2 * Arm PrimeCell PL080/PL081 DMA controller
4 * Copyright (c) 2006 CodeSourcery.
5 * Written by Paul Brook
7 * This code is licensed under the GPL.
10 #include "qemu/osdep.h"
11 #include "hw/sysbus.h"
12 #include "exec/address-spaces.h"
14 #include "hw/dma/pl080.h"
15 #include "qapi/error.h"
17 #define PL080_CONF_E 0x1
18 #define PL080_CONF_M1 0x2
19 #define PL080_CONF_M2 0x4
21 #define PL080_CCONF_H 0x40000
22 #define PL080_CCONF_A 0x20000
23 #define PL080_CCONF_L 0x10000
24 #define PL080_CCONF_ITC 0x08000
25 #define PL080_CCONF_IE 0x04000
26 #define PL080_CCONF_E 0x00001
28 #define PL080_CCTRL_I 0x80000000
29 #define PL080_CCTRL_DI 0x08000000
30 #define PL080_CCTRL_SI 0x04000000
31 #define PL080_CCTRL_D 0x02000000
32 #define PL080_CCTRL_S 0x01000000
34 static const VMStateDescription vmstate_pl080_channel = {
35 .name = "pl080_channel",
37 .minimum_version_id = 1,
38 .fields = (VMStateField[]) {
39 VMSTATE_UINT32(src, pl080_channel),
40 VMSTATE_UINT32(dest, pl080_channel),
41 VMSTATE_UINT32(lli, pl080_channel),
42 VMSTATE_UINT32(ctrl, pl080_channel),
43 VMSTATE_UINT32(conf, pl080_channel),
48 static const VMStateDescription vmstate_pl080 = {
51 .minimum_version_id = 1,
52 .fields = (VMStateField[]) {
53 VMSTATE_UINT8(tc_int, PL080State),
54 VMSTATE_UINT8(tc_mask, PL080State),
55 VMSTATE_UINT8(err_int, PL080State),
56 VMSTATE_UINT8(err_mask, PL080State),
57 VMSTATE_UINT32(conf, PL080State),
58 VMSTATE_UINT32(sync, PL080State),
59 VMSTATE_UINT32(req_single, PL080State),
60 VMSTATE_UINT32(req_burst, PL080State),
61 VMSTATE_UINT8(tc_int, PL080State),
62 VMSTATE_UINT8(tc_int, PL080State),
63 VMSTATE_UINT8(tc_int, PL080State),
64 VMSTATE_STRUCT_ARRAY(chan, PL080State, PL080_MAX_CHANNELS,
65 1, vmstate_pl080_channel, pl080_channel),
66 VMSTATE_INT32(running, PL080State),
71 static const unsigned char pl080_id[] =
72 { 0x80, 0x10, 0x04, 0x0a, 0x0d, 0xf0, 0x05, 0xb1 };
74 static const unsigned char pl081_id[] =
75 { 0x81, 0x10, 0x04, 0x0a, 0x0d, 0xf0, 0x05, 0xb1 };
77 static void pl080_update(PL080State *s)
79 bool tclevel = (s->tc_int & s->tc_mask);
80 bool errlevel = (s->err_int & s->err_mask);
82 qemu_set_irq(s->interr, errlevel);
83 qemu_set_irq(s->inttc, tclevel);
84 qemu_set_irq(s->irq, errlevel || tclevel);
87 static void pl080_run(PL080State *s)
103 for (c = 0; c < s->nchannels; c++) {
104 if (s->chan[c].conf & PL080_CCONF_ITC)
105 s->tc_mask |= 1 << c;
106 if (s->chan[c].conf & PL080_CCONF_IE)
107 s->err_mask |= 1 << c;
110 if ((s->conf & PL080_CONF_E) == 0)
113 hw_error("DMA active\n");
114 /* If we are already in the middle of a DMA operation then indicate that
115 there may be new DMA requests and return immediately. */
122 for (c = 0; c < s->nchannels; c++) {
125 /* Test if thiws channel has any pending DMA requests. */
126 if ((ch->conf & (PL080_CCONF_H | PL080_CCONF_E))
129 flow = (ch->conf >> 11) & 7;
132 "pl080_run: Peripheral flow control not implemented\n");
134 src_id = (ch->conf >> 1) & 0x1f;
135 dest_id = (ch->conf >> 6) & 0x1f;
136 size = ch->ctrl & 0xfff;
137 req = s->req_single | s->req_burst;
142 if ((req & (1u << dest_id)) == 0)
146 if ((req & (1u << src_id)) == 0)
150 if ((req & (1u << src_id)) == 0
151 || (req & (1u << dest_id)) == 0)
158 /* Transfer one element. */
159 /* ??? Should transfer multiple elements for a burst request. */
160 /* ??? Unclear what the proper behavior is when source and
161 destination widths are different. */
162 swidth = 1 << ((ch->ctrl >> 18) & 7);
163 dwidth = 1 << ((ch->ctrl >> 21) & 7);
164 for (n = 0; n < dwidth; n+= swidth) {
165 address_space_read(&s->downstream_as, ch->src,
166 MEMTXATTRS_UNSPECIFIED, buff + n, swidth);
167 if (ch->ctrl & PL080_CCTRL_SI)
170 xsize = (dwidth < swidth) ? swidth : dwidth;
171 /* ??? This may pad the value incorrectly for dwidth < 32. */
172 for (n = 0; n < xsize; n += dwidth) {
173 address_space_write(&s->downstream_as, ch->dest + n,
174 MEMTXATTRS_UNSPECIFIED, buff + n, dwidth);
175 if (ch->ctrl & PL080_CCTRL_DI)
180 ch->ctrl = (ch->ctrl & 0xfffff000) | size;
182 /* Transfer complete. */
184 ch->src = address_space_ldl_le(&s->downstream_as,
186 MEMTXATTRS_UNSPECIFIED,
188 ch->dest = address_space_ldl_le(&s->downstream_as,
190 MEMTXATTRS_UNSPECIFIED,
192 ch->ctrl = address_space_ldl_le(&s->downstream_as,
194 MEMTXATTRS_UNSPECIFIED,
196 ch->lli = address_space_ldl_le(&s->downstream_as,
198 MEMTXATTRS_UNSPECIFIED,
201 ch->conf &= ~PL080_CCONF_E;
203 if (ch->ctrl & PL080_CCTRL_I) {
214 static uint64_t pl080_read(void *opaque, hwaddr offset,
217 PL080State *s = (PL080State *)opaque;
221 if (offset >= 0xfe0 && offset < 0x1000) {
222 if (s->nchannels == 8) {
223 return pl080_id[(offset - 0xfe0) >> 2];
225 return pl081_id[(offset - 0xfe0) >> 2];
228 if (offset >= 0x100 && offset < 0x200) {
229 i = (offset & 0xe0) >> 5;
230 if (i >= s->nchannels)
232 switch ((offset >> 2) & 7) {
233 case 0: /* SrcAddr */
234 return s->chan[i].src;
235 case 1: /* DestAddr */
236 return s->chan[i].dest;
238 return s->chan[i].lli;
239 case 3: /* Control */
240 return s->chan[i].ctrl;
241 case 4: /* Configuration */
242 return s->chan[i].conf;
247 switch (offset >> 2) {
248 case 0: /* IntStatus */
249 return (s->tc_int & s->tc_mask) | (s->err_int & s->err_mask);
250 case 1: /* IntTCStatus */
251 return (s->tc_int & s->tc_mask);
252 case 3: /* IntErrorStatus */
253 return (s->err_int & s->err_mask);
254 case 5: /* RawIntTCStatus */
256 case 6: /* RawIntErrorStatus */
258 case 7: /* EnbldChns */
260 for (i = 0; i < s->nchannels; i++) {
261 if (s->chan[i].conf & PL080_CCONF_E)
265 case 8: /* SoftBReq */
266 case 9: /* SoftSReq */
267 case 10: /* SoftLBReq */
268 case 11: /* SoftLSReq */
269 /* ??? Implement these. */
271 case 12: /* Configuration */
277 qemu_log_mask(LOG_GUEST_ERROR,
278 "pl080_read: Bad offset %x\n", (int)offset);
283 static void pl080_write(void *opaque, hwaddr offset,
284 uint64_t value, unsigned size)
286 PL080State *s = (PL080State *)opaque;
289 if (offset >= 0x100 && offset < 0x200) {
290 i = (offset & 0xe0) >> 5;
291 if (i >= s->nchannels)
293 switch ((offset >> 2) & 7) {
294 case 0: /* SrcAddr */
295 s->chan[i].src = value;
297 case 1: /* DestAddr */
298 s->chan[i].dest = value;
301 s->chan[i].lli = value;
303 case 3: /* Control */
304 s->chan[i].ctrl = value;
306 case 4: /* Configuration */
307 s->chan[i].conf = value;
313 switch (offset >> 2) {
314 case 2: /* IntTCClear */
317 case 4: /* IntErrorClear */
318 s->err_int &= ~value;
320 case 8: /* SoftBReq */
321 case 9: /* SoftSReq */
322 case 10: /* SoftLBReq */
323 case 11: /* SoftLSReq */
324 /* ??? Implement these. */
325 qemu_log_mask(LOG_UNIMP, "pl080_write: Soft DMA not implemented\n");
327 case 12: /* Configuration */
329 if (s->conf & (PL080_CONF_M1 | PL080_CONF_M2)) {
330 qemu_log_mask(LOG_UNIMP,
331 "pl080_write: Big-endian DMA not implemented\n");
340 qemu_log_mask(LOG_GUEST_ERROR,
341 "pl080_write: Bad offset %x\n", (int)offset);
346 static const MemoryRegionOps pl080_ops = {
348 .write = pl080_write,
349 .endianness = DEVICE_NATIVE_ENDIAN,
352 static void pl080_reset(DeviceState *dev)
354 PL080State *s = PL080(dev);
367 for (i = 0; i < s->nchannels; i++) {
376 static void pl080_init(Object *obj)
378 SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
379 PL080State *s = PL080(obj);
381 memory_region_init_io(&s->iomem, OBJECT(s), &pl080_ops, s, "pl080", 0x1000);
382 sysbus_init_mmio(sbd, &s->iomem);
383 sysbus_init_irq(sbd, &s->irq);
384 sysbus_init_irq(sbd, &s->interr);
385 sysbus_init_irq(sbd, &s->inttc);
389 static void pl080_realize(DeviceState *dev, Error **errp)
391 PL080State *s = PL080(dev);
393 if (!s->downstream) {
394 error_setg(errp, "PL080 'downstream' link not set");
398 address_space_init(&s->downstream_as, s->downstream, "pl080-downstream");
401 static void pl081_init(Object *obj)
403 PL080State *s = PL080(obj);
408 static Property pl080_properties[] = {
409 DEFINE_PROP_LINK("downstream", PL080State, downstream,
410 TYPE_MEMORY_REGION, MemoryRegion *),
411 DEFINE_PROP_END_OF_LIST(),
414 static void pl080_class_init(ObjectClass *oc, void *data)
416 DeviceClass *dc = DEVICE_CLASS(oc);
418 dc->vmsd = &vmstate_pl080;
419 dc->realize = pl080_realize;
420 dc->props = pl080_properties;
421 dc->reset = pl080_reset;
424 static const TypeInfo pl080_info = {
426 .parent = TYPE_SYS_BUS_DEVICE,
427 .instance_size = sizeof(PL080State),
428 .instance_init = pl080_init,
429 .class_init = pl080_class_init,
432 static const TypeInfo pl081_info = {
434 .parent = TYPE_PL080,
435 .instance_init = pl081_init,
438 /* The PL080 and PL081 are the same except for the number of channels
439 they implement (8 and 2 respectively). */
440 static void pl080_register_types(void)
442 type_register_static(&pl080_info);
443 type_register_static(&pl081_info);
446 type_init(pl080_register_types)