1 /* 2 * QEMU NE2000 emulation 3 * 4 * Copyright (c) 2003-2004 Fabrice Bellard 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 25 #include "qemu/osdep.h" 26 #include "net/eth.h" 27 #include "qemu/module.h" 28 #include "exec/memory.h" 29 #include "hw/irq.h" 30 #include "migration/vmstate.h" 31 #include "ne2000.h" 32 #include "trace.h" 33 34 /* debug NE2000 card */ 35 //#define DEBUG_NE2000 36 37 #define MAX_ETH_FRAME_SIZE 1514 38 39 #define E8390_CMD 0x00 /* The command register (for all pages) */ 40 /* Page 0 register offsets. */ 41 #define EN0_CLDALO 0x01 /* Low byte of current local dma addr RD */ 42 #define EN0_STARTPG 0x01 /* Starting page of ring bfr WR */ 43 #define EN0_CLDAHI 0x02 /* High byte of current local dma addr RD */ 44 #define EN0_STOPPG 0x02 /* Ending page +1 of ring bfr WR */ 45 #define EN0_BOUNDARY 0x03 /* Boundary page of ring bfr RD WR */ 46 #define EN0_TSR 0x04 /* Transmit status reg RD */ 47 #define EN0_TPSR 0x04 /* Transmit starting page WR */ 48 #define EN0_NCR 0x05 /* Number of collision reg RD */ 49 #define EN0_TCNTLO 0x05 /* Low byte of tx byte count WR */ 50 #define EN0_FIFO 0x06 /* FIFO RD */ 51 #define EN0_TCNTHI 0x06 /* High byte of tx byte count WR */ 52 #define EN0_ISR 0x07 /* Interrupt status reg RD WR */ 53 #define EN0_CRDALO 0x08 /* low byte of current remote dma address RD */ 54 #define EN0_RSARLO 0x08 /* Remote start address reg 0 */ 55 #define EN0_CRDAHI 0x09 /* high byte, current remote dma address RD */ 56 #define EN0_RSARHI 0x09 /* Remote start address reg 1 */ 57 #define EN0_RCNTLO 0x0a /* Remote byte count reg WR */ 58 #define EN0_RTL8029ID0 0x0a /* Realtek ID byte #1 RD */ 59 #define EN0_RCNTHI 0x0b /* Remote byte count reg WR */ 60 #define EN0_RTL8029ID1 0x0b /* Realtek ID byte #2 RD */ 61 #define EN0_RSR 0x0c /* rx status reg RD */ 62 #define EN0_RXCR 0x0c /* RX configuration reg WR */ 63 #define EN0_TXCR 0x0d /* TX configuration reg WR */ 64 #define EN0_COUNTER0 0x0d /* Rcv alignment error counter RD */ 65 #define EN0_DCFG 0x0e /* Data configuration reg WR */ 66 #define EN0_COUNTER1 0x0e /* Rcv CRC error counter RD */ 67 #define EN0_IMR 0x0f /* Interrupt mask reg WR */ 68 #define EN0_COUNTER2 0x0f /* Rcv missed frame error counter RD */ 69 70 #define EN1_PHYS 0x11 71 #define EN1_CURPAG 0x17 72 #define EN1_MULT 0x18 73 74 #define EN2_STARTPG 0x21 /* Starting page of ring bfr RD */ 75 #define EN2_STOPPG 0x22 /* Ending page +1 of ring bfr RD */ 76 77 #define EN3_CONFIG0 0x33 78 #define EN3_CONFIG1 0x34 79 #define EN3_CONFIG2 0x35 80 #define EN3_CONFIG3 0x36 81 82 /* Register accessed at EN_CMD, the 8390 base addr. */ 83 #define E8390_STOP 0x01 /* Stop and reset the chip */ 84 #define E8390_START 0x02 /* Start the chip, clear reset */ 85 #define E8390_TRANS 0x04 /* Transmit a frame */ 86 #define E8390_RREAD 0x08 /* Remote read */ 87 #define E8390_RWRITE 0x10 /* Remote write */ 88 #define E8390_NODMA 0x20 /* Remote DMA */ 89 #define E8390_PAGE0 0x00 /* Select page chip registers */ 90 #define E8390_PAGE1 0x40 /* using the two high-order bits */ 91 #define E8390_PAGE2 0x80 /* Page 3 is invalid. */ 92 93 /* Bits in EN0_ISR - Interrupt status register */ 94 #define ENISR_RX 0x01 /* Receiver, no error */ 95 #define ENISR_TX 0x02 /* Transmitter, no error */ 96 #define ENISR_RX_ERR 0x04 /* Receiver, with error */ 97 #define ENISR_TX_ERR 0x08 /* Transmitter, with error */ 98 #define ENISR_OVER 0x10 /* Receiver overwrote the ring */ 99 #define ENISR_COUNTERS 0x20 /* Counters need emptying */ 100 #define ENISR_RDC 0x40 /* remote dma complete */ 101 #define ENISR_RESET 0x80 /* Reset completed */ 102 #define ENISR_ALL 0x3f /* Interrupts we will enable */ 103 104 /* Bits in received packet status byte and EN0_RSR*/ 105 #define ENRSR_RXOK 0x01 /* Received a good packet */ 106 #define ENRSR_CRC 0x02 /* CRC error */ 107 #define ENRSR_FAE 0x04 /* frame alignment error */ 108 #define ENRSR_FO 0x08 /* FIFO overrun */ 109 #define ENRSR_MPA 0x10 /* missed pkt */ 110 #define ENRSR_PHY 0x20 /* physical/multicast address */ 111 #define ENRSR_DIS 0x40 /* receiver disable. set in monitor mode */ 112 #define ENRSR_DEF 0x80 /* deferring */ 113 114 /* Transmitted packet status, EN0_TSR. */ 115 #define ENTSR_PTX 0x01 /* Packet transmitted without error */ 116 #define ENTSR_ND 0x02 /* The transmit wasn't deferred. */ 117 #define ENTSR_COL 0x04 /* The transmit collided at least once. */ 118 #define ENTSR_ABT 0x08 /* The transmit collided 16 times, and was deferred. */ 119 #define ENTSR_CRS 0x10 /* The carrier sense was lost. */ 120 #define ENTSR_FU 0x20 /* A "FIFO underrun" occurred during transmit. */ 121 #define ENTSR_CDH 0x40 /* The collision detect "heartbeat" signal was lost. */ 122 #define ENTSR_OWC 0x80 /* There was an out-of-window collision. */ 123 124 void ne2000_reset(NE2000State *s) 125 { 126 int i; 127 128 s->isr = ENISR_RESET; 129 memcpy(s->mem, &s->c.macaddr, 6); 130 s->mem[14] = 0x57; 131 s->mem[15] = 0x57; 132 133 /* duplicate prom data */ 134 for(i = 15;i >= 0; i--) { 135 s->mem[2 * i] = s->mem[i]; 136 s->mem[2 * i + 1] = s->mem[i]; 137 } 138 } 139 140 static void ne2000_update_irq(NE2000State *s) 141 { 142 int isr; 143 isr = (s->isr & s->imr) & 0x7f; 144 #if defined(DEBUG_NE2000) 145 printf("NE2000: Set IRQ to %d (%02x %02x)\n", 146 isr ? 1 : 0, s->isr, s->imr); 147 #endif 148 qemu_set_irq(s->irq, (isr != 0)); 149 } 150 151 static int ne2000_buffer_full(NE2000State *s) 152 { 153 int avail, index, boundary; 154 155 if (s->stop <= s->start) { 156 return 1; 157 } 158 159 index = s->curpag << 8; 160 boundary = s->boundary << 8; 161 if (index < boundary) 162 avail = boundary - index; 163 else 164 avail = (s->stop - s->start) - (index - boundary); 165 if (avail < (MAX_ETH_FRAME_SIZE + 4)) 166 return 1; 167 return 0; 168 } 169 170 ssize_t ne2000_receive(NetClientState *nc, const uint8_t *buf, size_t size_) 171 { 172 NE2000State *s = qemu_get_nic_opaque(nc); 173 size_t size = size_; 174 uint8_t *p; 175 unsigned int total_len, next, avail, len, index, mcast_idx; 176 static const uint8_t broadcast_macaddr[6] = 177 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 178 179 #if defined(DEBUG_NE2000) 180 printf("NE2000: received len=%zu\n", size); 181 #endif 182 183 if (s->cmd & E8390_STOP || ne2000_buffer_full(s)) 184 return -1; 185 186 /* XXX: check this */ 187 if (s->rxcr & 0x10) { 188 /* promiscuous: receive all */ 189 } else { 190 if (!memcmp(buf, broadcast_macaddr, 6)) { 191 /* broadcast address */ 192 if (!(s->rxcr & 0x04)) 193 return size; 194 } else if (buf[0] & 0x01) { 195 /* multicast */ 196 if (!(s->rxcr & 0x08)) 197 return size; 198 mcast_idx = net_crc32(buf, ETH_ALEN) >> 26; 199 if (!(s->mult[mcast_idx >> 3] & (1 << (mcast_idx & 7)))) 200 return size; 201 } else if (s->mem[0] == buf[0] && 202 s->mem[2] == buf[1] && 203 s->mem[4] == buf[2] && 204 s->mem[6] == buf[3] && 205 s->mem[8] == buf[4] && 206 s->mem[10] == buf[5]) { 207 /* match */ 208 } else { 209 return size; 210 } 211 } 212 213 index = s->curpag << 8; 214 if (index >= NE2000_PMEM_END) { 215 index = s->start; 216 } 217 /* 4 bytes for header */ 218 total_len = size + 4; 219 /* address for next packet (4 bytes for CRC) */ 220 next = index + ((total_len + 4 + 255) & ~0xff); 221 if (next >= s->stop) 222 next -= (s->stop - s->start); 223 /* prepare packet header */ 224 p = s->mem + index; 225 s->rsr = ENRSR_RXOK; /* receive status */ 226 /* XXX: check this */ 227 if (buf[0] & 0x01) 228 s->rsr |= ENRSR_PHY; 229 p[0] = s->rsr; 230 p[1] = next >> 8; 231 p[2] = total_len; 232 p[3] = total_len >> 8; 233 index += 4; 234 235 /* write packet data */ 236 while (size > 0) { 237 if (index <= s->stop) 238 avail = s->stop - index; 239 else 240 break; 241 len = size; 242 if (len > avail) 243 len = avail; 244 memcpy(s->mem + index, buf, len); 245 buf += len; 246 index += len; 247 if (index == s->stop) 248 index = s->start; 249 size -= len; 250 } 251 s->curpag = next >> 8; 252 253 /* now we can signal we have received something */ 254 s->isr |= ENISR_RX; 255 ne2000_update_irq(s); 256 257 return size_; 258 } 259 260 static void ne2000_ioport_write(void *opaque, uint32_t addr, uint32_t val) 261 { 262 NE2000State *s = opaque; 263 int offset, page, index; 264 265 addr &= 0xf; 266 trace_ne2000_ioport_write(addr, val); 267 if (addr == E8390_CMD) { 268 /* control register */ 269 s->cmd = val; 270 if (!(val & E8390_STOP)) { /* START bit makes no sense on RTL8029... */ 271 s->isr &= ~ENISR_RESET; 272 /* test specific case: zero length transfer */ 273 if ((val & (E8390_RREAD | E8390_RWRITE)) && 274 s->rcnt == 0) { 275 s->isr |= ENISR_RDC; 276 ne2000_update_irq(s); 277 } 278 if (val & E8390_TRANS) { 279 index = (s->tpsr << 8); 280 /* XXX: next 2 lines are a hack to make netware 3.11 work */ 281 if (index >= NE2000_PMEM_END) 282 index -= NE2000_PMEM_SIZE; 283 /* fail safe: check range on the transmitted length */ 284 if (index + s->tcnt <= NE2000_PMEM_END) { 285 qemu_send_packet(qemu_get_queue(s->nic), s->mem + index, 286 s->tcnt); 287 } 288 /* signal end of transfer */ 289 s->tsr = ENTSR_PTX; 290 s->isr |= ENISR_TX; 291 s->cmd &= ~E8390_TRANS; 292 ne2000_update_irq(s); 293 } 294 } 295 } else { 296 page = s->cmd >> 6; 297 offset = addr | (page << 4); 298 switch(offset) { 299 case EN0_STARTPG: 300 if (val << 8 <= NE2000_PMEM_END) { 301 s->start = val << 8; 302 } 303 break; 304 case EN0_STOPPG: 305 if (val << 8 <= NE2000_PMEM_END) { 306 s->stop = val << 8; 307 } 308 break; 309 case EN0_BOUNDARY: 310 if (val << 8 < NE2000_PMEM_END) { 311 s->boundary = val; 312 } 313 break; 314 case EN0_IMR: 315 s->imr = val; 316 ne2000_update_irq(s); 317 break; 318 case EN0_TPSR: 319 s->tpsr = val; 320 break; 321 case EN0_TCNTLO: 322 s->tcnt = (s->tcnt & 0xff00) | val; 323 break; 324 case EN0_TCNTHI: 325 s->tcnt = (s->tcnt & 0x00ff) | (val << 8); 326 break; 327 case EN0_RSARLO: 328 s->rsar = (s->rsar & 0xff00) | val; 329 break; 330 case EN0_RSARHI: 331 s->rsar = (s->rsar & 0x00ff) | (val << 8); 332 break; 333 case EN0_RCNTLO: 334 s->rcnt = (s->rcnt & 0xff00) | val; 335 break; 336 case EN0_RCNTHI: 337 s->rcnt = (s->rcnt & 0x00ff) | (val << 8); 338 break; 339 case EN0_RXCR: 340 s->rxcr = val; 341 break; 342 case EN0_DCFG: 343 s->dcfg = val; 344 break; 345 case EN0_ISR: 346 s->isr &= ~(val & 0x7f); 347 ne2000_update_irq(s); 348 break; 349 case EN1_PHYS ... EN1_PHYS + 5: 350 s->phys[offset - EN1_PHYS] = val; 351 break; 352 case EN1_CURPAG: 353 if (val << 8 < NE2000_PMEM_END) { 354 s->curpag = val; 355 } 356 break; 357 case EN1_MULT ... EN1_MULT + 7: 358 s->mult[offset - EN1_MULT] = val; 359 break; 360 } 361 } 362 } 363 364 static uint32_t ne2000_ioport_read(void *opaque, uint32_t addr) 365 { 366 NE2000State *s = opaque; 367 int offset, page, ret; 368 369 addr &= 0xf; 370 if (addr == E8390_CMD) { 371 ret = s->cmd; 372 } else { 373 page = s->cmd >> 6; 374 offset = addr | (page << 4); 375 switch(offset) { 376 case EN0_TSR: 377 ret = s->tsr; 378 break; 379 case EN0_BOUNDARY: 380 ret = s->boundary; 381 break; 382 case EN0_ISR: 383 ret = s->isr; 384 break; 385 case EN0_RSARLO: 386 ret = s->rsar & 0x00ff; 387 break; 388 case EN0_RSARHI: 389 ret = s->rsar >> 8; 390 break; 391 case EN1_PHYS ... EN1_PHYS + 5: 392 ret = s->phys[offset - EN1_PHYS]; 393 break; 394 case EN1_CURPAG: 395 ret = s->curpag; 396 break; 397 case EN1_MULT ... EN1_MULT + 7: 398 ret = s->mult[offset - EN1_MULT]; 399 break; 400 case EN0_RSR: 401 ret = s->rsr; 402 break; 403 case EN2_STARTPG: 404 ret = s->start >> 8; 405 break; 406 case EN2_STOPPG: 407 ret = s->stop >> 8; 408 break; 409 case EN0_RTL8029ID0: 410 ret = 0x50; 411 break; 412 case EN0_RTL8029ID1: 413 ret = 0x43; 414 break; 415 case EN3_CONFIG0: 416 ret = 0; /* 10baseT media */ 417 break; 418 case EN3_CONFIG2: 419 ret = 0x40; /* 10baseT active */ 420 break; 421 case EN3_CONFIG3: 422 ret = 0x40; /* Full duplex */ 423 break; 424 default: 425 ret = 0x00; 426 break; 427 } 428 } 429 trace_ne2000_ioport_read(addr, ret); 430 return ret; 431 } 432 433 static inline void ne2000_mem_writeb(NE2000State *s, uint32_t addr, 434 uint32_t val) 435 { 436 if (addr < 32 || 437 (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) { 438 s->mem[addr] = val; 439 } 440 } 441 442 static inline void ne2000_mem_writew(NE2000State *s, uint32_t addr, 443 uint32_t val) 444 { 445 addr &= ~1; /* XXX: check exact behaviour if not even */ 446 if (addr < 32 || 447 (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) { 448 *(uint16_t *)(s->mem + addr) = cpu_to_le16(val); 449 } 450 } 451 452 static inline void ne2000_mem_writel(NE2000State *s, uint32_t addr, 453 uint32_t val) 454 { 455 addr &= ~1; /* XXX: check exact behaviour if not even */ 456 if (addr < 32 457 || (addr >= NE2000_PMEM_START 458 && addr + sizeof(uint32_t) <= NE2000_MEM_SIZE)) { 459 stl_le_p(s->mem + addr, val); 460 } 461 } 462 463 static inline uint32_t ne2000_mem_readb(NE2000State *s, uint32_t addr) 464 { 465 if (addr < 32 || 466 (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) { 467 return s->mem[addr]; 468 } else { 469 return 0xff; 470 } 471 } 472 473 static inline uint32_t ne2000_mem_readw(NE2000State *s, uint32_t addr) 474 { 475 addr &= ~1; /* XXX: check exact behaviour if not even */ 476 if (addr < 32 || 477 (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) { 478 return le16_to_cpu(*(uint16_t *)(s->mem + addr)); 479 } else { 480 return 0xffff; 481 } 482 } 483 484 static inline uint32_t ne2000_mem_readl(NE2000State *s, uint32_t addr) 485 { 486 addr &= ~1; /* XXX: check exact behaviour if not even */ 487 if (addr < 32 488 || (addr >= NE2000_PMEM_START 489 && addr + sizeof(uint32_t) <= NE2000_MEM_SIZE)) { 490 return ldl_le_p(s->mem + addr); 491 } else { 492 return 0xffffffff; 493 } 494 } 495 496 static inline void ne2000_dma_update(NE2000State *s, int len) 497 { 498 s->rsar += len; 499 /* wrap */ 500 /* XXX: check what to do if rsar > stop */ 501 if (s->rsar == s->stop) 502 s->rsar = s->start; 503 504 if (s->rcnt <= len) { 505 s->rcnt = 0; 506 /* signal end of transfer */ 507 s->isr |= ENISR_RDC; 508 ne2000_update_irq(s); 509 } else { 510 s->rcnt -= len; 511 } 512 } 513 514 static void ne2000_asic_ioport_write(void *opaque, uint32_t addr, uint32_t val) 515 { 516 NE2000State *s = opaque; 517 518 #ifdef DEBUG_NE2000 519 printf("NE2000: asic write val=0x%04x\n", val); 520 #endif 521 if (s->rcnt == 0) 522 return; 523 if (s->dcfg & 0x01) { 524 /* 16 bit access */ 525 ne2000_mem_writew(s, s->rsar, val); 526 ne2000_dma_update(s, 2); 527 } else { 528 /* 8 bit access */ 529 ne2000_mem_writeb(s, s->rsar, val); 530 ne2000_dma_update(s, 1); 531 } 532 } 533 534 static uint32_t ne2000_asic_ioport_read(void *opaque, uint32_t addr) 535 { 536 NE2000State *s = opaque; 537 int ret; 538 539 if (s->dcfg & 0x01) { 540 /* 16 bit access */ 541 ret = ne2000_mem_readw(s, s->rsar); 542 ne2000_dma_update(s, 2); 543 } else { 544 /* 8 bit access */ 545 ret = ne2000_mem_readb(s, s->rsar); 546 ne2000_dma_update(s, 1); 547 } 548 #ifdef DEBUG_NE2000 549 printf("NE2000: asic read val=0x%04x\n", ret); 550 #endif 551 return ret; 552 } 553 554 static void ne2000_asic_ioport_writel(void *opaque, uint32_t addr, uint32_t val) 555 { 556 NE2000State *s = opaque; 557 558 #ifdef DEBUG_NE2000 559 printf("NE2000: asic writel val=0x%04x\n", val); 560 #endif 561 if (s->rcnt == 0) 562 return; 563 /* 32 bit access */ 564 ne2000_mem_writel(s, s->rsar, val); 565 ne2000_dma_update(s, 4); 566 } 567 568 static uint32_t ne2000_asic_ioport_readl(void *opaque, uint32_t addr) 569 { 570 NE2000State *s = opaque; 571 int ret; 572 573 /* 32 bit access */ 574 ret = ne2000_mem_readl(s, s->rsar); 575 ne2000_dma_update(s, 4); 576 #ifdef DEBUG_NE2000 577 printf("NE2000: asic readl val=0x%04x\n", ret); 578 #endif 579 return ret; 580 } 581 582 static void ne2000_reset_ioport_write(void *opaque, uint32_t addr, uint32_t val) 583 { 584 /* nothing to do (end of reset pulse) */ 585 } 586 587 static uint32_t ne2000_reset_ioport_read(void *opaque, uint32_t addr) 588 { 589 NE2000State *s = opaque; 590 ne2000_reset(s); 591 return 0; 592 } 593 594 static int ne2000_post_load(void* opaque, int version_id) 595 { 596 NE2000State* s = opaque; 597 598 if (version_id < 2) { 599 s->rxcr = 0x0c; 600 } 601 return 0; 602 } 603 604 const VMStateDescription vmstate_ne2000 = { 605 .name = "ne2000", 606 .version_id = 2, 607 .minimum_version_id = 0, 608 .post_load = ne2000_post_load, 609 .fields = (VMStateField[]) { 610 VMSTATE_UINT8_V(rxcr, NE2000State, 2), 611 VMSTATE_UINT8(cmd, NE2000State), 612 VMSTATE_UINT32(start, NE2000State), 613 VMSTATE_UINT32(stop, NE2000State), 614 VMSTATE_UINT8(boundary, NE2000State), 615 VMSTATE_UINT8(tsr, NE2000State), 616 VMSTATE_UINT8(tpsr, NE2000State), 617 VMSTATE_UINT16(tcnt, NE2000State), 618 VMSTATE_UINT16(rcnt, NE2000State), 619 VMSTATE_UINT32(rsar, NE2000State), 620 VMSTATE_UINT8(rsr, NE2000State), 621 VMSTATE_UINT8(isr, NE2000State), 622 VMSTATE_UINT8(dcfg, NE2000State), 623 VMSTATE_UINT8(imr, NE2000State), 624 VMSTATE_BUFFER(phys, NE2000State), 625 VMSTATE_UINT8(curpag, NE2000State), 626 VMSTATE_BUFFER(mult, NE2000State), 627 VMSTATE_UNUSED(4), /* was irq */ 628 VMSTATE_BUFFER(mem, NE2000State), 629 VMSTATE_END_OF_LIST() 630 } 631 }; 632 633 static uint64_t ne2000_read(void *opaque, hwaddr addr, 634 unsigned size) 635 { 636 NE2000State *s = opaque; 637 uint64_t val; 638 639 if (addr < 0x10 && size == 1) { 640 val = ne2000_ioport_read(s, addr); 641 } else if (addr == 0x10) { 642 if (size <= 2) { 643 val = ne2000_asic_ioport_read(s, addr); 644 } else { 645 val = ne2000_asic_ioport_readl(s, addr); 646 } 647 } else if (addr == 0x1f && size == 1) { 648 val = ne2000_reset_ioport_read(s, addr); 649 } else { 650 val = ((uint64_t)1 << (size * 8)) - 1; 651 } 652 trace_ne2000_read(addr, val); 653 654 return val; 655 } 656 657 static void ne2000_write(void *opaque, hwaddr addr, 658 uint64_t data, unsigned size) 659 { 660 NE2000State *s = opaque; 661 662 trace_ne2000_write(addr, data); 663 if (addr < 0x10 && size == 1) { 664 ne2000_ioport_write(s, addr, data); 665 } else if (addr == 0x10) { 666 if (size <= 2) { 667 ne2000_asic_ioport_write(s, addr, data); 668 } else { 669 ne2000_asic_ioport_writel(s, addr, data); 670 } 671 } else if (addr == 0x1f && size == 1) { 672 ne2000_reset_ioport_write(s, addr, data); 673 } 674 } 675 676 static const MemoryRegionOps ne2000_ops = { 677 .read = ne2000_read, 678 .write = ne2000_write, 679 .endianness = DEVICE_LITTLE_ENDIAN, 680 }; 681 682 /***********************************************************/ 683 /* PCI NE2000 definitions */ 684 685 void ne2000_setup_io(NE2000State *s, DeviceState *dev, unsigned size) 686 { 687 memory_region_init_io(&s->io, OBJECT(dev), &ne2000_ops, s, "ne2000", size); 688 } 689