, d->mii_regaddr); */ |
| 591 |
d->mii_state = MII_STATE_A; |
| 592 |
} |
| 593 |
break; |
| 594 |
|
| 595 |
case MII_STATE_A: |
| 596 |
switch (d->mii_opcode) { |
| 597 |
case MII_COMMAND_WRITE: |
| 598 |
if (d->mii_bit >= 13) |
| 599 |
d->mii_state = MII_STATE_D; |
| 600 |
break; |
| 601 |
case MII_COMMAND_READ: |
| 602 |
ibit = 0; |
| 603 |
d->mii_state = MII_STATE_D; |
| 604 |
break; |
| 605 |
default:debug("[ mii_access(): UNIMPLEMENTED MII opcode " |
| 606 |
"%i (probably just a bug in GXemul's " |
| 607 |
"MII data stream handling) ]\n", d->mii_opcode); |
| 608 |
d->mii_state = MII_STATE_RESET; |
| 609 |
} |
| 610 |
d->mii_bit ++; |
| 611 |
break; |
| 612 |
|
| 613 |
case MII_STATE_D: |
| 614 |
switch (d->mii_opcode) { |
| 615 |
case MII_COMMAND_WRITE: |
| 616 |
if (idata & MIIROM_MIIDIR) |
| 617 |
fatal("[ mii_access(): write: bad dir? ]\n"); |
| 618 |
obit = obit? (0x8000 >> (d->mii_bit - 14)) : 0; |
| 619 |
tmp = d->mii_phy_reg[(d->mii_phyaddr << 5) + |
| 620 |
d->mii_regaddr] | obit; |
| 621 |
if (d->mii_bit >= 29) { |
| 622 |
d->mii_state = MII_STATE_IDLE; |
| 623 |
debug("[ mii_access(): WRITE to phyaddr=0x%x " |
| 624 |
"regaddr=0x%x: 0x%04x ]\n", d->mii_phyaddr, |
| 625 |
d->mii_regaddr, tmp); |
| 626 |
} |
| 627 |
break; |
| 628 |
case MII_COMMAND_READ: |
| 629 |
if (!(idata & MIIROM_MIIDIR)) |
| 630 |
break; |
| 631 |
tmp = d->mii_phy_reg[(d->mii_phyaddr << 5) + |
| 632 |
d->mii_regaddr]; |
| 633 |
if (d->mii_bit == 13) |
| 634 |
debug("[ mii_access(): READ phyaddr=0x%x " |
| 635 |
"regaddr=0x%x: 0x%04x ]\n", d->mii_phyaddr, |
| 636 |
d->mii_regaddr, tmp); |
| 637 |
ibit = tmp & (0x8000 >> (d->mii_bit - 13)); |
| 638 |
if (d->mii_bit >= 28) |
| 639 |
d->mii_state = MII_STATE_IDLE; |
| 640 |
break; |
| 641 |
} |
| 642 |
d->mii_bit ++; |
| 643 |
break; |
| 644 |
|
| 645 |
case MII_STATE_IDLE: |
| 646 |
d->mii_bit ++; |
| 647 |
if (d->mii_bit >= 31) |
| 648 |
d->mii_state = MII_STATE_RESET; |
| 649 |
break; |
| 650 |
} |
| 651 |
|
| 652 |
d->reg[CSR_MIIROM / 8] &= ~MIIROM_MDI; |
| 653 |
if (ibit) |
| 654 |
d->reg[CSR_MIIROM / 8] |= MIIROM_MDI; |
| 655 |
} |
| 656 |
|
| 657 |
|
| 658 |
/* |
| 659 |
* srom_access(): |
| 660 |
* |
| 661 |
* This function handles reads from the Ethernet Address ROM. This is not a |
| 662 |
* 100% correct implementation, as it was reverse-engineered from OpenBSD |
| 663 |
* sources; it seems to work with OpenBSD, NetBSD, and Linux, though. |
| 664 |
* |
| 665 |
* Each transfer (if I understood this correctly) is of the following format: |
| 666 |
* |
| 667 |
* 1xx yyyyyy zzzzzzzzzzzzzzzz |
| 668 |
* |
| 669 |
* where 1xx = operation (6 means a Read), |
| 670 |
* yyyyyy = ROM address |
| 671 |
* zz...z = data |
| 672 |
* |
| 673 |
* y and z are _both_ read and written to at the same time; this enables the |
| 674 |
* operating system to sense the number of bits in y (when reading, all y bits |
| 675 |
* are 1 except the last one). |
| 676 |
*/ |
| 677 |
static void srom_access(struct cpu *cpu, struct dec21143_data *d, |
| 678 |
uint32_t oldreg, uint32_t idata) |
| 679 |
{ |
| 680 |
int obit, ibit; |
| 681 |
|
| 682 |
/* debug("CSR9 WRITE! 0x%08x\n", (int)idata); */ |
| 683 |
|
| 684 |
/* New selection? Then reset internal state. */ |
| 685 |
if (idata & MIIROM_SR && !(oldreg & MIIROM_SR)) { |
| 686 |
d->srom_curbit = 0; |
| 687 |
d->srom_opcode = 0; |
| 688 |
d->srom_opcode_has_started = 0; |
| 689 |
d->srom_addr = 0; |
| 690 |
} |
| 691 |
|
| 692 |
/* Only care about data during clock cycles: */ |
| 693 |
if (!(idata & MIIROM_SROMSK)) |
| 694 |
return; |
| 695 |
|
| 696 |
obit = 0; |
| 697 |
ibit = idata & MIIROM_SROMDI? 1 : 0; |
| 698 |
/* debug("CLOCK CYCLE! (bit %i): ", d->srom_curbit); */ |
| 699 |
|
| 700 |
/* |
| 701 |
* Linux sends more zeroes before starting the actual opcode, than |
| 702 |
* OpenBSD and NetBSD. Hopefully this is correct. (I'm just guessing |
| 703 |
* that all opcodes should start with a 1, perhaps that's not really |
| 704 |
* the case.) |
| 705 |
*/ |
| 706 |
if (!ibit && !d->srom_opcode_has_started) |
| 707 |
return; |
| 708 |
|
| 709 |
if (d->srom_curbit < 3) { |
| 710 |
d->srom_opcode_has_started = 1; |
| 711 |
d->srom_opcode <<= 1; |
| 712 |
d->srom_opcode |= ibit; |
| 713 |
/* debug("opcode input '%i'\n", ibit); */ |
| 714 |
} else { |
| 715 |
switch (d->srom_opcode) { |
| 716 |
case TULIP_SROM_OPC_READ: |
| 717 |
if (d->srom_curbit < ROM_WIDTH + 3) { |
| 718 |
obit = d->srom_curbit < ROM_WIDTH + 2; |
| 719 |
d->srom_addr <<= 1; |
| 720 |
d->srom_addr |= ibit; |
| 721 |
} else { |
| 722 |
uint16_t romword = d->srom[d->srom_addr*2] |
| 723 |
+ (d->srom[d->srom_addr*2+1] << 8); |
| 724 |
if (d->srom_curbit == ROM_WIDTH + 3) |
| 725 |
debug("[ dec21143: ROM read from offset" |
| 726 |
" 0x%03x: 0x%04x ]\n", |
| 727 |
d->srom_addr, romword); |
| 728 |
obit = romword & (0x8000 >> |
| 729 |
(d->srom_curbit - ROM_WIDTH - 3))? 1 : 0; |
| 730 |
} |
| 731 |
break; |
| 732 |
default:fatal("[ dec21243: unimplemented SROM/EEPROM " |
| 733 |
"opcode %i ]\n", d->srom_opcode); |
| 734 |
} |
| 735 |
d->reg[CSR_MIIROM / 8] &= ~MIIROM_SROMDO; |
| 736 |
if (obit) |
| 737 |
d->reg[CSR_MIIROM / 8] |= MIIROM_SROMDO; |
| 738 |
/* debug("input '%i', output '%i'\n", ibit, obit); */ |
| 739 |
} |
| 740 |
|
| 741 |
d->srom_curbit ++; |
| 742 |
|
| 743 |
/* |
| 744 |
* Done opcode + addr + data? Then restart. (At least NetBSD does |
| 745 |
* sequential reads without turning selection off and then on.) |
| 746 |
*/ |
| 747 |
if (d->srom_curbit >= 3 + ROM_WIDTH + 16) { |
| 748 |
d->srom_curbit = 0; |
| 749 |
d->srom_opcode = 0; |
| 750 |
d->srom_opcode_has_started = 0; |
| 751 |
d->srom_addr = 0; |
| 752 |
} |
| 753 |
} |
| 754 |
|
| 755 |
|
| 756 |
/* |
| 757 |
* dec21143_reset(): |
| 758 |
* |
| 759 |
* Set the 21143 registers, SROM, and MII data to reasonable values. |
| 760 |
*/ |
| 761 |
static void dec21143_reset(struct cpu *cpu, struct dec21143_data *d) |
| 762 |
{ |
| 763 |
int leaf; |
| 764 |
|
| 765 |
if (d->cur_rx_buf != NULL) |
| 766 |
free(d->cur_rx_buf); |
| 767 |
if (d->cur_tx_buf != NULL) |
| 768 |
free(d->cur_tx_buf); |
| 769 |
d->cur_rx_buf = d->cur_tx_buf = NULL; |
| 770 |
|
| 771 |
memset(d->reg, 0, sizeof(uint32_t) * N_REGS); |
| 772 |
memset(d->srom, 0, sizeof(d->srom)); |
| 773 |
memset(d->mii_phy_reg, 0, sizeof(d->mii_phy_reg)); |
| 774 |
|
| 775 |
/* Register values at reset, according to the manual: */ |
| 776 |
d->reg[CSR_BUSMODE / 8] = 0xfe000000; /* csr0 */ |
| 777 |
d->reg[CSR_MIIROM / 8] = 0xfff483ff; /* csr9 */ |
| 778 |
d->reg[CSR_SIACONN / 8] = 0xffff0000; /* csr13 */ |
| 779 |
d->reg[CSR_SIATXRX / 8] = 0xffffffff; /* csr14 */ |
| 780 |
d->reg[CSR_SIAGEN / 8] = 0x8ff00000; /* csr15 */ |
| 781 |
|
| 782 |
d->tx_idling_threshold = 10; |
| 783 |
d->cur_rx_addr = d->cur_tx_addr = 0; |
| 784 |
|
| 785 |
/* Version (= 1) and Chip count (= 1): */ |
| 786 |
d->srom[TULIP_ROM_SROM_FORMAT_VERION] = 1; |
| 787 |
d->srom[TULIP_ROM_CHIP_COUNT] = 1; |
| 788 |
|
| 789 |
/* Set the MAC address: */ |
| 790 |
memcpy(d->srom + TULIP_ROM_IEEE_NETWORK_ADDRESS, d->mac, 6); |
| 791 |
|
| 792 |
leaf = 30; |
| 793 |
d->srom[TULIP_ROM_CHIPn_DEVICE_NUMBER(0)] = 0; |
| 794 |
d->srom[TULIP_ROM_CHIPn_INFO_LEAF_OFFSET(0)] = leaf & 255; |
| 795 |
d->srom[TULIP_ROM_CHIPn_INFO_LEAF_OFFSET(0)+1] = leaf >> 8; |
| 796 |
|
| 797 |
d->srom[leaf+TULIP_ROM_IL_SELECT_CONN_TYPE] = 0; /* Not used? */ |
| 798 |
d->srom[leaf+TULIP_ROM_IL_MEDIA_COUNT] = 2; |
| 799 |
leaf += TULIP_ROM_IL_MEDIAn_BLOCK_BASE; |
| 800 |
|
| 801 |
d->srom[leaf] = 7; /* descriptor length */ |
| 802 |
d->srom[leaf+1] = TULIP_ROM_MB_21142_SIA; |
| 803 |
d->srom[leaf+2] = TULIP_ROM_MB_MEDIA_100TX; |
| 804 |
/* here comes 4 bytes of GPIO control/data settings */ |
| 805 |
leaf += d->srom[leaf]; |
| 806 |
|
| 807 |
d->srom[leaf] = 15; /* descriptor length */ |
| 808 |
d->srom[leaf+1] = TULIP_ROM_MB_21142_MII; |
| 809 |
d->srom[leaf+2] = 0; /* PHY nr */ |
| 810 |
d->srom[leaf+3] = 0; /* len of select sequence */ |
| 811 |
d->srom[leaf+4] = 0; /* len of reset sequence */ |
| 812 |
/* 5,6, 7,8, 9,10, 11,12, 13,14 = unused by GXemul */ |
| 813 |
leaf += d->srom[leaf]; |
| 814 |
|
| 815 |
/* MII PHY initial state: */ |
| 816 |
d->mii_state = MII_STATE_RESET; |
| 817 |
|
| 818 |
/* PHY #0: */ |
| 819 |
d->mii_phy_reg[MII_BMSR] = BMSR_100TXFDX | BMSR_10TFDX | |
| 820 |
BMSR_ACOMP | BMSR_ANEG | BMSR_LINK; |
| 821 |
} |
| 822 |
|
| 823 |
|
| 824 |
DEVICE_ACCESS(dec21143) |
| 825 |
{ |
| 826 |
struct dec21143_data *d = extra; |
| 827 |
uint64_t idata = 0, odata = 0; |
| 828 |
uint32_t oldreg = 0; |
| 829 |
int regnr = relative_addr >> 3; |
| 830 |
|
| 831 |
if (writeflag == MEM_WRITE) |
| 832 |
idata = memory_readmax64(cpu, data, len | d->pci_little_endian); |
| 833 |
|
| 834 |
if ((relative_addr & 7) == 0 && regnr < N_REGS) { |
| 835 |
if (writeflag == MEM_READ) { |
| 836 |
odata = d->reg[regnr]; |
| 837 |
} else { |
| 838 |
oldreg = d->reg[regnr]; |
| 839 |
switch (regnr) { |
| 840 |
case CSR_STATUS / 8: /* Zero-on-write */ |
| 841 |
d->reg[regnr] &= ~(idata & 0x0c01ffff); |
| 842 |
break; |
| 843 |
case CSR_MISSED / 8: /* Read only */ |
| 844 |
break; |
| 845 |
default:d->reg[regnr] = idata; |
| 846 |
} |
| 847 |
} |
| 848 |
} else |
| 849 |
fatal("[ dec21143: WARNING! unaligned access (0x%x) ]\n", |
| 850 |
(int)relative_addr); |
| 851 |
|
| 852 |
switch (relative_addr) { |
| 853 |
|
| 854 |
case CSR_BUSMODE: /* csr0 */ |
| 855 |
if (writeflag == MEM_WRITE) { |
| 856 |
/* Software reset takes effect immediately. */ |
| 857 |
if (idata & BUSMODE_SWR) { |
| 858 |
dec21143_reset(cpu, d); |
| 859 |
idata &= ~BUSMODE_SWR; |
| 860 |
} |
| 861 |
} |
| 862 |
break; |
| 863 |
|
| 864 |
case CSR_TXPOLL: /* csr1 */ |
| 865 |
if (writeflag == MEM_READ) |
| 866 |
fatal("[ dec21143: UNIMPLEMENTED READ from " |
| 867 |
"txpoll ]\n"); |
| 868 |
d->tx_idling = d->tx_idling_threshold; |
| 869 |
dev_dec21143_tick(cpu, extra); |
| 870 |
break; |
| 871 |
|
| 872 |
case CSR_RXPOLL: /* csr2 */ |
| 873 |
if (writeflag == MEM_READ) |
| 874 |
fatal("[ dec21143: UNIMPLEMENTED READ from " |
| 875 |
"rxpoll ]\n"); |
| 876 |
dev_dec21143_tick(cpu, extra); |
| 877 |
break; |
| 878 |
|
| 879 |
case CSR_RXLIST: /* csr3 */ |
| 880 |
if (writeflag == MEM_WRITE) { |
| 881 |
debug("[ dec21143: setting RXLIST to 0x%x ]\n", |
| 882 |
(int)idata); |
| 883 |
if (idata & 0x3) |
| 884 |
fatal("[ dec21143: WARNING! RXLIST not aligned" |
| 885 |
"? (0x%llx) ]\n", (long long)idata); |
| 886 |
idata &= ~0x3; |
| 887 |
d->cur_rx_addr = idata; |
| 888 |
} |
| 889 |
break; |
| 890 |
|
| 891 |
case CSR_TXLIST: /* csr4 */ |
| 892 |
if (writeflag == MEM_WRITE) { |
| 893 |
debug("[ dec21143: setting TXLIST to 0x%x ]\n", |
| 894 |
(int)idata); |
| 895 |
if (idata & 0x3) |
| 896 |
fatal("[ dec21143: WARNING! TXLIST not aligned" |
| 897 |
"? (0x%llx) ]\n", (long long)idata); |
| 898 |
idata &= ~0x3; |
| 899 |
d->cur_tx_addr = idata; |
| 900 |
} |
| 901 |
break; |
| 902 |
|
| 903 |
case CSR_STATUS: /* csr5 */ |
| 904 |
case CSR_INTEN: /* csr7 */ |
| 905 |
if (writeflag == MEM_WRITE) { |
| 906 |
/* Recalculate interrupt assertion. */ |
| 907 |
dev_dec21143_tick(cpu, extra); |
| 908 |
} |
| 909 |
break; |
| 910 |
|
| 911 |
case CSR_OPMODE: /* csr6: */ |
| 912 |
if (writeflag == MEM_WRITE) { |
| 913 |
if (idata & 0x02000000) { |
| 914 |
/* A must-be-one bit. */ |
| 915 |
idata &= ~0x02000000; |
| 916 |
} |
| 917 |
if (idata & OPMODE_ST) { |
| 918 |
idata &= ~OPMODE_ST; |
| 919 |
} else { |
| 920 |
/* Turned off TX? Then idle: */ |
| 921 |
d->reg[CSR_STATUS/8] |= STATUS_TPS; |
| 922 |
} |
| 923 |
if (idata & OPMODE_SR) { |
| 924 |
idata &= ~OPMODE_SR; |
| 925 |
} else { |
| 926 |
/* Turned off RX? Then go to stopped state: */ |
| 927 |
d->reg[CSR_STATUS/8] &= ~STATUS_RS; |
| 928 |
} |
| 929 |
idata &= ~(OPMODE_HBD | OPMODE_SCR | OPMODE_PCS |
| 930 |
| OPMODE_PS | OPMODE_SF | OPMODE_TTM | OPMODE_FD); |
| 931 |
if (idata & OPMODE_PNIC_IT) { |
| 932 |
idata &= ~OPMODE_PNIC_IT; |
| 933 |
d->tx_idling = d->tx_idling_threshold; |
| 934 |
} |
| 935 |
if (idata != 0) { |
| 936 |
fatal("[ dec21143: UNIMPLEMENTED OPMODE bits" |
| 937 |
": 0x%08x ]\n", (int)idata); |
| 938 |
} |
| 939 |
dev_dec21143_tick(cpu, extra); |
| 940 |
} |
| 941 |
break; |
| 942 |
|
| 943 |
case CSR_MISSED: /* csr8 */ |
| 944 |
break; |
| 945 |
|
| 946 |
case CSR_MIIROM: /* csr9 */ |
| 947 |
if (writeflag == MEM_WRITE) { |
| 948 |
if (idata & MIIROM_MDC) |
| 949 |
mii_access(cpu, d, oldreg, idata); |
| 950 |
else |
| 951 |
srom_access(cpu, d, oldreg, idata); |
| 952 |
} |
| 953 |
break; |
| 954 |
|
| 955 |
case CSR_SIASTAT: /* csr12 */ |
| 956 |
/* Auto-negotiation status = Good. */ |
| 957 |
odata = SIASTAT_ANS_FLPGOOD; |
| 958 |
break; |
| 959 |
|
| 960 |
case CSR_SIATXRX: /* csr14 */ |
| 961 |
/* Auto-negotiation Enabled */ |
| 962 |
odata = SIATXRX_ANE; |
| 963 |
break; |
| 964 |
|
| 965 |
case CSR_SIACONN: /* csr13 */ |
| 966 |
case CSR_SIAGEN: /* csr15 */ |
| 967 |
/* Don't print warnings for these, for now. */ |
| 968 |
break; |
| 969 |
|
| 970 |
default:if (writeflag == MEM_READ) |
| 971 |
fatal("[ dec21143: read from unimplemented 0x%02x ]\n", |
| 972 |
(int)relative_addr); |
| 973 |
else |
| 974 |
fatal("[ dec21143: write to unimplemented 0x%02x: " |
| 975 |
"0x%02x ]\n", (int)relative_addr, (int)idata); |
| 976 |
} |
| 977 |
|
| 978 |
if (writeflag == MEM_READ) |
| 979 |
memory_writemax64(cpu, data, len | d->pci_little_endian, odata); |
| 980 |
|
| 981 |
return 1; |
| 982 |
} |
| 983 |
|
| 984 |
|
| 985 |
DEVINIT(dec21143) |
| 986 |
{ |
| 987 |
struct dec21143_data *d; |
| 988 |
char name2[100]; |
| 989 |
|
| 990 |
d = malloc(sizeof(struct dec21143_data)); |
| 991 |
if (d == NULL) { |
| 992 |
fprintf(stderr, "out of memory\n"); |
| 993 |
exit(1); |
| 994 |
} |
| 995 |
memset(d, 0, sizeof(struct dec21143_data)); |
| 996 |
|
| 997 |
INTERRUPT_CONNECT(devinit->interrupt_path, d->irq); |
| 998 |
d->pci_little_endian = devinit->pci_little_endian; |
| 999 |
|
| 1000 |
net_generate_unique_mac(devinit->machine, d->mac); |
| 1001 |
net_add_nic(devinit->machine->emul->net, d, d->mac); |
| 1002 |
d->net = devinit->machine->emul->net; |
| 1003 |
|
| 1004 |
dec21143_reset(devinit->machine->cpus[0], d); |
| 1005 |
|
| 1006 |
snprintf(name2, sizeof(name2), "%s [%02x:%02x:%02x:%02x:%02x:%02x]", |
| 1007 |
devinit->name, d->mac[0], d->mac[1], d->mac[2], d->mac[3], |
| 1008 |
d->mac[4], d->mac[5]); |
| 1009 |
|
| 1010 |
memory_device_register(devinit->machine->memory, name2, |
| 1011 |
devinit->addr, 0x100, dev_dec21143_access, d, DM_DEFAULT, NULL); |
| 1012 |
|
| 1013 |
machine_add_tickfunction(devinit->machine, |
| 1014 |
dev_dec21143_tick, d, DEC21143_TICK_SHIFT, 0.0); |
| 1015 |
|
| 1016 |
/* |
| 1017 |
* NetBSD/cats uses memory accesses, OpenBSD/cats uses I/O registers. |
| 1018 |
* Let's make a mirror from the memory range to the I/O range: |
| 1019 |
*/ |
| 1020 |
dev_ram_init(devinit->machine, devinit->addr2, 0x100, DEV_RAM_MIRROR |
| 1021 |
| DEV_RAM_MIGHT_POINT_TO_DEVICES, devinit->addr); |
| 1022 |
|
| 1023 |
return 1; |
| 1024 |
} |
| 1025 |
|
Parent Directory
| 
Revision Log