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