hw/arm11mpcore.c

   1 /*
   2  * ARM11MPCore internal peripheral emulation.
   3  *
   4  * Copyright (c) 2006-2007 CodeSourcery.
   5  * Written by Paul Brook
   6  *
   7  * This code is licensed under the GPL.
   8  */
   9
  10 #include "sysbus.h"
  11 #include "qemu/timer.h"
  12
  13 /* MPCore private memory region.  */
  14
  15 typedef struct mpcore_priv_state {
  16     SysBusDevice busdev;
  17     uint32_t scu_control;
  18     int iomemtype;
  19     uint32_t old_timer_status[8];
  20     uint32_t num_cpu;
  21     MemoryRegion iomem;
  22     MemoryRegion container;
  23     DeviceState *mptimer;
  24     DeviceState *gic;
  25     uint32_t num_irq;
  26 } mpcore_priv_state;
  27
  28 /* Per-CPU private memory mapped IO.  */
  29
  30 static uint64_t mpcore_scu_read(void *opaque, hwaddr offset,
  31                                 unsigned size)
  32 {
  33     mpcore_priv_state *s = (mpcore_priv_state *)opaque;
  34     int id;
  35     /* SCU */
  36     switch (offset) {
  37     case 0x00: /* Control.  */
  38         return s->scu_control;
  39     case 0x04: /* Configuration.  */
  40         id = ((1 << s->num_cpu) - 1) << 4;
  41         return id | (s->num_cpu - 1);
  42     case 0x08: /* CPU status.  */
  43         return 0;
  44     case 0x0c: /* Invalidate all.  */
  45         return 0;
  46     default:
  47         qemu_log_mask(LOG_GUEST_ERROR,
  48                       "mpcore_priv_read: Bad offset %x\n", (int)offset);
  49         return 0;
  50     }
  51 }
  52
  53 static void mpcore_scu_write(void *opaque, hwaddr offset,
  54                              uint64_t value, unsigned size)
  55 {
  56     mpcore_priv_state *s = (mpcore_priv_state *)opaque;
  57     /* SCU */
  58     switch (offset) {
  59     case 0: /* Control register.  */
  60         s->scu_control = value & 1;
  61         break;
  62     case 0x0c: /* Invalidate all.  */
  63         /* This is a no-op as cache is not emulated.  */
  64         break;
  65     default:
  66         qemu_log_mask(LOG_GUEST_ERROR,
  67                       "mpcore_priv_read: Bad offset %x\n", (int)offset);
  68     }
  69 }
  70
  71 static const MemoryRegionOps mpcore_scu_ops = {
  72     .read = mpcore_scu_read,
  73     .write = mpcore_scu_write,
  74     .endianness = DEVICE_NATIVE_ENDIAN,
  75 };
  76
  77 static void mpcore_priv_set_irq(void *opaque, int irq, int level)
  78 {
  79     mpcore_priv_state *s = (mpcore_priv_state *)opaque;
  80     qemu_set_irq(qdev_get_gpio_in(s->gic, irq), level);
  81 }
  82
  83 static void mpcore_priv_map_setup(mpcore_priv_state *s)
  84 {
  85     int i;
  86     SysBusDevice *gicbusdev = sysbus_from_qdev(s->gic);
  87     SysBusDevice *busdev = sysbus_from_qdev(s->mptimer);
  88     memory_region_init(&s->container, "mpcode-priv-container", 0x2000);
  89     memory_region_init_io(&s->iomem, &mpcore_scu_ops, s, "mpcore-scu", 0x100);
  90     memory_region_add_subregion(&s->container, 0, &s->iomem);
  91     /* GIC CPU interfaces: "current CPU" at 0x100, then specific CPUs
  92      * at 0x200, 0x300...
  93      */
  94     for (i = 0; i < (s->num_cpu + 1); i++) {
  95         hwaddr offset = 0x100 + (i * 0x100);
  96         memory_region_add_subregion(&s->container, offset,
  97                                     sysbus_mmio_get_region(gicbusdev, i + 1));
  98     }
  99     /* Add the regions for timer and watchdog for "current CPU" and
 100      * for each specific CPU.
 101      */
 102     for (i = 0; i < (s->num_cpu + 1) * 2; i++) {
 103         /* Timers at 0x600, 0x700, ...; watchdogs at 0x620, 0x720, ... */
 104         hwaddr offset = 0x600 + (i >> 1) * 0x100 + (i & 1) * 0x20;
 105         memory_region_add_subregion(&s->container, offset,
 106                                     sysbus_mmio_get_region(busdev, i));
 107     }
 108     memory_region_add_subregion(&s->container, 0x1000,
 109                                 sysbus_mmio_get_region(gicbusdev, 0));
 110     /* Wire up the interrupt from each watchdog and timer.
 111      * For each core the timer is PPI 29 and the watchdog PPI 30.
 112      */
 113     for (i = 0; i < s->num_cpu; i++) {
 114         int ppibase = (s->num_irq - 32) + i * 32;
 115         sysbus_connect_irq(busdev, i * 2,
 116                            qdev_get_gpio_in(s->gic, ppibase + 29));
 117         sysbus_connect_irq(busdev, i * 2 + 1,
 118                            qdev_get_gpio_in(s->gic, ppibase + 30));
 119     }
 120 }
 121
 122 static int mpcore_priv_init(SysBusDevice *dev)
 123 {
 124     mpcore_priv_state *s = FROM_SYSBUS(mpcore_priv_state, dev);
 125
 126     s->gic = qdev_create(NULL, "arm_gic");
 127     qdev_prop_set_uint32(s->gic, "num-cpu", s->num_cpu);
 128     qdev_prop_set_uint32(s->gic, "num-irq", s->num_irq);
 129     /* Request the legacy 11MPCore GIC behaviour: */
 130     qdev_prop_set_uint32(s->gic, "revision", 0);
 131     qdev_init_nofail(s->gic);
 132
 133     /* Pass through outbound IRQ lines from the GIC */
 134     sysbus_pass_irq(dev, sysbus_from_qdev(s->gic));
 135
 136     /* Pass through inbound GPIO lines to the GIC */
 137     qdev_init_gpio_in(&s->busdev.qdev, mpcore_priv_set_irq, s->num_irq - 32);
 138
 139     s->mptimer = qdev_create(NULL, "arm_mptimer");
 140     qdev_prop_set_uint32(s->mptimer, "num-cpu", s->num_cpu);
 141     qdev_init_nofail(s->mptimer);
 142     mpcore_priv_map_setup(s);
 143     sysbus_init_mmio(dev, &s->container);
 144     return 0;
 145 }
 146
 147 /* Dummy PIC to route IRQ lines.  The baseboard has 4 independent IRQ
 148    controllers.  The output of these, plus some of the raw input lines
 149    are fed into a single SMP-aware interrupt controller on the CPU.  */
 150 typedef struct {
 151     SysBusDevice busdev;
 152     SysBusDevice *priv;
 153     qemu_irq cpuic[32];
 154     qemu_irq rvic[4][64];
 155     uint32_t num_cpu;
 156 } mpcore_rirq_state;
 157
 158 /* Map baseboard IRQs onto CPU IRQ lines.  */
 159 static const int mpcore_irq_map[32] = {
 160     -1, -1, -1, -1,  1,  2, -1, -1,
 161     -1, -1,  6, -1,  4,  5, -1, -1,
 162     -1, 14, 15,  0,  7,  8, -1, -1,
 163     -1, -1, -1, -1,  9,  3, -1, -1,
 164 };
 165
 166 static void mpcore_rirq_set_irq(void *opaque, int irq, int level)
 167 {
 168     mpcore_rirq_state *s = (mpcore_rirq_state *)opaque;
 169     int i;
 170
 171     for (i = 0; i < 4; i++) {
 172         qemu_set_irq(s->rvic[i][irq], level);
 173     }
 174     if (irq < 32) {
 175         irq = mpcore_irq_map[irq];
 176         if (irq >= 0) {
 177             qemu_set_irq(s->cpuic[irq], level);
 178         }
 179     }
 180 }
 181
 182 static int realview_mpcore_init(SysBusDevice *dev)
 183 {
 184     mpcore_rirq_state *s = FROM_SYSBUS(mpcore_rirq_state, dev);
 185     DeviceState *gic;
 186     DeviceState *priv;
 187     int n;
 188     int i;
 189
 190     priv = qdev_create(NULL, "arm11mpcore_priv");
 191     qdev_prop_set_uint32(priv, "num-cpu", s->num_cpu);
 192     qdev_init_nofail(priv);
 193     s->priv = sysbus_from_qdev(priv);
 194     sysbus_pass_irq(dev, s->priv);
 195     for (i = 0; i < 32; i++) {
 196         s->cpuic[i] = qdev_get_gpio_in(priv, i);
 197     }
 198     /* ??? IRQ routing is hardcoded to "normal" mode.  */
 199     for (n = 0; n < 4; n++) {
 200         gic = sysbus_create_simple("realview_gic", 0x10040000 + n * 0x10000,
 201                                    s->cpuic[10 + n]);
 202         for (i = 0; i < 64; i++) {
 203             s->rvic[n][i] = qdev_get_gpio_in(gic, i);
 204         }
 205     }
 206     qdev_init_gpio_in(&dev->qdev, mpcore_rirq_set_irq, 64);
 207     sysbus_init_mmio(dev, sysbus_mmio_get_region(s->priv, 0));
 208     return 0;
 209 }
 210
 211 static Property mpcore_rirq_properties[] = {
 212     DEFINE_PROP_UINT32("num-cpu", mpcore_rirq_state, num_cpu, 1),
 213     DEFINE_PROP_END_OF_LIST(),
 214 };
 215
 216 static void mpcore_rirq_class_init(ObjectClass *klass, void *data)
 217 {
 218     DeviceClass *dc = DEVICE_CLASS(klass);
 219     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 220
 221     k->init = realview_mpcore_init;
 222     dc->props = mpcore_rirq_properties;
 223 }
 224
 225 static TypeInfo mpcore_rirq_info = {
 226     .name          = "realview_mpcore",
 227     .parent        = TYPE_SYS_BUS_DEVICE,
 228     .instance_size = sizeof(mpcore_rirq_state),
 229     .class_init    = mpcore_rirq_class_init,
 230 };
 231
 232 static Property mpcore_priv_properties[] = {
 233     DEFINE_PROP_UINT32("num-cpu", mpcore_priv_state, num_cpu, 1),
 234     /* The ARM11 MPCORE TRM says the on-chip controller may have
 235      * anything from 0 to 224 external interrupt IRQ lines (with another
 236      * 32 internal). We default to 32+32, which is the number provided by
 237      * the ARM11 MPCore test chip in the Realview Versatile Express
 238      * coretile. Other boards may differ and should set this property
 239      * appropriately. Some Linux kernels may not boot if the hardware
 240      * has more IRQ lines than the kernel expects.
 241      */
 242     DEFINE_PROP_UINT32("num-irq", mpcore_priv_state, num_irq, 64),
 243     DEFINE_PROP_END_OF_LIST(),
 244 };
 245
 246 static void mpcore_priv_class_init(ObjectClass *klass, void *data)
 247 {
 248     DeviceClass *dc = DEVICE_CLASS(klass);
 249     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 250
 251     k->init = mpcore_priv_init;
 252     dc->props = mpcore_priv_properties;
 253 }
 254
 255 static TypeInfo mpcore_priv_info = {
 256     .name          = "arm11mpcore_priv",
 257     .parent        = TYPE_SYS_BUS_DEVICE,
 258     .instance_size = sizeof(mpcore_priv_state),
 259     .class_init    = mpcore_priv_class_init,
 260 };
 261
 262 static void arm11mpcore_register_types(void)
 263 {
 264     type_register_static(&mpcore_rirq_info);
 265     type_register_static(&mpcore_priv_info);
 266 }
 267
 268 type_init(arm11mpcore_register_types)