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 /* Peripheral base address seen by the CPU */
  20 #define BCM2836_PERI_BASE       0x3F000000
  21
  22 /* "QA7" (Pi2) interrupt controller and mailboxes etc. */
  23 #define BCM2836_CONTROL_BASE    0x40000000
  24
  25 struct BCM283XInfo {
  26     const char *name;
  27     const char *cpu_type;
  28     int clusterid;
  29 };
  30
  31 static const BCM283XInfo bcm283x_socs[] = {
  32     {
  33         .name = TYPE_BCM2836,
  34         .cpu_type = ARM_CPU_TYPE_NAME("cortex-a7"),
  35         .clusterid = 0xf,
  36     },
  37 #ifdef TARGET_AARCH64
  38     {
  39         .name = TYPE_BCM2837,
  40         .cpu_type = ARM_CPU_TYPE_NAME("cortex-a53"),
  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->cpus[n], sizeof(s->cpus[n]),
  55                                 info->cpu_type, &error_abort, NULL);
  56     }
  57
  58     sysbus_init_child_obj(obj, "control", &s->control, sizeof(s->control),
  59                           TYPE_BCM2836_CONTROL);
  60
  61     sysbus_init_child_obj(obj, "peripherals", &s->peripherals,
  62                           sizeof(s->peripherals), TYPE_BCM2835_PERIPHERALS);
  63     object_property_add_alias(obj, "board-rev", OBJECT(&s->peripherals),
  64                               "board-rev", &error_abort);
  65     object_property_add_alias(obj, "vcram-size", OBJECT(&s->peripherals),
  66                               "vcram-size", &error_abort);
  67 }
  68
  69 static void bcm2836_realize(DeviceState *dev, Error **errp)
  70 {
  71     BCM283XState *s = BCM283X(dev);
  72     BCM283XClass *bc = BCM283X_GET_CLASS(dev);
  73     const BCM283XInfo *info = bc->info;
  74     Object *obj;
  75     Error *err = NULL;
  76     int n;
  77
  78     /* common peripherals from bcm2835 */
  79
  80     obj = object_property_get_link(OBJECT(dev), "ram", &err);
  81     if (obj == NULL) {
  82         error_setg(errp, "%s: required ram link not found: %s",
  83                    __func__, error_get_pretty(err));
  84         return;
  85     }
  86
  87     object_property_add_const_link(OBJECT(&s->peripherals), "ram", obj, &err);
  88     if (err) {
  89         error_propagate(errp, err);
  90         return;
  91     }
  92
  93     object_property_set_bool(OBJECT(&s->peripherals), true, "realized", &err);
  94     if (err) {
  95         error_propagate(errp, err);
  96         return;
  97     }
  98
  99     object_property_add_alias(OBJECT(s), "sd-bus", OBJECT(&s->peripherals),
 100                               "sd-bus", &err);
 101     if (err) {
 102         error_propagate(errp, err);
 103         return;
 104     }
 105
 106     sysbus_mmio_map_overlap(SYS_BUS_DEVICE(&s->peripherals), 0,
 107                             BCM2836_PERI_BASE, 1);
 108
 109     /* bcm2836 interrupt controller (and mailboxes, etc.) */
 110     object_property_set_bool(OBJECT(&s->control), true, "realized", &err);
 111     if (err) {
 112         error_propagate(errp, err);
 113         return;
 114     }
 115
 116     sysbus_mmio_map(SYS_BUS_DEVICE(&s->control), 0, BCM2836_CONTROL_BASE);
 117
 118     sysbus_connect_irq(SYS_BUS_DEVICE(&s->peripherals), 0,
 119         qdev_get_gpio_in_named(DEVICE(&s->control), "gpu-irq", 0));
 120     sysbus_connect_irq(SYS_BUS_DEVICE(&s->peripherals), 1,
 121         qdev_get_gpio_in_named(DEVICE(&s->control), "gpu-fiq", 0));
 122
 123     for (n = 0; n < BCM283X_NCPUS; n++) {
 124         /* TODO: this should be converted to a property of ARM_CPU */
 125         s->cpus[n].mp_affinity = (info->clusterid << 8) | n;
 126
 127         /* set periphbase/CBAR value for CPU-local registers */
 128         object_property_set_int(OBJECT(&s->cpus[n]),
 129                                 BCM2836_PERI_BASE + MCORE_OFFSET,
 130                                 "reset-cbar", &err);
 131         if (err) {
 132             error_propagate(errp, err);
 133             return;
 134         }
 135
 136         /* start powered off if not enabled */
 137         object_property_set_bool(OBJECT(&s->cpus[n]), n >= s->enabled_cpus,
 138                                  "start-powered-off", &err);
 139         if (err) {
 140             error_propagate(errp, err);
 141             return;
 142         }
 143
 144         object_property_set_bool(OBJECT(&s->cpus[n]), true, "realized", &err);
 145         if (err) {
 146             error_propagate(errp, err);
 147             return;
 148         }
 149
 150         /* Connect irq/fiq outputs from the interrupt controller. */
 151         qdev_connect_gpio_out_named(DEVICE(&s->control), "irq", n,
 152                 qdev_get_gpio_in(DEVICE(&s->cpus[n]), ARM_CPU_IRQ));
 153         qdev_connect_gpio_out_named(DEVICE(&s->control), "fiq", n,
 154                 qdev_get_gpio_in(DEVICE(&s->cpus[n]), ARM_CPU_FIQ));
 155
 156         /* Connect timers from the CPU to the interrupt controller */
 157         qdev_connect_gpio_out(DEVICE(&s->cpus[n]), GTIMER_PHYS,
 158                 qdev_get_gpio_in_named(DEVICE(&s->control), "cntpnsirq", n));
 159         qdev_connect_gpio_out(DEVICE(&s->cpus[n]), GTIMER_VIRT,
 160                 qdev_get_gpio_in_named(DEVICE(&s->control), "cntvirq", n));
 161         qdev_connect_gpio_out(DEVICE(&s->cpus[n]), GTIMER_HYP,
 162                 qdev_get_gpio_in_named(DEVICE(&s->control), "cnthpirq", n));
 163         qdev_connect_gpio_out(DEVICE(&s->cpus[n]), GTIMER_SEC,
 164                 qdev_get_gpio_in_named(DEVICE(&s->control), "cntpsirq", n));
 165     }
 166 }
 167
 168 static Property bcm2836_props[] = {
 169     DEFINE_PROP_UINT32("enabled-cpus", BCM283XState, enabled_cpus,
 170                        BCM283X_NCPUS),
 171     DEFINE_PROP_END_OF_LIST()
 172 };
 173
 174 static void bcm283x_class_init(ObjectClass *oc, void *data)
 175 {
 176     DeviceClass *dc = DEVICE_CLASS(oc);
 177     BCM283XClass *bc = BCM283X_CLASS(oc);
 178
 179     bc->info = data;
 180     dc->realize = bcm2836_realize;
 181     dc->props = bcm2836_props;
 182     /* Reason: Must be wired up in code (see raspi_init() function) */
 183     dc->user_creatable = false;
 184 }
 185
 186 static const TypeInfo bcm283x_type_info = {
 187     .name = TYPE_BCM283X,
 188     .parent = TYPE_DEVICE,
 189     .instance_size = sizeof(BCM283XState),
 190     .instance_init = bcm2836_init,
 191     .class_size = sizeof(BCM283XClass),
 192     .abstract = true,
 193 };
 194
 195 static void bcm2836_register_types(void)
 196 {
 197     int i;
 198
 199     type_register_static(&bcm283x_type_info);
 200     for (i = 0; i < ARRAY_SIZE(bcm283x_socs); i++) {
 201         TypeInfo ti = {
 202             .name = bcm283x_socs[i].name,
 203             .parent = TYPE_BCM283X,
 204             .class_init = bcm283x_class_init,
 205             .class_data = (void *) &bcm283x_socs[i],
 206         };
 207         type_register(&ti);
 208     }
 209 }
 210
 211 type_init(bcm2836_register_types)