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
  19 #define TYPE_REALVIEW_MPCORE_RIRQ "realview_mpcore"
  20 #define REALVIEW_MPCORE_RIRQ(obj) \
  21     OBJECT_CHECK(mpcore_rirq_state, (obj), TYPE_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 typedef struct {
  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 } mpcore_rirq_state;
  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     Error *err = NULL;
  69     int n;
  70     int i;
  71
  72     qdev_prop_set_uint32(priv, "num-cpu", s->num_cpu);
  73     sysbus_realize(SYS_BUS_DEVICE(&s->priv), &err);
  74     if (err != NULL) {
  75         error_propagate(errp, err);
  76         return;
  77     }
  78     sysbus_pass_irq(sbd, SYS_BUS_DEVICE(&s->priv));
  79     for (i = 0; i < 32; i++) {
  80         s->cpuic[i] = qdev_get_gpio_in(priv, i);
  81     }
  82     /* ??? IRQ routing is hardcoded to "normal" mode.  */
  83     for (n = 0; n < 4; n++) {
  84         sysbus_realize(SYS_BUS_DEVICE(&s->gic[n]), &err);
  85         if (err != NULL) {
  86             error_propagate(errp, err);
  87             return;
  88         }
  89         gic = DEVICE(&s->gic[n]);
  90         gicbusdev = SYS_BUS_DEVICE(&s->gic[n]);
  91         sysbus_mmio_map(gicbusdev, 0, 0x10040000 + n * 0x10000);
  92         sysbus_connect_irq(gicbusdev, 0, s->cpuic[10 + n]);
  93         for (i = 0; i < 64; i++) {
  94             s->rvic[n][i] = qdev_get_gpio_in(gic, i);
  95         }
  96     }
  97     qdev_init_gpio_in(dev, mpcore_rirq_set_irq, 64);
  98 }
  99
 100 static void mpcore_rirq_init(Object *obj)
 101 {
 102     SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
 103     mpcore_rirq_state *s = REALVIEW_MPCORE_RIRQ(obj);
 104     SysBusDevice *privbusdev;
 105     int i;
 106
 107     object_initialize_child(obj, "a11priv", &s->priv, TYPE_ARM11MPCORE_PRIV);
 108     privbusdev = SYS_BUS_DEVICE(&s->priv);
 109     sysbus_init_mmio(sbd, sysbus_mmio_get_region(privbusdev, 0));
 110
 111     for (i = 0; i < 4; i++) {
 112         object_initialize_child(obj, "gic[*]", &s->gic[i], TYPE_REALVIEW_GIC);
 113     }
 114 }
 115
 116 static Property mpcore_rirq_properties[] = {
 117     DEFINE_PROP_UINT32("num-cpu", mpcore_rirq_state, num_cpu, 1),
 118     DEFINE_PROP_END_OF_LIST(),
 119 };
 120
 121 static void mpcore_rirq_class_init(ObjectClass *klass, void *data)
 122 {
 123     DeviceClass *dc = DEVICE_CLASS(klass);
 124
 125     dc->realize = realview_mpcore_realize;
 126     device_class_set_props(dc, mpcore_rirq_properties);
 127 }
 128
 129 static const TypeInfo mpcore_rirq_info = {
 130     .name          = TYPE_REALVIEW_MPCORE_RIRQ,
 131     .parent        = TYPE_SYS_BUS_DEVICE,
 132     .instance_size = sizeof(mpcore_rirq_state),
 133     .instance_init = mpcore_rirq_init,
 134     .class_init    = mpcore_rirq_class_init,
 135 };
 136
 137 static void realview_mpcore_register_types(void)
 138 {
 139     type_register_static(&mpcore_rirq_info);
 140 }
 141
 142 type_init(realview_mpcore_register_types)