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