hw/pcnet.c

   1 /*
   2  * QEMU AMD PC-Net II (Am79C970A) emulation
   3  *
   4  * Copyright (c) 2004 Antony T Curtis
   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 /* This software was written to be compatible with the specification:
  26  * AMD Am79C970A PCnet-PCI II Ethernet Controller Data-Sheet
  27  * AMD Publication# 19436  Rev:E  Amendment/0  Issue Date: June 2000
  28  */
  29
  30 /*
  31  * On Sparc32, this is the Lance (Am7990) part of chip STP2000 (Master I/O), also
  32  * produced as NCR89C100. See
  33  * http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/NCR89C100.txt
  34  * and
  35  * http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/NCR92C990.txt
  36  */
  37
  38 #include "hw/qdev.h"
  39 #include "net/net.h"
  40 #include "qemu/timer.h"
  41 #include "qemu/sockets.h"
  42 #include "sysemu/sysemu.h"
  43
  44 #include "hw/pcnet.h"
  45
  46 //#define PCNET_DEBUG
  47 //#define PCNET_DEBUG_IO
  48 //#define PCNET_DEBUG_BCR
  49 //#define PCNET_DEBUG_CSR
  50 //#define PCNET_DEBUG_RMD
  51 //#define PCNET_DEBUG_TMD
  52 //#define PCNET_DEBUG_MATCH
  53
  54
  55 struct qemu_ether_header {
  56     uint8_t ether_dhost[6];
  57     uint8_t ether_shost[6];
  58     uint16_t ether_type;
  59 };
  60
  61 #define CSR_INIT(S)      !!(((S)->csr[0])&0x0001)
  62 #define CSR_STRT(S)      !!(((S)->csr[0])&0x0002)
  63 #define CSR_STOP(S)      !!(((S)->csr[0])&0x0004)
  64 #define CSR_TDMD(S)      !!(((S)->csr[0])&0x0008)
  65 #define CSR_TXON(S)      !!(((S)->csr[0])&0x0010)
  66 #define CSR_RXON(S)      !!(((S)->csr[0])&0x0020)
  67 #define CSR_INEA(S)      !!(((S)->csr[0])&0x0040)
  68 #define CSR_BSWP(S)      !!(((S)->csr[3])&0x0004)
  69 #define CSR_LAPPEN(S)    !!(((S)->csr[3])&0x0020)
  70 #define CSR_DXSUFLO(S)   !!(((S)->csr[3])&0x0040)
  71 #define CSR_ASTRP_RCV(S) !!(((S)->csr[4])&0x0800)
  72 #define CSR_DPOLL(S)     !!(((S)->csr[4])&0x1000)
  73 #define CSR_SPND(S)      !!(((S)->csr[5])&0x0001)
  74 #define CSR_LTINTEN(S)   !!(((S)->csr[5])&0x4000)
  75 #define CSR_TOKINTD(S)   !!(((S)->csr[5])&0x8000)
  76 #define CSR_DRX(S)       !!(((S)->csr[15])&0x0001)
  77 #define CSR_DTX(S)       !!(((S)->csr[15])&0x0002)
  78 #define CSR_LOOP(S)      !!(((S)->csr[15])&0x0004)
  79 #define CSR_DXMTFCS(S)   !!(((S)->csr[15])&0x0008)
  80 #define CSR_INTL(S)      !!(((S)->csr[15])&0x0040)
  81 #define CSR_DRCVPA(S)    !!(((S)->csr[15])&0x2000)
  82 #define CSR_DRCVBC(S)    !!(((S)->csr[15])&0x4000)
  83 #define CSR_PROM(S)      !!(((S)->csr[15])&0x8000)
  84
  85 #define CSR_CRBC(S)      ((S)->csr[40])
  86 #define CSR_CRST(S)      ((S)->csr[41])
  87 #define CSR_CXBC(S)      ((S)->csr[42])
  88 #define CSR_CXST(S)      ((S)->csr[43])
  89 #define CSR_NRBC(S)      ((S)->csr[44])
  90 #define CSR_NRST(S)      ((S)->csr[45])
  91 #define CSR_POLL(S)      ((S)->csr[46])
  92 #define CSR_PINT(S)      ((S)->csr[47])
  93 #define CSR_RCVRC(S)     ((S)->csr[72])
  94 #define CSR_XMTRC(S)     ((S)->csr[74])
  95 #define CSR_RCVRL(S)     ((S)->csr[76])
  96 #define CSR_XMTRL(S)     ((S)->csr[78])
  97 #define CSR_MISSC(S)     ((S)->csr[112])
  98
  99 #define CSR_IADR(S)      ((S)->csr[ 1] | ((uint32_t)(S)->csr[ 2] << 16))
 100 #define CSR_CRBA(S)      ((S)->csr[18] | ((uint32_t)(S)->csr[19] << 16))
 101 #define CSR_CXBA(S)      ((S)->csr[20] | ((uint32_t)(S)->csr[21] << 16))
 102 #define CSR_NRBA(S)      ((S)->csr[22] | ((uint32_t)(S)->csr[23] << 16))
 103 #define CSR_BADR(S)      ((S)->csr[24] | ((uint32_t)(S)->csr[25] << 16))
 104 #define CSR_NRDA(S)      ((S)->csr[26] | ((uint32_t)(S)->csr[27] << 16))
 105 #define CSR_CRDA(S)      ((S)->csr[28] | ((uint32_t)(S)->csr[29] << 16))
 106 #define CSR_BADX(S)      ((S)->csr[30] | ((uint32_t)(S)->csr[31] << 16))
 107 #define CSR_NXDA(S)      ((S)->csr[32] | ((uint32_t)(S)->csr[33] << 16))
 108 #define CSR_CXDA(S)      ((S)->csr[34] | ((uint32_t)(S)->csr[35] << 16))
 109 #define CSR_NNRD(S)      ((S)->csr[36] | ((uint32_t)(S)->csr[37] << 16))
 110 #define CSR_NNXD(S)      ((S)->csr[38] | ((uint32_t)(S)->csr[39] << 16))
 111 #define CSR_PXDA(S)      ((S)->csr[60] | ((uint32_t)(S)->csr[61] << 16))
 112 #define CSR_NXBA(S)      ((S)->csr[64] | ((uint32_t)(S)->csr[65] << 16))
 113
 114 #define PHYSADDR(S,A) \
 115   (BCR_SSIZE32(S) ? (A) : (A) | ((0xff00 & (uint32_t)(S)->csr[2])<<16))
 116
 117 struct pcnet_initblk16 {
 118     uint16_t mode;
 119     uint16_t padr[3];
 120     uint16_t ladrf[4];
 121     uint32_t rdra;
 122     uint32_t tdra;
 123 };
 124
 125 struct pcnet_initblk32 {
 126     uint16_t mode;
 127     uint8_t rlen;
 128     uint8_t tlen;
 129     uint16_t padr[3];
 130     uint16_t _res;
 131     uint16_t ladrf[4];
 132     uint32_t rdra;
 133     uint32_t tdra;
 134 };
 135
 136 struct pcnet_TMD {
 137     uint32_t tbadr;
 138     int16_t length;
 139     int16_t status;
 140     uint32_t misc;
 141     uint32_t res;
 142 };
 143
 144 #define TMDL_BCNT_MASK  0x0fff
 145 #define TMDL_BCNT_SH    0
 146 #define TMDL_ONES_MASK  0xf000
 147 #define TMDL_ONES_SH    12
 148
 149 #define TMDS_BPE_MASK   0x0080
 150 #define TMDS_BPE_SH     7
 151 #define TMDS_ENP_MASK   0x0100
 152 #define TMDS_ENP_SH     8
 153 #define TMDS_STP_MASK   0x0200
 154 #define TMDS_STP_SH     9
 155 #define TMDS_DEF_MASK   0x0400
 156 #define TMDS_DEF_SH     10
 157 #define TMDS_ONE_MASK   0x0800
 158 #define TMDS_ONE_SH     11
 159 #define TMDS_LTINT_MASK 0x1000
 160 #define TMDS_LTINT_SH   12
 161 #define TMDS_NOFCS_MASK 0x2000
 162 #define TMDS_NOFCS_SH   13
 163 #define TMDS_ADDFCS_MASK TMDS_NOFCS_MASK
 164 #define TMDS_ADDFCS_SH  TMDS_NOFCS_SH
 165 #define TMDS_ERR_MASK   0x4000
 166 #define TMDS_ERR_SH     14
 167 #define TMDS_OWN_MASK   0x8000
 168 #define TMDS_OWN_SH     15
 169
 170 #define TMDM_TRC_MASK   0x0000000f
 171 #define TMDM_TRC_SH     0
 172 #define TMDM_TDR_MASK   0x03ff0000
 173 #define TMDM_TDR_SH     16
 174 #define TMDM_RTRY_MASK  0x04000000
 175 #define TMDM_RTRY_SH    26
 176 #define TMDM_LCAR_MASK  0x08000000
 177 #define TMDM_LCAR_SH    27
 178 #define TMDM_LCOL_MASK  0x10000000
 179 #define TMDM_LCOL_SH    28
 180 #define TMDM_EXDEF_MASK 0x20000000
 181 #define TMDM_EXDEF_SH   29
 182 #define TMDM_UFLO_MASK  0x40000000
 183 #define TMDM_UFLO_SH    30
 184 #define TMDM_BUFF_MASK  0x80000000
 185 #define TMDM_BUFF_SH    31
 186
 187 struct pcnet_RMD {
 188     uint32_t rbadr;
 189     int16_t buf_length;
 190     int16_t status;
 191     uint32_t msg_length;
 192     uint32_t res;
 193 };
 194
 195 #define RMDL_BCNT_MASK  0x0fff
 196 #define RMDL_BCNT_SH    0
 197 #define RMDL_ONES_MASK  0xf000
 198 #define RMDL_ONES_SH    12
 199
 200 #define RMDS_BAM_MASK   0x0010
 201 #define RMDS_BAM_SH     4
 202 #define RMDS_LFAM_MASK  0x0020
 203 #define RMDS_LFAM_SH    5
 204 #define RMDS_PAM_MASK   0x0040
 205 #define RMDS_PAM_SH     6
 206 #define RMDS_BPE_MASK   0x0080
 207 #define RMDS_BPE_SH     7
 208 #define RMDS_ENP_MASK   0x0100
 209 #define RMDS_ENP_SH     8
 210 #define RMDS_STP_MASK   0x0200
 211 #define RMDS_STP_SH     9
 212 #define RMDS_BUFF_MASK  0x0400
 213 #define RMDS_BUFF_SH    10
 214 #define RMDS_CRC_MASK   0x0800
 215 #define RMDS_CRC_SH     11
 216 #define RMDS_OFLO_MASK  0x1000
 217 #define RMDS_OFLO_SH    12
 218 #define RMDS_FRAM_MASK  0x2000
 219 #define RMDS_FRAM_SH    13
 220 #define RMDS_ERR_MASK   0x4000
 221 #define RMDS_ERR_SH     14
 222 #define RMDS_OWN_MASK   0x8000
 223 #define RMDS_OWN_SH     15
 224
 225 #define RMDM_MCNT_MASK  0x00000fff
 226 #define RMDM_MCNT_SH    0
 227 #define RMDM_ZEROS_MASK 0x0000f000
 228 #define RMDM_ZEROS_SH   12
 229 #define RMDM_RPC_MASK   0x00ff0000
 230 #define RMDM_RPC_SH     16
 231 #define RMDM_RCC_MASK   0xff000000
 232 #define RMDM_RCC_SH     24
 233
 234 #define SET_FIELD(regp, name, field, value)             \
 235   (*(regp) = (*(regp) & ~(name ## _ ## field ## _MASK)) \
 236              | ((value) << name ## _ ## field ## _SH))
 237
 238 #define GET_FIELD(reg, name, field)                     \
 239   (((reg) & name ## _ ## field ## _MASK) >> name ## _ ## field ## _SH)
 240
 241 #define PRINT_TMD(T) printf(                            \
 242         "TMD0 : TBADR=0x%08x\n"                         \
 243         "TMD1 : OWN=%d, ERR=%d, FCS=%d, LTI=%d, "       \
 244         "ONE=%d, DEF=%d, STP=%d, ENP=%d,\n"             \
 245         "       BPE=%d, BCNT=%d\n"                      \
 246         "TMD2 : BUF=%d, UFL=%d, EXD=%d, LCO=%d, "       \
 247         "LCA=%d, RTR=%d,\n"                             \
 248         "       TDR=%d, TRC=%d\n",                      \
 249         (T)->tbadr,                                     \
 250         GET_FIELD((T)->status, TMDS, OWN),              \
 251         GET_FIELD((T)->status, TMDS, ERR),              \
 252         GET_FIELD((T)->status, TMDS, NOFCS),            \
 253         GET_FIELD((T)->status, TMDS, LTINT),            \
 254         GET_FIELD((T)->status, TMDS, ONE),              \
 255         GET_FIELD((T)->status, TMDS, DEF),              \
 256         GET_FIELD((T)->status, TMDS, STP),              \
 257         GET_FIELD((T)->status, TMDS, ENP),              \
 258         GET_FIELD((T)->status, TMDS, BPE),              \
 259         4096-GET_FIELD((T)->length, TMDL, BCNT),        \
 260         GET_FIELD((T)->misc, TMDM, BUFF),               \
 261         GET_FIELD((T)->misc, TMDM, UFLO),               \
 262         GET_FIELD((T)->misc, TMDM, EXDEF),              \
 263         GET_FIELD((T)->misc, TMDM, LCOL),               \
 264         GET_FIELD((T)->misc, TMDM, LCAR),               \
 265         GET_FIELD((T)->misc, TMDM, RTRY),               \
 266         GET_FIELD((T)->misc, TMDM, TDR),                \
 267         GET_FIELD((T)->misc, TMDM, TRC))
 268
 269 #define PRINT_RMD(R) printf(                            \
 270         "RMD0 : RBADR=0x%08x\n"                         \
 271         "RMD1 : OWN=%d, ERR=%d, FRAM=%d, OFLO=%d, "     \
 272         "CRC=%d, BUFF=%d, STP=%d, ENP=%d,\n       "     \
 273         "BPE=%d, PAM=%d, LAFM=%d, BAM=%d, ONES=%d, BCNT=%d\n" \
 274         "RMD2 : RCC=%d, RPC=%d, MCNT=%d, ZEROS=%d\n",   \
 275         (R)->rbadr,                                     \
 276         GET_FIELD((R)->status, RMDS, OWN),              \
 277         GET_FIELD((R)->status, RMDS, ERR),              \
 278         GET_FIELD((R)->status, RMDS, FRAM),             \
 279         GET_FIELD((R)->status, RMDS, OFLO),             \
 280         GET_FIELD((R)->status, RMDS, CRC),              \
 281         GET_FIELD((R)->status, RMDS, BUFF),             \
 282         GET_FIELD((R)->status, RMDS, STP),              \
 283         GET_FIELD((R)->status, RMDS, ENP),              \
 284         GET_FIELD((R)->status, RMDS, BPE),              \
 285         GET_FIELD((R)->status, RMDS, PAM),              \
 286         GET_FIELD((R)->status, RMDS, LFAM),             \
 287         GET_FIELD((R)->status, RMDS, BAM),              \
 288         GET_FIELD((R)->buf_length, RMDL, ONES),         \
 289         4096-GET_FIELD((R)->buf_length, RMDL, BCNT),    \
 290         GET_FIELD((R)->msg_length, RMDM, RCC),          \
 291         GET_FIELD((R)->msg_length, RMDM, RPC),          \
 292         GET_FIELD((R)->msg_length, RMDM, MCNT),         \
 293         GET_FIELD((R)->msg_length, RMDM, ZEROS))
 294
 295 static inline void pcnet_tmd_load(PCNetState *s, struct pcnet_TMD *tmd,
 296                                   hwaddr addr)
 297 {
 298     if (!BCR_SSIZE32(s)) {
 299         struct {
 300             uint32_t tbadr;
 301             int16_t length;
 302             int16_t status;
 303         } xda;
 304         s->phys_mem_read(s->dma_opaque, addr, (void *)&xda, sizeof(xda), 0);
 305         tmd->tbadr = le32_to_cpu(xda.tbadr) & 0xffffff;
 306         tmd->length = le16_to_cpu(xda.length);
 307         tmd->status = (le32_to_cpu(xda.tbadr) >> 16) & 0xff00;
 308         tmd->misc = le16_to_cpu(xda.status) << 16;
 309         tmd->res = 0;
 310     } else {
 311         s->phys_mem_read(s->dma_opaque, addr, (void *)tmd, sizeof(*tmd), 0);
 312         le32_to_cpus(&tmd->tbadr);
 313         le16_to_cpus((uint16_t *)&tmd->length);
 314         le16_to_cpus((uint16_t *)&tmd->status);
 315         le32_to_cpus(&tmd->misc);
 316         le32_to_cpus(&tmd->res);
 317         if (BCR_SWSTYLE(s) == 3) {
 318             uint32_t tmp = tmd->tbadr;
 319             tmd->tbadr = tmd->misc;
 320             tmd->misc = tmp;
 321         }
 322     }
 323 }
 324
 325 static inline void pcnet_tmd_store(PCNetState *s, const struct pcnet_TMD *tmd,
 326                                    hwaddr addr)
 327 {
 328     if (!BCR_SSIZE32(s)) {
 329         struct {
 330             uint32_t tbadr;
 331             int16_t length;
 332             int16_t status;
 333         } xda;
 334         xda.tbadr = cpu_to_le32((tmd->tbadr & 0xffffff) |
 335                                 ((tmd->status & 0xff00) << 16));
 336         xda.length = cpu_to_le16(tmd->length);
 337         xda.status = cpu_to_le16(tmd->misc >> 16);
 338         s->phys_mem_write(s->dma_opaque, addr, (void *)&xda, sizeof(xda), 0);
 339     } else {
 340         struct {
 341             uint32_t tbadr;
 342             int16_t length;
 343             int16_t status;
 344             uint32_t misc;
 345             uint32_t res;
 346         } xda;
 347         xda.tbadr = cpu_to_le32(tmd->tbadr);
 348         xda.length = cpu_to_le16(tmd->length);
 349         xda.status = cpu_to_le16(tmd->status);
 350         xda.misc = cpu_to_le32(tmd->misc);
 351         xda.res = cpu_to_le32(tmd->res);
 352         if (BCR_SWSTYLE(s) == 3) {
 353             uint32_t tmp = xda.tbadr;
 354             xda.tbadr = xda.misc;
 355             xda.misc = tmp;
 356         }
 357         s->phys_mem_write(s->dma_opaque, addr, (void *)&xda, sizeof(xda), 0);
 358     }
 359 }
 360
 361 static inline void pcnet_rmd_load(PCNetState *s, struct pcnet_RMD *rmd,
 362                                   hwaddr addr)
 363 {
 364     if (!BCR_SSIZE32(s)) {
 365         struct {
 366             uint32_t rbadr;
 367             int16_t buf_length;
 368             int16_t msg_length;
 369         } rda;
 370         s->phys_mem_read(s->dma_opaque, addr, (void *)&rda, sizeof(rda), 0);
 371         rmd->rbadr = le32_to_cpu(rda.rbadr) & 0xffffff;
 372         rmd->buf_length = le16_to_cpu(rda.buf_length);
 373         rmd->status = (le32_to_cpu(rda.rbadr) >> 16) & 0xff00;
 374         rmd->msg_length = le16_to_cpu(rda.msg_length);
 375         rmd->res = 0;
 376     } else {
 377         s->phys_mem_read(s->dma_opaque, addr, (void *)rmd, sizeof(*rmd), 0);
 378         le32_to_cpus(&rmd->rbadr);
 379         le16_to_cpus((uint16_t *)&rmd->buf_length);
 380         le16_to_cpus((uint16_t *)&rmd->status);
 381         le32_to_cpus(&rmd->msg_length);
 382         le32_to_cpus(&rmd->res);
 383         if (BCR_SWSTYLE(s) == 3) {
 384             uint32_t tmp = rmd->rbadr;
 385             rmd->rbadr = rmd->msg_length;
 386             rmd->msg_length = tmp;
 387         }
 388     }
 389 }
 390
 391 static inline void pcnet_rmd_store(PCNetState *s, struct pcnet_RMD *rmd,
 392                                    hwaddr addr)
 393 {
 394     if (!BCR_SSIZE32(s)) {
 395         struct {
 396             uint32_t rbadr;
 397             int16_t buf_length;
 398             int16_t msg_length;
 399         } rda;
 400         rda.rbadr = cpu_to_le32((rmd->rbadr & 0xffffff) |
 401                                 ((rmd->status & 0xff00) << 16));
 402         rda.buf_length = cpu_to_le16(rmd->buf_length);
 403         rda.msg_length = cpu_to_le16(rmd->msg_length);
 404         s->phys_mem_write(s->dma_opaque, addr, (void *)&rda, sizeof(rda), 0);
 405     } else {
 406         struct {
 407             uint32_t rbadr;
 408             int16_t buf_length;
 409             int16_t status;
 410             uint32_t msg_length;
 411             uint32_t res;
 412         } rda;
 413         rda.rbadr = cpu_to_le32(rmd->rbadr);
 414         rda.buf_length = cpu_to_le16(rmd->buf_length);
 415         rda.status = cpu_to_le16(rmd->status);
 416         rda.msg_length = cpu_to_le32(rmd->msg_length);
 417         rda.res = cpu_to_le32(rmd->res);
 418         if (BCR_SWSTYLE(s) == 3) {
 419             uint32_t tmp = rda.rbadr;
 420             rda.rbadr = rda.msg_length;
 421             rda.msg_length = tmp;
 422         }
 423         s->phys_mem_write(s->dma_opaque, addr, (void *)&rda, sizeof(rda), 0);
 424     }
 425 }
 426
 427
 428 #define TMDLOAD(TMD,ADDR) pcnet_tmd_load(s,TMD,ADDR)
 429
 430 #define TMDSTORE(TMD,ADDR) pcnet_tmd_store(s,TMD,ADDR)
 431
 432 #define RMDLOAD(RMD,ADDR) pcnet_rmd_load(s,RMD,ADDR)
 433
 434 #define RMDSTORE(RMD,ADDR) pcnet_rmd_store(s,RMD,ADDR)
 435
 436 #if 1
 437
 438 #define CHECK_RMD(ADDR,RES) do {                \
 439     struct pcnet_RMD rmd;                       \
 440     RMDLOAD(&rmd,(ADDR));                       \
 441     (RES) |= (GET_FIELD(rmd.buf_length, RMDL, ONES) != 15) \
 442           || (GET_FIELD(rmd.msg_length, RMDM, ZEROS) != 0); \
 443 } while (0)
 444
 445 #define CHECK_TMD(ADDR,RES) do {                \
 446     struct pcnet_TMD tmd;                       \
 447     TMDLOAD(&tmd,(ADDR));                       \
 448     (RES) |= (GET_FIELD(tmd.length, TMDL, ONES) != 15); \
 449 } while (0)
 450
 451 #else
 452
 453 #define CHECK_RMD(ADDR,RES) do {                \
 454     switch (BCR_SWSTYLE(s)) {                   \
 455     case 0x00:                                  \
 456         do {                                    \
 457             uint16_t rda[4];                    \
 458             s->phys_mem_read(s->dma_opaque, (ADDR), \
 459                 (void *)&rda[0], sizeof(rda), 0); \
 460             (RES) |= (rda[2] & 0xf000)!=0xf000; \
 461             (RES) |= (rda[3] & 0xf000)!=0x0000; \
 462         } while (0);                            \
 463         break;                                  \
 464     case 0x01:                                  \
 465     case 0x02:                                  \
 466         do {                                    \
 467             uint32_t rda[4];                    \
 468             s->phys_mem_read(s->dma_opaque, (ADDR), \
 469                 (void *)&rda[0], sizeof(rda), 0); \
 470             (RES) |= (rda[1] & 0x0000f000L)!=0x0000f000L; \
 471             (RES) |= (rda[2] & 0x0000f000L)!=0x00000000L; \
 472         } while (0);                            \
 473         break;                                  \
 474     case 0x03:                                  \
 475         do {                                    \
 476             uint32_t rda[4];                    \
 477             s->phys_mem_read(s->dma_opaque, (ADDR), \
 478                 (void *)&rda[0], sizeof(rda), 0); \
 479             (RES) |= (rda[0] & 0x0000f000L)!=0x00000000L; \
 480             (RES) |= (rda[1] & 0x0000f000L)!=0x0000f000L; \
 481         } while (0);                            \
 482         break;                                  \
 483     }                                           \
 484 } while (0)
 485
 486 #define CHECK_TMD(ADDR,RES) do {                \
 487     switch (BCR_SWSTYLE(s)) {                   \
 488     case 0x00:                                  \
 489         do {                                    \
 490             uint16_t xda[4];                    \
 491             s->phys_mem_read(s->dma_opaque, (ADDR), \
 492                 (void *)&xda[0], sizeof(xda), 0); \
 493             (RES) |= (xda[2] & 0xf000)!=0xf000; \
 494         } while (0);                            \
 495         break;                                  \
 496     case 0x01:                                  \
 497     case 0x02:                                  \
 498     case 0x03:                                  \
 499         do {                                    \
 500             uint32_t xda[4];                    \
 501             s->phys_mem_read(s->dma_opaque, (ADDR), \
 502                 (void *)&xda[0], sizeof(xda), 0); \
 503             (RES) |= (xda[1] & 0x0000f000L)!=0x0000f000L; \
 504         } while (0);                            \
 505         break;                                  \
 506     }                                           \
 507 } while (0)
 508
 509 #endif
 510
 511 #define PRINT_PKTHDR(BUF) do {                  \
 512     struct qemu_ether_header *hdr = (void *)(BUF); \
 513     printf("packet dhost=%02x:%02x:%02x:%02x:%02x:%02x, " \
 514            "shost=%02x:%02x:%02x:%02x:%02x:%02x, " \
 515            "type=0x%04x\n",                     \
 516            hdr->ether_dhost[0],hdr->ether_dhost[1],hdr->ether_dhost[2], \
 517            hdr->ether_dhost[3],hdr->ether_dhost[4],hdr->ether_dhost[5], \
 518            hdr->ether_shost[0],hdr->ether_shost[1],hdr->ether_shost[2], \
 519            hdr->ether_shost[3],hdr->ether_shost[4],hdr->ether_shost[5], \
 520            be16_to_cpu(hdr->ether_type));       \
 521 } while (0)
 522
 523 #define MULTICAST_FILTER_LEN 8
 524
 525 static inline uint32_t lnc_mchash(const uint8_t *ether_addr)
 526 {
 527 #define LNC_POLYNOMIAL          0xEDB88320UL
 528     uint32_t crc = 0xFFFFFFFF;
 529     int idx, bit;
 530     uint8_t data;
 531
 532     for (idx = 0; idx < 6; idx++) {
 533         for (data = *ether_addr++, bit = 0; bit < MULTICAST_FILTER_LEN; bit++) {
 534             crc = (crc >> 1) ^ (((crc ^ data) & 1) ? LNC_POLYNOMIAL : 0);
 535             data >>= 1;
 536         }
 537     }
 538     return crc;
 539 #undef LNC_POLYNOMIAL
 540 }
 541
 542 #define CRC(crc, ch)     (crc = (crc >> 8) ^ crctab[(crc ^ (ch)) & 0xff])
 543
 544 /* generated using the AUTODIN II polynomial
 545  *      x^32 + x^26 + x^23 + x^22 + x^16 +
 546  *      x^12 + x^11 + x^10 + x^8 + x^7 + x^5 + x^4 + x^2 + x^1 + 1
 547  */
 548 static const uint32_t crctab[256] = {
 549         0x00000000, 0x77073096, 0xee0e612c, 0x990951ba,
 550         0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
 551         0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
 552         0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
 553         0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
 554         0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
 555         0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,
 556         0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
 557         0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
 558         0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
 559         0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940,
 560         0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
 561         0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116,
 562         0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
 563         0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
 564         0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
 565         0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a,
 566         0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
 567         0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818,
 568         0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
 569         0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
 570         0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
 571         0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c,
 572         0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
 573         0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
 574         0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
 575         0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
 576         0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
 577         0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086,
 578         0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
 579         0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4,
 580         0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
 581         0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
 582         0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
 583         0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
 584         0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
 585         0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe,
 586         0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
 587         0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
 588         0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
 589         0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252,
 590         0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
 591         0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60,
 592         0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
 593         0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
 594         0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
 595         0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04,
 596         0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
 597         0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a,
 598         0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
 599         0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
 600         0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
 601         0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e,
 602         0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
 603         0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
 604         0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
 605         0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
 606         0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
 607         0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0,
 608         0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
 609         0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6,
 610         0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
 611         0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
 612         0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d,
 613 };
 614
 615 static inline int padr_match(PCNetState *s, const uint8_t *buf, int size)
 616 {
 617     struct qemu_ether_header *hdr = (void *)buf;
 618     uint8_t padr[6] = {
 619         s->csr[12] & 0xff, s->csr[12] >> 8,
 620         s->csr[13] & 0xff, s->csr[13] >> 8,
 621         s->csr[14] & 0xff, s->csr[14] >> 8
 622     };
 623     int result = (!CSR_DRCVPA(s)) && !memcmp(hdr->ether_dhost, padr, 6);
 624 #ifdef PCNET_DEBUG_MATCH
 625     printf("packet dhost=%02x:%02x:%02x:%02x:%02x:%02x, "
 626            "padr=%02x:%02x:%02x:%02x:%02x:%02x\n",
 627            hdr->ether_dhost[0],hdr->ether_dhost[1],hdr->ether_dhost[2],
 628            hdr->ether_dhost[3],hdr->ether_dhost[4],hdr->ether_dhost[5],
 629            padr[0],padr[1],padr[2],padr[3],padr[4],padr[5]);
 630     printf("padr_match result=%d\n", result);
 631 #endif
 632     return result;
 633 }
 634
 635 static inline int padr_bcast(PCNetState *s, const uint8_t *buf, int size)
 636 {
 637     static const uint8_t BCAST[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 638     struct qemu_ether_header *hdr = (void *)buf;
 639     int result = !CSR_DRCVBC(s) && !memcmp(hdr->ether_dhost, BCAST, 6);
 640 #ifdef PCNET_DEBUG_MATCH
 641     printf("padr_bcast result=%d\n", result);
 642 #endif
 643     return result;
 644 }
 645
 646 static inline int ladr_match(PCNetState *s, const uint8_t *buf, int size)
 647 {
 648     struct qemu_ether_header *hdr = (void *)buf;
 649     if ((*(hdr->ether_dhost)&0x01) &&
 650         ((uint64_t *)&s->csr[8])[0] != 0LL) {
 651         uint8_t ladr[8] = {
 652             s->csr[8] & 0xff, s->csr[8] >> 8,
 653             s->csr[9] & 0xff, s->csr[9] >> 8,
 654             s->csr[10] & 0xff, s->csr[10] >> 8,
 655             s->csr[11] & 0xff, s->csr[11] >> 8
 656         };
 657         int index = lnc_mchash(hdr->ether_dhost) >> 26;
 658         return !!(ladr[index >> 3] & (1 << (index & 7)));
 659     }
 660     return 0;
 661 }
 662
 663 static inline hwaddr pcnet_rdra_addr(PCNetState *s, int idx)
 664 {
 665     while (idx < 1) idx += CSR_RCVRL(s);
 666     return s->rdra + ((CSR_RCVRL(s) - idx) * (BCR_SWSTYLE(s) ? 16 : 8));
 667 }
 668
 669 static inline int64_t pcnet_get_next_poll_time(PCNetState *s, int64_t current_time)
 670 {
 671     int64_t next_time = current_time +
 672         muldiv64(65536 - (CSR_SPND(s) ? 0 : CSR_POLL(s)),
 673                  get_ticks_per_sec(), 33000000L);
 674     if (next_time <= current_time)
 675         next_time = current_time + 1;
 676     return next_time;
 677 }
 678
 679 static void pcnet_poll(PCNetState *s);
 680 static void pcnet_poll_timer(void *opaque);
 681
 682 static uint32_t pcnet_csr_readw(PCNetState *s, uint32_t rap);
 683 static void pcnet_csr_writew(PCNetState *s, uint32_t rap, uint32_t new_value);
 684 static void pcnet_bcr_writew(PCNetState *s, uint32_t rap, uint32_t val);
 685
 686 static void pcnet_s_reset(PCNetState *s)
 687 {
 688 #ifdef PCNET_DEBUG
 689     printf("pcnet_s_reset\n");
 690 #endif
 691
 692     s->rdra = 0;
 693     s->tdra = 0;
 694     s->rap = 0;
 695
 696     s->bcr[BCR_BSBC] &= ~0x0080;
 697
 698     s->csr[0]   = 0x0004;
 699     s->csr[3]   = 0x0000;
 700     s->csr[4]   = 0x0115;
 701     s->csr[5]   = 0x0000;
 702     s->csr[6]   = 0x0000;
 703     s->csr[8]   = 0;
 704     s->csr[9]   = 0;
 705     s->csr[10]  = 0;
 706     s->csr[11]  = 0;
 707     s->csr[12]  = le16_to_cpu(((uint16_t *)&s->prom[0])[0]);
 708     s->csr[13]  = le16_to_cpu(((uint16_t *)&s->prom[0])[1]);
 709     s->csr[14]  = le16_to_cpu(((uint16_t *)&s->prom[0])[2]);
 710     s->csr[15] &= 0x21c4;
 711     s->csr[72]  = 1;
 712     s->csr[74]  = 1;
 713     s->csr[76]  = 1;
 714     s->csr[78]  = 1;
 715     s->csr[80]  = 0x1410;
 716     s->csr[88]  = 0x1003;
 717     s->csr[89]  = 0x0262;
 718     s->csr[94]  = 0x0000;
 719     s->csr[100] = 0x0200;
 720     s->csr[103] = 0x0105;
 721     s->csr[103] = 0x0105;
 722     s->csr[112] = 0x0000;
 723     s->csr[114] = 0x0000;
 724     s->csr[122] = 0x0000;
 725     s->csr[124] = 0x0000;
 726
 727     s->tx_busy = 0;
 728 }
 729
 730 static void pcnet_update_irq(PCNetState *s)
 731 {
 732     int isr = 0;
 733     s->csr[0] &= ~0x0080;
 734
 735 #if 1
 736     if (((s->csr[0] & ~s->csr[3]) & 0x5f00) ||
 737         (((s->csr[4]>>1) & ~s->csr[4]) & 0x0115) ||
 738         (((s->csr[5]>>1) & s->csr[5]) & 0x0048))
 739 #else
 740     if ((!(s->csr[3] & 0x4000) && !!(s->csr[0] & 0x4000)) /* BABL */ ||
 741         (!(s->csr[3] & 0x1000) && !!(s->csr[0] & 0x1000)) /* MISS */ ||
 742         (!(s->csr[3] & 0x0100) && !!(s->csr[0] & 0x0100)) /* IDON */ ||
 743         (!(s->csr[3] & 0x0200) && !!(s->csr[0] & 0x0200)) /* TINT */ ||
 744         (!(s->csr[3] & 0x0400) && !!(s->csr[0] & 0x0400)) /* RINT */ ||
 745         (!(s->csr[3] & 0x0800) && !!(s->csr[0] & 0x0800)) /* MERR */ ||
 746         (!(s->csr[4] & 0x0001) && !!(s->csr[4] & 0x0002)) /* JAB */ ||
 747         (!(s->csr[4] & 0x0004) && !!(s->csr[4] & 0x0008)) /* TXSTRT */ ||
 748         (!(s->csr[4] & 0x0010) && !!(s->csr[4] & 0x0020)) /* RCVO */ ||
 749         (!(s->csr[4] & 0x0100) && !!(s->csr[4] & 0x0200)) /* MFCO */ ||
 750         (!!(s->csr[5] & 0x0040) && !!(s->csr[5] & 0x0080)) /* EXDINT */ ||
 751         (!!(s->csr[5] & 0x0008) && !!(s->csr[5] & 0x0010)) /* MPINT */)
 752 #endif
 753     {
 754
 755         isr = CSR_INEA(s);
 756         s->csr[0] |= 0x0080;
 757     }
 758
 759     if (!!(s->csr[4] & 0x0080) && CSR_INEA(s)) { /* UINT */
 760         s->csr[4] &= ~0x0080;
 761         s->csr[4] |= 0x0040;
 762         s->csr[0] |= 0x0080;
 763         isr = 1;
 764 #ifdef PCNET_DEBUG
 765         printf("pcnet user int\n");
 766 #endif
 767     }
 768
 769 #if 1
 770     if (((s->csr[5]>>1) & s->csr[5]) & 0x0500)
 771 #else
 772     if ((!!(s->csr[5] & 0x0400) && !!(s->csr[5] & 0x0800)) /* SINT */ ||
 773         (!!(s->csr[5] & 0x0100) && !!(s->csr[5] & 0x0200)) /* SLPINT */ )
 774 #endif
 775     {
 776         isr = 1;
 777         s->csr[0] |= 0x0080;
 778     }
 779
 780     if (isr != s->isr) {
 781 #ifdef PCNET_DEBUG
 782         printf("pcnet: INTA=%d\n", isr);
 783 #endif
 784     }
 785     qemu_set_irq(s->irq, isr);
 786     s->isr = isr;
 787 }
 788
 789 static void pcnet_init(PCNetState *s)
 790 {
 791     int rlen, tlen;
 792     uint16_t padr[3], ladrf[4], mode;
 793     uint32_t rdra, tdra;
 794
 795 #ifdef PCNET_DEBUG
 796     printf("pcnet_init init_addr=0x%08x\n", PHYSADDR(s,CSR_IADR(s)));
 797 #endif
 798
 799     if (BCR_SSIZE32(s)) {
 800         struct pcnet_initblk32 initblk;
 801         s->phys_mem_read(s->dma_opaque, PHYSADDR(s,CSR_IADR(s)),
 802                 (uint8_t *)&initblk, sizeof(initblk), 0);
 803         mode = le16_to_cpu(initblk.mode);
 804         rlen = initblk.rlen >> 4;
 805         tlen = initblk.tlen >> 4;
 806         ladrf[0] = le16_to_cpu(initblk.ladrf[0]);
 807         ladrf[1] = le16_to_cpu(initblk.ladrf[1]);
 808         ladrf[2] = le16_to_cpu(initblk.ladrf[2]);
 809         ladrf[3] = le16_to_cpu(initblk.ladrf[3]);
 810         padr[0] = le16_to_cpu(initblk.padr[0]);
 811         padr[1] = le16_to_cpu(initblk.padr[1]);
 812         padr[2] = le16_to_cpu(initblk.padr[2]);
 813         rdra = le32_to_cpu(initblk.rdra);
 814         tdra = le32_to_cpu(initblk.tdra);
 815     } else {
 816         struct pcnet_initblk16 initblk;
 817         s->phys_mem_read(s->dma_opaque, PHYSADDR(s,CSR_IADR(s)),
 818                 (uint8_t *)&initblk, sizeof(initblk), 0);
 819         mode = le16_to_cpu(initblk.mode);
 820         ladrf[0] = le16_to_cpu(initblk.ladrf[0]);
 821         ladrf[1] = le16_to_cpu(initblk.ladrf[1]);
 822         ladrf[2] = le16_to_cpu(initblk.ladrf[2]);
 823         ladrf[3] = le16_to_cpu(initblk.ladrf[3]);
 824         padr[0] = le16_to_cpu(initblk.padr[0]);
 825         padr[1] = le16_to_cpu(initblk.padr[1]);
 826         padr[2] = le16_to_cpu(initblk.padr[2]);
 827         rdra = le32_to_cpu(initblk.rdra);
 828         tdra = le32_to_cpu(initblk.tdra);
 829         rlen = rdra >> 29;
 830         tlen = tdra >> 29;
 831         rdra &= 0x00ffffff;
 832         tdra &= 0x00ffffff;
 833     }
 834
 835 #if defined(PCNET_DEBUG)
 836     printf("rlen=%d tlen=%d\n", rlen, tlen);
 837 #endif
 838
 839     CSR_RCVRL(s) = (rlen < 9) ? (1 << rlen) : 512;
 840     CSR_XMTRL(s) = (tlen < 9) ? (1 << tlen) : 512;
 841     s->csr[ 6] = (tlen << 12) | (rlen << 8);
 842     s->csr[15] = mode;
 843     s->csr[ 8] = ladrf[0];
 844     s->csr[ 9] = ladrf[1];
 845     s->csr[10] = ladrf[2];
 846     s->csr[11] = ladrf[3];
 847     s->csr[12] = padr[0];
 848     s->csr[13] = padr[1];
 849     s->csr[14] = padr[2];
 850     s->rdra = PHYSADDR(s, rdra);
 851     s->tdra = PHYSADDR(s, tdra);
 852
 853     CSR_RCVRC(s) = CSR_RCVRL(s);
 854     CSR_XMTRC(s) = CSR_XMTRL(s);
 855
 856 #ifdef PCNET_DEBUG
 857     printf("pcnet ss32=%d rdra=0x%08x[%d] tdra=0x%08x[%d]\n",
 858         BCR_SSIZE32(s),
 859         s->rdra, CSR_RCVRL(s), s->tdra, CSR_XMTRL(s));
 860 #endif
 861
 862     s->csr[0] |= 0x0101;
 863     s->csr[0] &= ~0x0004;       /* clear STOP bit */
 864 }
 865
 866 static void pcnet_start(PCNetState *s)
 867 {
 868 #ifdef PCNET_DEBUG
 869     printf("pcnet_start\n");
 870 #endif
 871
 872     if (!CSR_DTX(s))
 873         s->csr[0] |= 0x0010;    /* set TXON */
 874
 875     if (!CSR_DRX(s))
 876         s->csr[0] |= 0x0020;    /* set RXON */
 877
 878     s->csr[0] &= ~0x0004;       /* clear STOP bit */
 879     s->csr[0] |= 0x0002;
 880     pcnet_poll_timer(s);
 881 }
 882
 883 static void pcnet_stop(PCNetState *s)
 884 {
 885 #ifdef PCNET_DEBUG
 886     printf("pcnet_stop\n");
 887 #endif
 888     s->csr[0] &= ~0xffeb;
 889     s->csr[0] |= 0x0014;
 890     s->csr[4] &= ~0x02c2;
 891     s->csr[5] &= ~0x0011;
 892     pcnet_poll_timer(s);
 893 }
 894
 895 static void pcnet_rdte_poll(PCNetState *s)
 896 {
 897     s->csr[28] = s->csr[29] = 0;
 898     if (s->rdra) {
 899         int bad = 0;
 900 #if 1
 901         hwaddr crda = pcnet_rdra_addr(s, CSR_RCVRC(s));
 902         hwaddr nrda = pcnet_rdra_addr(s, -1 + CSR_RCVRC(s));
 903         hwaddr nnrd = pcnet_rdra_addr(s, -2 + CSR_RCVRC(s));
 904 #else
 905         hwaddr crda = s->rdra +
 906             (CSR_RCVRL(s) - CSR_RCVRC(s)) *
 907             (BCR_SWSTYLE(s) ? 16 : 8 );
 908         int nrdc = CSR_RCVRC(s)<=1 ? CSR_RCVRL(s) : CSR_RCVRC(s)-1;
 909         hwaddr nrda = s->rdra +
 910             (CSR_RCVRL(s) - nrdc) *
 911             (BCR_SWSTYLE(s) ? 16 : 8 );
 912         int nnrc = nrdc<=1 ? CSR_RCVRL(s) : nrdc-1;
 913         hwaddr nnrd = s->rdra +
 914             (CSR_RCVRL(s) - nnrc) *
 915             (BCR_SWSTYLE(s) ? 16 : 8 );
 916 #endif
 917
 918         CHECK_RMD(crda, bad);
 919         if (!bad) {
 920             CHECK_RMD(nrda, bad);
 921             if (bad || (nrda == crda)) nrda = 0;
 922             CHECK_RMD(nnrd, bad);
 923             if (bad || (nnrd == crda)) nnrd = 0;
 924
 925             s->csr[28] = crda & 0xffff;
 926             s->csr[29] = crda >> 16;
 927             s->csr[26] = nrda & 0xffff;
 928             s->csr[27] = nrda >> 16;
 929             s->csr[36] = nnrd & 0xffff;
 930             s->csr[37] = nnrd >> 16;
 931 #ifdef PCNET_DEBUG
 932             if (bad) {
 933                 printf("pcnet: BAD RMD RECORDS AFTER 0x" TARGET_FMT_plx "\n",
 934                        crda);
 935             }
 936         } else {
 937             printf("pcnet: BAD RMD RDA=0x" TARGET_FMT_plx "\n",
 938                    crda);
 939 #endif
 940         }
 941     }
 942
 943     if (CSR_CRDA(s)) {
 944         struct pcnet_RMD rmd;
 945         RMDLOAD(&rmd, PHYSADDR(s,CSR_CRDA(s)));
 946         CSR_CRBC(s) = GET_FIELD(rmd.buf_length, RMDL, BCNT);
 947         CSR_CRST(s) = rmd.status;
 948 #ifdef PCNET_DEBUG_RMD_X
 949         printf("CRDA=0x%08x CRST=0x%04x RCVRC=%d RMDL=0x%04x RMDS=0x%04x RMDM=0x%08x\n",
 950                 PHYSADDR(s,CSR_CRDA(s)), CSR_CRST(s), CSR_RCVRC(s),
 951                 rmd.buf_length, rmd.status, rmd.msg_length);
 952         PRINT_RMD(&rmd);
 953 #endif
 954     } else {
 955         CSR_CRBC(s) = CSR_CRST(s) = 0;
 956     }
 957
 958     if (CSR_NRDA(s)) {
 959         struct pcnet_RMD rmd;
 960         RMDLOAD(&rmd, PHYSADDR(s,CSR_NRDA(s)));
 961         CSR_NRBC(s) = GET_FIELD(rmd.buf_length, RMDL, BCNT);
 962         CSR_NRST(s) = rmd.status;
 963     } else {
 964         CSR_NRBC(s) = CSR_NRST(s) = 0;
 965     }
 966
 967 }
 968
 969 static int pcnet_tdte_poll(PCNetState *s)
 970 {
 971     s->csr[34] = s->csr[35] = 0;
 972     if (s->tdra) {
 973         hwaddr cxda = s->tdra +
 974             (CSR_XMTRL(s) - CSR_XMTRC(s)) *
 975             (BCR_SWSTYLE(s) ? 16 : 8);
 976         int bad = 0;
 977         CHECK_TMD(cxda, bad);
 978         if (!bad) {
 979             if (CSR_CXDA(s) != cxda) {
 980                 s->csr[60] = s->csr[34];
 981                 s->csr[61] = s->csr[35];
 982                 s->csr[62] = CSR_CXBC(s);
 983                 s->csr[63] = CSR_CXST(s);
 984             }
 985             s->csr[34] = cxda & 0xffff;
 986             s->csr[35] = cxda >> 16;
 987 #ifdef PCNET_DEBUG_X
 988             printf("pcnet: BAD TMD XDA=0x%08x\n", cxda);
 989 #endif
 990         }
 991     }
 992
 993     if (CSR_CXDA(s)) {
 994         struct pcnet_TMD tmd;
 995
 996         TMDLOAD(&tmd, PHYSADDR(s,CSR_CXDA(s)));
 997
 998         CSR_CXBC(s) = GET_FIELD(tmd.length, TMDL, BCNT);
 999         CSR_CXST(s) = tmd.status;
1000     } else {
1001         CSR_CXBC(s) = CSR_CXST(s) = 0;
1002     }
1003
1004     return !!(CSR_CXST(s) & 0x8000);
1005 }
1006
1007 int pcnet_can_receive(NetClientState *nc)
1008 {
1009     PCNetState *s = qemu_get_nic_opaque(nc);
1010     if (CSR_STOP(s) || CSR_SPND(s))
1011         return 0;
1012
1013     return sizeof(s->buffer)-16;
1014 }
1015
1016 #define MIN_BUF_SIZE 60
1017
1018 ssize_t pcnet_receive(NetClientState *nc, const uint8_t *buf, size_t size_)
1019 {
1020     PCNetState *s = qemu_get_nic_opaque(nc);
1021     int is_padr = 0, is_bcast = 0, is_ladr = 0;
1022     uint8_t buf1[60];
1023     int remaining;
1024     int crc_err = 0;
1025     int size = size_;
1026
1027     if (CSR_DRX(s) || CSR_STOP(s) || CSR_SPND(s) || !size ||
1028         (CSR_LOOP(s) && !s->looptest)) {
1029         return -1;
1030     }
1031 #ifdef PCNET_DEBUG
1032     printf("pcnet_receive size=%d\n", size);
1033 #endif
1034
1035     /* if too small buffer, then expand it */
1036     if (size < MIN_BUF_SIZE) {
1037         memcpy(buf1, buf, size);
1038         memset(buf1 + size, 0, MIN_BUF_SIZE - size);
1039         buf = buf1;
1040         size = MIN_BUF_SIZE;
1041     }
1042
1043     if (CSR_PROM(s)
1044         || (is_padr=padr_match(s, buf, size))
1045         || (is_bcast=padr_bcast(s, buf, size))
1046         || (is_ladr=ladr_match(s, buf, size))) {
1047
1048         pcnet_rdte_poll(s);
1049
1050         if (!(CSR_CRST(s) & 0x8000) && s->rdra) {
1051             struct pcnet_RMD rmd;
1052             int rcvrc = CSR_RCVRC(s)-1,i;
1053             hwaddr nrda;
1054             for (i = CSR_RCVRL(s)-1; i > 0; i--, rcvrc--) {
1055                 if (rcvrc <= 1)
1056                     rcvrc = CSR_RCVRL(s);
1057                 nrda = s->rdra +
1058                     (CSR_RCVRL(s) - rcvrc) *
1059                     (BCR_SWSTYLE(s) ? 16 : 8 );
1060                 RMDLOAD(&rmd, nrda);
1061                 if (GET_FIELD(rmd.status, RMDS, OWN)) {
1062 #ifdef PCNET_DEBUG_RMD
1063                     printf("pcnet - scan buffer: RCVRC=%d PREV_RCVRC=%d\n",
1064                                 rcvrc, CSR_RCVRC(s));
1065 #endif
1066                     CSR_RCVRC(s) = rcvrc;
1067                     pcnet_rdte_poll(s);
1068                     break;
1069                 }
1070             }
1071         }
1072
1073         if (!(CSR_CRST(s) & 0x8000)) {
1074 #ifdef PCNET_DEBUG_RMD
1075             printf("pcnet - no buffer: RCVRC=%d\n", CSR_RCVRC(s));
1076 #endif
1077             s->csr[0] |= 0x1000; /* Set MISS flag */
1078             CSR_MISSC(s)++;
1079         } else {
1080             uint8_t *src = s->buffer;
1081             hwaddr crda = CSR_CRDA(s);
1082             struct pcnet_RMD rmd;
1083             int pktcount = 0;
1084
1085             if (!s->looptest) {
1086                 memcpy(src, buf, size);
1087                 /* no need to compute the CRC */
1088                 src[size] = 0;
1089                 src[size + 1] = 0;
1090                 src[size + 2] = 0;
1091                 src[size + 3] = 0;
1092                 size += 4;
1093             } else if (s->looptest == PCNET_LOOPTEST_CRC ||
1094                        !CSR_DXMTFCS(s) || size < MIN_BUF_SIZE+4) {
1095                 uint32_t fcs = ~0;
1096                 uint8_t *p = src;
1097
1098                 while (p != &src[size])
1099                     CRC(fcs, *p++);
1100                 *(uint32_t *)p = htonl(fcs);
1101                 size += 4;
1102             } else {
1103                 uint32_t fcs = ~0;
1104                 uint8_t *p = src;
1105
1106                 while (p != &src[size-4])
1107                     CRC(fcs, *p++);
1108                 crc_err = (*(uint32_t *)p != htonl(fcs));
1109             }
1110
1111 #ifdef PCNET_DEBUG_MATCH
1112             PRINT_PKTHDR(buf);
1113 #endif
1114
1115             RMDLOAD(&rmd, PHYSADDR(s,crda));
1116             /*if (!CSR_LAPPEN(s))*/
1117                 SET_FIELD(&rmd.status, RMDS, STP, 1);
1118
1119 #define PCNET_RECV_STORE() do {                                 \
1120     int count = MIN(4096 - GET_FIELD(rmd.buf_length, RMDL, BCNT),remaining); \
1121     hwaddr rbadr = PHYSADDR(s, rmd.rbadr);          \
1122     s->phys_mem_write(s->dma_opaque, rbadr, src, count, CSR_BSWP(s)); \
1123     src += count; remaining -= count;                           \
1124     SET_FIELD(&rmd.status, RMDS, OWN, 0);                       \
1125     RMDSTORE(&rmd, PHYSADDR(s,crda));                           \
1126     pktcount++;                                                 \
1127 } while (0)
1128
1129             remaining = size;
1130             PCNET_RECV_STORE();
1131             if ((remaining > 0) && CSR_NRDA(s)) {
1132                 hwaddr nrda = CSR_NRDA(s);
1133 #ifdef PCNET_DEBUG_RMD
1134                 PRINT_RMD(&rmd);
1135 #endif
1136                 RMDLOAD(&rmd, PHYSADDR(s,nrda));
1137                 if (GET_FIELD(rmd.status, RMDS, OWN)) {
1138                     crda = nrda;
1139                     PCNET_RECV_STORE();
1140 #ifdef PCNET_DEBUG_RMD
1141                     PRINT_RMD(&rmd);
1142 #endif
1143                     if ((remaining > 0) && (nrda=CSR_NNRD(s))) {
1144                         RMDLOAD(&rmd, PHYSADDR(s,nrda));
1145                         if (GET_FIELD(rmd.status, RMDS, OWN)) {
1146                             crda = nrda;
1147                             PCNET_RECV_STORE();
1148                         }
1149                     }
1150                 }
1151             }
1152
1153 #undef PCNET_RECV_STORE
1154
1155             RMDLOAD(&rmd, PHYSADDR(s,crda));
1156             if (remaining == 0) {
1157                 SET_FIELD(&rmd.msg_length, RMDM, MCNT, size);
1158                 SET_FIELD(&rmd.status, RMDS, ENP, 1);
1159                 SET_FIELD(&rmd.status, RMDS, PAM, !CSR_PROM(s) && is_padr);
1160                 SET_FIELD(&rmd.status, RMDS, LFAM, !CSR_PROM(s) && is_ladr);
1161                 SET_FIELD(&rmd.status, RMDS, BAM, !CSR_PROM(s) && is_bcast);
1162                 if (crc_err) {
1163                     SET_FIELD(&rmd.status, RMDS, CRC, 1);
1164                     SET_FIELD(&rmd.status, RMDS, ERR, 1);
1165                 }
1166             } else {
1167                 SET_FIELD(&rmd.status, RMDS, OFLO, 1);
1168                 SET_FIELD(&rmd.status, RMDS, BUFF, 1);
1169                 SET_FIELD(&rmd.status, RMDS, ERR, 1);
1170             }
1171             RMDSTORE(&rmd, PHYSADDR(s,crda));
1172             s->csr[0] |= 0x0400;
1173
1174 #ifdef PCNET_DEBUG
1175             printf("RCVRC=%d CRDA=0x%08x BLKS=%d\n",
1176                 CSR_RCVRC(s), PHYSADDR(s,CSR_CRDA(s)), pktcount);
1177 #endif
1178 #ifdef PCNET_DEBUG_RMD
1179             PRINT_RMD(&rmd);
1180 #endif
1181
1182             while (pktcount--) {
1183                 if (CSR_RCVRC(s) <= 1)
1184                     CSR_RCVRC(s) = CSR_RCVRL(s);
1185                 else
1186                     CSR_RCVRC(s)--;
1187             }
1188
1189             pcnet_rdte_poll(s);
1190
1191         }
1192     }
1193
1194     pcnet_poll(s);
1195     pcnet_update_irq(s);
1196
1197     return size_;
1198 }
1199
1200 void pcnet_set_link_status(NetClientState *nc)
1201 {
1202     PCNetState *d = qemu_get_nic_opaque(nc);
1203
1204     d->lnkst = nc->link_down ? 0 : 0x40;
1205 }
1206
1207 static void pcnet_transmit(PCNetState *s)
1208 {
1209     hwaddr xmit_cxda = 0;
1210     int count = CSR_XMTRL(s)-1;
1211     int add_crc = 0;
1212
1213     s->xmit_pos = -1;
1214
1215     if (!CSR_TXON(s)) {
1216         s->csr[0] &= ~0x0008;
1217         return;
1218     }
1219
1220     s->tx_busy = 1;
1221
1222     txagain:
1223     if (pcnet_tdte_poll(s)) {
1224         struct pcnet_TMD tmd;
1225
1226         TMDLOAD(&tmd, PHYSADDR(s,CSR_CXDA(s)));
1227
1228 #ifdef PCNET_DEBUG_TMD
1229         printf("  TMDLOAD 0x%08x\n", PHYSADDR(s,CSR_CXDA(s)));
1230         PRINT_TMD(&tmd);
1231 #endif
1232         if (GET_FIELD(tmd.status, TMDS, STP)) {
1233             s->xmit_pos = 0;
1234             xmit_cxda = PHYSADDR(s,CSR_CXDA(s));
1235             if (BCR_SWSTYLE(s) != 1)
1236                 add_crc = GET_FIELD(tmd.status, TMDS, ADDFCS);
1237         }
1238         if (s->lnkst == 0 &&
1239             (!CSR_LOOP(s) || (!CSR_INTL(s) && !BCR_TMAULOOP(s)))) {
1240             SET_FIELD(&tmd.misc, TMDM, LCAR, 1);
1241             SET_FIELD(&tmd.status, TMDS, ERR, 1);
1242             SET_FIELD(&tmd.status, TMDS, OWN, 0);
1243             s->csr[0] |= 0xa000; /* ERR | CERR */
1244             s->xmit_pos = -1;
1245             goto txdone;
1246         }
1247         if (!GET_FIELD(tmd.status, TMDS, ENP)) {
1248             int bcnt = 4096 - GET_FIELD(tmd.length, TMDL, BCNT);
1249             s->phys_mem_read(s->dma_opaque, PHYSADDR(s, tmd.tbadr),
1250                              s->buffer + s->xmit_pos, bcnt, CSR_BSWP(s));
1251             s->xmit_pos += bcnt;
1252         } else if (s->xmit_pos >= 0) {
1253             int bcnt = 4096 - GET_FIELD(tmd.length, TMDL, BCNT);
1254             s->phys_mem_read(s->dma_opaque, PHYSADDR(s, tmd.tbadr),
1255                              s->buffer + s->xmit_pos, bcnt, CSR_BSWP(s));
1256             s->xmit_pos += bcnt;
1257 #ifdef PCNET_DEBUG
1258             printf("pcnet_transmit size=%d\n", s->xmit_pos);
1259 #endif
1260             if (CSR_LOOP(s)) {
1261                 if (BCR_SWSTYLE(s) == 1)
1262                     add_crc = !GET_FIELD(tmd.status, TMDS, NOFCS);
1263                 s->looptest = add_crc ? PCNET_LOOPTEST_CRC : PCNET_LOOPTEST_NOCRC;
1264                 pcnet_receive(qemu_get_queue(s->nic), s->buffer, s->xmit_pos);
1265                 s->looptest = 0;
1266             } else
1267                 if (s->nic)
1268                     qemu_send_packet(qemu_get_queue(s->nic), s->buffer,
1269                                      s->xmit_pos);
1270
1271             s->csr[0] &= ~0x0008;   /* clear TDMD */
1272             s->csr[4] |= 0x0004;    /* set TXSTRT */
1273             s->xmit_pos = -1;
1274         }
1275
1276     txdone:
1277         SET_FIELD(&tmd.status, TMDS, OWN, 0);
1278         TMDSTORE(&tmd, PHYSADDR(s,CSR_CXDA(s)));
1279         if (!CSR_TOKINTD(s) || (CSR_LTINTEN(s) && GET_FIELD(tmd.status, TMDS, LTINT)))
1280             s->csr[0] |= 0x0200;    /* set TINT */
1281
1282         if (CSR_XMTRC(s)<=1)
1283             CSR_XMTRC(s) = CSR_XMTRL(s);
1284         else
1285             CSR_XMTRC(s)--;
1286         if (count--)
1287             goto txagain;
1288
1289     } else
1290     if (s->xmit_pos >= 0) {
1291         struct pcnet_TMD tmd;
1292         TMDLOAD(&tmd, xmit_cxda);
1293         SET_FIELD(&tmd.misc, TMDM, BUFF, 1);
1294         SET_FIELD(&tmd.misc, TMDM, UFLO, 1);
1295         SET_FIELD(&tmd.status, TMDS, ERR, 1);
1296         SET_FIELD(&tmd.status, TMDS, OWN, 0);
1297         TMDSTORE(&tmd, xmit_cxda);
1298         s->csr[0] |= 0x0200;    /* set TINT */
1299         if (!CSR_DXSUFLO(s)) {
1300             s->csr[0] &= ~0x0010;
1301         } else
1302         if (count--)
1303           goto txagain;
1304     }
1305
1306     s->tx_busy = 0;
1307 }
1308
1309 static void pcnet_poll(PCNetState *s)
1310 {
1311     if (CSR_RXON(s)) {
1312         pcnet_rdte_poll(s);
1313     }
1314
1315     if (CSR_TDMD(s) ||
1316         (CSR_TXON(s) && !CSR_DPOLL(s) && pcnet_tdte_poll(s)))
1317     {
1318         /* prevent recursion */
1319         if (s->tx_busy)
1320             return;
1321
1322         pcnet_transmit(s);
1323     }
1324 }
1325
1326 static void pcnet_poll_timer(void *opaque)
1327 {
1328     PCNetState *s = opaque;
1329
1330     qemu_del_timer(s->poll_timer);
1331
1332     if (CSR_TDMD(s)) {
1333         pcnet_transmit(s);
1334     }
1335
1336     pcnet_update_irq(s);
1337
1338     if (!CSR_STOP(s) && !CSR_SPND(s) && !CSR_DPOLL(s)) {
1339         uint64_t now = qemu_get_clock_ns(vm_clock) * 33;
1340         if (!s->timer || !now)
1341             s->timer = now;
1342         else {
1343             uint64_t t = now - s->timer + CSR_POLL(s);
1344             if (t > 0xffffLL) {
1345                 pcnet_poll(s);
1346                 CSR_POLL(s) = CSR_PINT(s);
1347             } else
1348                 CSR_POLL(s) = t;
1349         }
1350         qemu_mod_timer(s->poll_timer,
1351             pcnet_get_next_poll_time(s,qemu_get_clock_ns(vm_clock)));
1352     }
1353 }
1354
1355
1356 static void pcnet_csr_writew(PCNetState *s, uint32_t rap, uint32_t new_value)
1357 {
1358     uint16_t val = new_value;
1359 #ifdef PCNET_DEBUG_CSR
1360     printf("pcnet_csr_writew rap=%d val=0x%04x\n", rap, val);
1361 #endif
1362     switch (rap) {
1363     case 0:
1364         s->csr[0] &= ~(val & 0x7f00); /* Clear any interrupt flags */
1365
1366         s->csr[0] = (s->csr[0] & ~0x0040) | (val & 0x0048);
1367
1368         val = (val & 0x007f) | (s->csr[0] & 0x7f00);
1369
1370         /* IFF STOP, STRT and INIT are set, clear STRT and INIT */
1371         if ((val&7) == 7)
1372           val &= ~3;
1373
1374         if (!CSR_STOP(s) && (val & 4))
1375             pcnet_stop(s);
1376
1377         if (!CSR_INIT(s) && (val & 1))
1378             pcnet_init(s);
1379
1380         if (!CSR_STRT(s) && (val & 2))
1381             pcnet_start(s);
1382
1383         if (CSR_TDMD(s))
1384             pcnet_transmit(s);
1385
1386         return;
1387     case 1:
1388     case 2:
1389     case 8:
1390     case 9:
1391     case 10:
1392     case 11:
1393     case 12:
1394     case 13:
1395     case 14:
1396     case 15:
1397     case 18: /* CRBAL */
1398     case 19: /* CRBAU */
1399     case 20: /* CXBAL */
1400     case 21: /* CXBAU */
1401     case 22: /* NRBAU */
1402     case 23: /* NRBAU */
1403     case 24:
1404     case 25:
1405     case 26:
1406     case 27:
1407     case 28:
1408     case 29:
1409     case 30:
1410     case 31:
1411     case 32:
1412     case 33:
1413     case 34:
1414     case 35:
1415     case 36:
1416     case 37:
1417     case 38:
1418     case 39:
1419     case 40: /* CRBC */
1420     case 41:
1421     case 42: /* CXBC */
1422     case 43:
1423     case 44:
1424     case 45:
1425     case 46: /* POLL */
1426     case 47: /* POLLINT */
1427     case 72:
1428     case 74:
1429     case 76: /* RCVRL */
1430     case 78: /* XMTRL */
1431     case 112:
1432        if (CSR_STOP(s) || CSR_SPND(s))
1433            break;
1434        return;
1435     case 3:
1436         break;
1437     case 4:
1438         s->csr[4] &= ~(val & 0x026a);
1439         val &= ~0x026a; val |= s->csr[4] & 0x026a;
1440         break;
1441     case 5:
1442         s->csr[5] &= ~(val & 0x0a90);
1443         val &= ~0x0a90; val |= s->csr[5] & 0x0a90;
1444         break;
1445     case 16:
1446         pcnet_csr_writew(s,1,val);
1447         return;
1448     case 17:
1449         pcnet_csr_writew(s,2,val);
1450         return;
1451     case 58:
1452         pcnet_bcr_writew(s,BCR_SWS,val);
1453         break;
1454     default:
1455         return;
1456     }
1457     s->csr[rap] = val;
1458 }
1459
1460 static uint32_t pcnet_csr_readw(PCNetState *s, uint32_t rap)
1461 {
1462     uint32_t val;
1463     switch (rap) {
1464     case 0:
1465         pcnet_update_irq(s);
1466         val = s->csr[0];
1467         val |= (val & 0x7800) ? 0x8000 : 0;
1468         break;
1469     case 16:
1470         return pcnet_csr_readw(s,1);
1471     case 17:
1472         return pcnet_csr_readw(s,2);
1473     case 58:
1474         return pcnet_bcr_readw(s,BCR_SWS);
1475     case 88:
1476         val = s->csr[89];
1477         val <<= 16;
1478         val |= s->csr[88];
1479         break;
1480     default:
1481         val = s->csr[rap];
1482     }
1483 #ifdef PCNET_DEBUG_CSR
1484     printf("pcnet_csr_readw rap=%d val=0x%04x\n", rap, val);
1485 #endif
1486     return val;
1487 }
1488
1489 static void pcnet_bcr_writew(PCNetState *s, uint32_t rap, uint32_t val)
1490 {
1491     rap &= 127;
1492 #ifdef PCNET_DEBUG_BCR
1493     printf("pcnet_bcr_writew rap=%d val=0x%04x\n", rap, val);
1494 #endif
1495     switch (rap) {
1496     case BCR_SWS:
1497         if (!(CSR_STOP(s) || CSR_SPND(s)))
1498             return;
1499         val &= ~0x0300;
1500         switch (val & 0x00ff) {
1501         case 0:
1502             val |= 0x0200;
1503             break;
1504         case 1:
1505             val |= 0x0100;
1506             break;
1507         case 2:
1508         case 3:
1509             val |= 0x0300;
1510             break;
1511         default:
1512             printf("Bad SWSTYLE=0x%02x\n", val & 0xff);
1513             val = 0x0200;
1514             break;
1515         }
1516 #ifdef PCNET_DEBUG
1517        printf("BCR_SWS=0x%04x\n", val);
1518 #endif
1519         /* fall through */
1520     case BCR_LNKST:
1521     case BCR_LED1:
1522     case BCR_LED2:
1523     case BCR_LED3:
1524     case BCR_MC:
1525     case BCR_FDC:
1526     case BCR_BSBC:
1527     case BCR_EECAS:
1528     case BCR_PLAT:
1529         s->bcr[rap] = val;
1530         break;
1531     default:
1532         break;
1533     }
1534 }
1535
1536 uint32_t pcnet_bcr_readw(PCNetState *s, uint32_t rap)
1537 {
1538     uint32_t val;
1539     rap &= 127;
1540     switch (rap) {
1541     case BCR_LNKST:
1542     case BCR_LED1:
1543     case BCR_LED2:
1544     case BCR_LED3:
1545         val = s->bcr[rap] & ~0x8000;
1546         val |= (val & 0x017f & s->lnkst) ? 0x8000 : 0;
1547         break;
1548     default:
1549         val = rap < 32 ? s->bcr[rap] : 0;
1550         break;
1551     }
1552 #ifdef PCNET_DEBUG_BCR
1553     printf("pcnet_bcr_readw rap=%d val=0x%04x\n", rap, val);
1554 #endif
1555     return val;
1556 }
1557
1558 void pcnet_h_reset(void *opaque)
1559 {
1560     PCNetState *s = opaque;
1561
1562     s->bcr[BCR_MSRDA] = 0x0005;
1563     s->bcr[BCR_MSWRA] = 0x0005;
1564     s->bcr[BCR_MC   ] = 0x0002;
1565     s->bcr[BCR_LNKST] = 0x00c0;
1566     s->bcr[BCR_LED1 ] = 0x0084;
1567     s->bcr[BCR_LED2 ] = 0x0088;
1568     s->bcr[BCR_LED3 ] = 0x0090;
1569     s->bcr[BCR_FDC  ] = 0x0000;
1570     s->bcr[BCR_BSBC ] = 0x9001;
1571     s->bcr[BCR_EECAS] = 0x0002;
1572     s->bcr[BCR_SWS  ] = 0x0200;
1573     s->bcr[BCR_PLAT ] = 0xff06;
1574
1575     pcnet_s_reset(s);
1576     pcnet_update_irq(s);
1577     pcnet_poll_timer(s);
1578 }
1579
1580 void pcnet_ioport_writew(void *opaque, uint32_t addr, uint32_t val)
1581 {
1582     PCNetState *s = opaque;
1583     pcnet_poll_timer(s);
1584 #ifdef PCNET_DEBUG_IO
1585     printf("pcnet_ioport_writew addr=0x%08x val=0x%04x\n", addr, val);
1586 #endif
1587     if (!BCR_DWIO(s)) {
1588         switch (addr & 0x0f) {
1589         case 0x00: /* RDP */
1590             pcnet_csr_writew(s, s->rap, val);
1591             break;
1592         case 0x02:
1593             s->rap = val & 0x7f;
1594             break;
1595         case 0x06:
1596             pcnet_bcr_writew(s, s->rap, val);
1597             break;
1598         }
1599     }
1600     pcnet_update_irq(s);
1601 }
1602
1603 uint32_t pcnet_ioport_readw(void *opaque, uint32_t addr)
1604 {
1605     PCNetState *s = opaque;
1606     uint32_t val = -1;
1607     pcnet_poll_timer(s);
1608     if (!BCR_DWIO(s)) {
1609         switch (addr & 0x0f) {
1610         case 0x00: /* RDP */
1611             val = pcnet_csr_readw(s, s->rap);
1612             break;
1613         case 0x02:
1614             val = s->rap;
1615             break;
1616         case 0x04:
1617             pcnet_s_reset(s);
1618             val = 0;
1619             break;
1620         case 0x06:
1621             val = pcnet_bcr_readw(s, s->rap);
1622             break;
1623         }
1624     }
1625     pcnet_update_irq(s);
1626 #ifdef PCNET_DEBUG_IO
1627     printf("pcnet_ioport_readw addr=0x%08x val=0x%04x\n", addr, val & 0xffff);
1628 #endif
1629     return val;
1630 }
1631
1632 void pcnet_ioport_writel(void *opaque, uint32_t addr, uint32_t val)
1633 {
1634     PCNetState *s = opaque;
1635     pcnet_poll_timer(s);
1636 #ifdef PCNET_DEBUG_IO
1637     printf("pcnet_ioport_writel addr=0x%08x val=0x%08x\n", addr, val);
1638 #endif
1639     if (BCR_DWIO(s)) {
1640         switch (addr & 0x0f) {
1641         case 0x00: /* RDP */
1642             pcnet_csr_writew(s, s->rap, val & 0xffff);
1643             break;
1644         case 0x04:
1645             s->rap = val & 0x7f;
1646             break;
1647         case 0x0c:
1648             pcnet_bcr_writew(s, s->rap, val & 0xffff);
1649             break;
1650         }
1651     } else
1652     if ((addr & 0x0f) == 0) {
1653         /* switch device to dword i/o mode */
1654         pcnet_bcr_writew(s, BCR_BSBC, pcnet_bcr_readw(s, BCR_BSBC) | 0x0080);
1655 #ifdef PCNET_DEBUG_IO
1656         printf("device switched into dword i/o mode\n");
1657 #endif
1658     }
1659     pcnet_update_irq(s);
1660 }
1661
1662 uint32_t pcnet_ioport_readl(void *opaque, uint32_t addr)
1663 {
1664     PCNetState *s = opaque;
1665     uint32_t val = -1;
1666     pcnet_poll_timer(s);
1667     if (BCR_DWIO(s)) {
1668         switch (addr & 0x0f) {
1669         case 0x00: /* RDP */
1670             val = pcnet_csr_readw(s, s->rap);
1671             break;
1672         case 0x04:
1673             val = s->rap;
1674             break;
1675         case 0x08:
1676             pcnet_s_reset(s);
1677             val = 0;
1678             break;
1679         case 0x0c:
1680             val = pcnet_bcr_readw(s, s->rap);
1681             break;
1682         }
1683     }
1684     pcnet_update_irq(s);
1685 #ifdef PCNET_DEBUG_IO
1686     printf("pcnet_ioport_readl addr=0x%08x val=0x%08x\n", addr, val);
1687 #endif
1688     return val;
1689 }
1690
1691 static bool is_version_2(void *opaque, int version_id)
1692 {
1693     return version_id == 2;
1694 }
1695
1696 const VMStateDescription vmstate_pcnet = {
1697     .name = "pcnet",
1698     .version_id = 3,
1699     .minimum_version_id = 2,
1700     .minimum_version_id_old = 2,
1701     .fields      = (VMStateField []) {
1702         VMSTATE_INT32(rap, PCNetState),
1703         VMSTATE_INT32(isr, PCNetState),
1704         VMSTATE_INT32(lnkst, PCNetState),
1705         VMSTATE_UINT32(rdra, PCNetState),
1706         VMSTATE_UINT32(tdra, PCNetState),
1707         VMSTATE_BUFFER(prom, PCNetState),
1708         VMSTATE_UINT16_ARRAY(csr, PCNetState, 128),
1709         VMSTATE_UINT16_ARRAY(bcr, PCNetState, 32),
1710         VMSTATE_UINT64(timer, PCNetState),
1711         VMSTATE_INT32(xmit_pos, PCNetState),
1712         VMSTATE_BUFFER(buffer, PCNetState),
1713         VMSTATE_UNUSED_TEST(is_version_2, 4),
1714         VMSTATE_INT32(tx_busy, PCNetState),
1715         VMSTATE_TIMER(poll_timer, PCNetState),
1716         VMSTATE_END_OF_LIST()
1717     }
1718 };
1719
1720 void pcnet_common_cleanup(PCNetState *d)
1721 {
1722     d->nic = NULL;
1723 }
1724
1725 int pcnet_common_init(DeviceState *dev, PCNetState *s, NetClientInfo *info)
1726 {
1727     int i;
1728     uint16_t checksum;
1729
1730     s->poll_timer = qemu_new_timer_ns(vm_clock, pcnet_poll_timer, s);
1731
1732     qemu_macaddr_default_if_unset(&s->conf.macaddr);
1733     s->nic = qemu_new_nic(info, &s->conf, object_get_typename(OBJECT(dev)), dev->id, s);
1734     qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a);
1735
1736     add_boot_device_path(s->conf.bootindex, dev, "/ethernet-phy@0");
1737
1738     /* Initialize the PROM */
1739
1740     /*
1741       Datasheet: http://pdfdata.datasheetsite.com/web/24528/AM79C970A.pdf
1742       page 95
1743     */
1744     memcpy(s->prom, s->conf.macaddr.a, 6);
1745     /* Reserved Location: must be 00h */
1746     s->prom[6] = s->prom[7] = 0x00;
1747     /* Reserved Location: must be 00h */
1748     s->prom[8] = 0x00;
1749     /* Hardware ID: must be 11h if compatibility to AMD drivers is desired */
1750     s->prom[9] = 0x11;
1751     /* User programmable space, init with 0 */
1752     s->prom[10] = s->prom[11] = 0x00;
1753     /* LSByte of two-byte checksum, which is the sum of bytes 00h-0Bh
1754        and bytes 0Eh and 0Fh, must therefore be initialized with 0! */
1755     s->prom[12] = s->prom[13] = 0x00;
1756     /* Must be ASCII W (57h) if compatibility to AMD
1757        driver software is desired */
1758     s->prom[14] = s->prom[15] = 0x57;
1759
1760     for (i = 0, checksum = 0; i < 16; i++) {
1761         checksum += s->prom[i];
1762     }
1763     *(uint16_t *)&s->prom[12] = cpu_to_le16(checksum);
1764
1765     s->lnkst = 0x40; /* initial link state: up */
1766
1767     return 0;
1768 }