hw/ne2000.c

   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 #include "hw.h"
  25 #include "pci.h"
  26 #include "pc.h"
  27 #include "net.h"
  28
  29 /* debug NE2000 card */
  30 //#define DEBUG_NE2000
  31
  32 #define MAX_ETH_FRAME_SIZE 1514
  33
  34 #define E8390_CMD       0x00  /* The command register (for all pages) */
  35 /* Page 0 register offsets. */
  36 #define EN0_CLDALO      0x01    /* Low byte of current local dma addr  RD */
  37 #define EN0_STARTPG     0x01    /* Starting page of ring bfr WR */
  38 #define EN0_CLDAHI      0x02    /* High byte of current local dma addr  RD */
  39 #define EN0_STOPPG      0x02    /* Ending page +1 of ring bfr WR */
  40 #define EN0_BOUNDARY    0x03    /* Boundary page of ring bfr RD WR */
  41 #define EN0_TSR         0x04    /* Transmit status reg RD */
  42 #define EN0_TPSR        0x04    /* Transmit starting page WR */
  43 #define EN0_NCR         0x05    /* Number of collision reg RD */
  44 #define EN0_TCNTLO      0x05    /* Low  byte of tx byte count WR */
  45 #define EN0_FIFO        0x06    /* FIFO RD */
  46 #define EN0_TCNTHI      0x06    /* High byte of tx byte count WR */
  47 #define EN0_ISR         0x07    /* Interrupt status reg RD WR */
  48 #define EN0_CRDALO      0x08    /* low byte of current remote dma address RD */
  49 #define EN0_RSARLO      0x08    /* Remote start address reg 0 */
  50 #define EN0_CRDAHI      0x09    /* high byte, current remote dma address RD */
  51 #define EN0_RSARHI      0x09    /* Remote start address reg 1 */
  52 #define EN0_RCNTLO      0x0a    /* Remote byte count reg WR */
  53 #define EN0_RTL8029ID0  0x0a    /* Realtek ID byte #1 RD */
  54 #define EN0_RCNTHI      0x0b    /* Remote byte count reg WR */
  55 #define EN0_RTL8029ID1  0x0b    /* Realtek ID byte #2 RD */
  56 #define EN0_RSR         0x0c    /* rx status reg RD */
  57 #define EN0_RXCR        0x0c    /* RX configuration reg WR */
  58 #define EN0_TXCR        0x0d    /* TX configuration reg WR */
  59 #define EN0_COUNTER0    0x0d    /* Rcv alignment error counter RD */
  60 #define EN0_DCFG        0x0e    /* Data configuration reg WR */
  61 #define EN0_COUNTER1    0x0e    /* Rcv CRC error counter RD */
  62 #define EN0_IMR         0x0f    /* Interrupt mask reg WR */
  63 #define EN0_COUNTER2    0x0f    /* Rcv missed frame error counter RD */
  64
  65 #define EN1_PHYS        0x11
  66 #define EN1_CURPAG      0x17
  67 #define EN1_MULT        0x18
  68
  69 #define EN2_STARTPG     0x21    /* Starting page of ring bfr RD */
  70 #define EN2_STOPPG      0x22    /* Ending page +1 of ring bfr RD */
  71
  72 #define EN3_CONFIG0     0x33
  73 #define EN3_CONFIG1     0x34
  74 #define EN3_CONFIG2     0x35
  75 #define EN3_CONFIG3     0x36
  76
  77 /*  Register accessed at EN_CMD, the 8390 base addr.  */
  78 #define E8390_STOP      0x01    /* Stop and reset the chip */
  79 #define E8390_START     0x02    /* Start the chip, clear reset */
  80 #define E8390_TRANS     0x04    /* Transmit a frame */
  81 #define E8390_RREAD     0x08    /* Remote read */
  82 #define E8390_RWRITE    0x10    /* Remote write  */
  83 #define E8390_NODMA     0x20    /* Remote DMA */
  84 #define E8390_PAGE0     0x00    /* Select page chip registers */
  85 #define E8390_PAGE1     0x40    /* using the two high-order bits */
  86 #define E8390_PAGE2     0x80    /* Page 3 is invalid. */
  87
  88 /* Bits in EN0_ISR - Interrupt status register */
  89 #define ENISR_RX        0x01    /* Receiver, no error */
  90 #define ENISR_TX        0x02    /* Transmitter, no error */
  91 #define ENISR_RX_ERR    0x04    /* Receiver, with error */
  92 #define ENISR_TX_ERR    0x08    /* Transmitter, with error */
  93 #define ENISR_OVER      0x10    /* Receiver overwrote the ring */
  94 #define ENISR_COUNTERS  0x20    /* Counters need emptying */
  95 #define ENISR_RDC       0x40    /* remote dma complete */
  96 #define ENISR_RESET     0x80    /* Reset completed */
  97 #define ENISR_ALL       0x3f    /* Interrupts we will enable */
  98
  99 /* Bits in received packet status byte and EN0_RSR*/
 100 #define ENRSR_RXOK      0x01    /* Received a good packet */
 101 #define ENRSR_CRC       0x02    /* CRC error */
 102 #define ENRSR_FAE       0x04    /* frame alignment error */
 103 #define ENRSR_FO        0x08    /* FIFO overrun */
 104 #define ENRSR_MPA       0x10    /* missed pkt */
 105 #define ENRSR_PHY       0x20    /* physical/multicast address */
 106 #define ENRSR_DIS       0x40    /* receiver disable. set in monitor mode */
 107 #define ENRSR_DEF       0x80    /* deferring */
 108
 109 /* Transmitted packet status, EN0_TSR. */
 110 #define ENTSR_PTX 0x01  /* Packet transmitted without error */
 111 #define ENTSR_ND  0x02  /* The transmit wasn't deferred. */
 112 #define ENTSR_COL 0x04  /* The transmit collided at least once. */
 113 #define ENTSR_ABT 0x08  /* The transmit collided 16 times, and was deferred. */
 114 #define ENTSR_CRS 0x10  /* The carrier sense was lost. */
 115 #define ENTSR_FU  0x20  /* A "FIFO underrun" occurred during transmit. */
 116 #define ENTSR_CDH 0x40  /* The collision detect "heartbeat" signal was lost. */
 117 #define ENTSR_OWC 0x80  /* There was an out-of-window collision. */
 118
 119 #define NE2000_PMEM_SIZE    (32*1024)
 120 #define NE2000_PMEM_START   (16*1024)
 121 #define NE2000_PMEM_END     (NE2000_PMEM_SIZE+NE2000_PMEM_START)
 122 #define NE2000_MEM_SIZE     NE2000_PMEM_END
 123
 124 typedef struct NE2000State {
 125     uint8_t cmd;
 126     uint32_t start;
 127     uint32_t stop;
 128     uint8_t boundary;
 129     uint8_t tsr;
 130     uint8_t tpsr;
 131     uint16_t tcnt;
 132     uint16_t rcnt;
 133     uint32_t rsar;
 134     uint8_t rsr;
 135     uint8_t rxcr;
 136     uint8_t isr;
 137     uint8_t dcfg;
 138     uint8_t imr;
 139     uint8_t phys[6]; /* mac address */
 140     uint8_t curpag;
 141     uint8_t mult[8]; /* multicast mask array */
 142     qemu_irq irq;
 143     PCIDevice *pci_dev;
 144     VLANClientState *vc;
 145     uint8_t macaddr[6];
 146     uint8_t mem[NE2000_MEM_SIZE];
 147 } NE2000State;
 148
 149 static void ne2000_reset(NE2000State *s)
 150 {
 151     int i;
 152
 153     s->isr = ENISR_RESET;
 154     memcpy(s->mem, s->macaddr, 6);
 155     s->mem[14] = 0x57;
 156     s->mem[15] = 0x57;
 157
 158     /* duplicate prom data */
 159     for(i = 15;i >= 0; i--) {
 160         s->mem[2 * i] = s->mem[i];
 161         s->mem[2 * i + 1] = s->mem[i];
 162     }
 163 }
 164
 165 static void ne2000_update_irq(NE2000State *s)
 166 {
 167     int isr;
 168     isr = (s->isr & s->imr) & 0x7f;
 169 #if defined(DEBUG_NE2000)
 170     printf("NE2000: Set IRQ to %d (%02x %02x)\n",
 171            isr ? 1 : 0, s->isr, s->imr);
 172 #endif
 173     qemu_set_irq(s->irq, (isr != 0));
 174 }
 175
 176 #define POLYNOMIAL 0x04c11db6
 177
 178 /* From FreeBSD */
 179 /* XXX: optimize */
 180 static int compute_mcast_idx(const uint8_t *ep)
 181 {
 182     uint32_t crc;
 183     int carry, i, j;
 184     uint8_t b;
 185
 186     crc = 0xffffffff;
 187     for (i = 0; i < 6; i++) {
 188         b = *ep++;
 189         for (j = 0; j < 8; j++) {
 190             carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01);
 191             crc <<= 1;
 192             b >>= 1;
 193             if (carry)
 194                 crc = ((crc ^ POLYNOMIAL) | carry);
 195         }
 196     }
 197     return (crc >> 26);
 198 }
 199
 200 static int ne2000_buffer_full(NE2000State *s)
 201 {
 202     int avail, index, boundary;
 203
 204     index = s->curpag << 8;
 205     boundary = s->boundary << 8;
 206     if (index < boundary)
 207         avail = boundary - index;
 208     else
 209         avail = (s->stop - s->start) - (index - boundary);
 210     if (avail < (MAX_ETH_FRAME_SIZE + 4))
 211         return 1;
 212     return 0;
 213 }
 214
 215 static int ne2000_can_receive(void *opaque)
 216 {
 217     NE2000State *s = opaque;
 218
 219     if (s->cmd & E8390_STOP)
 220         return 1;
 221     return !ne2000_buffer_full(s);
 222 }
 223
 224 #define MIN_BUF_SIZE 60
 225
 226 static void ne2000_receive(void *opaque, const uint8_t *buf, int size)
 227 {
 228     NE2000State *s = opaque;
 229     uint8_t *p;
 230     unsigned int total_len, next, avail, len, index, mcast_idx;
 231     uint8_t buf1[60];
 232     static const uint8_t broadcast_macaddr[6] =
 233         { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 234
 235 #if defined(DEBUG_NE2000)
 236     printf("NE2000: received len=%d\n", size);
 237 #endif
 238
 239     if (s->cmd & E8390_STOP || ne2000_buffer_full(s))
 240         return;
 241
 242     /* XXX: check this */
 243     if (s->rxcr & 0x10) {
 244         /* promiscuous: receive all */
 245     } else {
 246         if (!memcmp(buf,  broadcast_macaddr, 6)) {
 247             /* broadcast address */
 248             if (!(s->rxcr & 0x04))
 249                 return;
 250         } else if (buf[0] & 0x01) {
 251             /* multicast */
 252             if (!(s->rxcr & 0x08))
 253                 return;
 254             mcast_idx = compute_mcast_idx(buf);
 255             if (!(s->mult[mcast_idx >> 3] & (1 << (mcast_idx & 7))))
 256                 return;
 257         } else if (s->mem[0] == buf[0] &&
 258                    s->mem[2] == buf[1] &&
 259                    s->mem[4] == buf[2] &&
 260                    s->mem[6] == buf[3] &&
 261                    s->mem[8] == buf[4] &&
 262                    s->mem[10] == buf[5]) {
 263             /* match */
 264         } else {
 265             return;
 266         }
 267     }
 268
 269
 270     /* if too small buffer, then expand it */
 271     if (size < MIN_BUF_SIZE) {
 272         memcpy(buf1, buf, size);
 273         memset(buf1 + size, 0, MIN_BUF_SIZE - size);
 274         buf = buf1;
 275         size = MIN_BUF_SIZE;
 276     }
 277
 278     index = s->curpag << 8;
 279     /* 4 bytes for header */
 280     total_len = size + 4;
 281     /* address for next packet (4 bytes for CRC) */
 282     next = index + ((total_len + 4 + 255) & ~0xff);
 283     if (next >= s->stop)
 284         next -= (s->stop - s->start);
 285     /* prepare packet header */
 286     p = s->mem + index;
 287     s->rsr = ENRSR_RXOK; /* receive status */
 288     /* XXX: check this */
 289     if (buf[0] & 0x01)
 290         s->rsr |= ENRSR_PHY;
 291     p[0] = s->rsr;
 292     p[1] = next >> 8;
 293     p[2] = total_len;
 294     p[3] = total_len >> 8;
 295     index += 4;
 296
 297     /* write packet data */
 298     while (size > 0) {
 299         if (index <= s->stop)
 300             avail = s->stop - index;
 301         else
 302             avail = 0;
 303         len = size;
 304         if (len > avail)
 305             len = avail;
 306         memcpy(s->mem + index, buf, len);
 307         buf += len;
 308         index += len;
 309         if (index == s->stop)
 310             index = s->start;
 311         size -= len;
 312     }
 313     s->curpag = next >> 8;
 314
 315     /* now we can signal we have received something */
 316     s->isr |= ENISR_RX;
 317     ne2000_update_irq(s);
 318 }
 319
 320 static void ne2000_ioport_write(void *opaque, uint32_t addr, uint32_t val)
 321 {
 322     NE2000State *s = opaque;
 323     int offset, page, index;
 324
 325     addr &= 0xf;
 326 #ifdef DEBUG_NE2000
 327     printf("NE2000: write addr=0x%x val=0x%02x\n", addr, val);
 328 #endif
 329     if (addr == E8390_CMD) {
 330         /* control register */
 331         s->cmd = val;
 332         if (!(val & E8390_STOP)) { /* START bit makes no sense on RTL8029... */
 333             s->isr &= ~ENISR_RESET;
 334             /* test specific case: zero length transfer */
 335             if ((val & (E8390_RREAD | E8390_RWRITE)) &&
 336                 s->rcnt == 0) {
 337                 s->isr |= ENISR_RDC;
 338                 ne2000_update_irq(s);
 339             }
 340             if (val & E8390_TRANS) {
 341                 index = (s->tpsr << 8);
 342                 /* XXX: next 2 lines are a hack to make netware 3.11 work */
 343                 if (index >= NE2000_PMEM_END)
 344                     index -= NE2000_PMEM_SIZE;
 345                 /* fail safe: check range on the transmitted length  */
 346                 if (index + s->tcnt <= NE2000_PMEM_END) {
 347                     qemu_send_packet(s->vc, s->mem + index, s->tcnt);
 348                 }
 349                 /* signal end of transfer */
 350                 s->tsr = ENTSR_PTX;
 351                 s->isr |= ENISR_TX;
 352                 s->cmd &= ~E8390_TRANS;
 353                 ne2000_update_irq(s);
 354             }
 355         }
 356     } else {
 357         page = s->cmd >> 6;
 358         offset = addr | (page << 4);
 359         switch(offset) {
 360         case EN0_STARTPG:
 361             s->start = val << 8;
 362             break;
 363         case EN0_STOPPG:
 364             s->stop = val << 8;
 365             break;
 366         case EN0_BOUNDARY:
 367             s->boundary = val;
 368             break;
 369         case EN0_IMR:
 370             s->imr = val;
 371             ne2000_update_irq(s);
 372             break;
 373         case EN0_TPSR:
 374             s->tpsr = val;
 375             break;
 376         case EN0_TCNTLO:
 377             s->tcnt = (s->tcnt & 0xff00) | val;
 378             break;
 379         case EN0_TCNTHI:
 380             s->tcnt = (s->tcnt & 0x00ff) | (val << 8);
 381             break;
 382         case EN0_RSARLO:
 383             s->rsar = (s->rsar & 0xff00) | val;
 384             break;
 385         case EN0_RSARHI:
 386             s->rsar = (s->rsar & 0x00ff) | (val << 8);
 387             break;
 388         case EN0_RCNTLO:
 389             s->rcnt = (s->rcnt & 0xff00) | val;
 390             break;
 391         case EN0_RCNTHI:
 392             s->rcnt = (s->rcnt & 0x00ff) | (val << 8);
 393             break;
 394         case EN0_RXCR:
 395             s->rxcr = val;
 396             break;
 397         case EN0_DCFG:
 398             s->dcfg = val;
 399             break;
 400         case EN0_ISR:
 401             s->isr &= ~(val & 0x7f);
 402             ne2000_update_irq(s);
 403             break;
 404         case EN1_PHYS ... EN1_PHYS + 5:
 405             s->phys[offset - EN1_PHYS] = val;
 406             break;
 407         case EN1_CURPAG:
 408             s->curpag = val;
 409             break;
 410         case EN1_MULT ... EN1_MULT + 7:
 411             s->mult[offset - EN1_MULT] = val;
 412             break;
 413         }
 414     }
 415 }
 416
 417 static uint32_t ne2000_ioport_read(void *opaque, uint32_t addr)
 418 {
 419     NE2000State *s = opaque;
 420     int offset, page, ret;
 421
 422     addr &= 0xf;
 423     if (addr == E8390_CMD) {
 424         ret = s->cmd;
 425     } else {
 426         page = s->cmd >> 6;
 427         offset = addr | (page << 4);
 428         switch(offset) {
 429         case EN0_TSR:
 430             ret = s->tsr;
 431             break;
 432         case EN0_BOUNDARY:
 433             ret = s->boundary;
 434             break;
 435         case EN0_ISR:
 436             ret = s->isr;
 437             break;
 438         case EN0_RSARLO:
 439             ret = s->rsar & 0x00ff;
 440             break;
 441         case EN0_RSARHI:
 442             ret = s->rsar >> 8;
 443             break;
 444         case EN1_PHYS ... EN1_PHYS + 5:
 445             ret = s->phys[offset - EN1_PHYS];
 446             break;
 447         case EN1_CURPAG:
 448             ret = s->curpag;
 449             break;
 450         case EN1_MULT ... EN1_MULT + 7:
 451             ret = s->mult[offset - EN1_MULT];
 452             break;
 453         case EN0_RSR:
 454             ret = s->rsr;
 455             break;
 456         case EN2_STARTPG:
 457             ret = s->start >> 8;
 458             break;
 459         case EN2_STOPPG:
 460             ret = s->stop >> 8;
 461             break;
 462         case EN0_RTL8029ID0:
 463             ret = 0x50;
 464             break;
 465         case EN0_RTL8029ID1:
 466             ret = 0x43;
 467             break;
 468         case EN3_CONFIG0:
 469             ret = 0;            /* 10baseT media */
 470             break;
 471         case EN3_CONFIG2:
 472             ret = 0x40;         /* 10baseT active */
 473             break;
 474         case EN3_CONFIG3:
 475             ret = 0x40;         /* Full duplex */
 476             break;
 477         default:
 478             ret = 0x00;
 479             break;
 480         }
 481     }
 482 #ifdef DEBUG_NE2000
 483     printf("NE2000: read addr=0x%x val=%02x\n", addr, ret);
 484 #endif
 485     return ret;
 486 }
 487
 488 static inline void ne2000_mem_writeb(NE2000State *s, uint32_t addr,
 489                                      uint32_t val)
 490 {
 491     if (addr < 32 ||
 492         (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) {
 493         s->mem[addr] = val;
 494     }
 495 }
 496
 497 static inline void ne2000_mem_writew(NE2000State *s, uint32_t addr,
 498                                      uint32_t val)
 499 {
 500     addr &= ~1; /* XXX: check exact behaviour if not even */
 501     if (addr < 32 ||
 502         (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) {
 503         *(uint16_t *)(s->mem + addr) = cpu_to_le16(val);
 504     }
 505 }
 506
 507 static inline void ne2000_mem_writel(NE2000State *s, uint32_t addr,
 508                                      uint32_t val)
 509 {
 510     addr &= ~1; /* XXX: check exact behaviour if not even */
 511     if (addr < 32 ||
 512         (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) {
 513         cpu_to_le32wu((uint32_t *)(s->mem + addr), val);
 514     }
 515 }
 516
 517 static inline uint32_t ne2000_mem_readb(NE2000State *s, uint32_t addr)
 518 {
 519     if (addr < 32 ||
 520         (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) {
 521         return s->mem[addr];
 522     } else {
 523         return 0xff;
 524     }
 525 }
 526
 527 static inline uint32_t ne2000_mem_readw(NE2000State *s, uint32_t addr)
 528 {
 529     addr &= ~1; /* XXX: check exact behaviour if not even */
 530     if (addr < 32 ||
 531         (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) {
 532         return le16_to_cpu(*(uint16_t *)(s->mem + addr));
 533     } else {
 534         return 0xffff;
 535     }
 536 }
 537
 538 static inline uint32_t ne2000_mem_readl(NE2000State *s, uint32_t addr)
 539 {
 540     addr &= ~1; /* XXX: check exact behaviour if not even */
 541     if (addr < 32 ||
 542         (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) {
 543         return le32_to_cpupu((uint32_t *)(s->mem + addr));
 544     } else {
 545         return 0xffffffff;
 546     }
 547 }
 548
 549 static inline void ne2000_dma_update(NE2000State *s, int len)
 550 {
 551     s->rsar += len;
 552     /* wrap */
 553     /* XXX: check what to do if rsar > stop */
 554     if (s->rsar == s->stop)
 555         s->rsar = s->start;
 556
 557     if (s->rcnt <= len) {
 558         s->rcnt = 0;
 559         /* signal end of transfer */
 560         s->isr |= ENISR_RDC;
 561         ne2000_update_irq(s);
 562     } else {
 563         s->rcnt -= len;
 564     }
 565 }
 566
 567 static void ne2000_asic_ioport_write(void *opaque, uint32_t addr, uint32_t val)
 568 {
 569     NE2000State *s = opaque;
 570
 571 #ifdef DEBUG_NE2000
 572     printf("NE2000: asic write val=0x%04x\n", val);
 573 #endif
 574     if (s->rcnt == 0)
 575         return;
 576     if (s->dcfg & 0x01) {
 577         /* 16 bit access */
 578         ne2000_mem_writew(s, s->rsar, val);
 579         ne2000_dma_update(s, 2);
 580     } else {
 581         /* 8 bit access */
 582         ne2000_mem_writeb(s, s->rsar, val);
 583         ne2000_dma_update(s, 1);
 584     }
 585 }
 586
 587 static uint32_t ne2000_asic_ioport_read(void *opaque, uint32_t addr)
 588 {
 589     NE2000State *s = opaque;
 590     int ret;
 591
 592     if (s->dcfg & 0x01) {
 593         /* 16 bit access */
 594         ret = ne2000_mem_readw(s, s->rsar);
 595         ne2000_dma_update(s, 2);
 596     } else {
 597         /* 8 bit access */
 598         ret = ne2000_mem_readb(s, s->rsar);
 599         ne2000_dma_update(s, 1);
 600     }
 601 #ifdef DEBUG_NE2000
 602     printf("NE2000: asic read val=0x%04x\n", ret);
 603 #endif
 604     return ret;
 605 }
 606
 607 static void ne2000_asic_ioport_writel(void *opaque, uint32_t addr, uint32_t val)
 608 {
 609     NE2000State *s = opaque;
 610
 611 #ifdef DEBUG_NE2000
 612     printf("NE2000: asic writel val=0x%04x\n", val);
 613 #endif
 614     if (s->rcnt == 0)
 615         return;
 616     /* 32 bit access */
 617     ne2000_mem_writel(s, s->rsar, val);
 618     ne2000_dma_update(s, 4);
 619 }
 620
 621 static uint32_t ne2000_asic_ioport_readl(void *opaque, uint32_t addr)
 622 {
 623     NE2000State *s = opaque;
 624     int ret;
 625
 626     /* 32 bit access */
 627     ret = ne2000_mem_readl(s, s->rsar);
 628     ne2000_dma_update(s, 4);
 629 #ifdef DEBUG_NE2000
 630     printf("NE2000: asic readl val=0x%04x\n", ret);
 631 #endif
 632     return ret;
 633 }
 634
 635 static void ne2000_reset_ioport_write(void *opaque, uint32_t addr, uint32_t val)
 636 {
 637     /* nothing to do (end of reset pulse) */
 638 }
 639
 640 static uint32_t ne2000_reset_ioport_read(void *opaque, uint32_t addr)
 641 {
 642     NE2000State *s = opaque;
 643     ne2000_reset(s);
 644     return 0;
 645 }
 646
 647 static void ne2000_save(QEMUFile* f,void* opaque)
 648 {
 649         NE2000State* s=(NE2000State*)opaque;
 650         uint32_t tmp;
 651
 652         if (s->pci_dev)
 653             pci_device_save(s->pci_dev, f);
 654
 655         qemu_put_8s(f, &s->rxcr);
 656
 657         qemu_put_8s(f, &s->cmd);
 658         qemu_put_be32s(f, &s->start);
 659         qemu_put_be32s(f, &s->stop);
 660         qemu_put_8s(f, &s->boundary);
 661         qemu_put_8s(f, &s->tsr);
 662         qemu_put_8s(f, &s->tpsr);
 663         qemu_put_be16s(f, &s->tcnt);
 664         qemu_put_be16s(f, &s->rcnt);
 665         qemu_put_be32s(f, &s->rsar);
 666         qemu_put_8s(f, &s->rsr);
 667         qemu_put_8s(f, &s->isr);
 668         qemu_put_8s(f, &s->dcfg);
 669         qemu_put_8s(f, &s->imr);
 670         qemu_put_buffer(f, s->phys, 6);
 671         qemu_put_8s(f, &s->curpag);
 672         qemu_put_buffer(f, s->mult, 8);
 673         tmp = 0;
 674         qemu_put_be32s(f, &tmp); /* ignored, was irq */
 675         qemu_put_buffer(f, s->mem, NE2000_MEM_SIZE);
 676 }
 677
 678 static int ne2000_load(QEMUFile* f,void* opaque,int version_id)
 679 {
 680         NE2000State* s=(NE2000State*)opaque;
 681         int ret;
 682         uint32_t tmp;
 683
 684         if (version_id > 3)
 685             return -EINVAL;
 686
 687         if (s->pci_dev && version_id >= 3) {
 688             ret = pci_device_load(s->pci_dev, f);
 689             if (ret < 0)
 690                 return ret;
 691         }
 692
 693         if (version_id >= 2) {
 694             qemu_get_8s(f, &s->rxcr);
 695         } else {
 696             s->rxcr = 0x0c;
 697         }
 698
 699         qemu_get_8s(f, &s->cmd);
 700         qemu_get_be32s(f, &s->start);
 701         qemu_get_be32s(f, &s->stop);
 702         qemu_get_8s(f, &s->boundary);
 703         qemu_get_8s(f, &s->tsr);
 704         qemu_get_8s(f, &s->tpsr);
 705         qemu_get_be16s(f, &s->tcnt);
 706         qemu_get_be16s(f, &s->rcnt);
 707         qemu_get_be32s(f, &s->rsar);
 708         qemu_get_8s(f, &s->rsr);
 709         qemu_get_8s(f, &s->isr);
 710         qemu_get_8s(f, &s->dcfg);
 711         qemu_get_8s(f, &s->imr);
 712         qemu_get_buffer(f, s->phys, 6);
 713         qemu_get_8s(f, &s->curpag);
 714         qemu_get_buffer(f, s->mult, 8);
 715         qemu_get_be32s(f, &tmp); /* ignored */
 716         qemu_get_buffer(f, s->mem, NE2000_MEM_SIZE);
 717
 718         return 0;
 719 }
 720
 721 void isa_ne2000_init(int base, qemu_irq irq, NICInfo *nd)
 722 {
 723     NE2000State *s;
 724
 725     qemu_check_nic_model(nd, "ne2k_isa");
 726
 727     s = qemu_mallocz(sizeof(NE2000State));
 728     if (!s)
 729         return;
 730
 731     register_ioport_write(base, 16, 1, ne2000_ioport_write, s);
 732     register_ioport_read(base, 16, 1, ne2000_ioport_read, s);
 733
 734     register_ioport_write(base + 0x10, 1, 1, ne2000_asic_ioport_write, s);
 735     register_ioport_read(base + 0x10, 1, 1, ne2000_asic_ioport_read, s);
 736     register_ioport_write(base + 0x10, 2, 2, ne2000_asic_ioport_write, s);
 737     register_ioport_read(base + 0x10, 2, 2, ne2000_asic_ioport_read, s);
 738
 739     register_ioport_write(base + 0x1f, 1, 1, ne2000_reset_ioport_write, s);
 740     register_ioport_read(base + 0x1f, 1, 1, ne2000_reset_ioport_read, s);
 741     s->irq = irq;
 742     memcpy(s->macaddr, nd->macaddr, 6);
 743
 744     ne2000_reset(s);
 745
 746     s->vc = qemu_new_vlan_client(nd->vlan, nd->model, nd->name,
 747                                  ne2000_receive, ne2000_can_receive, s);
 748
 749     qemu_format_nic_info_str(s->vc, s->macaddr);
 750
 751     register_savevm("ne2000", -1, 2, ne2000_save, ne2000_load, s);
 752 }
 753
 754 /***********************************************************/
 755 /* PCI NE2000 definitions */
 756
 757 typedef struct PCINE2000State {
 758     PCIDevice dev;
 759     NE2000State ne2000;
 760 } PCINE2000State;
 761
 762 static void ne2000_map(PCIDevice *pci_dev, int region_num,
 763                        uint32_t addr, uint32_t size, int type)
 764 {
 765     PCINE2000State *d = (PCINE2000State *)pci_dev;
 766     NE2000State *s = &d->ne2000;
 767
 768     register_ioport_write(addr, 16, 1, ne2000_ioport_write, s);
 769     register_ioport_read(addr, 16, 1, ne2000_ioport_read, s);
 770
 771     register_ioport_write(addr + 0x10, 1, 1, ne2000_asic_ioport_write, s);
 772     register_ioport_read(addr + 0x10, 1, 1, ne2000_asic_ioport_read, s);
 773     register_ioport_write(addr + 0x10, 2, 2, ne2000_asic_ioport_write, s);
 774     register_ioport_read(addr + 0x10, 2, 2, ne2000_asic_ioport_read, s);
 775     register_ioport_write(addr + 0x10, 4, 4, ne2000_asic_ioport_writel, s);
 776     register_ioport_read(addr + 0x10, 4, 4, ne2000_asic_ioport_readl, s);
 777
 778     register_ioport_write(addr + 0x1f, 1, 1, ne2000_reset_ioport_write, s);
 779     register_ioport_read(addr + 0x1f, 1, 1, ne2000_reset_ioport_read, s);
 780 }
 781
 782 PCIDevice *pci_ne2000_init(PCIBus *bus, NICInfo *nd, int devfn)
 783 {
 784     PCINE2000State *d;
 785     NE2000State *s;
 786     uint8_t *pci_conf;
 787
 788     d = (PCINE2000State *)pci_register_device(bus,
 789                                               "NE2000", sizeof(PCINE2000State),
 790                                               devfn,
 791                                               NULL, NULL);
 792     if (!d)
 793        return NULL;
 794
 795     pci_conf = d->dev.config;
 796     pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_REALTEK);
 797     pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_REALTEK_RTL8029);
 798     pci_config_set_class(pci_conf, PCI_CLASS_NETWORK_ETHERNET);
 799     pci_conf[0x0e] = 0x00; // header_type
 800     pci_conf[0x3d] = 1; // interrupt pin 0
 801
 802     pci_register_io_region(&d->dev, 0, 0x100,
 803                            PCI_ADDRESS_SPACE_IO, ne2000_map);
 804     s = &d->ne2000;
 805     s->irq = d->dev.irq[0];
 806     s->pci_dev = (PCIDevice *)d;
 807     memcpy(s->macaddr, nd->macaddr, 6);
 808     ne2000_reset(s);
 809     s->vc = qemu_new_vlan_client(nd->vlan, nd->model, nd->name,
 810                                  ne2000_receive, ne2000_can_receive, s);
 811
 812     qemu_format_nic_info_str(s->vc, s->macaddr);
 813
 814     register_savevm("ne2000", -1, 3, ne2000_save, ne2000_load, s);
 815
 816     return (PCIDevice *)d;
 817 }