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 "hw/sysbus.h"
  22 #include "sysemu/kvm.h"
  23
  24 /* A15MP private memory region.  */
  25
  26 typedef struct A15MPPrivState {
  27     SysBusDevice busdev;
  28     uint32_t num_cpu;
  29     uint32_t num_irq;
  30     MemoryRegion container;
  31     DeviceState *gic;
  32 } A15MPPrivState;
  33
  34 static void a15mp_priv_set_irq(void *opaque, int irq, int level)
  35 {
  36     A15MPPrivState *s = (A15MPPrivState *)opaque;
  37     qemu_set_irq(qdev_get_gpio_in(s->gic, irq), level);
  38 }
  39
  40 static int a15mp_priv_init(SysBusDevice *dev)
  41 {
  42     A15MPPrivState *s = FROM_SYSBUS(A15MPPrivState, dev);
  43     SysBusDevice *busdev;
  44     const char *gictype = "arm_gic";
  45
  46     if (kvm_irqchip_in_kernel()) {
  47         gictype = "kvm-arm-gic";
  48     }
  49
  50     s->gic = qdev_create(NULL, gictype);
  51     qdev_prop_set_uint32(s->gic, "num-cpu", s->num_cpu);
  52     qdev_prop_set_uint32(s->gic, "num-irq", s->num_irq);
  53     qdev_prop_set_uint32(s->gic, "revision", 2);
  54     qdev_init_nofail(s->gic);
  55     busdev = SYS_BUS_DEVICE(s->gic);
  56
  57     /* Pass through outbound IRQ lines from the GIC */
  58     sysbus_pass_irq(dev, busdev);
  59
  60     /* Pass through inbound GPIO lines to the GIC */
  61     qdev_init_gpio_in(&s->busdev.qdev, a15mp_priv_set_irq, s->num_irq - 32);
  62
  63     /* Memory map (addresses are offsets from PERIPHBASE):
  64      *  0x0000-0x0fff -- reserved
  65      *  0x1000-0x1fff -- GIC Distributor
  66      *  0x2000-0x2fff -- GIC CPU interface
  67      *  0x4000-0x4fff -- GIC virtual interface control (not modelled)
  68      *  0x5000-0x5fff -- GIC virtual interface control (not modelled)
  69      *  0x6000-0x7fff -- GIC virtual CPU interface (not modelled)
  70      */
  71     memory_region_init(&s->container, "a15mp-priv-container", 0x8000);
  72     memory_region_add_subregion(&s->container, 0x1000,
  73                                 sysbus_mmio_get_region(busdev, 0));
  74     memory_region_add_subregion(&s->container, 0x2000,
  75                                 sysbus_mmio_get_region(busdev, 1));
  76
  77     sysbus_init_mmio(dev, &s->container);
  78     return 0;
  79 }
  80
  81 static Property a15mp_priv_properties[] = {
  82     DEFINE_PROP_UINT32("num-cpu", A15MPPrivState, num_cpu, 1),
  83     /* The Cortex-A15MP may have anything from 0 to 224 external interrupt
  84      * IRQ lines (with another 32 internal). We default to 64+32, which
  85      * is the number provided by the Cortex-A15MP test chip in the
  86      * Versatile Express A15 development board.
  87      * Other boards may differ and should set this property appropriately.
  88      */
  89     DEFINE_PROP_UINT32("num-irq", A15MPPrivState, num_irq, 96),
  90     DEFINE_PROP_END_OF_LIST(),
  91 };
  92
  93 static void a15mp_priv_class_init(ObjectClass *klass, void *data)
  94 {
  95     DeviceClass *dc = DEVICE_CLASS(klass);
  96     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
  97     k->init = a15mp_priv_init;
  98     dc->props = a15mp_priv_properties;
  99     /* We currently have no savable state */
 100 }
 101
 102 static const TypeInfo a15mp_priv_info = {
 103     .name  = "a15mpcore_priv",
 104     .parent = TYPE_SYS_BUS_DEVICE,
 105     .instance_size  = sizeof(A15MPPrivState),
 106     .class_init = a15mp_priv_class_init,
 107 };
 108
 109 static void a15mp_register_types(void)
 110 {
 111     type_register_static(&a15mp_priv_info);
 112 }
 113
 114 type_init(a15mp_register_types)