hw/arm/bcm2835.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 "cpu.h"
  13 #include "hw/arm/bcm2835.h"
  14 #include "hw/arm/raspi_platform.h"
  15 #include "hw/sysbus.h"
  16 #include "exec/address-spaces.h"
  17 #include "qapi/error.h"          /* error_abort */
  18
  19 /* Peripheral base address seen by the CPU */
  20 #define BCM2835_PERI_BASE       0x20000000
  21
  22 static void bcm2835_init(Object *obj)
  23 {
  24     BCM2835State *s = BCM2835(obj);
  25
  26     object_initialize(&s->cpu, sizeof(s->cpu), "arm1176-" TYPE_ARM_CPU);
  27     object_property_add_child(obj, "cpu", OBJECT(&s->cpu), &error_abort);
  28
  29     object_initialize(&s->peripherals, sizeof(s->peripherals),
  30                       TYPE_BCM2835_PERIPHERALS);
  31     object_property_add_child(obj, "peripherals", OBJECT(&s->peripherals),
  32                               &error_abort);
  33     object_property_add_alias(obj, "board-rev", OBJECT(&s->peripherals),
  34                               "board-rev", &error_abort);
  35     object_property_add_alias(obj, "vcram-size", OBJECT(&s->peripherals),
  36                               "vcram-size", &error_abort);
  37     qdev_set_parent_bus(DEVICE(&s->peripherals), sysbus_get_default());
  38 }
  39
  40 static void bcm2835_realize(DeviceState *dev, Error **errp)
  41 {
  42     BCM2835State *s = BCM2835(dev);
  43     Object *obj;
  44     Error *err = NULL;
  45
  46     /* common peripherals from bcm2835 */
  47     obj = object_property_get_link(OBJECT(dev), "ram", &err);
  48     if (obj == NULL) {
  49         error_setg(errp, "%s: required ram link not found: %s",
  50                    __func__, error_get_pretty(err));
  51         return;
  52     }
  53
  54     object_property_add_const_link(OBJECT(&s->peripherals), "ram", obj, &err);
  55     if (err) {
  56         error_propagate(errp, err);
  57         return;
  58     }
  59
  60     object_property_set_bool(OBJECT(&s->peripherals), true, "realized", &err);
  61     if (err) {
  62         error_propagate(errp, err);
  63         return;
  64     }
  65
  66     object_property_add_alias(OBJECT(s), "sd-bus", OBJECT(&s->peripherals),
  67                               "sd-bus", &err);
  68     if (err) {
  69         error_propagate(errp, err);
  70         return;
  71     }
  72
  73     sysbus_mmio_map_overlap(SYS_BUS_DEVICE(&s->peripherals), 0,
  74                             BCM2835_PERI_BASE, 1);
  75
  76     object_property_set_bool(OBJECT(&s->cpu), true, "realized", &err);
  77     if (err) {
  78         error_report_err(err);
  79         exit(1);
  80     }
  81
  82     sysbus_connect_irq(SYS_BUS_DEVICE(&s->peripherals), 0,
  83                        qdev_get_gpio_in(DEVICE(&s->cpu), ARM_CPU_IRQ));
  84     sysbus_connect_irq(SYS_BUS_DEVICE(&s->peripherals), 1,
  85                        qdev_get_gpio_in(DEVICE(&s->cpu), ARM_CPU_FIQ));
  86
  87 }
  88
  89 static void bcm2835_class_init(ObjectClass *oc, void *data)
  90 {
  91     DeviceClass *dc = DEVICE_CLASS(oc);
  92
  93     dc->realize = bcm2835_realize;
  94
  95     /*
  96      * Reason: creates an ARM CPU, thus use after free(), see
  97      * arm_cpu_class_init()
  98      */
  99     dc->cannot_destroy_with_object_finalize_yet = true;
 100 }
 101
 102 static const TypeInfo bcm2835_type_info = {
 103     .name = TYPE_BCM2835,
 104     .parent = TYPE_SYS_BUS_DEVICE,
 105     .instance_size = sizeof(BCM2835State),
 106     .instance_init = bcm2835_init,
 107     .class_init = bcm2835_class_init,
 108 };
 109
 110 static void bcm2835_register_types(void)
 111 {
 112     type_register_static(&bcm2835_type_info);
 113 }
 114
 115 type_init(bcm2835_register_types)