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