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10#include "sysbus.h"
11
12#define PL080_MAX_CHANNELS 8
13#define PL080_CONF_E 0x1
14#define PL080_CONF_M1 0x2
15#define PL080_CONF_M2 0x4
16
17#define PL080_CCONF_H 0x40000
18#define PL080_CCONF_A 0x20000
19#define PL080_CCONF_L 0x10000
20#define PL080_CCONF_ITC 0x08000
21#define PL080_CCONF_IE 0x04000
22#define PL080_CCONF_E 0x00001
23
24#define PL080_CCTRL_I 0x80000000
25#define PL080_CCTRL_DI 0x08000000
26#define PL080_CCTRL_SI 0x04000000
27#define PL080_CCTRL_D 0x02000000
28#define PL080_CCTRL_S 0x01000000
29
30typedef struct {
31 uint32_t src;
32 uint32_t dest;
33 uint32_t lli;
34 uint32_t ctrl;
35 uint32_t conf;
36} pl080_channel;
37
38typedef struct {
39 SysBusDevice busdev;
40 MemoryRegion iomem;
41 uint8_t tc_int;
42 uint8_t tc_mask;
43 uint8_t err_int;
44 uint8_t err_mask;
45 uint32_t conf;
46 uint32_t sync;
47 uint32_t req_single;
48 uint32_t req_burst;
49 pl080_channel chan[PL080_MAX_CHANNELS];
50 int nchannels;
51
52 int running;
53 qemu_irq irq;
54} pl080_state;
55
56static const VMStateDescription vmstate_pl080_channel = {
57 .name = "pl080_channel",
58 .version_id = 1,
59 .minimum_version_id = 1,
60 .fields = (VMStateField[]) {
61 VMSTATE_UINT32(src, pl080_channel),
62 VMSTATE_UINT32(dest, pl080_channel),
63 VMSTATE_UINT32(lli, pl080_channel),
64 VMSTATE_UINT32(ctrl, pl080_channel),
65 VMSTATE_UINT32(conf, pl080_channel),
66 VMSTATE_END_OF_LIST()
67 }
68};
69
70static const VMStateDescription vmstate_pl080 = {
71 .name = "pl080",
72 .version_id = 1,
73 .minimum_version_id = 1,
74 .fields = (VMStateField[]) {
75 VMSTATE_UINT8(tc_int, pl080_state),
76 VMSTATE_UINT8(tc_mask, pl080_state),
77 VMSTATE_UINT8(err_int, pl080_state),
78 VMSTATE_UINT8(err_mask, pl080_state),
79 VMSTATE_UINT32(conf, pl080_state),
80 VMSTATE_UINT32(sync, pl080_state),
81 VMSTATE_UINT32(req_single, pl080_state),
82 VMSTATE_UINT32(req_burst, pl080_state),
83 VMSTATE_UINT8(tc_int, pl080_state),
84 VMSTATE_UINT8(tc_int, pl080_state),
85 VMSTATE_UINT8(tc_int, pl080_state),
86 VMSTATE_STRUCT_ARRAY(chan, pl080_state, PL080_MAX_CHANNELS,
87 1, vmstate_pl080_channel, pl080_channel),
88 VMSTATE_INT32(running, pl080_state),
89 VMSTATE_END_OF_LIST()
90 }
91};
92
93static const unsigned char pl080_id[] =
94{ 0x80, 0x10, 0x04, 0x0a, 0x0d, 0xf0, 0x05, 0xb1 };
95
96static const unsigned char pl081_id[] =
97{ 0x81, 0x10, 0x04, 0x0a, 0x0d, 0xf0, 0x05, 0xb1 };
98
99static void pl080_update(pl080_state *s)
100{
101 if ((s->tc_int & s->tc_mask)
102 || (s->err_int & s->err_mask))
103 qemu_irq_raise(s->irq);
104 else
105 qemu_irq_lower(s->irq);
106}
107
108static void pl080_run(pl080_state *s)
109{
110 int c;
111 int flow;
112 pl080_channel *ch;
113 int swidth;
114 int dwidth;
115 int xsize;
116 int n;
117 int src_id;
118 int dest_id;
119 int size;
120 uint8_t buff[4];
121 uint32_t req;
122
123 s->tc_mask = 0;
124 for (c = 0; c < s->nchannels; c++) {
125 if (s->chan[c].conf & PL080_CCONF_ITC)
126 s->tc_mask |= 1 << c;
127 if (s->chan[c].conf & PL080_CCONF_IE)
128 s->err_mask |= 1 << c;
129 }
130
131 if ((s->conf & PL080_CONF_E) == 0)
132 return;
133
134hw_error("DMA active\n");
135
136
137 if (s->running) {
138 s->running++;
139 return;
140 }
141 s->running = 1;
142 while (s->running) {
143 for (c = 0; c < s->nchannels; c++) {
144 ch = &s->chan[c];
145again:
146
147 if ((ch->conf & (PL080_CCONF_H | PL080_CCONF_E))
148 != PL080_CCONF_E)
149 continue;
150 flow = (ch->conf >> 11) & 7;
151 if (flow >= 4) {
152 hw_error(
153 "pl080_run: Peripheral flow control not implemented\n");
154 }
155 src_id = (ch->conf >> 1) & 0x1f;
156 dest_id = (ch->conf >> 6) & 0x1f;
157 size = ch->ctrl & 0xfff;
158 req = s->req_single | s->req_burst;
159 switch (flow) {
160 case 0:
161 break;
162 case 1:
163 if ((req & (1u << dest_id)) == 0)
164 size = 0;
165 break;
166 case 2:
167 if ((req & (1u << src_id)) == 0)
168 size = 0;
169 break;
170 case 3:
171 if ((req & (1u << src_id)) == 0
172 || (req & (1u << dest_id)) == 0)
173 size = 0;
174 break;
175 }
176 if (!size)
177 continue;
178
179
180
181
182
183 swidth = 1 << ((ch->ctrl >> 18) & 7);
184 dwidth = 1 << ((ch->ctrl >> 21) & 7);
185 for (n = 0; n < dwidth; n+= swidth) {
186 cpu_physical_memory_read(ch->src, buff + n, swidth);
187 if (ch->ctrl & PL080_CCTRL_SI)
188 ch->src += swidth;
189 }
190 xsize = (dwidth < swidth) ? swidth : dwidth;
191
192 for (n = 0; n < xsize; n += dwidth) {
193 cpu_physical_memory_write(ch->dest + n, buff + n, dwidth);
194 if (ch->ctrl & PL080_CCTRL_DI)
195 ch->dest += swidth;
196 }
197
198 size--;
199 ch->ctrl = (ch->ctrl & 0xfffff000) | size;
200 if (size == 0) {
201
202 if (ch->lli) {
203 ch->src = ldl_le_phys(ch->lli);
204 ch->dest = ldl_le_phys(ch->lli + 4);
205 ch->ctrl = ldl_le_phys(ch->lli + 12);
206 ch->lli = ldl_le_phys(ch->lli + 8);
207 } else {
208 ch->conf &= ~PL080_CCONF_E;
209 }
210 if (ch->ctrl & PL080_CCTRL_I) {
211 s->tc_int |= 1 << c;
212 }
213 }
214 goto again;
215 }
216 if (--s->running)
217 s->running = 1;
218 }
219}
220
221static uint64_t pl080_read(void *opaque, hwaddr offset,
222 unsigned size)
223{
224 pl080_state *s = (pl080_state *)opaque;
225 uint32_t i;
226 uint32_t mask;
227
228 if (offset >= 0xfe0 && offset < 0x1000) {
229 if (s->nchannels == 8) {
230 return pl080_id[(offset - 0xfe0) >> 2];
231 } else {
232 return pl081_id[(offset - 0xfe0) >> 2];
233 }
234 }
235 if (offset >= 0x100 && offset < 0x200) {
236 i = (offset & 0xe0) >> 5;
237 if (i >= s->nchannels)
238 goto bad_offset;
239 switch (offset >> 2) {
240 case 0:
241 return s->chan[i].src;
242 case 1:
243 return s->chan[i].dest;
244 case 2:
245 return s->chan[i].lli;
246 case 3:
247 return s->chan[i].ctrl;
248 case 4:
249 return s->chan[i].conf;
250 default:
251 goto bad_offset;
252 }
253 }
254 switch (offset >> 2) {
255 case 0:
256 return (s->tc_int & s->tc_mask) | (s->err_int & s->err_mask);
257 case 1:
258 return (s->tc_int & s->tc_mask);
259 case 3:
260 return (s->err_int & s->err_mask);
261 case 5:
262 return s->tc_int;
263 case 6:
264 return s->err_int;
265 case 7:
266 mask = 0;
267 for (i = 0; i < s->nchannels; i++) {
268 if (s->chan[i].conf & PL080_CCONF_E)
269 mask |= 1 << i;
270 }
271 return mask;
272 case 8:
273 case 9:
274 case 10:
275 case 11:
276
277 return 0;
278 case 12:
279 return s->conf;
280 case 13:
281 return s->sync;
282 default:
283 bad_offset:
284 qemu_log_mask(LOG_GUEST_ERROR,
285 "pl080_read: Bad offset %x\n", (int)offset);
286 return 0;
287 }
288}
289
290static void pl080_write(void *opaque, hwaddr offset,
291 uint64_t value, unsigned size)
292{
293 pl080_state *s = (pl080_state *)opaque;
294 int i;
295
296 if (offset >= 0x100 && offset < 0x200) {
297 i = (offset & 0xe0) >> 5;
298 if (i >= s->nchannels)
299 goto bad_offset;
300 switch (offset >> 2) {
301 case 0:
302 s->chan[i].src = value;
303 break;
304 case 1:
305 s->chan[i].dest = value;
306 break;
307 case 2:
308 s->chan[i].lli = value;
309 break;
310 case 3:
311 s->chan[i].ctrl = value;
312 break;
313 case 4:
314 s->chan[i].conf = value;
315 pl080_run(s);
316 break;
317 }
318 }
319 switch (offset >> 2) {
320 case 2:
321 s->tc_int &= ~value;
322 break;
323 case 4:
324 s->err_int &= ~value;
325 break;
326 case 8:
327 case 9:
328 case 10:
329 case 11:
330
331 qemu_log_mask(LOG_UNIMP, "pl080_write: Soft DMA not implemented\n");
332 break;
333 case 12:
334 s->conf = value;
335 if (s->conf & (PL080_CONF_M1 | PL080_CONF_M1)) {
336 qemu_log_mask(LOG_UNIMP,
337 "pl080_write: Big-endian DMA not implemented\n");
338 }
339 pl080_run(s);
340 break;
341 case 13:
342 s->sync = value;
343 break;
344 default:
345 bad_offset:
346 qemu_log_mask(LOG_GUEST_ERROR,
347 "pl080_write: Bad offset %x\n", (int)offset);
348 }
349 pl080_update(s);
350}
351
352static const MemoryRegionOps pl080_ops = {
353 .read = pl080_read,
354 .write = pl080_write,
355 .endianness = DEVICE_NATIVE_ENDIAN,
356};
357
358static int pl08x_init(SysBusDevice *dev, int nchannels)
359{
360 pl080_state *s = FROM_SYSBUS(pl080_state, dev);
361
362 memory_region_init_io(&s->iomem, &pl080_ops, s, "pl080", 0x1000);
363 sysbus_init_mmio(dev, &s->iomem);
364 sysbus_init_irq(dev, &s->irq);
365 s->nchannels = nchannels;
366 return 0;
367}
368
369static int pl080_init(SysBusDevice *dev)
370{
371 return pl08x_init(dev, 8);
372}
373
374static int pl081_init(SysBusDevice *dev)
375{
376 return pl08x_init(dev, 2);
377}
378
379static void pl080_class_init(ObjectClass *klass, void *data)
380{
381 DeviceClass *dc = DEVICE_CLASS(klass);
382 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
383
384 k->init = pl080_init;
385 dc->no_user = 1;
386 dc->vmsd = &vmstate_pl080;
387}
388
389static TypeInfo pl080_info = {
390 .name = "pl080",
391 .parent = TYPE_SYS_BUS_DEVICE,
392 .instance_size = sizeof(pl080_state),
393 .class_init = pl080_class_init,
394};
395
396static void pl081_class_init(ObjectClass *klass, void *data)
397{
398 DeviceClass *dc = DEVICE_CLASS(klass);
399 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
400
401 k->init = pl081_init;
402 dc->no_user = 1;
403 dc->vmsd = &vmstate_pl080;
404}
405
406static TypeInfo pl081_info = {
407 .name = "pl081",
408 .parent = TYPE_SYS_BUS_DEVICE,
409 .instance_size = sizeof(pl080_state),
410 .class_init = pl081_class_init,
411};
412
413
414
415static void pl080_register_types(void)
416{
417 type_register_static(&pl080_info);
418 type_register_static(&pl081_info);
419}
420
421type_init(pl080_register_types)
422
