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vhost-vdpa: remove the unnecessary check in vhost_vdpa_add()
[qemu/kevin.git] / hw / net / pcnet.c
blobdcd3fc49481b46a6d4bb7c726572975d65266e02
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 "qemu/osdep.h"
39 #include "qemu/log.h"
40 #include "hw/irq.h"
41 #include "hw/qdev-properties.h"
42 #include "migration/vmstate.h"
43 #include "net/net.h"
44 #include "net/eth.h"
45 #include "qemu/timer.h"
46 #include "trace.h"
47
48 #include "pcnet.h"
49
50 //#define PCNET_DEBUG
51 //#define PCNET_DEBUG_IO
52 //#define PCNET_DEBUG_BCR
53 //#define PCNET_DEBUG_CSR
54 //#define PCNET_DEBUG_RMD
55 //#define PCNET_DEBUG_TMD
56 //#define PCNET_DEBUG_MATCH
57
58
59 struct qemu_ether_header {
60 uint8_t ether_dhost[6];
61 uint8_t ether_shost[6];
62 uint16_t ether_type;
63 };
64
65 #define CSR_INIT(S) !!(((S)->csr[0])&0x0001)
66 #define CSR_STRT(S) !!(((S)->csr[0])&0x0002)
67 #define CSR_STOP(S) !!(((S)->csr[0])&0x0004)
68 #define CSR_TDMD(S) !!(((S)->csr[0])&0x0008)
69 #define CSR_TXON(S) !!(((S)->csr[0])&0x0010)
70 #define CSR_RXON(S) !!(((S)->csr[0])&0x0020)
71 #define CSR_INEA(S) !!(((S)->csr[0])&0x0040)
72 #define CSR_BSWP(S) !!(((S)->csr[3])&0x0004)
73 #define CSR_LAPPEN(S) !!(((S)->csr[3])&0x0020)
74 #define CSR_DXSUFLO(S) !!(((S)->csr[3])&0x0040)
75 #define CSR_ASTRP_RCV(S) !!(((S)->csr[4])&0x0800)
76 #define CSR_DPOLL(S) !!(((S)->csr[4])&0x1000)
77 #define CSR_SPND(S) !!(((S)->csr[5])&0x0001)
78 #define CSR_LTINTEN(S) !!(((S)->csr[5])&0x4000)
79 #define CSR_TOKINTD(S) !!(((S)->csr[5])&0x8000)
80 #define CSR_DRX(S) !!(((S)->csr[15])&0x0001)
81 #define CSR_DTX(S) !!(((S)->csr[15])&0x0002)
82 #define CSR_LOOP(S) !!(((S)->csr[15])&0x0004)
83 #define CSR_DXMTFCS(S) !!(((S)->csr[15])&0x0008)
84 #define CSR_INTL(S) !!(((S)->csr[15])&0x0040)
85 #define CSR_DRCVPA(S) !!(((S)->csr[15])&0x2000)
86 #define CSR_DRCVBC(S) !!(((S)->csr[15])&0x4000)
87 #define CSR_PROM(S) !!(((S)->csr[15])&0x8000)
88
89 #define CSR_CRBC(S) ((S)->csr[40])
90 #define CSR_CRST(S) ((S)->csr[41])
91 #define CSR_CXBC(S) ((S)->csr[42])
92 #define CSR_CXST(S) ((S)->csr[43])
93 #define CSR_NRBC(S) ((S)->csr[44])
94 #define CSR_NRST(S) ((S)->csr[45])
95 #define CSR_POLL(S) ((S)->csr[46])
96 #define CSR_PINT(S) ((S)->csr[47])
97 #define CSR_RCVRC(S) ((S)->csr[72])
98 #define CSR_XMTRC(S) ((S)->csr[74])
99 #define CSR_RCVRL(S) ((S)->csr[76])
100 #define CSR_XMTRL(S) ((S)->csr[78])
101 #define CSR_MISSC(S) ((S)->csr[112])
102
103 #define CSR_IADR(S) ((S)->csr[ 1] | ((uint32_t)(S)->csr[ 2] << 16))
104 #define CSR_CRBA(S) ((S)->csr[18] | ((uint32_t)(S)->csr[19] << 16))
105 #define CSR_CXBA(S) ((S)->csr[20] | ((uint32_t)(S)->csr[21] << 16))
106 #define CSR_NRBA(S) ((S)->csr[22] | ((uint32_t)(S)->csr[23] << 16))
107 #define CSR_BADR(S) ((S)->csr[24] | ((uint32_t)(S)->csr[25] << 16))
108 #define CSR_NRDA(S) ((S)->csr[26] | ((uint32_t)(S)->csr[27] << 16))
109 #define CSR_CRDA(S) ((S)->csr[28] | ((uint32_t)(S)->csr[29] << 16))
110 #define CSR_BADX(S) ((S)->csr[30] | ((uint32_t)(S)->csr[31] << 16))
111 #define CSR_NXDA(S) ((S)->csr[32] | ((uint32_t)(S)->csr[33] << 16))
112 #define CSR_CXDA(S) ((S)->csr[34] | ((uint32_t)(S)->csr[35] << 16))
113 #define CSR_NNRD(S) ((S)->csr[36] | ((uint32_t)(S)->csr[37] << 16))
114 #define CSR_NNXD(S) ((S)->csr[38] | ((uint32_t)(S)->csr[39] << 16))
115 #define CSR_PXDA(S) ((S)->csr[60] | ((uint32_t)(S)->csr[61] << 16))
116 #define CSR_NXBA(S) ((S)->csr[64] | ((uint32_t)(S)->csr[65] << 16))
117
118 #define PHYSADDR(S,A) \
119 (BCR_SSIZE32(S) ? (A) : (A) | ((0xff00 & (uint32_t)(S)->csr[2])<<16))
120
121 struct pcnet_initblk16 {
122 uint16_t mode;
123 uint16_t padr[3];
124 uint16_t ladrf[4];
125 uint32_t rdra;
126 uint32_t tdra;
127 };
128
129 struct pcnet_initblk32 {
130 uint16_t mode;
131 uint8_t rlen;
132 uint8_t tlen;
133 uint16_t padr[3];
134 uint16_t _res;
135 uint16_t ladrf[4];
136 uint32_t rdra;
137 uint32_t tdra;
138 };
139
140 struct pcnet_TMD {
141 uint32_t tbadr;
142 int16_t length;
143 int16_t status;
144 uint32_t misc;
145 uint32_t res;
146 };
147
148 #define TMDL_BCNT_MASK 0x0fff
149 #define TMDL_BCNT_SH 0
150 #define TMDL_ONES_MASK 0xf000
151 #define TMDL_ONES_SH 12
152
153 #define TMDS_BPE_MASK 0x0080
154 #define TMDS_BPE_SH 7
155 #define TMDS_ENP_MASK 0x0100
156 #define TMDS_ENP_SH 8
157 #define TMDS_STP_MASK 0x0200
158 #define TMDS_STP_SH 9
159 #define TMDS_DEF_MASK 0x0400
160 #define TMDS_DEF_SH 10
161 #define TMDS_ONE_MASK 0x0800
162 #define TMDS_ONE_SH 11
163 #define TMDS_LTINT_MASK 0x1000
164 #define TMDS_LTINT_SH 12
165 #define TMDS_NOFCS_MASK 0x2000
166 #define TMDS_NOFCS_SH 13
167 #define TMDS_ADDFCS_MASK TMDS_NOFCS_MASK
168 #define TMDS_ADDFCS_SH TMDS_NOFCS_SH
169 #define TMDS_ERR_MASK 0x4000
170 #define TMDS_ERR_SH 14
171 #define TMDS_OWN_MASK 0x8000
172 #define TMDS_OWN_SH 15
173
174 #define TMDM_TRC_MASK 0x0000000f
175 #define TMDM_TRC_SH 0
176 #define TMDM_TDR_MASK 0x03ff0000
177 #define TMDM_TDR_SH 16
178 #define TMDM_RTRY_MASK 0x04000000
179 #define TMDM_RTRY_SH 26
180 #define TMDM_LCAR_MASK 0x08000000
181 #define TMDM_LCAR_SH 27
182 #define TMDM_LCOL_MASK 0x10000000
183 #define TMDM_LCOL_SH 28
184 #define TMDM_EXDEF_MASK 0x20000000
185 #define TMDM_EXDEF_SH 29
186 #define TMDM_UFLO_MASK 0x40000000
187 #define TMDM_UFLO_SH 30
188 #define TMDM_BUFF_MASK 0x80000000
189 #define TMDM_BUFF_SH 31
190
191 struct pcnet_RMD {
192 uint32_t rbadr;
193 int16_t buf_length;
194 int16_t status;
195 uint32_t msg_length;
196 uint32_t res;
197 };
198
199 #define RMDL_BCNT_MASK 0x0fff
200 #define RMDL_BCNT_SH 0
201 #define RMDL_ONES_MASK 0xf000
202 #define RMDL_ONES_SH 12
203
204 #define RMDS_BAM_MASK 0x0010
205 #define RMDS_BAM_SH 4
206 #define RMDS_LFAM_MASK 0x0020
207 #define RMDS_LFAM_SH 5
208 #define RMDS_PAM_MASK 0x0040
209 #define RMDS_PAM_SH 6
210 #define RMDS_BPE_MASK 0x0080
211 #define RMDS_BPE_SH 7
212 #define RMDS_ENP_MASK 0x0100
213 #define RMDS_ENP_SH 8
214 #define RMDS_STP_MASK 0x0200
215 #define RMDS_STP_SH 9
216 #define RMDS_BUFF_MASK 0x0400
217 #define RMDS_BUFF_SH 10
218 #define RMDS_CRC_MASK 0x0800
219 #define RMDS_CRC_SH 11
220 #define RMDS_OFLO_MASK 0x1000
221 #define RMDS_OFLO_SH 12
222 #define RMDS_FRAM_MASK 0x2000
223 #define RMDS_FRAM_SH 13
224 #define RMDS_ERR_MASK 0x4000
225 #define RMDS_ERR_SH 14
226 #define RMDS_OWN_MASK 0x8000
227 #define RMDS_OWN_SH 15
228
229 #define RMDM_MCNT_MASK 0x00000fff
230 #define RMDM_MCNT_SH 0
231 #define RMDM_ZEROS_MASK 0x0000f000
232 #define RMDM_ZEROS_SH 12
233 #define RMDM_RPC_MASK 0x00ff0000
234 #define RMDM_RPC_SH 16
235 #define RMDM_RCC_MASK 0xff000000
236 #define RMDM_RCC_SH 24
237
238 #define SET_FIELD(regp, name, field, value) \
239 (*(regp) = (*(regp) & ~(name ## _ ## field ## _MASK)) \
240 | ((value) << name ## _ ## field ## _SH))
241
242 #define GET_FIELD(reg, name, field) \
243 (((reg) & name ## _ ## field ## _MASK) >> name ## _ ## field ## _SH)
244
245 #define PRINT_TMD(T) printf( \
246 "TMD0 : TBADR=0x%08x\n" \
247 "TMD1 : OWN=%d, ERR=%d, FCS=%d, LTI=%d, " \
248 "ONE=%d, DEF=%d, STP=%d, ENP=%d,\n" \
249 " BPE=%d, BCNT=%d\n" \
250 "TMD2 : BUF=%d, UFL=%d, EXD=%d, LCO=%d, " \
251 "LCA=%d, RTR=%d,\n" \
252 " TDR=%d, TRC=%d\n", \
253 (T)->tbadr, \
254 GET_FIELD((T)->status, TMDS, OWN), \
255 GET_FIELD((T)->status, TMDS, ERR), \
256 GET_FIELD((T)->status, TMDS, NOFCS), \
257 GET_FIELD((T)->status, TMDS, LTINT), \
258 GET_FIELD((T)->status, TMDS, ONE), \
259 GET_FIELD((T)->status, TMDS, DEF), \
260 GET_FIELD((T)->status, TMDS, STP), \
261 GET_FIELD((T)->status, TMDS, ENP), \
262 GET_FIELD((T)->status, TMDS, BPE), \
263 4096-GET_FIELD((T)->length, TMDL, BCNT), \
264 GET_FIELD((T)->misc, TMDM, BUFF), \
265 GET_FIELD((T)->misc, TMDM, UFLO), \
266 GET_FIELD((T)->misc, TMDM, EXDEF), \
267 GET_FIELD((T)->misc, TMDM, LCOL), \
268 GET_FIELD((T)->misc, TMDM, LCAR), \
269 GET_FIELD((T)->misc, TMDM, RTRY), \
270 GET_FIELD((T)->misc, TMDM, TDR), \
271 GET_FIELD((T)->misc, TMDM, TRC))
272
273 #define PRINT_RMD(R) printf( \
274 "RMD0 : RBADR=0x%08x\n" \
275 "RMD1 : OWN=%d, ERR=%d, FRAM=%d, OFLO=%d, " \
276 "CRC=%d, BUFF=%d, STP=%d, ENP=%d,\n " \
277 "BPE=%d, PAM=%d, LAFM=%d, BAM=%d, ONES=%d, BCNT=%d\n" \
278 "RMD2 : RCC=%d, RPC=%d, MCNT=%d, ZEROS=%d\n", \
279 (R)->rbadr, \
280 GET_FIELD((R)->status, RMDS, OWN), \
281 GET_FIELD((R)->status, RMDS, ERR), \
282 GET_FIELD((R)->status, RMDS, FRAM), \
283 GET_FIELD((R)->status, RMDS, OFLO), \
284 GET_FIELD((R)->status, RMDS, CRC), \
285 GET_FIELD((R)->status, RMDS, BUFF), \
286 GET_FIELD((R)->status, RMDS, STP), \
287 GET_FIELD((R)->status, RMDS, ENP), \
288 GET_FIELD((R)->status, RMDS, BPE), \
289 GET_FIELD((R)->status, RMDS, PAM), \
290 GET_FIELD((R)->status, RMDS, LFAM), \
291 GET_FIELD((R)->status, RMDS, BAM), \
292 GET_FIELD((R)->buf_length, RMDL, ONES), \
293 4096-GET_FIELD((R)->buf_length, RMDL, BCNT), \
294 GET_FIELD((R)->msg_length, RMDM, RCC), \
295 GET_FIELD((R)->msg_length, RMDM, RPC), \
296 GET_FIELD((R)->msg_length, RMDM, MCNT), \
297 GET_FIELD((R)->msg_length, RMDM, ZEROS))
298
299 static inline void pcnet_tmd_load(PCNetState *s, struct pcnet_TMD *tmd,
300 hwaddr addr)
301 {
302 if (!BCR_SSIZE32(s)) {
303 struct {
304 uint32_t tbadr;
305 int16_t length;
306 int16_t status;
307 } xda;
308 s->phys_mem_read(s->dma_opaque, addr, (void *)&xda, sizeof(xda), 0);
309 tmd->tbadr = le32_to_cpu(xda.tbadr) & 0xffffff;
310 tmd->length = le16_to_cpu(xda.length);
311 tmd->status = (le32_to_cpu(xda.tbadr) >> 16) & 0xff00;
312 tmd->misc = le16_to_cpu(xda.status) << 16;
313 tmd->res = 0;
314 } else {
315 s->phys_mem_read(s->dma_opaque, addr, (void *)tmd, sizeof(*tmd), 0);
316 le32_to_cpus(&tmd->tbadr);
317 le16_to_cpus((uint16_t *)&tmd->length);
318 le16_to_cpus((uint16_t *)&tmd->status);
319 le32_to_cpus(&tmd->misc);
320 le32_to_cpus(&tmd->res);
321 if (BCR_SWSTYLE(s) == 3) {
322 uint32_t tmp = tmd->tbadr;
323 tmd->tbadr = tmd->misc;
324 tmd->misc = tmp;
325 }
326 }
327 }
328
329 static inline void pcnet_tmd_store(PCNetState *s, const struct pcnet_TMD *tmd,
330 hwaddr addr)
331 {
332 if (!BCR_SSIZE32(s)) {
333 struct {
334 uint32_t tbadr;
335 int16_t length;
336 int16_t status;
337 } xda;
338 xda.tbadr = cpu_to_le32((tmd->tbadr & 0xffffff) |
339 ((tmd->status & 0xff00) << 16));
340 xda.length = cpu_to_le16(tmd->length);
341 xda.status = cpu_to_le16(tmd->misc >> 16);
342 s->phys_mem_write(s->dma_opaque, addr, (void *)&xda, sizeof(xda), 0);
343 } else {
344 struct {
345 uint32_t tbadr;
346 int16_t length;
347 int16_t status;
348 uint32_t misc;
349 uint32_t res;
350 } xda;
351 xda.tbadr = cpu_to_le32(tmd->tbadr);
352 xda.length = cpu_to_le16(tmd->length);
353 xda.status = cpu_to_le16(tmd->status);
354 xda.misc = cpu_to_le32(tmd->misc);
355 xda.res = cpu_to_le32(tmd->res);
356 if (BCR_SWSTYLE(s) == 3) {
357 uint32_t tmp = xda.tbadr;
358 xda.tbadr = xda.misc;
359 xda.misc = tmp;
360 }
361 s->phys_mem_write(s->dma_opaque, addr, (void *)&xda, sizeof(xda), 0);
362 }
363 }
364
365 static inline void pcnet_rmd_load(PCNetState *s, struct pcnet_RMD *rmd,
366 hwaddr addr)
367 {
368 if (!BCR_SSIZE32(s)) {
369 struct {
370 uint32_t rbadr;
371 int16_t buf_length;
372 int16_t msg_length;
373 } rda;
374 s->phys_mem_read(s->dma_opaque, addr, (void *)&rda, sizeof(rda), 0);
375 rmd->rbadr = le32_to_cpu(rda.rbadr) & 0xffffff;
376 rmd->buf_length = le16_to_cpu(rda.buf_length);
377 rmd->status = (le32_to_cpu(rda.rbadr) >> 16) & 0xff00;
378 rmd->msg_length = le16_to_cpu(rda.msg_length);
379 rmd->res = 0;
380 } else {
381 s->phys_mem_read(s->dma_opaque, addr, (void *)rmd, sizeof(*rmd), 0);
382 le32_to_cpus(&rmd->rbadr);
383 le16_to_cpus((uint16_t *)&rmd->buf_length);
384 le16_to_cpus((uint16_t *)&rmd->status);
385 le32_to_cpus(&rmd->msg_length);
386 le32_to_cpus(&rmd->res);
387 if (BCR_SWSTYLE(s) == 3) {
388 uint32_t tmp = rmd->rbadr;
389 rmd->rbadr = rmd->msg_length;
390 rmd->msg_length = tmp;
391 }
392 }
393 }
394
395 static inline void pcnet_rmd_store(PCNetState *s, struct pcnet_RMD *rmd,
396 hwaddr addr)
397 {
398 if (!BCR_SSIZE32(s)) {
399 struct {
400 uint32_t rbadr;
401 int16_t buf_length;
402 int16_t msg_length;
403 } rda;
404 rda.rbadr = cpu_to_le32((rmd->rbadr & 0xffffff) |
405 ((rmd->status & 0xff00) << 16));
406 rda.buf_length = cpu_to_le16(rmd->buf_length);
407 rda.msg_length = cpu_to_le16(rmd->msg_length);
408 s->phys_mem_write(s->dma_opaque, addr, (void *)&rda, sizeof(rda), 0);
409 } else {
410 struct {
411 uint32_t rbadr;
412 int16_t buf_length;
413 int16_t status;
414 uint32_t msg_length;
415 uint32_t res;
416 } rda;
417 rda.rbadr = cpu_to_le32(rmd->rbadr);
418 rda.buf_length = cpu_to_le16(rmd->buf_length);
419 rda.status = cpu_to_le16(rmd->status);
420 rda.msg_length = cpu_to_le32(rmd->msg_length);
421 rda.res = cpu_to_le32(rmd->res);
422 if (BCR_SWSTYLE(s) == 3) {
423 uint32_t tmp = rda.rbadr;
424 rda.rbadr = rda.msg_length;
425 rda.msg_length = tmp;
426 }
427 s->phys_mem_write(s->dma_opaque, addr, (void *)&rda, sizeof(rda), 0);
428 }
429 }
430
431
432 #define TMDLOAD(TMD,ADDR) pcnet_tmd_load(s,TMD,ADDR)
433
434 #define TMDSTORE(TMD,ADDR) pcnet_tmd_store(s,TMD,ADDR)
435
436 #define RMDLOAD(RMD,ADDR) pcnet_rmd_load(s,RMD,ADDR)
437
438 #define RMDSTORE(RMD,ADDR) pcnet_rmd_store(s,RMD,ADDR)
439
440 #if 1
441
442 #define CHECK_RMD(ADDR,RES) do { \
443 struct pcnet_RMD rmd; \
444 RMDLOAD(&rmd,(ADDR)); \
445 (RES) |= (GET_FIELD(rmd.buf_length, RMDL, ONES) != 15) \
446 || (GET_FIELD(rmd.msg_length, RMDM, ZEROS) != 0); \
447 } while (0)
448
449 #define CHECK_TMD(ADDR,RES) do { \
450 struct pcnet_TMD tmd; \
451 TMDLOAD(&tmd,(ADDR)); \
452 (RES) |= (GET_FIELD(tmd.length, TMDL, ONES) != 15); \
453 } while (0)
454
455 #else
456
457 #define CHECK_RMD(ADDR,RES) do { \
458 switch (BCR_SWSTYLE(s)) { \
459 case 0x00: \
460 { \
461 uint16_t rda[4]; \
462 s->phys_mem_read(s->dma_opaque, (ADDR), \
463 (void *)&rda[0], sizeof(rda), 0); \
464 (RES) |= (rda[2] & 0xf000)!=0xf000; \
465 (RES) |= (rda[3] & 0xf000)!=0x0000; \
466 } \
467 break; \
468 case 0x01: \
469 case 0x02: \
470 { \
471 uint32_t rda[4]; \
472 s->phys_mem_read(s->dma_opaque, (ADDR), \
473 (void *)&rda[0], sizeof(rda), 0); \
474 (RES) |= (rda[1] & 0x0000f000L)!=0x0000f000L; \
475 (RES) |= (rda[2] & 0x0000f000L)!=0x00000000L; \
476 } \
477 break; \
478 case 0x03: \
479 { \
480 uint32_t rda[4]; \
481 s->phys_mem_read(s->dma_opaque, (ADDR), \
482 (void *)&rda[0], sizeof(rda), 0); \
483 (RES) |= (rda[0] & 0x0000f000L)!=0x00000000L; \
484 (RES) |= (rda[1] & 0x0000f000L)!=0x0000f000L; \
485 } \
486 break; \
487 } \
488 } while (0)
489
490 #define CHECK_TMD(ADDR,RES) do { \
491 switch (BCR_SWSTYLE(s)) { \
492 case 0x00: \
493 { \
494 uint16_t xda[4]; \
495 s->phys_mem_read(s->dma_opaque, (ADDR), \
496 (void *)&xda[0], sizeof(xda), 0); \
497 (RES) |= (xda[2] & 0xf000)!=0xf000; \
498 } \
499 break; \
500 case 0x01: \
501 case 0x02: \
502 case 0x03: \
503 { \
504 uint32_t xda[4]; \
505 s->phys_mem_read(s->dma_opaque, (ADDR), \
506 (void *)&xda[0], sizeof(xda), 0); \
507 (RES) |= (xda[1] & 0x0000f000L)!=0x0000f000L; \
508 } \
509 break; \
510 } \
511 } while (0)
512
513 #endif
514
515 #define PRINT_PKTHDR(BUF) do { \
516 struct qemu_ether_header *hdr = (void *)(BUF); \
517 printf("packet dhost=%02x:%02x:%02x:%02x:%02x:%02x, " \
518 "shost=%02x:%02x:%02x:%02x:%02x:%02x, " \
519 "type=0x%04x\n", \
520 hdr->ether_dhost[0],hdr->ether_dhost[1],hdr->ether_dhost[2], \
521 hdr->ether_dhost[3],hdr->ether_dhost[4],hdr->ether_dhost[5], \
522 hdr->ether_shost[0],hdr->ether_shost[1],hdr->ether_shost[2], \
523 hdr->ether_shost[3],hdr->ether_shost[4],hdr->ether_shost[5], \
524 be16_to_cpu(hdr->ether_type)); \
525 } while (0)
526
527 #define CRC(crc, ch) (crc = (crc >> 8) ^ crctab[(crc ^ (ch)) & 0xff])
528
529 /* generated using the AUTODIN II polynomial
530 * x^32 + x^26 + x^23 + x^22 + x^16 +
531 * x^12 + x^11 + x^10 + x^8 + x^7 + x^5 + x^4 + x^2 + x^1 + 1
532 */
533 static const uint32_t crctab[256] = {
534 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba,
535 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
536 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
537 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
538 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
539 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
540 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,
541 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
542 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
543 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
544 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940,
545 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
546 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116,
547 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
548 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
549 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
550 0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a,
551 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
552 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818,
553 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
554 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
555 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
556 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c,
557 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
558 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
559 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
560 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
561 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
562 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086,
563 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
564 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4,
565 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
566 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
567 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
568 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
569 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
570 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe,
571 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
572 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
573 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
574 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252,
575 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
576 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60,
577 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
578 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
579 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
580 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04,
581 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
582 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a,
583 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
584 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
585 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
586 0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e,
587 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
588 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
589 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
590 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
591 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
592 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0,
593 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
594 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6,
595 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
596 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
597 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d,
598 };
599
600 static inline int padr_match(PCNetState *s, const uint8_t *buf, int size)
601 {
602 struct qemu_ether_header *hdr = (void *)buf;
603 uint8_t padr[6] = {
604 s->csr[12] & 0xff, s->csr[12] >> 8,
605 s->csr[13] & 0xff, s->csr[13] >> 8,
606 s->csr[14] & 0xff, s->csr[14] >> 8
607 };
608 int result = (!CSR_DRCVPA(s)) && !memcmp(hdr->ether_dhost, padr, 6);
609 #ifdef PCNET_DEBUG_MATCH
610 printf("packet dhost=%02x:%02x:%02x:%02x:%02x:%02x, "
611 "padr=%02x:%02x:%02x:%02x:%02x:%02x\n",
612 hdr->ether_dhost[0],hdr->ether_dhost[1],hdr->ether_dhost[2],
613 hdr->ether_dhost[3],hdr->ether_dhost[4],hdr->ether_dhost[5],
614 padr[0],padr[1],padr[2],padr[3],padr[4],padr[5]);
615 printf("padr_match result=%d\n", result);
616 #endif
617 return result;
618 }
619
620 static inline int padr_bcast(PCNetState *s, const uint8_t *buf, int size)
621 {
622 static const uint8_t BCAST[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
623 struct qemu_ether_header *hdr = (void *)buf;
624 int result = !CSR_DRCVBC(s) && !memcmp(hdr->ether_dhost, BCAST, 6);
625 #ifdef PCNET_DEBUG_MATCH
626 printf("padr_bcast result=%d\n", result);
627 #endif
628 return result;
629 }
630
631 static inline int ladr_match(PCNetState *s, const uint8_t *buf, int size)
632 {
633 struct qemu_ether_header *hdr = (void *)buf;
634 if ((*(hdr->ether_dhost)&0x01) &&
635 ((uint64_t *)&s->csr[8])[0] != 0LL) {
636 uint8_t ladr[8] = {
637 s->csr[8] & 0xff, s->csr[8] >> 8,
638 s->csr[9] & 0xff, s->csr[9] >> 8,
639 s->csr[10] & 0xff, s->csr[10] >> 8,
640 s->csr[11] & 0xff, s->csr[11] >> 8
641 };
642 int index = net_crc32_le(hdr->ether_dhost, ETH_ALEN) >> 26;
643 return !!(ladr[index >> 3] & (1 << (index & 7)));
644 }
645 return 0;
646 }
647
648 static inline hwaddr pcnet_rdra_addr(PCNetState *s, int idx)
649 {
650 while (idx < 1) {
651 idx += CSR_RCVRL(s);
652 }
653 return s->rdra + ((CSR_RCVRL(s) - idx) * (BCR_SWSTYLE(s) ? 16 : 8));
654 }
655
656 static inline int64_t pcnet_get_next_poll_time(PCNetState *s, int64_t current_time)
657 {
658 int64_t next_time = current_time +
659 (65536 - (CSR_SPND(s) ? 0 : CSR_POLL(s))) * 30;
660
661 if (next_time <= current_time) {
662 next_time = current_time + 1;
663 }
664 return next_time;
665 }
666
667 static void pcnet_poll(PCNetState *s);
668 static void pcnet_poll_timer(void *opaque);
669
670 static uint32_t pcnet_csr_readw(PCNetState *s, uint32_t rap);
671 static void pcnet_csr_writew(PCNetState *s, uint32_t rap, uint32_t new_value);
672 static void pcnet_bcr_writew(PCNetState *s, uint32_t rap, uint32_t val);
673
674 static void pcnet_s_reset(PCNetState *s)
675 {
676 trace_pcnet_s_reset(s);
677
678 s->rdra = 0;
679 s->tdra = 0;
680 s->rap = 0;
681
682 s->bcr[BCR_BSBC] &= ~0x0080;
683
684 s->csr[0] = 0x0004;
685 s->csr[3] = 0x0000;
686 s->csr[4] = 0x0115;
687 s->csr[5] = 0x0000;
688 s->csr[6] = 0x0000;
689 s->csr[8] = 0;
690 s->csr[9] = 0;
691 s->csr[10] = 0;
692 s->csr[11] = 0;
693 s->csr[12] = le16_to_cpu(((uint16_t *)&s->prom[0])[0]);
694 s->csr[13] = le16_to_cpu(((uint16_t *)&s->prom[0])[1]);
695 s->csr[14] = le16_to_cpu(((uint16_t *)&s->prom[0])[2]);
696 s->csr[15] &= 0x21c4;
697 s->csr[72] = 1;
698 s->csr[74] = 1;
699 s->csr[76] = 1;
700 s->csr[78] = 1;
701 s->csr[80] = 0x1410;
702 s->csr[88] = 0x1003;
703 s->csr[89] = 0x0262;
704 s->csr[94] = 0x0000;
705 s->csr[100] = 0x0200;
706 s->csr[103] = 0x0105;
707 s->csr[112] = 0x0000;
708 s->csr[114] = 0x0000;
709 s->csr[122] = 0x0000;
710 s->csr[124] = 0x0000;
711
712 s->tx_busy = 0;
713 }
714
715 static void pcnet_update_irq(PCNetState *s)
716 {
717 int isr = 0;
718 s->csr[0] &= ~0x0080;
719
720 #if 1
721 if (((s->csr[0] & ~s->csr[3]) & 0x5f00) ||
722 (((s->csr[4]>>1) & ~s->csr[4]) & 0x0115) ||
723 (((s->csr[5]>>1) & s->csr[5]) & 0x0048))
724 #else
725 if ((!(s->csr[3] & 0x4000) && !!(s->csr[0] & 0x4000)) /* BABL */ ||
726 (!(s->csr[3] & 0x1000) && !!(s->csr[0] & 0x1000)) /* MISS */ ||
727 (!(s->csr[3] & 0x0100) && !!(s->csr[0] & 0x0100)) /* IDON */ ||
728 (!(s->csr[3] & 0x0200) && !!(s->csr[0] & 0x0200)) /* TINT */ ||
729 (!(s->csr[3] & 0x0400) && !!(s->csr[0] & 0x0400)) /* RINT */ ||
730 (!(s->csr[3] & 0x0800) && !!(s->csr[0] & 0x0800)) /* MERR */ ||
731 (!(s->csr[4] & 0x0001) && !!(s->csr[4] & 0x0002)) /* JAB */ ||
732 (!(s->csr[4] & 0x0004) && !!(s->csr[4] & 0x0008)) /* TXSTRT */ ||
733 (!(s->csr[4] & 0x0010) && !!(s->csr[4] & 0x0020)) /* RCVO */ ||
734 (!(s->csr[4] & 0x0100) && !!(s->csr[4] & 0x0200)) /* MFCO */ ||
735 (!!(s->csr[5] & 0x0040) && !!(s->csr[5] & 0x0080)) /* EXDINT */ ||
736 (!!(s->csr[5] & 0x0008) && !!(s->csr[5] & 0x0010)) /* MPINT */)
737 #endif
738 {
739
740 isr = CSR_INEA(s);
741 s->csr[0] |= 0x0080;
742 }
743
744 if (!!(s->csr[4] & 0x0080) && CSR_INEA(s)) { /* UINT */
745 s->csr[4] &= ~0x0080;
746 s->csr[4] |= 0x0040;
747 s->csr[0] |= 0x0080;
748 isr = 1;
749 trace_pcnet_user_int(s);
750 }
751
752 #if 1
753 if (((s->csr[5]>>1) & s->csr[5]) & 0x0500)
754 #else
755 if ((!!(s->csr[5] & 0x0400) && !!(s->csr[5] & 0x0800)) /* SINT */ ||
756 (!!(s->csr[5] & 0x0100) && !!(s->csr[5] & 0x0200)) /* SLPINT */ )
757 #endif
758 {
759 isr = 1;
760 s->csr[0] |= 0x0080;
761 }
762
763 if (isr != s->isr) {
764 trace_pcnet_isr_change(s, isr, s->isr);
765 }
766 qemu_set_irq(s->irq, isr);
767 s->isr = isr;
768 }
769
770 static void pcnet_init(PCNetState *s)
771 {
772 int rlen, tlen;
773 uint16_t padr[3], ladrf[4], mode;
774 uint32_t rdra, tdra;
775
776 trace_pcnet_init(s, PHYSADDR(s, CSR_IADR(s)));
777
778 if (BCR_SSIZE32(s)) {
779 struct pcnet_initblk32 initblk;
780 s->phys_mem_read(s->dma_opaque, PHYSADDR(s,CSR_IADR(s)),
781 (uint8_t *)&initblk, sizeof(initblk), 0);
782 mode = le16_to_cpu(initblk.mode);
783 rlen = initblk.rlen >> 4;
784 tlen = initblk.tlen >> 4;
785 ladrf[0] = le16_to_cpu(initblk.ladrf[0]);
786 ladrf[1] = le16_to_cpu(initblk.ladrf[1]);
787 ladrf[2] = le16_to_cpu(initblk.ladrf[2]);
788 ladrf[3] = le16_to_cpu(initblk.ladrf[3]);
789 padr[0] = le16_to_cpu(initblk.padr[0]);
790 padr[1] = le16_to_cpu(initblk.padr[1]);
791 padr[2] = le16_to_cpu(initblk.padr[2]);
792 rdra = le32_to_cpu(initblk.rdra);
793 tdra = le32_to_cpu(initblk.tdra);
794 } else {
795 struct pcnet_initblk16 initblk;
796 s->phys_mem_read(s->dma_opaque, PHYSADDR(s,CSR_IADR(s)),
797 (uint8_t *)&initblk, sizeof(initblk), 0);
798 mode = le16_to_cpu(initblk.mode);
799 ladrf[0] = le16_to_cpu(initblk.ladrf[0]);
800 ladrf[1] = le16_to_cpu(initblk.ladrf[1]);
801 ladrf[2] = le16_to_cpu(initblk.ladrf[2]);
802 ladrf[3] = le16_to_cpu(initblk.ladrf[3]);
803 padr[0] = le16_to_cpu(initblk.padr[0]);
804 padr[1] = le16_to_cpu(initblk.padr[1]);
805 padr[2] = le16_to_cpu(initblk.padr[2]);
806 rdra = le32_to_cpu(initblk.rdra);
807 tdra = le32_to_cpu(initblk.tdra);
808 rlen = rdra >> 29;
809 tlen = tdra >> 29;
810 rdra &= 0x00ffffff;
811 tdra &= 0x00ffffff;
812 }
813
814 trace_pcnet_rlen_tlen(s, rlen, tlen);
815
816 CSR_RCVRL(s) = (rlen < 9) ? (1 << rlen) : 512;
817 CSR_XMTRL(s) = (tlen < 9) ? (1 << tlen) : 512;
818 s->csr[ 6] = (tlen << 12) | (rlen << 8);
819 s->csr[15] = mode;
820 s->csr[ 8] = ladrf[0];
821 s->csr[ 9] = ladrf[1];
822 s->csr[10] = ladrf[2];
823 s->csr[11] = ladrf[3];
824 s->csr[12] = padr[0];
825 s->csr[13] = padr[1];
826 s->csr[14] = padr[2];
827 s->rdra = PHYSADDR(s, rdra);
828 s->tdra = PHYSADDR(s, tdra);
829
830 CSR_RCVRC(s) = CSR_RCVRL(s);
831 CSR_XMTRC(s) = CSR_XMTRL(s);
832
833 trace_pcnet_ss32_rdra_tdra(s, BCR_SSIZE32(s),
834 s->rdra, CSR_RCVRL(s), s->tdra, CSR_XMTRL(s));
835
836 s->csr[0] |= 0x0101;
837 s->csr[0] &= ~0x0004; /* clear STOP bit */
838
839 qemu_flush_queued_packets(qemu_get_queue(s->nic));
840 }
841
842 static void pcnet_start(PCNetState *s)
843 {
844 #ifdef PCNET_DEBUG
845 printf("pcnet_start\n");
846 #endif
847
848 if (!CSR_DTX(s)) {
849 s->csr[0] |= 0x0010; /* set TXON */
850 }
851 if (!CSR_DRX(s)) {
852 s->csr[0] |= 0x0020; /* set RXON */
853 }
854 s->csr[0] &= ~0x0004; /* clear STOP bit */
855 s->csr[0] |= 0x0002;
856 pcnet_poll_timer(s);
857
858 qemu_flush_queued_packets(qemu_get_queue(s->nic));
859 }
860
861 static void pcnet_stop(PCNetState *s)
862 {
863 #ifdef PCNET_DEBUG
864 printf("pcnet_stop\n");
865 #endif
866 s->csr[0] &= ~0xffeb;
867 s->csr[0] |= 0x0014;
868 s->csr[4] &= ~0x02c2;
869 s->csr[5] &= ~0x0011;
870 pcnet_poll_timer(s);
871 }
872
873 static void pcnet_rdte_poll(PCNetState *s)
874 {
875 s->csr[28] = s->csr[29] = 0;
876 if (s->rdra) {
877 int bad = 0;
878 #if 1
879 hwaddr crda = pcnet_rdra_addr(s, CSR_RCVRC(s));
880 hwaddr nrda = pcnet_rdra_addr(s, -1 + CSR_RCVRC(s));
881 hwaddr nnrd = pcnet_rdra_addr(s, -2 + CSR_RCVRC(s));
882 #else
883 hwaddr crda = s->rdra +
884 (CSR_RCVRL(s) - CSR_RCVRC(s)) *
885 (BCR_SWSTYLE(s) ? 16 : 8 );
886 int nrdc = CSR_RCVRC(s)<=1 ? CSR_RCVRL(s) : CSR_RCVRC(s)-1;
887 hwaddr nrda = s->rdra +
888 (CSR_RCVRL(s) - nrdc) *
889 (BCR_SWSTYLE(s) ? 16 : 8 );
890 int nnrc = nrdc<=1 ? CSR_RCVRL(s) : nrdc-1;
891 hwaddr nnrd = s->rdra +
892 (CSR_RCVRL(s) - nnrc) *
893 (BCR_SWSTYLE(s) ? 16 : 8 );
894 #endif
895
896 CHECK_RMD(crda, bad);
897 if (!bad) {
898 CHECK_RMD(nrda, bad);
899 if (bad || (nrda == crda)) nrda = 0;
900 CHECK_RMD(nnrd, bad);
901 if (bad || (nnrd == crda)) nnrd = 0;
902
903 s->csr[28] = crda & 0xffff;
904 s->csr[29] = crda >> 16;
905 s->csr[26] = nrda & 0xffff;
906 s->csr[27] = nrda >> 16;
907 s->csr[36] = nnrd & 0xffff;
908 s->csr[37] = nnrd >> 16;
909 #ifdef PCNET_DEBUG
910 if (bad) {
911 printf("pcnet: BAD RMD RECORDS AFTER 0x" TARGET_FMT_plx "\n",
912 crda);
913 }
914 } else {
915 printf("pcnet: BAD RMD RDA=0x" TARGET_FMT_plx "\n", crda);
916 #endif
917 }
918 }
919
920 if (CSR_CRDA(s)) {
921 struct pcnet_RMD rmd;
922 RMDLOAD(&rmd, PHYSADDR(s,CSR_CRDA(s)));
923 CSR_CRBC(s) = GET_FIELD(rmd.buf_length, RMDL, BCNT);
924 CSR_CRST(s) = rmd.status;
925 #ifdef PCNET_DEBUG_RMD_X
926 printf("CRDA=0x%08x CRST=0x%04x RCVRC=%d RMDL=0x%04x RMDS=0x%04x RMDM=0x%08x\n",
927 PHYSADDR(s,CSR_CRDA(s)), CSR_CRST(s), CSR_RCVRC(s),
928 rmd.buf_length, rmd.status, rmd.msg_length);
929 PRINT_RMD(&rmd);
930 #endif
931 } else {
932 CSR_CRBC(s) = CSR_CRST(s) = 0;
933 }
934
935 if (CSR_NRDA(s)) {
936 struct pcnet_RMD rmd;
937 RMDLOAD(&rmd, PHYSADDR(s,CSR_NRDA(s)));
938 CSR_NRBC(s) = GET_FIELD(rmd.buf_length, RMDL, BCNT);
939 CSR_NRST(s) = rmd.status;
940 } else {
941 CSR_NRBC(s) = CSR_NRST(s) = 0;
942 }
943
944 }
945
946 static int pcnet_tdte_poll(PCNetState *s)
947 {
948 s->csr[34] = s->csr[35] = 0;
949 if (s->tdra) {
950 hwaddr cxda = s->tdra +
951 (CSR_XMTRL(s) - CSR_XMTRC(s)) *
952 (BCR_SWSTYLE(s) ? 16 : 8);
953 int bad = 0;
954 CHECK_TMD(cxda, bad);
955 if (!bad) {
956 if (CSR_CXDA(s) != cxda) {
957 s->csr[60] = s->csr[34];
958 s->csr[61] = s->csr[35];
959 s->csr[62] = CSR_CXBC(s);
960 s->csr[63] = CSR_CXST(s);
961 }
962 s->csr[34] = cxda & 0xffff;
963 s->csr[35] = cxda >> 16;
964 #ifdef PCNET_DEBUG_X
965 printf("pcnet: BAD TMD XDA=0x%08x\n", cxda);
966 #endif
967 }
968 }
969
970 if (CSR_CXDA(s)) {
971 struct pcnet_TMD tmd;
972
973 TMDLOAD(&tmd, PHYSADDR(s,CSR_CXDA(s)));
974
975 CSR_CXBC(s) = GET_FIELD(tmd.length, TMDL, BCNT);
976 CSR_CXST(s) = tmd.status;
977 } else {
978 CSR_CXBC(s) = CSR_CXST(s) = 0;
979 }
980
981 return !!(CSR_CXST(s) & 0x8000);
982 }
983
984 #define MIN_BUF_SIZE 60
985
986 ssize_t pcnet_receive(NetClientState *nc, const uint8_t *buf, size_t size_)
987 {
988 PCNetState *s = qemu_get_nic_opaque(nc);
989 int is_padr = 0, is_bcast = 0, is_ladr = 0;
990 uint8_t buf1[60];
991 int remaining;
992 int crc_err = 0;
993 size_t size = size_;
994
995 if (CSR_DRX(s) || CSR_STOP(s) || CSR_SPND(s) || !size ||
996 (CSR_LOOP(s) && !s->looptest)) {
997 return -1;
998 }
999 #ifdef PCNET_DEBUG
1000 printf("pcnet_receive size=%zu\n", size);
1001 #endif
1002
1003 /* if too small buffer, then expand it */
1004 if (size < MIN_BUF_SIZE) {
1005 memcpy(buf1, buf, size);
1006 memset(buf1 + size, 0, MIN_BUF_SIZE - size);
1007 buf = buf1;
1008 size = MIN_BUF_SIZE;
1009 }
1010
1011 if (CSR_PROM(s)
1012 || (is_padr=padr_match(s, buf, size))
1013 || (is_bcast=padr_bcast(s, buf, size))
1014 || (is_ladr=ladr_match(s, buf, size))) {
1015
1016 pcnet_rdte_poll(s);
1017
1018 if (!(CSR_CRST(s) & 0x8000) && s->rdra) {
1019 struct pcnet_RMD rmd;
1020 int rcvrc = CSR_RCVRC(s)-1,i;
1021 hwaddr nrda;
1022 for (i = CSR_RCVRL(s)-1; i > 0; i--, rcvrc--) {
1023 if (rcvrc <= 1)
1024 rcvrc = CSR_RCVRL(s);
1025 nrda = s->rdra +
1026 (CSR_RCVRL(s) - rcvrc) *
1027 (BCR_SWSTYLE(s) ? 16 : 8 );
1028 RMDLOAD(&rmd, nrda);
1029 if (GET_FIELD(rmd.status, RMDS, OWN)) {
1030 #ifdef PCNET_DEBUG_RMD
1031 printf("pcnet - scan buffer: RCVRC=%d PREV_RCVRC=%d\n",
1032 rcvrc, CSR_RCVRC(s));
1033 #endif
1034 CSR_RCVRC(s) = rcvrc;
1035 pcnet_rdte_poll(s);
1036 break;
1037 }
1038 }
1039 }
1040
1041 if (!(CSR_CRST(s) & 0x8000)) {
1042 #ifdef PCNET_DEBUG_RMD
1043 printf("pcnet - no buffer: RCVRC=%d\n", CSR_RCVRC(s));
1044 #endif
1045 s->csr[0] |= 0x1000; /* Set MISS flag */
1046 CSR_MISSC(s)++;
1047 } else {
1048 uint8_t *src = s->buffer;
1049 hwaddr crda = CSR_CRDA(s);
1050 struct pcnet_RMD rmd;
1051 int pktcount = 0;
1052
1053 if (!s->looptest) {
1054 if (size > 4092) {
1055 #ifdef PCNET_DEBUG_RMD
1056 fprintf(stderr, "pcnet: truncates rx packet.\n");
1057 #endif
1058 size = 4092;
1059 }
1060 memcpy(src, buf, size);
1061 /* no need to compute the CRC */
1062 src[size] = 0;
1063 src[size + 1] = 0;
1064 src[size + 2] = 0;
1065 src[size + 3] = 0;
1066 size += 4;
1067 } else if (s->looptest == PCNET_LOOPTEST_CRC ||
1068 !CSR_DXMTFCS(s) || size < MIN_BUF_SIZE+4) {
1069 uint32_t fcs = ~0;
1070 uint8_t *p = src;
1071
1072 while (p != &src[size])
1073 CRC(fcs, *p++);
1074 *(uint32_t *)p = htonl(fcs);
1075 size += 4;
1076 } else {
1077 uint32_t fcs = ~0;
1078 uint8_t *p = src;
1079
1080 while (p != &src[size])
1081 CRC(fcs, *p++);
1082 crc_err = (*(uint32_t *)p != htonl(fcs));
1083 }
1084
1085 #ifdef PCNET_DEBUG_MATCH
1086 PRINT_PKTHDR(buf);
1087 #endif
1088
1089 RMDLOAD(&rmd, PHYSADDR(s,crda));
1090 /*if (!CSR_LAPPEN(s))*/
1091 SET_FIELD(&rmd.status, RMDS, STP, 1);
1092
1093 #define PCNET_RECV_STORE() do { \
1094 int count = MIN(4096 - GET_FIELD(rmd.buf_length, RMDL, BCNT),remaining); \
1095 hwaddr rbadr = PHYSADDR(s, rmd.rbadr); \
1096 s->phys_mem_write(s->dma_opaque, rbadr, src, count, CSR_BSWP(s)); \
1097 src += count; remaining -= count; \
1098 SET_FIELD(&rmd.status, RMDS, OWN, 0); \
1099 RMDSTORE(&rmd, PHYSADDR(s,crda)); \
1100 pktcount++; \
1101 } while (0)
1102
1103 remaining = size;
1104 PCNET_RECV_STORE();
1105 if ((remaining > 0) && CSR_NRDA(s)) {
1106 hwaddr nrda = CSR_NRDA(s);
1107 #ifdef PCNET_DEBUG_RMD
1108 PRINT_RMD(&rmd);
1109 #endif
1110 RMDLOAD(&rmd, PHYSADDR(s,nrda));
1111 if (GET_FIELD(rmd.status, RMDS, OWN)) {
1112 crda = nrda;
1113 PCNET_RECV_STORE();
1114 #ifdef PCNET_DEBUG_RMD
1115 PRINT_RMD(&rmd);
1116 #endif
1117 if ((remaining > 0) && (nrda=CSR_NNRD(s))) {
1118 RMDLOAD(&rmd, PHYSADDR(s,nrda));
1119 if (GET_FIELD(rmd.status, RMDS, OWN)) {
1120 crda = nrda;
1121 PCNET_RECV_STORE();
1122 }
1123 }
1124 }
1125 }
1126
1127 #undef PCNET_RECV_STORE
1128
1129 RMDLOAD(&rmd, PHYSADDR(s,crda));
1130 if (remaining == 0) {
1131 SET_FIELD(&rmd.msg_length, RMDM, MCNT, size);
1132 SET_FIELD(&rmd.status, RMDS, ENP, 1);
1133 SET_FIELD(&rmd.status, RMDS, PAM, !CSR_PROM(s) && is_padr);
1134 SET_FIELD(&rmd.status, RMDS, LFAM, !CSR_PROM(s) && is_ladr);
1135 SET_FIELD(&rmd.status, RMDS, BAM, !CSR_PROM(s) && is_bcast);
1136 if (crc_err) {
1137 SET_FIELD(&rmd.status, RMDS, CRC, 1);
1138 SET_FIELD(&rmd.status, RMDS, ERR, 1);
1139 }
1140 } else {
1141 SET_FIELD(&rmd.status, RMDS, OFLO, 1);
1142 SET_FIELD(&rmd.status, RMDS, BUFF, 1);
1143 SET_FIELD(&rmd.status, RMDS, ERR, 1);
1144 }
1145 RMDSTORE(&rmd, PHYSADDR(s,crda));
1146 s->csr[0] |= 0x0400;
1147
1148 #ifdef PCNET_DEBUG
1149 printf("RCVRC=%d CRDA=0x%08x BLKS=%d\n",
1150 CSR_RCVRC(s), PHYSADDR(s,CSR_CRDA(s)), pktcount);
1151 #endif
1152 #ifdef PCNET_DEBUG_RMD
1153 PRINT_RMD(&rmd);
1154 #endif
1155
1156 while (pktcount--) {
1157 if (CSR_RCVRC(s) <= 1) {
1158 CSR_RCVRC(s) = CSR_RCVRL(s);
1159 } else {
1160 CSR_RCVRC(s)--;
1161 }
1162 }
1163
1164 pcnet_rdte_poll(s);
1165
1166 }
1167 }
1168
1169 pcnet_poll(s);
1170 pcnet_update_irq(s);
1171
1172 return size_;
1173 }
1174
1175 void pcnet_set_link_status(NetClientState *nc)
1176 {
1177 PCNetState *d = qemu_get_nic_opaque(nc);
1178
1179 d->lnkst = nc->link_down ? 0 : 0x40;
1180 }
1181
1182 static void pcnet_transmit(PCNetState *s)
1183 {
1184 hwaddr xmit_cxda = 0;
1185 int count = CSR_XMTRL(s)-1;
1186 int add_crc = 0;
1187 int bcnt;
1188 s->xmit_pos = -1;
1189
1190 if (!CSR_TXON(s)) {
1191 s->csr[0] &= ~0x0008;
1192 return;
1193 }
1194
1195 s->tx_busy = 1;
1196
1197 txagain:
1198 if (pcnet_tdte_poll(s)) {
1199 struct pcnet_TMD tmd;
1200
1201 TMDLOAD(&tmd, PHYSADDR(s,CSR_CXDA(s)));
1202
1203 #ifdef PCNET_DEBUG_TMD
1204 printf(" TMDLOAD 0x%08x\n", PHYSADDR(s,CSR_CXDA(s)));
1205 PRINT_TMD(&tmd);
1206 #endif
1207 if (GET_FIELD(tmd.status, TMDS, STP)) {
1208 s->xmit_pos = 0;
1209 xmit_cxda = PHYSADDR(s,CSR_CXDA(s));
1210 if (BCR_SWSTYLE(s) != 1)
1211 add_crc = GET_FIELD(tmd.status, TMDS, ADDFCS);
1212 }
1213 if (s->lnkst == 0 &&
1214 (!CSR_LOOP(s) || (!CSR_INTL(s) && !BCR_TMAULOOP(s)))) {
1215 SET_FIELD(&tmd.misc, TMDM, LCAR, 1);
1216 SET_FIELD(&tmd.status, TMDS, ERR, 1);
1217 SET_FIELD(&tmd.status, TMDS, OWN, 0);
1218 s->csr[0] |= 0xa000; /* ERR | CERR */
1219 s->xmit_pos = -1;
1220 goto txdone;
1221 }
1222
1223 if (s->xmit_pos < 0) {
1224 goto txdone;
1225 }
1226
1227 bcnt = 4096 - GET_FIELD(tmd.length, TMDL, BCNT);
1228
1229 /* if multi-tmd packet outsizes s->buffer then skip it silently.
1230 * Note: this is not what real hw does.
1231 * Last four bytes of s->buffer are used to store CRC FCS code.
1232 */
1233 if (s->xmit_pos + bcnt > sizeof(s->buffer) - 4) {
1234 s->xmit_pos = -1;
1235 goto txdone;
1236 }
1237
1238 s->phys_mem_read(s->dma_opaque, PHYSADDR(s, tmd.tbadr),
1239 s->buffer + s->xmit_pos, bcnt, CSR_BSWP(s));
1240 s->xmit_pos += bcnt;
1241
1242 if (!GET_FIELD(tmd.status, TMDS, ENP)) {
1243 goto txdone;
1244 }
1245
1246 #ifdef PCNET_DEBUG
1247 printf("pcnet_transmit size=%d\n", s->xmit_pos);
1248 #endif
1249 if (CSR_LOOP(s)) {
1250 if (BCR_SWSTYLE(s) == 1)
1251 add_crc = !GET_FIELD(tmd.status, TMDS, NOFCS);
1252 s->looptest = add_crc ? PCNET_LOOPTEST_CRC : PCNET_LOOPTEST_NOCRC;
1253 qemu_receive_packet(qemu_get_queue(s->nic), s->buffer, s->xmit_pos);
1254 s->looptest = 0;
1255 } else {
1256 if (s->nic) {
1257 qemu_send_packet(qemu_get_queue(s->nic), s->buffer,
1258 s->xmit_pos);
1259 }
1260 }
1261
1262 s->csr[0] &= ~0x0008; /* clear TDMD */
1263 s->csr[4] |= 0x0004; /* set TXSTRT */
1264 s->xmit_pos = -1;
1265
1266 txdone:
1267 SET_FIELD(&tmd.status, TMDS, OWN, 0);
1268 TMDSTORE(&tmd, PHYSADDR(s,CSR_CXDA(s)));
1269 if (!CSR_TOKINTD(s)
1270 || (CSR_LTINTEN(s) && GET_FIELD(tmd.status, TMDS, LTINT))) {
1271 s->csr[0] |= 0x0200; /* set TINT */
1272 }
1273 if (CSR_XMTRC(s) <= 1) {
1274 CSR_XMTRC(s) = CSR_XMTRL(s);
1275 } else {
1276 CSR_XMTRC(s)--;
1277 }
1278 if (count--) {
1279 goto txagain;
1280 }
1281 } else if (s->xmit_pos >= 0) {
1282 struct pcnet_TMD tmd;
1283 TMDLOAD(&tmd, xmit_cxda);
1284 SET_FIELD(&tmd.misc, TMDM, BUFF, 1);
1285 SET_FIELD(&tmd.misc, TMDM, UFLO, 1);
1286 SET_FIELD(&tmd.status, TMDS, ERR, 1);
1287 SET_FIELD(&tmd.status, TMDS, OWN, 0);
1288 TMDSTORE(&tmd, xmit_cxda);
1289 s->csr[0] |= 0x0200; /* set TINT */
1290 if (!CSR_DXSUFLO(s)) {
1291 s->csr[0] &= ~0x0010;
1292 } else if (count--) {
1293 goto txagain;
1294 }
1295 }
1296
1297 s->tx_busy = 0;
1298 }
1299
1300 static void pcnet_poll(PCNetState *s)
1301 {
1302 if (CSR_RXON(s)) {
1303 pcnet_rdte_poll(s);
1304 }
1305
1306 if (CSR_TDMD(s) || (CSR_TXON(s) && !CSR_DPOLL(s) && pcnet_tdte_poll(s))) {
1307 /* prevent recursion */
1308 if (s->tx_busy) {
1309 return;
1310 }
1311 pcnet_transmit(s);
1312 }
1313 }
1314
1315 static void pcnet_poll_timer(void *opaque)
1316 {
1317 PCNetState *s = opaque;
1318
1319 timer_del(s->poll_timer);
1320
1321 if (CSR_TDMD(s)) {
1322 pcnet_transmit(s);
1323 }
1324
1325 pcnet_update_irq(s);
1326
1327 if (!CSR_STOP(s) && !CSR_SPND(s) && !CSR_DPOLL(s)) {
1328 uint64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) * 33;
1329 if (!s->timer || !now) {
1330 s->timer = now;
1331 } else {
1332 uint64_t t = now - s->timer + CSR_POLL(s);
1333 if (t > 0xffffLL) {
1334 pcnet_poll(s);
1335 CSR_POLL(s) = CSR_PINT(s);
1336 } else {
1337 CSR_POLL(s) = t;
1338 }
1339 }
1340 timer_mod(s->poll_timer,
1341 pcnet_get_next_poll_time(s,qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)));
1342 }
1343 }
1344
1345
1346 static void pcnet_csr_writew(PCNetState *s, uint32_t rap, uint32_t new_value)
1347 {
1348 uint16_t val = new_value;
1349 #ifdef PCNET_DEBUG_CSR
1350 printf("pcnet_csr_writew rap=%d val=0x%04x\n", rap, val);
1351 #endif
1352 switch (rap) {
1353 case 0:
1354 s->csr[0] &= ~(val & 0x7f00); /* Clear any interrupt flags */
1355
1356 s->csr[0] = (s->csr[0] & ~0x0040) | (val & 0x0048);
1357
1358 val = (val & 0x007f) | (s->csr[0] & 0x7f00);
1359
1360 /* IFF STOP, STRT and INIT are set, clear STRT and INIT */
1361 if ((val & 7) == 7) {
1362 val &= ~3;
1363 }
1364 if (!CSR_STOP(s) && (val & 4)) {
1365 pcnet_stop(s);
1366 }
1367 if (!CSR_INIT(s) && (val & 1)) {
1368 pcnet_init(s);
1369 }
1370 if (!CSR_STRT(s) && (val & 2)) {
1371 pcnet_start(s);
1372 }
1373 if (CSR_TDMD(s)) {
1374 pcnet_transmit(s);
1375 }
1376 return;
1377 case 1:
1378 case 2:
1379 case 8:
1380 case 9:
1381 case 10:
1382 case 11:
1383 case 12:
1384 case 13:
1385 case 14:
1386 case 15:
1387 case 18: /* CRBAL */
1388 case 19: /* CRBAU */
1389 case 20: /* CXBAL */
1390 case 21: /* CXBAU */
1391 case 22: /* NRBAU */
1392 case 23: /* NRBAU */
1393 case 24:
1394 case 25:
1395 case 26:
1396 case 27:
1397 case 28:
1398 case 29:
1399 case 30:
1400 case 31:
1401 case 32:
1402 case 33:
1403 case 34:
1404 case 35:
1405 case 36:
1406 case 37:
1407 case 38:
1408 case 39:
1409 case 40: /* CRBC */
1410 case 41:
1411 case 42: /* CXBC */
1412 case 43:
1413 case 44:
1414 case 45:
1415 case 46: /* POLL */
1416 case 47: /* POLLINT */
1417 case 72:
1418 case 74:
1419 break;
1420 case 76: /* RCVRL */
1421 case 78: /* XMTRL */
1422 val = (val > 0) ? val : 512;
1423 break;
1424 case 112:
1425 if (CSR_STOP(s) || CSR_SPND(s)) {
1426 break;
1427 }
1428 return;
1429 case 3:
1430 break;
1431 case 4:
1432 s->csr[4] &= ~(val & 0x026a);
1433 val &= ~0x026a; val |= s->csr[4] & 0x026a;
1434 break;
1435 case 5:
1436 s->csr[5] &= ~(val & 0x0a90);
1437 val &= ~0x0a90; val |= s->csr[5] & 0x0a90;
1438 break;
1439 case 16:
1440 pcnet_csr_writew(s,1,val);
1441 return;
1442 case 17:
1443 pcnet_csr_writew(s,2,val);
1444 return;
1445 case 58:
1446 pcnet_bcr_writew(s,BCR_SWS,val);
1447 break;
1448 default:
1449 return;
1450 }
1451 s->csr[rap] = val;
1452 }
1453
1454 static uint32_t pcnet_csr_readw(PCNetState *s, uint32_t rap)
1455 {
1456 uint32_t val;
1457 switch (rap) {
1458 case 0:
1459 pcnet_update_irq(s);
1460 val = s->csr[0];
1461 val |= (val & 0x7800) ? 0x8000 : 0;
1462 break;
1463 case 16:
1464 return pcnet_csr_readw(s,1);
1465 case 17:
1466 return pcnet_csr_readw(s,2);
1467 case 58:
1468 return pcnet_bcr_readw(s,BCR_SWS);
1469 case 88:
1470 val = s->csr[89];
1471 val <<= 16;
1472 val |= s->csr[88];
1473 break;
1474 default:
1475 val = s->csr[rap];
1476 }
1477 #ifdef PCNET_DEBUG_CSR
1478 printf("pcnet_csr_readw rap=%d val=0x%04x\n", rap, val);
1479 #endif
1480 return val;
1481 }
1482
1483 static void pcnet_bcr_writew(PCNetState *s, uint32_t rap, uint32_t val)
1484 {
1485 rap &= 127;
1486 #ifdef PCNET_DEBUG_BCR
1487 printf("pcnet_bcr_writew rap=%d val=0x%04x\n", rap, val);
1488 #endif
1489 switch (rap) {
1490 case BCR_SWS:
1491 if (!(CSR_STOP(s) || CSR_SPND(s)))
1492 return;
1493 val &= ~0x0300;
1494 switch (val & 0x00ff) {
1495 case 0:
1496 val |= 0x0200;
1497 break;
1498 case 1:
1499 val |= 0x0100;
1500 break;
1501 case 2:
1502 case 3:
1503 val |= 0x0300;
1504 break;
1505 default:
1506 qemu_log_mask(LOG_GUEST_ERROR, "pcnet: Bad SWSTYLE=0x%02x\n",
1507 val & 0xff);
1508 val = 0x0200;
1509 break;
1510 }
1511 #ifdef PCNET_DEBUG
1512 printf("BCR_SWS=0x%04x\n", val);
1513 #endif
1514 /* fall through */
1515 case BCR_LNKST:
1516 case BCR_LED1:
1517 case BCR_LED2:
1518 case BCR_LED3:
1519 case BCR_MC:
1520 case BCR_FDC:
1521 case BCR_BSBC:
1522 case BCR_EECAS:
1523 case BCR_PLAT:
1524 s->bcr[rap] = val;
1525 break;
1526 default:
1527 break;
1528 }
1529 }
1530
1531 uint32_t pcnet_bcr_readw(PCNetState *s, uint32_t rap)
1532 {
1533 uint32_t val;
1534 rap &= 127;
1535 switch (rap) {
1536 case BCR_LNKST:
1537 case BCR_LED1:
1538 case BCR_LED2:
1539 case BCR_LED3:
1540 val = s->bcr[rap] & ~0x8000;
1541 val |= (val & 0x017f & s->lnkst) ? 0x8000 : 0;
1542 break;
1543 default:
1544 val = rap < 32 ? s->bcr[rap] : 0;
1545 break;
1546 }
1547 #ifdef PCNET_DEBUG_BCR
1548 printf("pcnet_bcr_readw rap=%d val=0x%04x\n", rap, val);
1549 #endif
1550 return val;
1551 }
1552
1553 void pcnet_h_reset(void *opaque)
1554 {
1555 PCNetState *s = opaque;
1556
1557 s->bcr[BCR_MSRDA] = 0x0005;
1558 s->bcr[BCR_MSWRA] = 0x0005;
1559 s->bcr[BCR_MC ] = 0x0002;
1560 s->bcr[BCR_LNKST] = 0x00c0;
1561 s->bcr[BCR_LED1 ] = 0x0084;
1562 s->bcr[BCR_LED2 ] = 0x0088;
1563 s->bcr[BCR_LED3 ] = 0x0090;
1564 s->bcr[BCR_FDC ] = 0x0000;
1565 s->bcr[BCR_BSBC ] = 0x9001;
1566 s->bcr[BCR_EECAS] = 0x0002;
1567 s->bcr[BCR_SWS ] = 0x0200;
1568 s->bcr[BCR_PLAT ] = 0xff06;
1569
1570 pcnet_s_reset(s);
1571 pcnet_update_irq(s);
1572 pcnet_poll_timer(s);
1573 }
1574
1575 void pcnet_ioport_writew(void *opaque, uint32_t addr, uint32_t val)
1576 {
1577 PCNetState *s = opaque;
1578 pcnet_poll_timer(s);
1579 #ifdef PCNET_DEBUG_IO
1580 printf("pcnet_ioport_writew addr=0x%08x val=0x%04x\n", addr, val);
1581 #endif
1582 if (!BCR_DWIO(s)) {
1583 switch (addr & 0x0f) {
1584 case 0x00: /* RDP */
1585 pcnet_csr_writew(s, s->rap, val);
1586 break;
1587 case 0x02:
1588 s->rap = val & 0x7f;
1589 break;
1590 case 0x06:
1591 pcnet_bcr_writew(s, s->rap, val);
1592 break;
1593 }
1594 }
1595 pcnet_update_irq(s);
1596 }
1597
1598 uint32_t pcnet_ioport_readw(void *opaque, uint32_t addr)
1599 {
1600 PCNetState *s = opaque;
1601 uint32_t val = -1;
1602 pcnet_poll_timer(s);
1603 if (!BCR_DWIO(s)) {
1604 switch (addr & 0x0f) {
1605 case 0x00: /* RDP */
1606 val = pcnet_csr_readw(s, s->rap);
1607 break;
1608 case 0x02:
1609 val = s->rap;
1610 break;
1611 case 0x04:
1612 pcnet_s_reset(s);
1613 val = 0;
1614 break;
1615 case 0x06:
1616 val = pcnet_bcr_readw(s, s->rap);
1617 break;
1618 }
1619 }
1620 pcnet_update_irq(s);
1621 #ifdef PCNET_DEBUG_IO
1622 printf("pcnet_ioport_readw addr=0x%08x val=0x%04x\n", addr, val & 0xffff);
1623 #endif
1624 return val;
1625 }
1626
1627 void pcnet_ioport_writel(void *opaque, uint32_t addr, uint32_t val)
1628 {
1629 PCNetState *s = opaque;
1630 pcnet_poll_timer(s);
1631 #ifdef PCNET_DEBUG_IO
1632 printf("pcnet_ioport_writel addr=0x%08x val=0x%08x\n", addr, val);
1633 #endif
1634 if (BCR_DWIO(s)) {
1635 switch (addr & 0x0f) {
1636 case 0x00: /* RDP */
1637 pcnet_csr_writew(s, s->rap, val & 0xffff);
1638 break;
1639 case 0x04:
1640 s->rap = val & 0x7f;
1641 break;
1642 case 0x0c:
1643 pcnet_bcr_writew(s, s->rap, val & 0xffff);
1644 break;
1645 }
1646 } else if ((addr & 0x0f) == 0) {
1647 /* switch device to dword i/o mode */
1648 pcnet_bcr_writew(s, BCR_BSBC, pcnet_bcr_readw(s, BCR_BSBC) | 0x0080);
1649 #ifdef PCNET_DEBUG_IO
1650 printf("device switched into dword i/o mode\n");
1651 #endif
1652 }
1653 pcnet_update_irq(s);
1654 }
1655
1656 uint32_t pcnet_ioport_readl(void *opaque, uint32_t addr)
1657 {
1658 PCNetState *s = opaque;
1659 uint32_t val = -1;
1660 pcnet_poll_timer(s);
1661 if (BCR_DWIO(s)) {
1662 switch (addr & 0x0f) {
1663 case 0x00: /* RDP */
1664 val = pcnet_csr_readw(s, s->rap);
1665 break;
1666 case 0x04:
1667 val = s->rap;
1668 break;
1669 case 0x08:
1670 pcnet_s_reset(s);
1671 val = 0;
1672 break;
1673 case 0x0c:
1674 val = pcnet_bcr_readw(s, s->rap);
1675 break;
1676 }
1677 }
1678 pcnet_update_irq(s);
1679 #ifdef PCNET_DEBUG_IO
1680 printf("pcnet_ioport_readl addr=0x%08x val=0x%08x\n", addr, val);
1681 #endif
1682 return val;
1683 }
1684
1685 static bool is_version_2(void *opaque, int version_id)
1686 {
1687 return version_id == 2;
1688 }
1689
1690 const VMStateDescription vmstate_pcnet = {
1691 .name = "pcnet",
1692 .version_id = 3,
1693 .minimum_version_id = 2,
1694 .fields = (VMStateField[]) {
1695 VMSTATE_INT32(rap, PCNetState),
1696 VMSTATE_INT32(isr, PCNetState),
1697 VMSTATE_INT32(lnkst, PCNetState),
1698 VMSTATE_UINT32(rdra, PCNetState),
1699 VMSTATE_UINT32(tdra, PCNetState),
1700 VMSTATE_BUFFER(prom, PCNetState),
1701 VMSTATE_UINT16_ARRAY(csr, PCNetState, 128),
1702 VMSTATE_UINT16_ARRAY(bcr, PCNetState, 32),
1703 VMSTATE_UINT64(timer, PCNetState),
1704 VMSTATE_INT32(xmit_pos, PCNetState),
1705 VMSTATE_BUFFER(buffer, PCNetState),
1706 VMSTATE_UNUSED_TEST(is_version_2, 4),
1707 VMSTATE_INT32(tx_busy, PCNetState),
1708 VMSTATE_TIMER_PTR(poll_timer, PCNetState),
1709 VMSTATE_END_OF_LIST()
1710 }
1711 };
1712
1713 void pcnet_common_init(DeviceState *dev, PCNetState *s, NetClientInfo *info)
1714 {
1715 int i;
1716 uint16_t checksum;
1717
1718 s->poll_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, pcnet_poll_timer, s);
1719
1720 qemu_macaddr_default_if_unset(&s->conf.macaddr);
1721 s->nic = qemu_new_nic(info, &s->conf, object_get_typename(OBJECT(dev)), dev->id, s);
1722 qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a);
1723
1724 /* Initialize the PROM */
1725
1726 /*
1727 Datasheet: http://pdfdata.datasheetsite.com/web/24528/AM79C970A.pdf
1728 page 95
1729 */
1730 memcpy(s->prom, s->conf.macaddr.a, 6);
1731 /* Reserved Location: must be 00h */
1732 s->prom[6] = s->prom[7] = 0x00;
1733 /* Reserved Location: must be 00h */
1734 s->prom[8] = 0x00;
1735 /* Hardware ID: must be 11h if compatibility to AMD drivers is desired */
1736 s->prom[9] = 0x11;
1737 /* User programmable space, init with 0 */
1738 s->prom[10] = s->prom[11] = 0x00;
1739 /* LSByte of two-byte checksum, which is the sum of bytes 00h-0Bh
1740 and bytes 0Eh and 0Fh, must therefore be initialized with 0! */
1741 s->prom[12] = s->prom[13] = 0x00;
1742 /* Must be ASCII W (57h) if compatibility to AMD
1743 driver software is desired */
1744 s->prom[14] = s->prom[15] = 0x57;
1745
1746 for (i = 0, checksum = 0; i < 16; i++) {
1747 checksum += s->prom[i];
1748 }
1749 *(uint16_t *)&s->prom[12] = cpu_to_le16(checksum);
1750
1751 s->lnkst = 0x40; /* initial link state: up */
1752 }
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