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 #define TYPE_A15MPCORE_PRIV "a15mpcore_priv"
  27 #define A15MPCORE_PRIV(obj) \
  28     OBJECT_CHECK(A15MPPrivState, (obj), TYPE_A15MPCORE_PRIV)
  29
  30 typedef struct A15MPPrivState {
  31     /*< private >*/
  32     SysBusDevice parent_obj;
  33     /*< public >*/
  34
  35     uint32_t num_cpu;
  36     uint32_t num_irq;
  37     MemoryRegion container;
  38     DeviceState *gic;
  39 } A15MPPrivState;
  40
  41 static void a15mp_priv_set_irq(void *opaque, int irq, int level)
  42 {
  43     A15MPPrivState *s = (A15MPPrivState *)opaque;
  44     qemu_set_irq(qdev_get_gpio_in(s->gic, irq), level);
  45 }
  46
  47 static void a15mp_priv_initfn(Object *obj)
  48 {
  49     SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
  50     A15MPPrivState *s = A15MPCORE_PRIV(obj);
  51
  52     memory_region_init(&s->container, obj, "a15mp-priv-container", 0x8000);
  53     sysbus_init_mmio(sbd, &s->container);
  54 }
  55
  56 static int a15mp_priv_init(SysBusDevice *dev)
  57 {
  58     A15MPPrivState *s = A15MPCORE_PRIV(dev);
  59     SysBusDevice *busdev;
  60     const char *gictype = "arm_gic";
  61     int i;
  62
  63     if (kvm_irqchip_in_kernel()) {
  64         gictype = "kvm-arm-gic";
  65     }
  66
  67     s->gic = qdev_create(NULL, gictype);
  68     qdev_prop_set_uint32(s->gic, "num-cpu", s->num_cpu);
  69     qdev_prop_set_uint32(s->gic, "num-irq", s->num_irq);
  70     qdev_prop_set_uint32(s->gic, "revision", 2);
  71     qdev_init_nofail(s->gic);
  72     busdev = SYS_BUS_DEVICE(s->gic);
  73
  74     /* Pass through outbound IRQ lines from the GIC */
  75     sysbus_pass_irq(dev, busdev);
  76
  77     /* Pass through inbound GPIO lines to the GIC */
  78     qdev_init_gpio_in(DEVICE(dev), a15mp_priv_set_irq, s->num_irq - 32);
  79
  80     /* Wire the outputs from each CPU's generic timer to the
  81      * appropriate GIC PPI inputs
  82      */
  83     for (i = 0; i < s->num_cpu; i++) {
  84         DeviceState *cpudev = DEVICE(qemu_get_cpu(i));
  85         int ppibase = s->num_irq - 32 + i * 32;
  86         /* physical timer; we wire it up to the non-secure timer's ID,
  87          * since a real A15 always has TrustZone but QEMU doesn't.
  88          */
  89         qdev_connect_gpio_out(cpudev, 0,
  90                               qdev_get_gpio_in(s->gic, ppibase + 30));
  91         /* virtual timer */
  92         qdev_connect_gpio_out(cpudev, 1,
  93                               qdev_get_gpio_in(s->gic, ppibase + 27));
  94     }
  95
  96     /* Memory map (addresses are offsets from PERIPHBASE):
  97      *  0x0000-0x0fff -- reserved
  98      *  0x1000-0x1fff -- GIC Distributor
  99      *  0x2000-0x2fff -- GIC CPU interface
 100      *  0x4000-0x4fff -- GIC virtual interface control (not modelled)
 101      *  0x5000-0x5fff -- GIC virtual interface control (not modelled)
 102      *  0x6000-0x7fff -- GIC virtual CPU interface (not modelled)
 103      */
 104     memory_region_add_subregion(&s->container, 0x1000,
 105                                 sysbus_mmio_get_region(busdev, 0));
 106     memory_region_add_subregion(&s->container, 0x2000,
 107                                 sysbus_mmio_get_region(busdev, 1));
 108
 109     return 0;
 110 }
 111
 112 static Property a15mp_priv_properties[] = {
 113     DEFINE_PROP_UINT32("num-cpu", A15MPPrivState, num_cpu, 1),
 114     /* The Cortex-A15MP may have anything from 0 to 224 external interrupt
 115      * IRQ lines (with another 32 internal). We default to 128+32, which
 116      * is the number provided by the Cortex-A15MP test chip in the
 117      * Versatile Express A15 development board.
 118      * Other boards may differ and should set this property appropriately.
 119      */
 120     DEFINE_PROP_UINT32("num-irq", A15MPPrivState, num_irq, 160),
 121     DEFINE_PROP_END_OF_LIST(),
 122 };
 123
 124 static void a15mp_priv_class_init(ObjectClass *klass, void *data)
 125 {
 126     DeviceClass *dc = DEVICE_CLASS(klass);
 127     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 128     k->init = a15mp_priv_init;
 129     dc->props = a15mp_priv_properties;
 130     /* We currently have no savable state */
 131 }
 132
 133 static const TypeInfo a15mp_priv_info = {
 134     .name  = TYPE_A15MPCORE_PRIV,
 135     .parent = TYPE_SYS_BUS_DEVICE,
 136     .instance_size  = sizeof(A15MPPrivState),
 137     .instance_init = a15mp_priv_initfn,
 138     .class_init = a15mp_priv_class_init,
 139 };
 140
 141 static void a15mp_register_types(void)
 142 {
 143     type_register_static(&a15mp_priv_info);
 144 }
 145
 146 type_init(a15mp_register_types)