1 /* 2 * OpenCores Ethernet MAC 10/100 + subset of 3 * National Semiconductors DP83848C 10/100 PHY 4 * 5 * http://opencores.org/svnget,ethmac?file=%2Ftrunk%2F%2Fdoc%2Feth_speci.pdf 6 * http://cache.national.com/ds/DP/DP83848C.pdf 7 * 8 * Copyright (c) 2011, Max Filippov, Open Source and Linux Lab. 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions are met: 13 * * Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * * Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * * Neither the name of the Open Source and Linux Lab nor the 19 * names of its contributors may be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 26 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 27 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 29 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 31 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include "hw/hw.h" 35 #include "hw/sysbus.h" 36 #include "net/net.h" 37 #include "sysemu/sysemu.h" 38 #include "trace.h" 39 40 /* RECSMALL is not used because it breaks tap networking in linux: 41 * incoming ARP responses are too short 42 */ 43 #undef USE_RECSMALL 44 45 #define GET_FIELD(v, field) (((v) & (field)) >> (field ## _LBN)) 46 #define GET_REGBIT(s, reg, field) ((s)->regs[reg] & (reg ## _ ## field)) 47 #define GET_REGFIELD(s, reg, field) \ 48 GET_FIELD((s)->regs[reg], reg ## _ ## field) 49 50 #define SET_FIELD(v, field, data) \ 51 ((v) = (((v) & ~(field)) | (((data) << (field ## _LBN)) & (field)))) 52 #define SET_REGFIELD(s, reg, field, data) \ 53 SET_FIELD((s)->regs[reg], reg ## _ ## field, data) 54 55 /* PHY MII registers */ 56 enum { 57 MII_BMCR, 58 MII_BMSR, 59 MII_PHYIDR1, 60 MII_PHYIDR2, 61 MII_ANAR, 62 MII_ANLPAR, 63 MII_REG_MAX = 16, 64 }; 65 66 typedef struct Mii { 67 uint16_t regs[MII_REG_MAX]; 68 bool link_ok; 69 } Mii; 70 71 static void mii_set_link(Mii *s, bool link_ok) 72 { 73 if (link_ok) { 74 s->regs[MII_BMSR] |= 0x4; 75 s->regs[MII_ANLPAR] |= 0x01e1; 76 } else { 77 s->regs[MII_BMSR] &= ~0x4; 78 s->regs[MII_ANLPAR] &= 0x01ff; 79 } 80 s->link_ok = link_ok; 81 } 82 83 static void mii_reset(Mii *s) 84 { 85 memset(s->regs, 0, sizeof(s->regs)); 86 s->regs[MII_BMCR] = 0x1000; 87 s->regs[MII_BMSR] = 0x7848; /* no ext regs */ 88 s->regs[MII_PHYIDR1] = 0x2000; 89 s->regs[MII_PHYIDR2] = 0x5c90; 90 s->regs[MII_ANAR] = 0x01e1; 91 mii_set_link(s, s->link_ok); 92 } 93 94 static void mii_ro(Mii *s, uint16_t v) 95 { 96 } 97 98 static void mii_write_bmcr(Mii *s, uint16_t v) 99 { 100 if (v & 0x8000) { 101 mii_reset(s); 102 } else { 103 s->regs[MII_BMCR] = v; 104 } 105 } 106 107 static void mii_write_host(Mii *s, unsigned idx, uint16_t v) 108 { 109 static void (*reg_write[MII_REG_MAX])(Mii *s, uint16_t v) = { 110 [MII_BMCR] = mii_write_bmcr, 111 [MII_BMSR] = mii_ro, 112 [MII_PHYIDR1] = mii_ro, 113 [MII_PHYIDR2] = mii_ro, 114 }; 115 116 if (idx < MII_REG_MAX) { 117 trace_open_eth_mii_write(idx, v); 118 if (reg_write[idx]) { 119 reg_write[idx](s, v); 120 } else { 121 s->regs[idx] = v; 122 } 123 } 124 } 125 126 static uint16_t mii_read_host(Mii *s, unsigned idx) 127 { 128 trace_open_eth_mii_read(idx, s->regs[idx]); 129 return s->regs[idx]; 130 } 131 132 /* OpenCores Ethernet registers */ 133 enum { 134 MODER, 135 INT_SOURCE, 136 INT_MASK, 137 IPGT, 138 IPGR1, 139 IPGR2, 140 PACKETLEN, 141 COLLCONF, 142 TX_BD_NUM, 143 CTRLMODER, 144 MIIMODER, 145 MIICOMMAND, 146 MIIADDRESS, 147 MIITX_DATA, 148 MIIRX_DATA, 149 MIISTATUS, 150 MAC_ADDR0, 151 MAC_ADDR1, 152 HASH0, 153 HASH1, 154 TXCTRL, 155 REG_MAX, 156 }; 157 158 enum { 159 MODER_RECSMALL = 0x10000, 160 MODER_PAD = 0x8000, 161 MODER_HUGEN = 0x4000, 162 MODER_RST = 0x800, 163 MODER_LOOPBCK = 0x80, 164 MODER_PRO = 0x20, 165 MODER_IAM = 0x10, 166 MODER_BRO = 0x8, 167 MODER_TXEN = 0x2, 168 MODER_RXEN = 0x1, 169 }; 170 171 enum { 172 INT_SOURCE_RXB = 0x4, 173 INT_SOURCE_TXB = 0x1, 174 }; 175 176 enum { 177 PACKETLEN_MINFL = 0xffff0000, 178 PACKETLEN_MINFL_LBN = 16, 179 PACKETLEN_MAXFL = 0xffff, 180 PACKETLEN_MAXFL_LBN = 0, 181 }; 182 183 enum { 184 MIICOMMAND_WCTRLDATA = 0x4, 185 MIICOMMAND_RSTAT = 0x2, 186 MIICOMMAND_SCANSTAT = 0x1, 187 }; 188 189 enum { 190 MIIADDRESS_RGAD = 0x1f00, 191 MIIADDRESS_RGAD_LBN = 8, 192 MIIADDRESS_FIAD = 0x1f, 193 MIIADDRESS_FIAD_LBN = 0, 194 }; 195 196 enum { 197 MIITX_DATA_CTRLDATA = 0xffff, 198 MIITX_DATA_CTRLDATA_LBN = 0, 199 }; 200 201 enum { 202 MIIRX_DATA_PRSD = 0xffff, 203 MIIRX_DATA_PRSD_LBN = 0, 204 }; 205 206 enum { 207 MIISTATUS_LINKFAIL = 0x1, 208 MIISTATUS_LINKFAIL_LBN = 0, 209 }; 210 211 enum { 212 MAC_ADDR0_BYTE2 = 0xff000000, 213 MAC_ADDR0_BYTE2_LBN = 24, 214 MAC_ADDR0_BYTE3 = 0xff0000, 215 MAC_ADDR0_BYTE3_LBN = 16, 216 MAC_ADDR0_BYTE4 = 0xff00, 217 MAC_ADDR0_BYTE4_LBN = 8, 218 MAC_ADDR0_BYTE5 = 0xff, 219 MAC_ADDR0_BYTE5_LBN = 0, 220 }; 221 222 enum { 223 MAC_ADDR1_BYTE0 = 0xff00, 224 MAC_ADDR1_BYTE0_LBN = 8, 225 MAC_ADDR1_BYTE1 = 0xff, 226 MAC_ADDR1_BYTE1_LBN = 0, 227 }; 228 229 enum { 230 TXD_LEN = 0xffff0000, 231 TXD_LEN_LBN = 16, 232 TXD_RD = 0x8000, 233 TXD_IRQ = 0x4000, 234 TXD_WR = 0x2000, 235 TXD_PAD = 0x1000, 236 TXD_CRC = 0x800, 237 TXD_UR = 0x100, 238 TXD_RTRY = 0xf0, 239 TXD_RTRY_LBN = 4, 240 TXD_RL = 0x8, 241 TXD_LC = 0x4, 242 TXD_DF = 0x2, 243 TXD_CS = 0x1, 244 }; 245 246 enum { 247 RXD_LEN = 0xffff0000, 248 RXD_LEN_LBN = 16, 249 RXD_E = 0x8000, 250 RXD_IRQ = 0x4000, 251 RXD_WRAP = 0x2000, 252 RXD_CF = 0x100, 253 RXD_M = 0x80, 254 RXD_OR = 0x40, 255 RXD_IS = 0x20, 256 RXD_DN = 0x10, 257 RXD_TL = 0x8, 258 RXD_SF = 0x4, 259 RXD_CRC = 0x2, 260 RXD_LC = 0x1, 261 }; 262 263 typedef struct desc { 264 uint32_t len_flags; 265 uint32_t buf_ptr; 266 } desc; 267 268 #define DEFAULT_PHY 1 269 270 typedef struct OpenEthState { 271 SysBusDevice dev; 272 NICState *nic; 273 NICConf conf; 274 MemoryRegion reg_io; 275 MemoryRegion desc_io; 276 qemu_irq irq; 277 278 Mii mii; 279 uint32_t regs[REG_MAX]; 280 unsigned tx_desc; 281 unsigned rx_desc; 282 desc desc[128]; 283 } OpenEthState; 284 285 static desc *rx_desc(OpenEthState *s) 286 { 287 return s->desc + s->rx_desc; 288 } 289 290 static desc *tx_desc(OpenEthState *s) 291 { 292 return s->desc + s->tx_desc; 293 } 294 295 static void open_eth_update_irq(OpenEthState *s, 296 uint32_t old, uint32_t new) 297 { 298 if (!old != !new) { 299 trace_open_eth_update_irq(new); 300 qemu_set_irq(s->irq, new); 301 } 302 } 303 304 static void open_eth_int_source_write(OpenEthState *s, 305 uint32_t val) 306 { 307 uint32_t old_val = s->regs[INT_SOURCE]; 308 309 s->regs[INT_SOURCE] = val; 310 open_eth_update_irq(s, old_val & s->regs[INT_MASK], 311 s->regs[INT_SOURCE] & s->regs[INT_MASK]); 312 } 313 314 static void open_eth_set_link_status(NetClientState *nc) 315 { 316 OpenEthState *s = qemu_get_nic_opaque(nc); 317 318 if (GET_REGBIT(s, MIICOMMAND, SCANSTAT)) { 319 SET_REGFIELD(s, MIISTATUS, LINKFAIL, nc->link_down); 320 } 321 mii_set_link(&s->mii, !nc->link_down); 322 } 323 324 static void open_eth_reset(void *opaque) 325 { 326 OpenEthState *s = opaque; 327 328 memset(s->regs, 0, sizeof(s->regs)); 329 s->regs[MODER] = 0xa000; 330 s->regs[IPGT] = 0x12; 331 s->regs[IPGR1] = 0xc; 332 s->regs[IPGR2] = 0x12; 333 s->regs[PACKETLEN] = 0x400600; 334 s->regs[COLLCONF] = 0xf003f; 335 s->regs[TX_BD_NUM] = 0x40; 336 s->regs[MIIMODER] = 0x64; 337 338 s->tx_desc = 0; 339 s->rx_desc = 0x40; 340 341 mii_reset(&s->mii); 342 open_eth_set_link_status(qemu_get_queue(s->nic)); 343 } 344 345 static int open_eth_can_receive(NetClientState *nc) 346 { 347 OpenEthState *s = qemu_get_nic_opaque(nc); 348 349 return GET_REGBIT(s, MODER, RXEN) && 350 (s->regs[TX_BD_NUM] < 0x80) && 351 (rx_desc(s)->len_flags & RXD_E); 352 } 353 354 static ssize_t open_eth_receive(NetClientState *nc, 355 const uint8_t *buf, size_t size) 356 { 357 OpenEthState *s = qemu_get_nic_opaque(nc); 358 size_t maxfl = GET_REGFIELD(s, PACKETLEN, MAXFL); 359 size_t minfl = GET_REGFIELD(s, PACKETLEN, MINFL); 360 size_t fcsl = 4; 361 bool miss = true; 362 363 trace_open_eth_receive((unsigned)size); 364 365 if (size >= 6) { 366 static const uint8_t bcast_addr[] = { 367 0xff, 0xff, 0xff, 0xff, 0xff, 0xff 368 }; 369 if (memcmp(buf, bcast_addr, sizeof(bcast_addr)) == 0) { 370 miss = GET_REGBIT(s, MODER, BRO); 371 } else if ((buf[0] & 0x1) || GET_REGBIT(s, MODER, IAM)) { 372 unsigned mcast_idx = compute_mcast_idx(buf); 373 miss = !(s->regs[HASH0 + mcast_idx / 32] & 374 (1 << (mcast_idx % 32))); 375 trace_open_eth_receive_mcast( 376 mcast_idx, s->regs[HASH0], s->regs[HASH1]); 377 } else { 378 miss = GET_REGFIELD(s, MAC_ADDR1, BYTE0) != buf[0] || 379 GET_REGFIELD(s, MAC_ADDR1, BYTE1) != buf[1] || 380 GET_REGFIELD(s, MAC_ADDR0, BYTE2) != buf[2] || 381 GET_REGFIELD(s, MAC_ADDR0, BYTE3) != buf[3] || 382 GET_REGFIELD(s, MAC_ADDR0, BYTE4) != buf[4] || 383 GET_REGFIELD(s, MAC_ADDR0, BYTE5) != buf[5]; 384 } 385 } 386 387 if (miss && !GET_REGBIT(s, MODER, PRO)) { 388 trace_open_eth_receive_reject(); 389 return size; 390 } 391 392 #ifdef USE_RECSMALL 393 if (GET_REGBIT(s, MODER, RECSMALL) || size >= minfl) { 394 #else 395 { 396 #endif 397 static const uint8_t zero[64] = {0}; 398 desc *desc = rx_desc(s); 399 size_t copy_size = GET_REGBIT(s, MODER, HUGEN) ? 65536 : maxfl; 400 401 desc->len_flags &= ~(RXD_CF | RXD_M | RXD_OR | 402 RXD_IS | RXD_DN | RXD_TL | RXD_SF | RXD_CRC | RXD_LC); 403 404 if (copy_size > size) { 405 copy_size = size; 406 } else { 407 fcsl = 0; 408 } 409 if (miss) { 410 desc->len_flags |= RXD_M; 411 } 412 if (GET_REGBIT(s, MODER, HUGEN) && size > maxfl) { 413 desc->len_flags |= RXD_TL; 414 } 415 #ifdef USE_RECSMALL 416 if (size < minfl) { 417 desc->len_flags |= RXD_SF; 418 } 419 #endif 420 421 cpu_physical_memory_write(desc->buf_ptr, buf, copy_size); 422 423 if (GET_REGBIT(s, MODER, PAD) && copy_size < minfl) { 424 if (minfl - copy_size > fcsl) { 425 fcsl = 0; 426 } else { 427 fcsl -= minfl - copy_size; 428 } 429 while (copy_size < minfl) { 430 size_t zero_sz = minfl - copy_size < sizeof(zero) ? 431 minfl - copy_size : sizeof(zero); 432 433 cpu_physical_memory_write(desc->buf_ptr + copy_size, 434 zero, zero_sz); 435 copy_size += zero_sz; 436 } 437 } 438 439 /* There's no FCS in the frames handed to us by the QEMU, zero fill it. 440 * Don't do it if the frame is cut at the MAXFL or padded with 4 or 441 * more bytes to the MINFL. 442 */ 443 cpu_physical_memory_write(desc->buf_ptr + copy_size, zero, fcsl); 444 copy_size += fcsl; 445 446 SET_FIELD(desc->len_flags, RXD_LEN, copy_size); 447 448 if ((desc->len_flags & RXD_WRAP) || s->rx_desc == 0x7f) { 449 s->rx_desc = s->regs[TX_BD_NUM]; 450 } else { 451 ++s->rx_desc; 452 } 453 desc->len_flags &= ~RXD_E; 454 455 trace_open_eth_receive_desc(desc->buf_ptr, desc->len_flags); 456 457 if (desc->len_flags & RXD_IRQ) { 458 open_eth_int_source_write(s, 459 s->regs[INT_SOURCE] | INT_SOURCE_RXB); 460 } 461 } 462 return size; 463 } 464 465 static void open_eth_cleanup(NetClientState *nc) 466 { 467 } 468 469 static NetClientInfo net_open_eth_info = { 470 .type = NET_CLIENT_OPTIONS_KIND_NIC, 471 .size = sizeof(NICState), 472 .can_receive = open_eth_can_receive, 473 .receive = open_eth_receive, 474 .cleanup = open_eth_cleanup, 475 .link_status_changed = open_eth_set_link_status, 476 }; 477 478 static void open_eth_start_xmit(OpenEthState *s, desc *tx) 479 { 480 uint8_t buf[65536]; 481 unsigned len = GET_FIELD(tx->len_flags, TXD_LEN); 482 unsigned tx_len = len; 483 484 if ((tx->len_flags & TXD_PAD) && 485 tx_len < GET_REGFIELD(s, PACKETLEN, MINFL)) { 486 tx_len = GET_REGFIELD(s, PACKETLEN, MINFL); 487 } 488 if (!GET_REGBIT(s, MODER, HUGEN) && 489 tx_len > GET_REGFIELD(s, PACKETLEN, MAXFL)) { 490 tx_len = GET_REGFIELD(s, PACKETLEN, MAXFL); 491 } 492 493 trace_open_eth_start_xmit(tx->buf_ptr, len, tx_len); 494 495 if (len > tx_len) { 496 len = tx_len; 497 } 498 cpu_physical_memory_read(tx->buf_ptr, buf, len); 499 if (tx_len > len) { 500 memset(buf + len, 0, tx_len - len); 501 } 502 qemu_send_packet(qemu_get_queue(s->nic), buf, tx_len); 503 504 if (tx->len_flags & TXD_WR) { 505 s->tx_desc = 0; 506 } else { 507 ++s->tx_desc; 508 if (s->tx_desc >= s->regs[TX_BD_NUM]) { 509 s->tx_desc = 0; 510 } 511 } 512 tx->len_flags &= ~(TXD_RD | TXD_UR | 513 TXD_RTRY | TXD_RL | TXD_LC | TXD_DF | TXD_CS); 514 if (tx->len_flags & TXD_IRQ) { 515 open_eth_int_source_write(s, s->regs[INT_SOURCE] | INT_SOURCE_TXB); 516 } 517 518 } 519 520 static void open_eth_check_start_xmit(OpenEthState *s) 521 { 522 desc *tx = tx_desc(s); 523 if (GET_REGBIT(s, MODER, TXEN) && s->regs[TX_BD_NUM] > 0 && 524 (tx->len_flags & TXD_RD) && 525 GET_FIELD(tx->len_flags, TXD_LEN) > 4) { 526 open_eth_start_xmit(s, tx); 527 } 528 } 529 530 static uint64_t open_eth_reg_read(void *opaque, 531 hwaddr addr, unsigned int size) 532 { 533 static uint32_t (*reg_read[REG_MAX])(OpenEthState *s) = { 534 }; 535 OpenEthState *s = opaque; 536 unsigned idx = addr / 4; 537 uint64_t v = 0; 538 539 if (idx < REG_MAX) { 540 if (reg_read[idx]) { 541 v = reg_read[idx](s); 542 } else { 543 v = s->regs[idx]; 544 } 545 } 546 trace_open_eth_reg_read((uint32_t)addr, (uint32_t)v); 547 return v; 548 } 549 550 static void open_eth_ro(OpenEthState *s, uint32_t val) 551 { 552 } 553 554 static void open_eth_moder_host_write(OpenEthState *s, uint32_t val) 555 { 556 uint32_t set = val & ~s->regs[MODER]; 557 558 if (set & MODER_RST) { 559 open_eth_reset(s); 560 } 561 562 s->regs[MODER] = val; 563 564 if (set & MODER_RXEN) { 565 s->rx_desc = s->regs[TX_BD_NUM]; 566 } 567 if (set & MODER_TXEN) { 568 s->tx_desc = 0; 569 open_eth_check_start_xmit(s); 570 } 571 } 572 573 static void open_eth_int_source_host_write(OpenEthState *s, uint32_t val) 574 { 575 uint32_t old = s->regs[INT_SOURCE]; 576 577 s->regs[INT_SOURCE] &= ~val; 578 open_eth_update_irq(s, old & s->regs[INT_MASK], 579 s->regs[INT_SOURCE] & s->regs[INT_MASK]); 580 } 581 582 static void open_eth_int_mask_host_write(OpenEthState *s, uint32_t val) 583 { 584 uint32_t old = s->regs[INT_MASK]; 585 586 s->regs[INT_MASK] = val; 587 open_eth_update_irq(s, s->regs[INT_SOURCE] & old, 588 s->regs[INT_SOURCE] & s->regs[INT_MASK]); 589 } 590 591 static void open_eth_mii_command_host_write(OpenEthState *s, uint32_t val) 592 { 593 unsigned fiad = GET_REGFIELD(s, MIIADDRESS, FIAD); 594 unsigned rgad = GET_REGFIELD(s, MIIADDRESS, RGAD); 595 596 if (val & MIICOMMAND_WCTRLDATA) { 597 if (fiad == DEFAULT_PHY) { 598 mii_write_host(&s->mii, rgad, 599 GET_REGFIELD(s, MIITX_DATA, CTRLDATA)); 600 } 601 } 602 if (val & MIICOMMAND_RSTAT) { 603 if (fiad == DEFAULT_PHY) { 604 SET_REGFIELD(s, MIIRX_DATA, PRSD, 605 mii_read_host(&s->mii, rgad)); 606 } else { 607 s->regs[MIIRX_DATA] = 0xffff; 608 } 609 SET_REGFIELD(s, MIISTATUS, LINKFAIL, qemu_get_queue(s->nic)->link_down); 610 } 611 } 612 613 static void open_eth_mii_tx_host_write(OpenEthState *s, uint32_t val) 614 { 615 SET_REGFIELD(s, MIITX_DATA, CTRLDATA, val); 616 if (GET_REGFIELD(s, MIIADDRESS, FIAD) == DEFAULT_PHY) { 617 mii_write_host(&s->mii, GET_REGFIELD(s, MIIADDRESS, RGAD), 618 GET_REGFIELD(s, MIITX_DATA, CTRLDATA)); 619 } 620 } 621 622 static void open_eth_reg_write(void *opaque, 623 hwaddr addr, uint64_t val, unsigned int size) 624 { 625 static void (*reg_write[REG_MAX])(OpenEthState *s, uint32_t val) = { 626 [MODER] = open_eth_moder_host_write, 627 [INT_SOURCE] = open_eth_int_source_host_write, 628 [INT_MASK] = open_eth_int_mask_host_write, 629 [MIICOMMAND] = open_eth_mii_command_host_write, 630 [MIITX_DATA] = open_eth_mii_tx_host_write, 631 [MIISTATUS] = open_eth_ro, 632 }; 633 OpenEthState *s = opaque; 634 unsigned idx = addr / 4; 635 636 if (idx < REG_MAX) { 637 trace_open_eth_reg_write((uint32_t)addr, (uint32_t)val); 638 if (reg_write[idx]) { 639 reg_write[idx](s, val); 640 } else { 641 s->regs[idx] = val; 642 } 643 } 644 } 645 646 static uint64_t open_eth_desc_read(void *opaque, 647 hwaddr addr, unsigned int size) 648 { 649 OpenEthState *s = opaque; 650 uint64_t v = 0; 651 652 addr &= 0x3ff; 653 memcpy(&v, (uint8_t *)s->desc + addr, size); 654 trace_open_eth_desc_read((uint32_t)addr, (uint32_t)v); 655 return v; 656 } 657 658 static void open_eth_desc_write(void *opaque, 659 hwaddr addr, uint64_t val, unsigned int size) 660 { 661 OpenEthState *s = opaque; 662 663 addr &= 0x3ff; 664 trace_open_eth_desc_write((uint32_t)addr, (uint32_t)val); 665 memcpy((uint8_t *)s->desc + addr, &val, size); 666 open_eth_check_start_xmit(s); 667 } 668 669 670 static const MemoryRegionOps open_eth_reg_ops = { 671 .read = open_eth_reg_read, 672 .write = open_eth_reg_write, 673 }; 674 675 static const MemoryRegionOps open_eth_desc_ops = { 676 .read = open_eth_desc_read, 677 .write = open_eth_desc_write, 678 }; 679 680 static int sysbus_open_eth_init(SysBusDevice *dev) 681 { 682 OpenEthState *s = DO_UPCAST(OpenEthState, dev, dev); 683 684 memory_region_init_io(&s->reg_io, &open_eth_reg_ops, s, 685 "open_eth.regs", 0x54); 686 sysbus_init_mmio(dev, &s->reg_io); 687 688 memory_region_init_io(&s->desc_io, &open_eth_desc_ops, s, 689 "open_eth.desc", 0x400); 690 sysbus_init_mmio(dev, &s->desc_io); 691 692 sysbus_init_irq(dev, &s->irq); 693 694 s->nic = qemu_new_nic(&net_open_eth_info, &s->conf, 695 object_get_typename(OBJECT(s)), s->dev.qdev.id, s); 696 return 0; 697 } 698 699 static void qdev_open_eth_reset(DeviceState *dev) 700 { 701 OpenEthState *d = DO_UPCAST(OpenEthState, dev.qdev, dev); 702 open_eth_reset(d); 703 } 704 705 static Property open_eth_properties[] = { 706 DEFINE_NIC_PROPERTIES(OpenEthState, conf), 707 DEFINE_PROP_END_OF_LIST(), 708 }; 709 710 static void open_eth_class_init(ObjectClass *klass, void *data) 711 { 712 DeviceClass *dc = DEVICE_CLASS(klass); 713 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); 714 715 k->init = sysbus_open_eth_init; 716 dc->desc = "Opencores 10/100 Mbit Ethernet"; 717 dc->reset = qdev_open_eth_reset; 718 dc->props = open_eth_properties; 719 } 720 721 static const TypeInfo open_eth_info = { 722 .name = "open_eth", 723 .parent = TYPE_SYS_BUS_DEVICE, 724 .instance_size = sizeof(OpenEthState), 725 .class_init = open_eth_class_init, 726 }; 727 728 static void open_eth_register_types(void) 729 { 730 type_register_static(&open_eth_info); 731 } 732 733 type_init(open_eth_register_types) 734