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 "hw/arm/bcm2836.h"
  13 #include "hw/arm/raspi_platform.h"
  14 #include "hw/sysbus.h"
  15 #include "exec/address-spaces.h"
  16
  17 /* Peripheral base address seen by the CPU */
  18 #define BCM2836_PERI_BASE       0x3F000000
  19
  20 /* "QA7" (Pi2) interrupt controller and mailboxes etc. */
  21 #define BCM2836_CONTROL_BASE    0x40000000
  22
  23 static void bcm2836_init(Object *obj)
  24 {
  25     BCM2836State *s = BCM2836(obj);
  26     int n;
  27
  28     for (n = 0; n < BCM2836_NCPUS; n++) {
  29         object_initialize(&s->cpus[n], sizeof(s->cpus[n]),
  30                           "cortex-a15-" TYPE_ARM_CPU);
  31         object_property_add_child(obj, "cpu[*]", OBJECT(&s->cpus[n]),
  32                                   &error_abort);
  33     }
  34
  35     object_initialize(&s->control, sizeof(s->control), TYPE_BCM2836_CONTROL);
  36     object_property_add_child(obj, "control", OBJECT(&s->control), NULL);
  37     qdev_set_parent_bus(DEVICE(&s->control), sysbus_get_default());
  38
  39     object_initialize(&s->peripherals, sizeof(s->peripherals),
  40                       TYPE_BCM2835_PERIPHERALS);
  41     object_property_add_child(obj, "peripherals", OBJECT(&s->peripherals),
  42                               &error_abort);
  43     object_property_add_alias(obj, "board-rev", OBJECT(&s->peripherals),
  44                               "board-rev", &error_abort);
  45     qdev_set_parent_bus(DEVICE(&s->peripherals), sysbus_get_default());
  46 }
  47
  48 static void bcm2836_realize(DeviceState *dev, Error **errp)
  49 {
  50     BCM2836State *s = BCM2836(dev);
  51     Object *obj;
  52     Error *err = NULL;
  53     int n;
  54
  55     /* common peripherals from bcm2835 */
  56
  57     obj = object_property_get_link(OBJECT(dev), "ram", &err);
  58     if (obj == NULL) {
  59         error_setg(errp, "%s: required ram link not found: %s",
  60                    __func__, error_get_pretty(err));
  61         return;
  62     }
  63
  64     object_property_add_const_link(OBJECT(&s->peripherals), "ram", obj, &err);
  65     if (err) {
  66         error_propagate(errp, err);
  67         return;
  68     }
  69
  70     object_property_set_bool(OBJECT(&s->peripherals), true, "realized", &err);
  71     if (err) {
  72         error_propagate(errp, err);
  73         return;
  74     }
  75
  76     sysbus_mmio_map_overlap(SYS_BUS_DEVICE(&s->peripherals), 0,
  77                             BCM2836_PERI_BASE, 1);
  78
  79     /* bcm2836 interrupt controller (and mailboxes, etc.) */
  80     object_property_set_bool(OBJECT(&s->control), true, "realized", &err);
  81     if (err) {
  82         error_propagate(errp, err);
  83         return;
  84     }
  85
  86     sysbus_mmio_map(SYS_BUS_DEVICE(&s->control), 0, BCM2836_CONTROL_BASE);
  87
  88     sysbus_connect_irq(SYS_BUS_DEVICE(&s->peripherals), 0,
  89         qdev_get_gpio_in_named(DEVICE(&s->control), "gpu-irq", 0));
  90     sysbus_connect_irq(SYS_BUS_DEVICE(&s->peripherals), 1,
  91         qdev_get_gpio_in_named(DEVICE(&s->control), "gpu-fiq", 0));
  92
  93     for (n = 0; n < BCM2836_NCPUS; n++) {
  94         /* Mirror bcm2836, which has clusterid set to 0xf
  95          * TODO: this should be converted to a property of ARM_CPU
  96          */
  97         s->cpus[n].mp_affinity = 0xF00 | n;
  98
  99         /* set periphbase/CBAR value for CPU-local registers */
 100         object_property_set_int(OBJECT(&s->cpus[n]),
 101                                 BCM2836_PERI_BASE + MCORE_OFFSET,
 102                                 "reset-cbar", &err);
 103         if (err) {
 104             error_propagate(errp, err);
 105             return;
 106         }
 107
 108         /* start powered off if not enabled */
 109         object_property_set_bool(OBJECT(&s->cpus[n]), n >= s->enabled_cpus,
 110                                  "start-powered-off", &err);
 111         if (err) {
 112             error_propagate(errp, err);
 113             return;
 114         }
 115
 116         object_property_set_bool(OBJECT(&s->cpus[n]), true, "realized", &err);
 117         if (err) {
 118             error_propagate(errp, err);
 119             return;
 120         }
 121
 122         /* Connect irq/fiq outputs from the interrupt controller. */
 123         qdev_connect_gpio_out_named(DEVICE(&s->control), "irq", n,
 124                 qdev_get_gpio_in(DEVICE(&s->cpus[n]), ARM_CPU_IRQ));
 125         qdev_connect_gpio_out_named(DEVICE(&s->control), "fiq", n,
 126                 qdev_get_gpio_in(DEVICE(&s->cpus[n]), ARM_CPU_FIQ));
 127
 128         /* Connect timers from the CPU to the interrupt controller */
 129         qdev_connect_gpio_out(DEVICE(&s->cpus[n]), GTIMER_PHYS,
 130                 qdev_get_gpio_in_named(DEVICE(&s->control), "cntpsirq", n));
 131         qdev_connect_gpio_out(DEVICE(&s->cpus[n]), GTIMER_VIRT,
 132                 qdev_get_gpio_in_named(DEVICE(&s->control), "cntvirq", n));
 133     }
 134 }
 135
 136 static Property bcm2836_props[] = {
 137     DEFINE_PROP_UINT32("enabled-cpus", BCM2836State, enabled_cpus, BCM2836_NCPUS),
 138     DEFINE_PROP_END_OF_LIST()
 139 };
 140
 141 static void bcm2836_class_init(ObjectClass *oc, void *data)
 142 {
 143     DeviceClass *dc = DEVICE_CLASS(oc);
 144
 145     dc->props = bcm2836_props;
 146     dc->realize = bcm2836_realize;
 147
 148     /*
 149      * Reason: creates an ARM CPU, thus use after free(), see
 150      * arm_cpu_class_init()
 151      */
 152     dc->cannot_destroy_with_object_finalize_yet = true;
 153 }
 154
 155 static const TypeInfo bcm2836_type_info = {
 156     .name = TYPE_BCM2836,
 157     .parent = TYPE_SYS_BUS_DEVICE,
 158     .instance_size = sizeof(BCM2836State),
 159     .instance_init = bcm2836_init,
 160     .class_init = bcm2836_class_init,
 161 };
 162
 163 static void bcm2836_register_types(void)
 164 {
 165     type_register_static(&bcm2836_type_info);
 166 }
 167
 168 type_init(bcm2836_register_types)