hw/cpu/arm11mpcore.c

   1 /*
   2  * ARM11MPCore internal peripheral emulation.
   3  *
   4  * Copyright (c) 2006-2007 CodeSourcery.
   5  * Written by Paul Brook
   6  *
   7  * This code is licensed under the GPL.
   8  */
   9
  10 #include "qemu/osdep.h"
  11 #include "qapi/error.h"
  12 #include "hw/cpu/arm11mpcore.h"
  13 #include "hw/intc/realview_gic.h"
  14
  15
  16 static void mpcore_priv_set_irq(void *opaque, int irq, int level)
  17 {
  18     ARM11MPCorePriveState *s = (ARM11MPCorePriveState *)opaque;
  19
  20     qemu_set_irq(qdev_get_gpio_in(DEVICE(&s->gic), irq), level);
  21 }
  22
  23 static void mpcore_priv_map_setup(ARM11MPCorePriveState *s)
  24 {
  25     int i;
  26     SysBusDevice *scubusdev = SYS_BUS_DEVICE(&s->scu);
  27     DeviceState *gicdev = DEVICE(&s->gic);
  28     SysBusDevice *gicbusdev = SYS_BUS_DEVICE(&s->gic);
  29     SysBusDevice *timerbusdev = SYS_BUS_DEVICE(&s->mptimer);
  30     SysBusDevice *wdtbusdev = SYS_BUS_DEVICE(&s->wdtimer);
  31
  32     memory_region_add_subregion(&s->container, 0,
  33                                 sysbus_mmio_get_region(scubusdev, 0));
  34     /* GIC CPU interfaces: "current CPU" at 0x100, then specific CPUs
  35      * at 0x200, 0x300...
  36      */
  37     for (i = 0; i < (s->num_cpu + 1); i++) {
  38         hwaddr offset = 0x100 + (i * 0x100);
  39         memory_region_add_subregion(&s->container, offset,
  40                                     sysbus_mmio_get_region(gicbusdev, i + 1));
  41     }
  42     /* Add the regions for timer and watchdog for "current CPU" and
  43      * for each specific CPU.
  44      */
  45     for (i = 0; i < (s->num_cpu + 1); i++) {
  46         /* Timers at 0x600, 0x700, ...; watchdogs at 0x620, 0x720, ... */
  47         hwaddr offset = 0x600 + i * 0x100;
  48         memory_region_add_subregion(&s->container, offset,
  49                                     sysbus_mmio_get_region(timerbusdev, i));
  50         memory_region_add_subregion(&s->container, offset + 0x20,
  51                                     sysbus_mmio_get_region(wdtbusdev, i));
  52     }
  53     memory_region_add_subregion(&s->container, 0x1000,
  54                                 sysbus_mmio_get_region(gicbusdev, 0));
  55     /* Wire up the interrupt from each watchdog and timer.
  56      * For each core the timer is PPI 29 and the watchdog PPI 30.
  57      */
  58     for (i = 0; i < s->num_cpu; i++) {
  59         int ppibase = (s->num_irq - 32) + i * 32;
  60         sysbus_connect_irq(timerbusdev, i,
  61                            qdev_get_gpio_in(gicdev, ppibase + 29));
  62         sysbus_connect_irq(wdtbusdev, i,
  63                            qdev_get_gpio_in(gicdev, ppibase + 30));
  64     }
  65 }
  66
  67 static void mpcore_priv_realize(DeviceState *dev, Error **errp)
  68 {
  69     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
  70     ARM11MPCorePriveState *s = ARM11MPCORE_PRIV(dev);
  71     DeviceState *scudev = DEVICE(&s->scu);
  72     DeviceState *gicdev = DEVICE(&s->gic);
  73     DeviceState *mptimerdev = DEVICE(&s->mptimer);
  74     DeviceState *wdtimerdev = DEVICE(&s->wdtimer);
  75     Error *err = NULL;
  76
  77     qdev_prop_set_uint32(scudev, "num-cpu", s->num_cpu);
  78     object_property_set_bool(OBJECT(&s->scu), true, "realized", &err);
  79     if (err != NULL) {
  80         error_propagate(errp, err);
  81         return;
  82     }
  83
  84     qdev_prop_set_uint32(gicdev, "num-cpu", s->num_cpu);
  85     qdev_prop_set_uint32(gicdev, "num-irq", s->num_irq);
  86     object_property_set_bool(OBJECT(&s->gic), true, "realized", &err);
  87     if (err != NULL) {
  88         error_propagate(errp, err);
  89         return;
  90     }
  91
  92     /* Pass through outbound IRQ lines from the GIC */
  93     sysbus_pass_irq(sbd, SYS_BUS_DEVICE(&s->gic));
  94
  95     /* Pass through inbound GPIO lines to the GIC */
  96     qdev_init_gpio_in(dev, mpcore_priv_set_irq, s->num_irq - 32);
  97
  98     qdev_prop_set_uint32(mptimerdev, "num-cpu", s->num_cpu);
  99     object_property_set_bool(OBJECT(&s->mptimer), true, "realized", &err);
 100     if (err != NULL) {
 101         error_propagate(errp, err);
 102         return;
 103     }
 104
 105     qdev_prop_set_uint32(wdtimerdev, "num-cpu", s->num_cpu);
 106     object_property_set_bool(OBJECT(&s->wdtimer), true, "realized", &err);
 107     if (err != NULL) {
 108         error_propagate(errp, err);
 109         return;
 110     }
 111
 112     mpcore_priv_map_setup(s);
 113 }
 114
 115 static void mpcore_priv_initfn(Object *obj)
 116 {
 117     SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
 118     ARM11MPCorePriveState *s = ARM11MPCORE_PRIV(obj);
 119
 120     memory_region_init(&s->container, OBJECT(s),
 121                        "mpcore-priv-container", 0x2000);
 122     sysbus_init_mmio(sbd, &s->container);
 123
 124     sysbus_init_child_obj(obj, "scu", &s->scu, sizeof(s->scu), TYPE_ARM11_SCU);
 125
 126     sysbus_init_child_obj(obj, "gic", &s->gic, sizeof(s->gic), TYPE_ARM_GIC);
 127     /* Request the legacy 11MPCore GIC behaviour: */
 128     qdev_prop_set_uint32(DEVICE(&s->gic), "revision", 0);
 129
 130     sysbus_init_child_obj(obj, "mptimer", &s->mptimer, sizeof(s->mptimer),
 131                           TYPE_ARM_MPTIMER);
 132
 133     sysbus_init_child_obj(obj, "wdtimer", &s->wdtimer, sizeof(s->wdtimer),
 134                           TYPE_ARM_MPTIMER);
 135 }
 136
 137 static Property mpcore_priv_properties[] = {
 138     DEFINE_PROP_UINT32("num-cpu", ARM11MPCorePriveState, num_cpu, 1),
 139     /* The ARM11 MPCORE TRM says the on-chip controller may have
 140      * anything from 0 to 224 external interrupt IRQ lines (with another
 141      * 32 internal). We default to 32+32, which is the number provided by
 142      * the ARM11 MPCore test chip in the Realview Versatile Express
 143      * coretile. Other boards may differ and should set this property
 144      * appropriately. Some Linux kernels may not boot if the hardware
 145      * has more IRQ lines than the kernel expects.
 146      */
 147     DEFINE_PROP_UINT32("num-irq", ARM11MPCorePriveState, num_irq, 64),
 148     DEFINE_PROP_END_OF_LIST(),
 149 };
 150
 151 static void mpcore_priv_class_init(ObjectClass *klass, void *data)
 152 {
 153     DeviceClass *dc = DEVICE_CLASS(klass);
 154
 155     dc->realize = mpcore_priv_realize;
 156     dc->props = mpcore_priv_properties;
 157 }
 158
 159 static const TypeInfo mpcore_priv_info = {
 160     .name          = TYPE_ARM11MPCORE_PRIV,
 161     .parent        = TYPE_SYS_BUS_DEVICE,
 162     .instance_size = sizeof(ARM11MPCorePriveState),
 163     .instance_init = mpcore_priv_initfn,
 164     .class_init    = mpcore_priv_class_init,
 165 };
 166
 167 static void arm11mpcore_register_types(void)
 168 {
 169     type_register_static(&mpcore_priv_info);
 170 }
 171
 172 type_init(arm11mpcore_register_types)