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.
12 #define PL080_MAX_CHANNELS 8
13 #define PL080_CONF_E 0x1
14 #define PL080_CONF_M1 0x2
15 #define PL080_CONF_M2 0x4
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
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
48 pl080_channel chan[PL080_MAX_CHANNELS];
50 /* Flag to avoid recursive DMA invocations. */
55 static const VMStateDescription vmstate_pl080_channel = {
56 .name = "pl080_channel",
58 .minimum_version_id = 1,
59 .fields = (VMStateField[]) {
60 VMSTATE_UINT32(src, pl080_channel),
61 VMSTATE_UINT32(dest, pl080_channel),
62 VMSTATE_UINT32(lli, pl080_channel),
63 VMSTATE_UINT32(ctrl, pl080_channel),
64 VMSTATE_UINT32(conf, pl080_channel),
69 static const VMStateDescription vmstate_pl080 = {
72 .minimum_version_id = 1,
73 .fields = (VMStateField[]) {
74 VMSTATE_UINT8(tc_int, pl080_state),
75 VMSTATE_UINT8(tc_mask, pl080_state),
76 VMSTATE_UINT8(err_int, pl080_state),
77 VMSTATE_UINT8(err_mask, pl080_state),
78 VMSTATE_UINT32(conf, pl080_state),
79 VMSTATE_UINT32(sync, pl080_state),
80 VMSTATE_UINT32(req_single, pl080_state),
81 VMSTATE_UINT32(req_burst, pl080_state),
82 VMSTATE_UINT8(tc_int, pl080_state),
83 VMSTATE_UINT8(tc_int, pl080_state),
84 VMSTATE_UINT8(tc_int, pl080_state),
85 VMSTATE_STRUCT_ARRAY(chan, pl080_state, PL080_MAX_CHANNELS,
86 1, vmstate_pl080_channel, pl080_channel),
87 VMSTATE_INT32(running, pl080_state),
92 static const unsigned char pl080_id[] =
93 { 0x80, 0x10, 0x04, 0x0a, 0x0d, 0xf0, 0x05, 0xb1 };
95 static const unsigned char pl081_id[] =
96 { 0x81, 0x10, 0x04, 0x0a, 0x0d, 0xf0, 0x05, 0xb1 };
98 static void pl080_update(pl080_state *s)
100 if ((s->tc_int & s->tc_mask)
101 || (s->err_int & s->err_mask))
102 qemu_irq_raise(s->irq);
104 qemu_irq_lower(s->irq);
107 static void pl080_run(pl080_state *s)
123 for (c = 0; c < s->nchannels; c++) {
124 if (s->chan[c].conf & PL080_CCONF_ITC)
125 s->tc_mask |= 1 << c;
126 if (s->chan[c].conf & PL080_CCONF_IE)
127 s->err_mask |= 1 << c;
130 if ((s->conf & PL080_CONF_E) == 0)
133 hw_error("DMA active\n");
134 /* If we are already in the middle of a DMA operation then indicate that
135 there may be new DMA requests and return immediately. */
142 for (c = 0; c < s->nchannels; c++) {
145 /* Test if thiws channel has any pending DMA requests. */
146 if ((ch->conf & (PL080_CCONF_H | PL080_CCONF_E))
149 flow = (ch->conf >> 11) & 7;
152 "pl080_run: Peripheral flow control not implemented\n");
154 src_id = (ch->conf >> 1) & 0x1f;
155 dest_id = (ch->conf >> 6) & 0x1f;
156 size = ch->ctrl & 0xfff;
157 req = s->req_single | s->req_burst;
162 if ((req & (1u << dest_id)) == 0)
166 if ((req & (1u << src_id)) == 0)
170 if ((req & (1u << src_id)) == 0
171 || (req & (1u << dest_id)) == 0)
178 /* Transfer one element. */
179 /* ??? Should transfer multiple elements for a burst request. */
180 /* ??? Unclear what the proper behavior is when source and
181 destination widths are different. */
182 swidth = 1 << ((ch->ctrl >> 18) & 7);
183 dwidth = 1 << ((ch->ctrl >> 21) & 7);
184 for (n = 0; n < dwidth; n+= swidth) {
185 cpu_physical_memory_read(ch->src, buff + n, swidth);
186 if (ch->ctrl & PL080_CCTRL_SI)
189 xsize = (dwidth < swidth) ? swidth : dwidth;
190 /* ??? This may pad the value incorrectly for dwidth < 32. */
191 for (n = 0; n < xsize; n += dwidth) {
192 cpu_physical_memory_write(ch->dest + n, buff + n, dwidth);
193 if (ch->ctrl & PL080_CCTRL_DI)
198 ch->ctrl = (ch->ctrl & 0xfffff000) | size;
200 /* Transfer complete. */
202 ch->src = ldl_le_phys(ch->lli);
203 ch->dest = ldl_le_phys(ch->lli + 4);
204 ch->ctrl = ldl_le_phys(ch->lli + 12);
205 ch->lli = ldl_le_phys(ch->lli + 8);
207 ch->conf &= ~PL080_CCONF_E;
209 if (ch->ctrl & PL080_CCTRL_I) {
220 static uint32_t pl080_read(void *opaque, target_phys_addr_t offset)
222 pl080_state *s = (pl080_state *)opaque;
226 if (offset >= 0xfe0 && offset < 0x1000) {
227 if (s->nchannels == 8) {
228 return pl080_id[(offset - 0xfe0) >> 2];
230 return pl081_id[(offset - 0xfe0) >> 2];
233 if (offset >= 0x100 && offset < 0x200) {
234 i = (offset & 0xe0) >> 5;
235 if (i >= s->nchannels)
237 switch (offset >> 2) {
238 case 0: /* SrcAddr */
239 return s->chan[i].src;
240 case 1: /* DestAddr */
241 return s->chan[i].dest;
243 return s->chan[i].lli;
244 case 3: /* Control */
245 return s->chan[i].ctrl;
246 case 4: /* Configuration */
247 return s->chan[i].conf;
252 switch (offset >> 2) {
253 case 0: /* IntStatus */
254 return (s->tc_int & s->tc_mask) | (s->err_int & s->err_mask);
255 case 1: /* IntTCStatus */
256 return (s->tc_int & s->tc_mask);
257 case 3: /* IntErrorStatus */
258 return (s->err_int & s->err_mask);
259 case 5: /* RawIntTCStatus */
261 case 6: /* RawIntErrorStatus */
263 case 7: /* EnbldChns */
265 for (i = 0; i < s->nchannels; i++) {
266 if (s->chan[i].conf & PL080_CCONF_E)
270 case 8: /* SoftBReq */
271 case 9: /* SoftSReq */
272 case 10: /* SoftLBReq */
273 case 11: /* SoftLSReq */
274 /* ??? Implement these. */
276 case 12: /* Configuration */
282 hw_error("pl080_read: Bad offset %x\n", (int)offset);
287 static void pl080_write(void *opaque, target_phys_addr_t offset,
290 pl080_state *s = (pl080_state *)opaque;
293 if (offset >= 0x100 && offset < 0x200) {
294 i = (offset & 0xe0) >> 5;
295 if (i >= s->nchannels)
297 switch (offset >> 2) {
298 case 0: /* SrcAddr */
299 s->chan[i].src = value;
301 case 1: /* DestAddr */
302 s->chan[i].dest = value;
305 s->chan[i].lli = value;
307 case 3: /* Control */
308 s->chan[i].ctrl = value;
310 case 4: /* Configuration */
311 s->chan[i].conf = value;
316 switch (offset >> 2) {
317 case 2: /* IntTCClear */
320 case 4: /* IntErrorClear */
321 s->err_int &= ~value;
323 case 8: /* SoftBReq */
324 case 9: /* SoftSReq */
325 case 10: /* SoftLBReq */
326 case 11: /* SoftLSReq */
327 /* ??? Implement these. */
328 hw_error("pl080_write: Soft DMA not implemented\n");
330 case 12: /* Configuration */
332 if (s->conf & (PL080_CONF_M1 | PL080_CONF_M1)) {
333 hw_error("pl080_write: Big-endian DMA not implemented\n");
342 hw_error("pl080_write: Bad offset %x\n", (int)offset);
347 static CPUReadMemoryFunc * const pl080_readfn[] = {
353 static CPUWriteMemoryFunc * const pl080_writefn[] = {
359 static int pl08x_init(SysBusDevice *dev, int nchannels)
362 pl080_state *s = FROM_SYSBUS(pl080_state, dev);
364 iomemtype = cpu_register_io_memory(pl080_readfn,
366 DEVICE_NATIVE_ENDIAN);
367 sysbus_init_mmio(dev, 0x1000, iomemtype);
368 sysbus_init_irq(dev, &s->irq);
369 s->nchannels = nchannels;
373 static int pl080_init(SysBusDevice *dev)
375 return pl08x_init(dev, 8);
378 static int pl081_init(SysBusDevice *dev)
380 return pl08x_init(dev, 2);
383 static SysBusDeviceInfo pl080_info = {
385 .qdev.name = "pl080",
386 .qdev.size = sizeof(pl080_state),
387 .qdev.vmsd = &vmstate_pl080,
391 static SysBusDeviceInfo pl081_info = {
393 .qdev.name = "pl081",
394 .qdev.size = sizeof(pl080_state),
395 .qdev.vmsd = &vmstate_pl080,
399 /* The PL080 and PL081 are the same except for the number of channels
400 they implement (8 and 2 respectively). */
401 static void pl080_register_devices(void)
403 sysbus_register_withprop(&pl080_info);
404 sysbus_register_withprop(&pl081_info);
407 device_init(pl080_register_devices)