hw/arm/bcm2836.c

   1 /*
   2  * Raspberry Pi emulation (c) 2012 Gregory Estrade
   3  * Upstreaming code cleanup [including bcm2835_*] (c) 2013 Jan Petrous
   4  *
   5  * Rasperry Pi 2 emulation and refactoring Copyright (c) 2015, Microsoft
   6  * Written by Andrew Baumann
   7  *
   8  * This code is licensed under the GNU GPLv2 and later.
   9  */
  10
  11 #include "qemu/osdep.h"
  12 #include "qapi/error.h"
  13 #include "qemu/module.h"
  14 #include "cpu.h"
  15 #include "hw/arm/bcm2836.h"
  16 #include "hw/arm/raspi_platform.h"
  17 #include "hw/sysbus.h"
  18
  19 struct BCM283XInfo {
  20     const char *name;
  21     const char *cpu_type;
  22     hwaddr peri_base; /* Peripheral base address seen by the CPU */
  23     hwaddr ctrl_base; /* Interrupt controller and mailboxes etc. */
  24     int clusterid;
  25 };
  26
  27 static const BCM283XInfo bcm283x_socs[] = {
  28     {
  29         .name = TYPE_BCM2836,
  30         .cpu_type = ARM_CPU_TYPE_NAME("cortex-a7"),
  31         .peri_base = 0x3f000000,
  32         .ctrl_base = 0x40000000,
  33         .clusterid = 0xf,
  34     },
  35 #ifdef TARGET_AARCH64
  36     {
  37         .name = TYPE_BCM2837,
  38         .cpu_type = ARM_CPU_TYPE_NAME("cortex-a53"),
  39         .peri_base = 0x3f000000,
  40         .ctrl_base = 0x40000000,
  41         .clusterid = 0x0,
  42     },
  43 #endif
  44 };
  45
  46 static void bcm2836_init(Object *obj)
  47 {
  48     BCM283XState *s = BCM283X(obj);
  49     BCM283XClass *bc = BCM283X_GET_CLASS(obj);
  50     const BCM283XInfo *info = bc->info;
  51     int n;
  52
  53     for (n = 0; n < BCM283X_NCPUS; n++) {
  54         object_initialize_child(obj, "cpu[*]", &s->cpu[n].core,
  55                                 sizeof(s->cpu[n].core), info->cpu_type,
  56                                 &error_abort, NULL);
  57     }
  58
  59     sysbus_init_child_obj(obj, "control", &s->control, sizeof(s->control),
  60                           TYPE_BCM2836_CONTROL);
  61
  62     sysbus_init_child_obj(obj, "peripherals", &s->peripherals,
  63                           sizeof(s->peripherals), TYPE_BCM2835_PERIPHERALS);
  64     object_property_add_alias(obj, "board-rev", OBJECT(&s->peripherals),
  65                               "board-rev", &error_abort);
  66     object_property_add_alias(obj, "vcram-size", OBJECT(&s->peripherals),
  67                               "vcram-size", &error_abort);
  68 }
  69
  70 static void bcm2836_realize(DeviceState *dev, Error **errp)
  71 {
  72     BCM283XState *s = BCM283X(dev);
  73     BCM283XClass *bc = BCM283X_GET_CLASS(dev);
  74     const BCM283XInfo *info = bc->info;
  75     Object *obj;
  76     Error *err = NULL;
  77     int n;
  78
  79     /* common peripherals from bcm2835 */
  80
  81     obj = object_property_get_link(OBJECT(dev), "ram", &err);
  82     if (obj == NULL) {
  83         error_setg(errp, "%s: required ram link not found: %s",
  84                    __func__, error_get_pretty(err));
  85         return;
  86     }
  87
  88     object_property_add_const_link(OBJECT(&s->peripherals), "ram", obj, &err);
  89     if (err) {
  90         error_propagate(errp, err);
  91         return;
  92     }
  93
  94     object_property_set_bool(OBJECT(&s->peripherals), true, "realized", &err);
  95     if (err) {
  96         error_propagate(errp, err);
  97         return;
  98     }
  99
 100     object_property_add_alias(OBJECT(s), "sd-bus", OBJECT(&s->peripherals),
 101                               "sd-bus", &err);
 102     if (err) {
 103         error_propagate(errp, err);
 104         return;
 105     }
 106
 107     sysbus_mmio_map_overlap(SYS_BUS_DEVICE(&s->peripherals), 0,
 108                             info->peri_base, 1);
 109
 110     /* bcm2836 interrupt controller (and mailboxes, etc.) */
 111     object_property_set_bool(OBJECT(&s->control), true, "realized", &err);
 112     if (err) {
 113         error_propagate(errp, err);
 114         return;
 115     }
 116
 117     sysbus_mmio_map(SYS_BUS_DEVICE(&s->control), 0, info->ctrl_base);
 118
 119     sysbus_connect_irq(SYS_BUS_DEVICE(&s->peripherals), 0,
 120         qdev_get_gpio_in_named(DEVICE(&s->control), "gpu-irq", 0));
 121     sysbus_connect_irq(SYS_BUS_DEVICE(&s->peripherals), 1,
 122         qdev_get_gpio_in_named(DEVICE(&s->control), "gpu-fiq", 0));
 123
 124     for (n = 0; n < BCM283X_NCPUS; n++) {
 125         /* TODO: this should be converted to a property of ARM_CPU */
 126         s->cpu[n].core.mp_affinity = (info->clusterid << 8) | n;
 127
 128         /* set periphbase/CBAR value for CPU-local registers */
 129         object_property_set_int(OBJECT(&s->cpu[n].core),
 130                                 info->peri_base,
 131                                 "reset-cbar", &err);
 132         if (err) {
 133             error_propagate(errp, err);
 134             return;
 135         }
 136
 137         /* start powered off if not enabled */
 138         object_property_set_bool(OBJECT(&s->cpu[n].core), n >= s->enabled_cpus,
 139                                  "start-powered-off", &err);
 140         if (err) {
 141             error_propagate(errp, err);
 142             return;
 143         }
 144
 145         object_property_set_bool(OBJECT(&s->cpu[n].core), true,
 146                                  "realized", &err);
 147         if (err) {
 148             error_propagate(errp, err);
 149             return;
 150         }
 151
 152         /* Connect irq/fiq outputs from the interrupt controller. */
 153         qdev_connect_gpio_out_named(DEVICE(&s->control), "irq", n,
 154                 qdev_get_gpio_in(DEVICE(&s->cpu[n].core), ARM_CPU_IRQ));
 155         qdev_connect_gpio_out_named(DEVICE(&s->control), "fiq", n,
 156                 qdev_get_gpio_in(DEVICE(&s->cpu[n].core), ARM_CPU_FIQ));
 157
 158         /* Connect timers from the CPU to the interrupt controller */
 159         qdev_connect_gpio_out(DEVICE(&s->cpu[n].core), GTIMER_PHYS,
 160                 qdev_get_gpio_in_named(DEVICE(&s->control), "cntpnsirq", n));
 161         qdev_connect_gpio_out(DEVICE(&s->cpu[n].core), GTIMER_VIRT,
 162                 qdev_get_gpio_in_named(DEVICE(&s->control), "cntvirq", n));
 163         qdev_connect_gpio_out(DEVICE(&s->cpu[n].core), GTIMER_HYP,
 164                 qdev_get_gpio_in_named(DEVICE(&s->control), "cnthpirq", n));
 165         qdev_connect_gpio_out(DEVICE(&s->cpu[n].core), GTIMER_SEC,
 166                 qdev_get_gpio_in_named(DEVICE(&s->control), "cntpsirq", n));
 167     }
 168 }
 169
 170 static Property bcm2836_props[] = {
 171     DEFINE_PROP_UINT32("enabled-cpus", BCM283XState, enabled_cpus,
 172                        BCM283X_NCPUS),
 173     DEFINE_PROP_END_OF_LIST()
 174 };
 175
 176 static void bcm283x_class_init(ObjectClass *oc, void *data)
 177 {
 178     DeviceClass *dc = DEVICE_CLASS(oc);
 179     BCM283XClass *bc = BCM283X_CLASS(oc);
 180
 181     bc->info = data;
 182     dc->realize = bcm2836_realize;
 183     dc->props = bcm2836_props;
 184     /* Reason: Must be wired up in code (see raspi_init() function) */
 185     dc->user_creatable = false;
 186 }
 187
 188 static const TypeInfo bcm283x_type_info = {
 189     .name = TYPE_BCM283X,
 190     .parent = TYPE_DEVICE,
 191     .instance_size = sizeof(BCM283XState),
 192     .instance_init = bcm2836_init,
 193     .class_size = sizeof(BCM283XClass),
 194     .abstract = true,
 195 };
 196
 197 static void bcm2836_register_types(void)
 198 {
 199     int i;
 200
 201     type_register_static(&bcm283x_type_info);
 202     for (i = 0; i < ARRAY_SIZE(bcm283x_socs); i++) {
 203         TypeInfo ti = {
 204             .name = bcm283x_socs[i].name,
 205             .parent = TYPE_BCM283X,
 206             .class_init = bcm283x_class_init,
 207             .class_data = (void *) &bcm283x_socs[i],
 208         };
 209         type_register(&ti);
 210     }
 211 }
 212
 213 type_init(bcm2836_register_types)