2 * QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator
4 * PAPR Virtualized Interrupt System, aka ICS/ICP aka xics
6 * Copyright (c) 2010,2011 David Gibson, IBM Corporation.
8 * Permission is hereby granted, free of charge, to any person obtaining a copy
9 * of this software and associated documentation files (the "Software"), to deal
10 * in the Software without restriction, including without limitation the rights
11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12 * copies of the Software, and to permit persons to whom the Software is
13 * furnished to do so, subject to the following conditions:
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
28 #include "qemu/osdep.h"
32 #include "qemu/timer.h"
33 #include "hw/ppc/spapr.h"
34 #include "hw/ppc/xics.h"
35 #include "qapi/visitor.h"
36 #include "qapi/error.h"
42 static target_ulong h_cppr(PowerPCCPU *cpu, sPAPRMachineState *spapr,
43 target_ulong opcode, target_ulong *args)
45 CPUState *cs = CPU(cpu);
46 target_ulong cppr = args[0];
48 icp_set_cppr(spapr->xics, cs->cpu_index, cppr);
52 static target_ulong h_ipi(PowerPCCPU *cpu, sPAPRMachineState *spapr,
53 target_ulong opcode, target_ulong *args)
55 target_ulong server = xics_get_cpu_index_by_dt_id(args[0]);
56 target_ulong mfrr = args[1];
58 if (server >= spapr->xics->nr_servers) {
62 icp_set_mfrr(spapr->xics, server, mfrr);
66 static target_ulong h_xirr(PowerPCCPU *cpu, sPAPRMachineState *spapr,
67 target_ulong opcode, target_ulong *args)
69 CPUState *cs = CPU(cpu);
70 uint32_t xirr = icp_accept(spapr->xics->ss + cs->cpu_index);
76 static target_ulong h_xirr_x(PowerPCCPU *cpu, sPAPRMachineState *spapr,
77 target_ulong opcode, target_ulong *args)
79 CPUState *cs = CPU(cpu);
80 ICPState *ss = &spapr->xics->ss[cs->cpu_index];
81 uint32_t xirr = icp_accept(ss);
84 args[1] = cpu_get_host_ticks();
88 static target_ulong h_eoi(PowerPCCPU *cpu, sPAPRMachineState *spapr,
89 target_ulong opcode, target_ulong *args)
91 CPUState *cs = CPU(cpu);
92 target_ulong xirr = args[0];
94 icp_eoi(spapr->xics, cs->cpu_index, xirr);
98 static target_ulong h_ipoll(PowerPCCPU *cpu, sPAPRMachineState *spapr,
99 target_ulong opcode, target_ulong *args)
101 CPUState *cs = CPU(cpu);
103 uint32_t xirr = icp_ipoll(spapr->xics->ss + cs->cpu_index, &mfrr);
111 static void rtas_set_xive(PowerPCCPU *cpu, sPAPRMachineState *spapr,
113 uint32_t nargs, target_ulong args,
114 uint32_t nret, target_ulong rets)
116 ICSState *ics = QLIST_FIRST(&spapr->xics->ics);
117 uint32_t nr, server, priority;
119 if ((nargs != 3) || (nret != 1)) {
120 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
124 rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
128 nr = rtas_ld(args, 0);
129 server = xics_get_cpu_index_by_dt_id(rtas_ld(args, 1));
130 priority = rtas_ld(args, 2);
132 if (!ics_valid_irq(ics, nr) || (server >= ics->xics->nr_servers)
133 || (priority > 0xff)) {
134 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
138 ics_write_xive(ics, nr, server, priority, priority);
140 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
143 static void rtas_get_xive(PowerPCCPU *cpu, sPAPRMachineState *spapr,
145 uint32_t nargs, target_ulong args,
146 uint32_t nret, target_ulong rets)
148 ICSState *ics = QLIST_FIRST(&spapr->xics->ics);
151 if ((nargs != 1) || (nret != 3)) {
152 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
156 rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
160 nr = rtas_ld(args, 0);
162 if (!ics_valid_irq(ics, nr)) {
163 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
167 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
168 rtas_st(rets, 1, ics->irqs[nr - ics->offset].server);
169 rtas_st(rets, 2, ics->irqs[nr - ics->offset].priority);
172 static void rtas_int_off(PowerPCCPU *cpu, sPAPRMachineState *spapr,
174 uint32_t nargs, target_ulong args,
175 uint32_t nret, target_ulong rets)
177 ICSState *ics = QLIST_FIRST(&spapr->xics->ics);
180 if ((nargs != 1) || (nret != 1)) {
181 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
185 rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
189 nr = rtas_ld(args, 0);
191 if (!ics_valid_irq(ics, nr)) {
192 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
196 ics_write_xive(ics, nr, ics->irqs[nr - ics->offset].server, 0xff,
197 ics->irqs[nr - ics->offset].priority);
199 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
202 static void rtas_int_on(PowerPCCPU *cpu, sPAPRMachineState *spapr,
204 uint32_t nargs, target_ulong args,
205 uint32_t nret, target_ulong rets)
207 ICSState *ics = QLIST_FIRST(&spapr->xics->ics);
210 if ((nargs != 1) || (nret != 1)) {
211 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
215 rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
219 nr = rtas_ld(args, 0);
221 if (!ics_valid_irq(ics, nr)) {
222 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
226 ics_write_xive(ics, nr, ics->irqs[nr - ics->offset].server,
227 ics->irqs[nr - ics->offset].saved_priority,
228 ics->irqs[nr - ics->offset].saved_priority);
230 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
233 static void xics_spapr_set_nr_irqs(XICSState *xics, uint32_t nr_irqs,
236 ICSState *ics = QLIST_FIRST(&xics->ics);
238 /* This needs to be deprecated ... */
239 xics->nr_irqs = nr_irqs;
241 ics->nr_irqs = nr_irqs;
245 static void xics_spapr_set_nr_servers(XICSState *xics, uint32_t nr_servers,
250 xics->nr_servers = nr_servers;
252 xics->ss = g_malloc0(xics->nr_servers * sizeof(ICPState));
253 for (i = 0; i < xics->nr_servers; i++) {
255 object_initialize(&xics->ss[i], sizeof(xics->ss[i]), TYPE_ICP);
256 snprintf(buffer, sizeof(buffer), "icp[%d]", i);
257 object_property_add_child(OBJECT(xics), buffer, OBJECT(&xics->ss[i]),
262 static void xics_spapr_realize(DeviceState *dev, Error **errp)
264 XICSState *xics = XICS_SPAPR(dev);
269 if (!xics->nr_servers) {
270 error_setg(errp, "Number of servers needs to be greater 0");
274 /* Registration of global state belongs into realize */
275 spapr_rtas_register(RTAS_IBM_SET_XIVE, "ibm,set-xive", rtas_set_xive);
276 spapr_rtas_register(RTAS_IBM_GET_XIVE, "ibm,get-xive", rtas_get_xive);
277 spapr_rtas_register(RTAS_IBM_INT_OFF, "ibm,int-off", rtas_int_off);
278 spapr_rtas_register(RTAS_IBM_INT_ON, "ibm,int-on", rtas_int_on);
280 spapr_register_hypercall(H_CPPR, h_cppr);
281 spapr_register_hypercall(H_IPI, h_ipi);
282 spapr_register_hypercall(H_XIRR, h_xirr);
283 spapr_register_hypercall(H_XIRR_X, h_xirr_x);
284 spapr_register_hypercall(H_EOI, h_eoi);
285 spapr_register_hypercall(H_IPOLL, h_ipoll);
287 QLIST_FOREACH(ics, &xics->ics, list) {
288 object_property_set_bool(OBJECT(ics), true, "realized", &error);
290 error_propagate(errp, error);
295 for (i = 0; i < xics->nr_servers; i++) {
296 object_property_set_bool(OBJECT(&xics->ss[i]), true, "realized",
299 error_propagate(errp, error);
305 static void xics_spapr_initfn(Object *obj)
307 XICSState *xics = XICS_SPAPR(obj);
310 ics = ICS(object_new(TYPE_ICS));
311 object_property_add_child(obj, "ics", OBJECT(ics), NULL);
313 QLIST_INSERT_HEAD(&xics->ics, ics, list);
316 static void xics_spapr_class_init(ObjectClass *oc, void *data)
318 DeviceClass *dc = DEVICE_CLASS(oc);
319 XICSStateClass *xsc = XICS_SPAPR_CLASS(oc);
321 dc->realize = xics_spapr_realize;
322 xsc->set_nr_irqs = xics_spapr_set_nr_irqs;
323 xsc->set_nr_servers = xics_spapr_set_nr_servers;
326 static const TypeInfo xics_spapr_info = {
327 .name = TYPE_XICS_SPAPR,
328 .parent = TYPE_XICS_COMMON,
329 .instance_size = sizeof(XICSState),
330 .class_size = sizeof(XICSStateClass),
331 .class_init = xics_spapr_class_init,
332 .instance_init = xics_spapr_initfn,
335 #define ICS_IRQ_FREE(ics, srcno) \
336 (!((ics)->irqs[(srcno)].flags & (XICS_FLAGS_IRQ_MASK)))
338 static int ics_find_free_block(ICSState *ics, int num, int alignnum)
342 for (first = 0; first < ics->nr_irqs; first += alignnum) {
343 if (num > (ics->nr_irqs - first)) {
346 for (i = first; i < first + num; ++i) {
347 if (!ICS_IRQ_FREE(ics, i)) {
351 if (i == (first + num)) {
359 int xics_spapr_alloc(XICSState *xics, int irq_hint, bool lsi, Error **errp)
361 ICSState *ics = QLIST_FIRST(&xics->ics);
368 if (!ICS_IRQ_FREE(ics, irq_hint - ics->offset)) {
369 error_setg(errp, "can't allocate IRQ %d: already in use", irq_hint);
374 irq = ics_find_free_block(ics, 1, 1);
376 error_setg(errp, "can't allocate IRQ: no IRQ left");
382 ics_set_irq_type(ics, irq - ics->offset, lsi);
383 trace_xics_alloc(irq);
389 * Allocate block of consecutive IRQs, and return the number of the first IRQ in
390 * the block. If align==true, aligns the first IRQ number to num.
392 int xics_spapr_alloc_block(XICSState *xics, int num, bool lsi, bool align,
395 ICSState *ics = QLIST_FIRST(&xics->ics);
403 * MSIMesage::data is used for storing VIRQ so
404 * it has to be aligned to num to support multiple
405 * MSI vectors. MSI-X is not affected by this.
406 * The hint is used for the first IRQ, the rest should
407 * be allocated continuously.
410 assert((num == 1) || (num == 2) || (num == 4) ||
411 (num == 8) || (num == 16) || (num == 32));
412 first = ics_find_free_block(ics, num, num);
414 first = ics_find_free_block(ics, num, 1);
417 error_setg(errp, "can't find a free %d-IRQ block", num);
422 for (i = first; i < first + num; ++i) {
423 ics_set_irq_type(ics, i, lsi);
426 first += ics->offset;
428 trace_xics_alloc_block(first, num, lsi, align);
433 static void ics_free(ICSState *ics, int srcno, int num)
437 for (i = srcno; i < srcno + num; ++i) {
438 if (ICS_IRQ_FREE(ics, i)) {
439 trace_xics_ics_free_warn(0, i + ics->offset);
441 memset(&ics->irqs[i], 0, sizeof(ICSIRQState));
445 void xics_spapr_free(XICSState *xics, int irq, int num)
447 ICSState *ics = xics_find_source(xics, irq);
450 trace_xics_ics_free(0, irq, num);
451 ics_free(ics, irq - ics->offset, num);
455 static void xics_spapr_register_types(void)
457 type_register_static(&xics_spapr_info);
460 type_init(xics_spapr_register_types)