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