hw/cpu/realview_mpcore.c

   1 /*
   2  * RealView ARM11MPCore internal peripheral emulation
   3  *
   4  * Copyright (c) 2006-2007 CodeSourcery.
   5  * Copyright (c) 2013 SUSE LINUX Products GmbH
   6  * Written by Paul Brook and Andreas Färber
   7  *
   8  * This code is licensed under the GPL.
   9  */
  10
  11 #include "qemu/osdep.h"
  12 #include "qapi/error.h"
  13 #include "qemu/module.h"
  14 #include "hw/cpu/arm11mpcore.h"
  15 #include "hw/intc/realview_gic.h"
  16 #include "hw/irq.h"
  17 #include "hw/qdev-properties.h"
  18 #include "qom/object.h"
  19
  20 #define TYPE_REALVIEW_MPCORE_RIRQ "realview_mpcore"
  21 OBJECT_DECLARE_SIMPLE_TYPE(mpcore_rirq_state, REALVIEW_MPCORE_RIRQ)
  22
  23 /* Dummy PIC to route IRQ lines.  The baseboard has 4 independent IRQ
  24    controllers.  The output of these, plus some of the raw input lines
  25    are fed into a single SMP-aware interrupt controller on the CPU.  */
  26 struct mpcore_rirq_state {
  27     SysBusDevice parent_obj;
  28
  29     qemu_irq cpuic[32];
  30     qemu_irq rvic[4][64];
  31     uint32_t num_cpu;
  32
  33     ARM11MPCorePriveState priv;
  34     RealViewGICState gic[4];
  35 };
  36
  37 /* Map baseboard IRQs onto CPU IRQ lines.  */
  38 static const int mpcore_irq_map[32] = {
  39     -1, -1, -1, -1,  1,  2, -1, -1,
  40     -1, -1,  6, -1,  4,  5, -1, -1,
  41     -1, 14, 15,  0,  7,  8, -1, -1,
  42     -1, -1, -1, -1,  9,  3, -1, -1,
  43 };
  44
  45 static void mpcore_rirq_set_irq(void *opaque, int irq, int level)
  46 {
  47     mpcore_rirq_state *s = (mpcore_rirq_state *)opaque;
  48     int i;
  49
  50     for (i = 0; i < 4; i++) {
  51         qemu_set_irq(s->rvic[i][irq], level);
  52     }
  53     if (irq < 32) {
  54         irq = mpcore_irq_map[irq];
  55         if (irq >= 0) {
  56             qemu_set_irq(s->cpuic[irq], level);
  57         }
  58     }
  59 }
  60
  61 static void realview_mpcore_realize(DeviceState *dev, Error **errp)
  62 {
  63     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
  64     mpcore_rirq_state *s = REALVIEW_MPCORE_RIRQ(dev);
  65     DeviceState *priv = DEVICE(&s->priv);
  66     DeviceState *gic;
  67     SysBusDevice *gicbusdev;
  68     int n;
  69     int i;
  70
  71     qdev_prop_set_uint32(priv, "num-cpu", s->num_cpu);
  72     if (!sysbus_realize(SYS_BUS_DEVICE(&s->priv), errp)) {
  73         return;
  74     }
  75     sysbus_pass_irq(sbd, SYS_BUS_DEVICE(&s->priv));
  76     for (i = 0; i < 32; i++) {
  77         s->cpuic[i] = qdev_get_gpio_in(priv, i);
  78     }
  79     /* ??? IRQ routing is hardcoded to "normal" mode.  */
  80     for (n = 0; n < 4; n++) {
  81         if (!sysbus_realize(SYS_BUS_DEVICE(&s->gic[n]), errp)) {
  82             return;
  83         }
  84         gic = DEVICE(&s->gic[n]);
  85         gicbusdev = SYS_BUS_DEVICE(&s->gic[n]);
  86         sysbus_mmio_map(gicbusdev, 0, 0x10040000 + n * 0x10000);
  87         sysbus_connect_irq(gicbusdev, 0, s->cpuic[10 + n]);
  88         for (i = 0; i < 64; i++) {
  89             s->rvic[n][i] = qdev_get_gpio_in(gic, i);
  90         }
  91     }
  92     qdev_init_gpio_in(dev, mpcore_rirq_set_irq, 64);
  93 }
  94
  95 static void mpcore_rirq_init(Object *obj)
  96 {
  97     SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
  98     mpcore_rirq_state *s = REALVIEW_MPCORE_RIRQ(obj);
  99     SysBusDevice *privbusdev;
 100     int i;
 101
 102     object_initialize_child(obj, "a11priv", &s->priv, TYPE_ARM11MPCORE_PRIV);
 103     privbusdev = SYS_BUS_DEVICE(&s->priv);
 104     sysbus_init_mmio(sbd, sysbus_mmio_get_region(privbusdev, 0));
 105
 106     for (i = 0; i < 4; i++) {
 107         object_initialize_child(obj, "gic[*]", &s->gic[i], TYPE_REALVIEW_GIC);
 108     }
 109 }
 110
 111 static Property mpcore_rirq_properties[] = {
 112     DEFINE_PROP_UINT32("num-cpu", mpcore_rirq_state, num_cpu, 1),
 113     DEFINE_PROP_END_OF_LIST(),
 114 };
 115
 116 static void mpcore_rirq_class_init(ObjectClass *klass, void *data)
 117 {
 118     DeviceClass *dc = DEVICE_CLASS(klass);
 119
 120     dc->realize = realview_mpcore_realize;
 121     device_class_set_props(dc, mpcore_rirq_properties);
 122 }
 123
 124 static const TypeInfo mpcore_rirq_info = {
 125     .name          = TYPE_REALVIEW_MPCORE_RIRQ,
 126     .parent        = TYPE_SYS_BUS_DEVICE,
 127     .instance_size = sizeof(mpcore_rirq_state),
 128     .instance_init = mpcore_rirq_init,
 129     .class_init    = mpcore_rirq_class_init,
 130 };
 131
 132 static void realview_mpcore_register_types(void)
 133 {
 134     type_register_static(&mpcore_rirq_info);
 135 }
 136
 137 type_init(realview_mpcore_register_types)