These changes are the raw update to qemu-2.6.
[kvmfornfv.git] / qemu / hw / mips / cps.c
1 /*
2  * Coherent Processing System emulation.
3  *
4  * Copyright (c) 2016 Imagination Technologies
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but 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.
15  *
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/>.
18  */
19
20 #include "qemu/osdep.h"
21 #include "qapi/error.h"
22 #include "hw/mips/cps.h"
23 #include "hw/mips/mips.h"
24 #include "hw/mips/cpudevs.h"
25 #include "sysemu/kvm.h"
26
27 qemu_irq get_cps_irq(MIPSCPSState *s, int pin_number)
28 {
29     MIPSCPU *cpu = MIPS_CPU(first_cpu);
30     CPUMIPSState *env = &cpu->env;
31
32     assert(pin_number < s->num_irq);
33
34     /* TODO: return GIC pins once implemented */
35     return env->irq[pin_number];
36 }
37
38 static void mips_cps_init(Object *obj)
39 {
40     SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
41     MIPSCPSState *s = MIPS_CPS(obj);
42
43     /* Cover entire address space as there do not seem to be any
44      * constraints for the base address of CPC and GIC. */
45     memory_region_init(&s->container, obj, "mips-cps-container", UINT64_MAX);
46     sysbus_init_mmio(sbd, &s->container);
47 }
48
49 static void main_cpu_reset(void *opaque)
50 {
51     MIPSCPU *cpu = opaque;
52     CPUState *cs = CPU(cpu);
53
54     cpu_reset(cs);
55
56     /* All VPs are halted on reset. Leave powering up to CPC. */
57     cs->halted = 1;
58 }
59
60 static bool cpu_mips_itu_supported(CPUMIPSState *env)
61 {
62     bool is_mt = (env->CP0_Config5 & (1 << CP0C5_VP)) ||
63                  (env->CP0_Config3 & (1 << CP0C3_MT));
64
65     return is_mt && !kvm_enabled();
66 }
67
68 static void mips_cps_realize(DeviceState *dev, Error **errp)
69 {
70     MIPSCPSState *s = MIPS_CPS(dev);
71     CPUMIPSState *env;
72     MIPSCPU *cpu;
73     int i;
74     Error *err = NULL;
75     target_ulong gcr_base;
76     bool itu_present = false;
77
78     for (i = 0; i < s->num_vp; i++) {
79         cpu = cpu_mips_init(s->cpu_model);
80         if (cpu == NULL) {
81             error_setg(errp, "%s: CPU initialization failed\n",  __func__);
82             return;
83         }
84         env = &cpu->env;
85
86         /* Init internal devices */
87         cpu_mips_irq_init_cpu(env);
88         cpu_mips_clock_init(env);
89         if (cpu_mips_itu_supported(env)) {
90             itu_present = true;
91             /* Attach ITC Tag to the VP */
92             env->itc_tag = mips_itu_get_tag_region(&s->itu);
93         }
94         qemu_register_reset(main_cpu_reset, cpu);
95     }
96
97     cpu = MIPS_CPU(first_cpu);
98     env = &cpu->env;
99
100     /* Inter-Thread Communication Unit */
101     if (itu_present) {
102         object_initialize(&s->itu, sizeof(s->itu), TYPE_MIPS_ITU);
103         qdev_set_parent_bus(DEVICE(&s->itu), sysbus_get_default());
104
105         object_property_set_int(OBJECT(&s->itu), 16, "num-fifo", &err);
106         object_property_set_int(OBJECT(&s->itu), 16, "num-semaphores", &err);
107         object_property_set_bool(OBJECT(&s->itu), true, "realized", &err);
108         if (err != NULL) {
109             error_propagate(errp, err);
110             return;
111         }
112
113         memory_region_add_subregion(&s->container, 0,
114                            sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->itu), 0));
115     }
116
117     /* Cluster Power Controller */
118     object_initialize(&s->cpc, sizeof(s->cpc), TYPE_MIPS_CPC);
119     qdev_set_parent_bus(DEVICE(&s->cpc), sysbus_get_default());
120
121     object_property_set_int(OBJECT(&s->cpc), s->num_vp, "num-vp", &err);
122     object_property_set_int(OBJECT(&s->cpc), 1, "vp-start-running", &err);
123     object_property_set_bool(OBJECT(&s->cpc), true, "realized", &err);
124     if (err != NULL) {
125         error_propagate(errp, err);
126         return;
127     }
128
129     memory_region_add_subregion(&s->container, 0,
130                             sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->cpc), 0));
131
132     /* Global Configuration Registers */
133     gcr_base = env->CP0_CMGCRBase << 4;
134
135     object_initialize(&s->gcr, sizeof(s->gcr), TYPE_MIPS_GCR);
136     qdev_set_parent_bus(DEVICE(&s->gcr), sysbus_get_default());
137
138     object_property_set_int(OBJECT(&s->gcr), s->num_vp, "num-vp", &err);
139     object_property_set_int(OBJECT(&s->gcr), 0x800, "gcr-rev", &err);
140     object_property_set_int(OBJECT(&s->gcr), gcr_base, "gcr-base", &err);
141     object_property_set_link(OBJECT(&s->gcr), OBJECT(&s->cpc.mr), "cpc", &err);
142     object_property_set_bool(OBJECT(&s->gcr), true, "realized", &err);
143     if (err != NULL) {
144         error_propagate(errp, err);
145         return;
146     }
147
148     memory_region_add_subregion(&s->container, gcr_base,
149                             sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->gcr), 0));
150 }
151
152 static Property mips_cps_properties[] = {
153     DEFINE_PROP_UINT32("num-vp", MIPSCPSState, num_vp, 1),
154     DEFINE_PROP_UINT32("num-irq", MIPSCPSState, num_irq, 8),
155     DEFINE_PROP_STRING("cpu-model", MIPSCPSState, cpu_model),
156     DEFINE_PROP_END_OF_LIST()
157 };
158
159 static void mips_cps_class_init(ObjectClass *klass, void *data)
160 {
161     DeviceClass *dc = DEVICE_CLASS(klass);
162
163     dc->realize = mips_cps_realize;
164     dc->props = mips_cps_properties;
165 }
166
167 static const TypeInfo mips_cps_info = {
168     .name = TYPE_MIPS_CPS,
169     .parent = TYPE_SYS_BUS_DEVICE,
170     .instance_size = sizeof(MIPSCPSState),
171     .instance_init = mips_cps_init,
172     .class_init = mips_cps_class_init,
173 };
174
175 static void mips_cps_register_types(void)
176 {
177     type_register_static(&mips_cps_info);
178 }
179
180 type_init(mips_cps_register_types)