2 * QEMU PowerPC PowerNV CPU Core model
4 * Copyright (c) 2016, IBM Corporation.
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public License
8 * as published by the Free Software Foundation; either version 2 of
9 * the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
19 #include "qemu/osdep.h"
20 #include "sysemu/sysemu.h"
21 #include "qapi/error.h"
23 #include "target-ppc/cpu.h"
24 #include "hw/ppc/ppc.h"
25 #include "hw/ppc/pnv.h"
26 #include "hw/ppc/pnv_core.h"
28 static void powernv_cpu_reset(void *opaque)
30 PowerPCCPU *cpu = opaque;
31 CPUState *cs = CPU(cpu);
32 CPUPPCState *env = &cpu->env;
37 * the skiboot firmware elects a primary thread to initialize the
38 * system and it can be any.
40 env->gpr[3] = PNV_FDT_ADDR;
42 env->msr |= MSR_HVB; /* Hypervisor mode */
45 static void powernv_cpu_init(PowerPCCPU *cpu, Error **errp)
47 CPUPPCState *env = &cpu->env;
49 int thread_index = 0; /* TODO: TCG supports only one thread */
50 ppc_spr_t *pir = &env->spr_cb[SPR_PIR];
52 core_pir = object_property_get_int(OBJECT(cpu), "core-pir", &error_abort);
55 * The PIR of a thread is the core PIR + the thread index. We will
56 * need to find a way to get the thread index when TCG supports
57 * more than 1. We could use the object name ?
59 pir->default_value = core_pir + thread_index;
61 /* Set time-base frequency to 512 MHz */
62 cpu_ppc_tb_init(env, PNV_TIMEBASE_FREQ);
64 qemu_register_reset(powernv_cpu_reset, cpu);
68 * These values are read by the PowerNV HW monitors under Linux
70 #define PNV_XSCOM_EX_DTS_RESULT0 0x50000
71 #define PNV_XSCOM_EX_DTS_RESULT1 0x50001
73 static uint64_t pnv_core_xscom_read(void *opaque, hwaddr addr,
76 uint32_t offset = addr >> 3;
79 /* The result should be 38 C */
81 case PNV_XSCOM_EX_DTS_RESULT0:
82 val = 0x26f024f023f0000ull;
84 case PNV_XSCOM_EX_DTS_RESULT1:
85 val = 0x24f000000000000ull;
88 qemu_log_mask(LOG_UNIMP, "Warning: reading reg=0x%" HWADDR_PRIx,
95 static void pnv_core_xscom_write(void *opaque, hwaddr addr, uint64_t val,
98 qemu_log_mask(LOG_UNIMP, "Warning: writing to reg=0x%" HWADDR_PRIx,
102 static const MemoryRegionOps pnv_core_xscom_ops = {
103 .read = pnv_core_xscom_read,
104 .write = pnv_core_xscom_write,
105 .valid.min_access_size = 8,
106 .valid.max_access_size = 8,
107 .impl.min_access_size = 8,
108 .impl.max_access_size = 8,
109 .endianness = DEVICE_BIG_ENDIAN,
112 static void pnv_core_realize_child(Object *child, Error **errp)
114 Error *local_err = NULL;
115 CPUState *cs = CPU(child);
116 PowerPCCPU *cpu = POWERPC_CPU(cs);
118 object_property_set_bool(child, true, "realized", &local_err);
120 error_propagate(errp, local_err);
124 powernv_cpu_init(cpu, &local_err);
126 error_propagate(errp, local_err);
131 static void pnv_core_realize(DeviceState *dev, Error **errp)
133 PnvCore *pc = PNV_CORE(OBJECT(dev));
134 CPUCore *cc = CPU_CORE(OBJECT(dev));
135 PnvCoreClass *pcc = PNV_CORE_GET_CLASS(OBJECT(dev));
136 const char *typename = object_class_get_name(pcc->cpu_oc);
137 size_t size = object_type_get_instance_size(typename);
138 Error *local_err = NULL;
143 pc->threads = g_malloc0(size * cc->nr_threads);
144 for (i = 0; i < cc->nr_threads; i++) {
145 obj = pc->threads + i * size;
147 object_initialize(obj, size, typename);
149 snprintf(name, sizeof(name), "thread[%d]", i);
150 object_property_add_child(OBJECT(pc), name, obj, &local_err);
151 object_property_add_alias(obj, "core-pir", OBJECT(pc),
159 for (j = 0; j < cc->nr_threads; j++) {
160 obj = pc->threads + j * size;
162 pnv_core_realize_child(obj, &local_err);
168 snprintf(name, sizeof(name), "xscom-core.%d", cc->core_id);
169 pnv_xscom_region_init(&pc->xscom_regs, OBJECT(dev), &pnv_core_xscom_ops,
170 pc, name, PNV_XSCOM_EX_CORE_SIZE);
175 obj = pc->threads + i * size;
176 object_unparent(obj);
179 error_propagate(errp, local_err);
182 static Property pnv_core_properties[] = {
183 DEFINE_PROP_UINT32("pir", PnvCore, pir, 0),
184 DEFINE_PROP_END_OF_LIST(),
187 static void pnv_core_class_init(ObjectClass *oc, void *data)
189 DeviceClass *dc = DEVICE_CLASS(oc);
190 PnvCoreClass *pcc = PNV_CORE_CLASS(oc);
192 dc->realize = pnv_core_realize;
193 dc->props = pnv_core_properties;
194 pcc->cpu_oc = cpu_class_by_name(TYPE_POWERPC_CPU, data);
197 static const TypeInfo pnv_core_info = {
198 .name = TYPE_PNV_CORE,
199 .parent = TYPE_CPU_CORE,
200 .instance_size = sizeof(PnvCore),
201 .class_size = sizeof(PnvCoreClass),
205 static const char *pnv_core_models[] = {
206 "POWER8E", "POWER8", "POWER8NVL", "POWER9"
209 static void pnv_core_register_types(void)
213 type_register_static(&pnv_core_info);
214 for (i = 0; i < ARRAY_SIZE(pnv_core_models); ++i) {
216 .parent = TYPE_PNV_CORE,
217 .instance_size = sizeof(PnvCore),
218 .class_init = pnv_core_class_init,
219 .class_data = (void *) pnv_core_models[i],
221 ti.name = pnv_core_typename(pnv_core_models[i]);
223 g_free((void *)ti.name);
227 type_init(pnv_core_register_types)
229 char *pnv_core_typename(const char *model)
231 return g_strdup_printf(TYPE_PNV_CORE "-%s", model);