hw/cpu/a15mpcore.c

   1 /*
   2  * Cortex-A15MPCore internal peripheral emulation.
   3  *
   4  * Copyright (c) 2012 Linaro Limited.
   5  * Written by Peter Maydell.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include "qemu/osdep.h"
  22 #include "qapi/error.h"
  23 #include "hw/cpu/a15mpcore.h"
  24 #include "sysemu/kvm.h"
  25 #include "kvm_arm.h"
  26
  27 static void a15mp_priv_set_irq(void *opaque, int irq, int level)
  28 {
  29     A15MPPrivState *s = (A15MPPrivState *)opaque;
  30
  31     qemu_set_irq(qdev_get_gpio_in(DEVICE(&s->gic), irq), level);
  32 }
  33
  34 static void a15mp_priv_initfn(Object *obj)
  35 {
  36     SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
  37     A15MPPrivState *s = A15MPCORE_PRIV(obj);
  38
  39     memory_region_init(&s->container, obj, "a15mp-priv-container", 0x8000);
  40     sysbus_init_mmio(sbd, &s->container);
  41
  42     sysbus_init_child_obj(obj, "gic", &s->gic, sizeof(s->gic),
  43                           gic_class_name());
  44     qdev_prop_set_uint32(DEVICE(&s->gic), "revision", 2);
  45 }
  46
  47 static void a15mp_priv_realize(DeviceState *dev, Error **errp)
  48 {
  49     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
  50     A15MPPrivState *s = A15MPCORE_PRIV(dev);
  51     DeviceState *gicdev;
  52     SysBusDevice *busdev;
  53     int i;
  54     Error *err = NULL;
  55     bool has_el3;
  56     bool has_el2 = false;
  57     Object *cpuobj;
  58
  59     gicdev = DEVICE(&s->gic);
  60     qdev_prop_set_uint32(gicdev, "num-cpu", s->num_cpu);
  61     qdev_prop_set_uint32(gicdev, "num-irq", s->num_irq);
  62
  63     if (!kvm_irqchip_in_kernel()) {
  64         /* Make the GIC's TZ support match the CPUs. We assume that
  65          * either all the CPUs have TZ, or none do.
  66          */
  67         cpuobj = OBJECT(qemu_get_cpu(0));
  68         has_el3 = object_property_find(cpuobj, "has_el3", NULL) &&
  69             object_property_get_bool(cpuobj, "has_el3", &error_abort);
  70         qdev_prop_set_bit(gicdev, "has-security-extensions", has_el3);
  71         /* Similarly for virtualization support */
  72         has_el2 = object_property_find(cpuobj, "has_el2", NULL) &&
  73             object_property_get_bool(cpuobj, "has_el2", &error_abort);
  74         qdev_prop_set_bit(gicdev, "has-virtualization-extensions", has_el2);
  75     }
  76
  77     object_property_set_bool(OBJECT(&s->gic), true, "realized", &err);
  78     if (err != NULL) {
  79         error_propagate(errp, err);
  80         return;
  81     }
  82     busdev = SYS_BUS_DEVICE(&s->gic);
  83
  84     /* Pass through outbound IRQ lines from the GIC */
  85     sysbus_pass_irq(sbd, busdev);
  86
  87     /* Pass through inbound GPIO lines to the GIC */
  88     qdev_init_gpio_in(dev, a15mp_priv_set_irq, s->num_irq - 32);
  89
  90     /* Wire the outputs from each CPU's generic timer to the
  91      * appropriate GIC PPI inputs
  92      */
  93     for (i = 0; i < s->num_cpu; i++) {
  94         DeviceState *cpudev = DEVICE(qemu_get_cpu(i));
  95         int ppibase = s->num_irq - 32 + i * 32;
  96         int irq;
  97         /* Mapping from the output timer irq lines from the CPU to the
  98          * GIC PPI inputs used on the A15:
  99          */
 100         const int timer_irq[] = {
 101             [GTIMER_PHYS] = 30,
 102             [GTIMER_VIRT] = 27,
 103             [GTIMER_HYP]  = 26,
 104             [GTIMER_SEC]  = 29,
 105         };
 106         for (irq = 0; irq < ARRAY_SIZE(timer_irq); irq++) {
 107             qdev_connect_gpio_out(cpudev, irq,
 108                                   qdev_get_gpio_in(gicdev,
 109                                                    ppibase + timer_irq[irq]));
 110         }
 111         if (has_el2) {
 112             /* Connect the GIC maintenance interrupt to PPI ID 25 */
 113             sysbus_connect_irq(SYS_BUS_DEVICE(gicdev), i + 4 * s->num_cpu,
 114                                qdev_get_gpio_in(gicdev, ppibase + 25));
 115         }
 116     }
 117
 118     /* Memory map (addresses are offsets from PERIPHBASE):
 119      *  0x0000-0x0fff -- reserved
 120      *  0x1000-0x1fff -- GIC Distributor
 121      *  0x2000-0x3fff -- GIC CPU interface
 122      *  0x4000-0x4fff -- GIC virtual interface control for this CPU
 123      *  0x5000-0x51ff -- GIC virtual interface control for CPU 0
 124      *  0x5200-0x53ff -- GIC virtual interface control for CPU 1
 125      *  0x5400-0x55ff -- GIC virtual interface control for CPU 2
 126      *  0x5600-0x57ff -- GIC virtual interface control for CPU 3
 127      *  0x6000-0x7fff -- GIC virtual CPU interface
 128      */
 129     memory_region_add_subregion(&s->container, 0x1000,
 130                                 sysbus_mmio_get_region(busdev, 0));
 131     memory_region_add_subregion(&s->container, 0x2000,
 132                                 sysbus_mmio_get_region(busdev, 1));
 133     if (has_el2) {
 134         memory_region_add_subregion(&s->container, 0x4000,
 135                                     sysbus_mmio_get_region(busdev, 2));
 136         memory_region_add_subregion(&s->container, 0x6000,
 137                                     sysbus_mmio_get_region(busdev, 3));
 138         for (i = 0; i < s->num_cpu; i++) {
 139             hwaddr base = 0x5000 + i * 0x200;
 140             MemoryRegion *mr = sysbus_mmio_get_region(busdev,
 141                                                       4 + s->num_cpu + i);
 142             memory_region_add_subregion(&s->container, base, mr);
 143         }
 144     }
 145 }
 146
 147 static Property a15mp_priv_properties[] = {
 148     DEFINE_PROP_UINT32("num-cpu", A15MPPrivState, num_cpu, 1),
 149     /* The Cortex-A15MP may have anything from 0 to 224 external interrupt
 150      * IRQ lines (with another 32 internal). We default to 128+32, which
 151      * is the number provided by the Cortex-A15MP test chip in the
 152      * Versatile Express A15 development board.
 153      * Other boards may differ and should set this property appropriately.
 154      */
 155     DEFINE_PROP_UINT32("num-irq", A15MPPrivState, num_irq, 160),
 156     DEFINE_PROP_END_OF_LIST(),
 157 };
 158
 159 static void a15mp_priv_class_init(ObjectClass *klass, void *data)
 160 {
 161     DeviceClass *dc = DEVICE_CLASS(klass);
 162
 163     dc->realize = a15mp_priv_realize;
 164     dc->props = a15mp_priv_properties;
 165     /* We currently have no savable state */
 166 }
 167
 168 static const TypeInfo a15mp_priv_info = {
 169     .name  = TYPE_A15MPCORE_PRIV,
 170     .parent = TYPE_SYS_BUS_DEVICE,
 171     .instance_size  = sizeof(A15MPPrivState),
 172     .instance_init = a15mp_priv_initfn,
 173     .class_init = a15mp_priv_class_init,
 174 };
 175
 176 static void a15mp_register_types(void)
 177 {
 178     type_register_static(&a15mp_priv_info);
 179 }
 180
 181 type_init(a15mp_register_types)