LXR qemu/hw/cpu/a9mpcore.c

   1/*
   2 * Cortex-A9MPCore internal peripheral emulation.
   3 *
   4 * Copyright (c) 2009 CodeSourcery.
   5 * Copyright (c) 2011 Linaro Limited.
   6 * Written by Paul Brook, Peter Maydell.
   7 *
   8 * This code is licensed under the GPL.
   9 */
  10
  11#include "qemu/osdep.h"
  12#include "qapi/error.h"
  13#include "hw/cpu/a9mpcore.h"
  14#include "qom/cpu.h"
  15
  16static void a9mp_priv_set_irq(void *opaque, int irq, int level)
  17{
  18    A9MPPrivState *s = (A9MPPrivState *)opaque;
  19
  20    qemu_set_irq(qdev_get_gpio_in(DEVICE(&s->gic), irq), level);
  21}
  22
  23static void a9mp_priv_initfn(Object *obj)
  24{
  25    A9MPPrivState *s = A9MPCORE_PRIV(obj);
  26
  27    memory_region_init(&s->container, obj, "a9mp-priv-container", 0x2000);
  28    sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->container);
  29
  30    object_initialize(&s->scu, sizeof(s->scu), TYPE_A9_SCU);
  31    qdev_set_parent_bus(DEVICE(&s->scu), sysbus_get_default());
  32
  33    object_initialize(&s->gic, sizeof(s->gic), TYPE_ARM_GIC);
  34    qdev_set_parent_bus(DEVICE(&s->gic), sysbus_get_default());
  35
  36    object_initialize(&s->gtimer, sizeof(s->gtimer), TYPE_A9_GTIMER);
  37    qdev_set_parent_bus(DEVICE(&s->gtimer), sysbus_get_default());
  38
  39    object_initialize(&s->mptimer, sizeof(s->mptimer), TYPE_ARM_MPTIMER);
  40    qdev_set_parent_bus(DEVICE(&s->mptimer), sysbus_get_default());
  41
  42    object_initialize(&s->wdt, sizeof(s->wdt), TYPE_ARM_MPTIMER);
  43    qdev_set_parent_bus(DEVICE(&s->wdt), sysbus_get_default());
  44}
  45
  46static void a9mp_priv_realize(DeviceState *dev, Error **errp)
  47{
  48    SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
  49    A9MPPrivState *s = A9MPCORE_PRIV(dev);
  50    DeviceState *scudev, *gicdev, *gtimerdev, *mptimerdev, *wdtdev;
  51    SysBusDevice *scubusdev, *gicbusdev, *gtimerbusdev, *mptimerbusdev,
  52                 *wdtbusdev;
  53    Error *err = NULL;
  54    int i;
  55    bool has_el3;
  56    Object *cpuobj;
  57
  58    scudev = DEVICE(&s->scu);
  59    qdev_prop_set_uint32(scudev, "num-cpu", s->num_cpu);
  60    object_property_set_bool(OBJECT(&s->scu), true, "realized", &err);
  61    if (err != NULL) {
  62        error_propagate(errp, err);
  63        return;
  64    }
  65    scubusdev = SYS_BUS_DEVICE(&s->scu);
  66
  67    gicdev = DEVICE(&s->gic);
  68    qdev_prop_set_uint32(gicdev, "num-cpu", s->num_cpu);
  69    qdev_prop_set_uint32(gicdev, "num-irq", s->num_irq);
  70
  71    /* Make the GIC's TZ support match the CPUs. We assume that
  72     * either all the CPUs have TZ, or none do.
  73     */
  74    cpuobj = OBJECT(qemu_get_cpu(0));
  75    has_el3 = object_property_find(cpuobj, "has_el3", NULL) &&
  76        object_property_get_bool(cpuobj, "has_el3", &error_abort);
  77    qdev_prop_set_bit(gicdev, "has-security-extensions", has_el3);
  78
  79    object_property_set_bool(OBJECT(&s->gic), true, "realized", &err);
  80    if (err != NULL) {
  81        error_propagate(errp, err);
  82        return;
  83    }
  84    gicbusdev = SYS_BUS_DEVICE(&s->gic);
  85
  86    /* Pass through outbound IRQ lines from the GIC */
  87    sysbus_pass_irq(sbd, gicbusdev);
  88
  89    /* Pass through inbound GPIO lines to the GIC */
  90    qdev_init_gpio_in(dev, a9mp_priv_set_irq, s->num_irq - 32);
  91
  92    gtimerdev = DEVICE(&s->gtimer);
  93    qdev_prop_set_uint32(gtimerdev, "num-cpu", s->num_cpu);
  94    object_property_set_bool(OBJECT(&s->gtimer), true, "realized", &err);
  95    if (err != NULL) {
  96        error_propagate(errp, err);
  97        return;
  98    }
  99    gtimerbusdev = SYS_BUS_DEVICE(&s->gtimer);
 100
 101    mptimerdev = DEVICE(&s->mptimer);
 102    qdev_prop_set_uint32(mptimerdev, "num-cpu", s->num_cpu);
 103    object_property_set_bool(OBJECT(&s->mptimer), true, "realized", &err);
 104    if (err != NULL) {
 105        error_propagate(errp, err);
 106        return;
 107    }
 108    mptimerbusdev = SYS_BUS_DEVICE(&s->mptimer);
 109
 110    wdtdev = DEVICE(&s->wdt);
 111    qdev_prop_set_uint32(wdtdev, "num-cpu", s->num_cpu);
 112    object_property_set_bool(OBJECT(&s->wdt), true, "realized", &err);
 113    if (err != NULL) {
 114        error_propagate(errp, err);
 115        return;
 116    }
 117    wdtbusdev = SYS_BUS_DEVICE(&s->wdt);
 118
 119    /* Memory map (addresses are offsets from PERIPHBASE):
 120     *  0x0000-0x00ff -- Snoop Control Unit
 121     *  0x0100-0x01ff -- GIC CPU interface
 122     *  0x0200-0x02ff -- Global Timer
 123     *  0x0300-0x05ff -- nothing
 124     *  0x0600-0x06ff -- private timers and watchdogs
 125     *  0x0700-0x0fff -- nothing
 126     *  0x1000-0x1fff -- GIC Distributor
 127     */
 128    memory_region_add_subregion(&s->container, 0,
 129                                sysbus_mmio_get_region(scubusdev, 0));
 130    /* GIC CPU interface */
 131    memory_region_add_subregion(&s->container, 0x100,
 132                                sysbus_mmio_get_region(gicbusdev, 1));
 133    memory_region_add_subregion(&s->container, 0x200,
 134                                sysbus_mmio_get_region(gtimerbusdev, 0));
 135    /* Note that the A9 exposes only the "timer/watchdog for this core"
 136     * memory region, not the "timer/watchdog for core X" ones 11MPcore has.
 137     */
 138    memory_region_add_subregion(&s->container, 0x600,
 139                                sysbus_mmio_get_region(mptimerbusdev, 0));
 140    memory_region_add_subregion(&s->container, 0x620,
 141                                sysbus_mmio_get_region(wdtbusdev, 0));
 142    memory_region_add_subregion(&s->container, 0x1000,
 143                                sysbus_mmio_get_region(gicbusdev, 0));
 144
 145    /* Wire up the interrupt from each watchdog and timer.
 146     * For each core the global timer is PPI 27, the private
 147     * timer is PPI 29 and the watchdog PPI 30.
 148     */
 149    for (i = 0; i < s->num_cpu; i++) {
 150        int ppibase = (s->num_irq - 32) + i * 32;
 151        sysbus_connect_irq(gtimerbusdev, i,
 152                           qdev_get_gpio_in(gicdev, ppibase + 27));
 153        sysbus_connect_irq(mptimerbusdev, i,
 154                           qdev_get_gpio_in(gicdev, ppibase + 29));
 155        sysbus_connect_irq(wdtbusdev, i,
 156                           qdev_get_gpio_in(gicdev, ppibase + 30));
 157    }
 158}
 159
 160static Property a9mp_priv_properties[] = {
 161    DEFINE_PROP_UINT32("num-cpu", A9MPPrivState, num_cpu, 1),
 162    /* The Cortex-A9MP may have anything from 0 to 224 external interrupt
 163     * IRQ lines (with another 32 internal). We default to 64+32, which
 164     * is the number provided by the Cortex-A9MP test chip in the
 165     * Realview PBX-A9 and Versatile Express A9 development boards.
 166     * Other boards may differ and should set this property appropriately.
 167     */
 168    DEFINE_PROP_UINT32("num-irq", A9MPPrivState, num_irq, 96),
 169    DEFINE_PROP_END_OF_LIST(),
 170};
 171
 172static void a9mp_priv_class_init(ObjectClass *klass, void *data)
 173{
 174    DeviceClass *dc = DEVICE_CLASS(klass);
 175
 176    dc->realize = a9mp_priv_realize;
 177    dc->props = a9mp_priv_properties;
 178}
 179
 180static const TypeInfo a9mp_priv_info = {
 181    .name          = TYPE_A9MPCORE_PRIV,
 182    .parent        = TYPE_SYS_BUS_DEVICE,
 183    .instance_size = sizeof(A9MPPrivState),
 184    .instance_init = a9mp_priv_initfn,
 185    .class_init    = a9mp_priv_class_init,
 186};
 187
 188static void a9mp_register_types(void)
 189{
 190    type_register_static(&a9mp_priv_info);
 191}
 192
 193type_init(a9mp_register_types)
 194