Add qemu 2.4.0

Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>

1 files changed, 300 insertions, 0 deletions

diff --git a/qemu/hw/timer/arm_mptimer.c b/qemu/hw/timer/arm_mptimer.c
new file mode 100644
index 000000000..3e59c2a28
--- /dev/null
+++ b/qemu/hw/timer/arm_mptimer.c
@@ -0,0 +1,300 @@
+/*
+ * Private peripheral timer/watchdog blocks for ARM 11MPCore and A9MP
+ *
+ * Copyright (c) 2006-2007 CodeSourcery.
+ * Copyright (c) 2011 Linaro Limited
+ * Written by Paul Brook, Peter Maydell
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "hw/timer/arm_mptimer.h"
+#include "qemu/timer.h"
+#include "qom/cpu.h"
+
+/* This device implements the per-cpu private timer and watchdog block
+ * which is used in both the ARM11MPCore and Cortex-A9MP.
+ */
+
+static inline int get_current_cpu(ARMMPTimerState *s)
+{
+    if (current_cpu->cpu_index >= s->num_cpu) {
+        hw_error("arm_mptimer: num-cpu %d but this cpu is %d!\n",
+                 s->num_cpu, current_cpu->cpu_index);
+    }
+    return current_cpu->cpu_index;
+}
+
+static inline void timerblock_update_irq(TimerBlock *tb)
+{
+    qemu_set_irq(tb->irq, tb->status && (tb->control & 4));
+}
+
+/* Return conversion factor from mpcore timer ticks to qemu timer ticks.  */
+static inline uint32_t timerblock_scale(TimerBlock *tb)
+{
+    return (((tb->control >> 8) & 0xff) + 1) * 10;
+}
+
+static void timerblock_reload(TimerBlock *tb, int restart)
+{
+    if (tb->count == 0) {
+        return;
+    }
+    if (restart) {
+        tb->tick = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
+    }
+    tb->tick += (int64_t)tb->count * timerblock_scale(tb);
+    timer_mod(tb->timer, tb->tick);
+}
+
+static void timerblock_tick(void *opaque)
+{
+    TimerBlock *tb = (TimerBlock *)opaque;
+    tb->status = 1;
+    if (tb->control & 2) {
+        tb->count = tb->load;
+        timerblock_reload(tb, 0);
+    } else {
+        tb->count = 0;
+    }
+    timerblock_update_irq(tb);
+}
+
+static uint64_t timerblock_read(void *opaque, hwaddr addr,
+                                unsigned size)
+{
+    TimerBlock *tb = (TimerBlock *)opaque;
+    int64_t val;
+    switch (addr) {
+    case 0: /* Load */
+        return tb->load;
+    case 4: /* Counter.  */
+        if (((tb->control & 1) == 0) || (tb->count == 0)) {
+            return 0;
+        }
+        /* Slow and ugly, but hopefully won't happen too often.  */
+        val = tb->tick - qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
+        val /= timerblock_scale(tb);
+        if (val < 0) {
+            val = 0;
+        }
+        return val;
+    case 8: /* Control.  */
+        return tb->control;
+    case 12: /* Interrupt status.  */
+        return tb->status;
+    default:
+        return 0;
+    }
+}
+
+static void timerblock_write(void *opaque, hwaddr addr,
+                             uint64_t value, unsigned size)
+{
+    TimerBlock *tb = (TimerBlock *)opaque;
+    int64_t old;
+    switch (addr) {
+    case 0: /* Load */
+        tb->load = value;
+        /* Fall through.  */
+    case 4: /* Counter.  */
+        if ((tb->control & 1) && tb->count) {
+            /* Cancel the previous timer.  */
+            timer_del(tb->timer);
+        }
+        tb->count = value;
+        if (tb->control & 1) {
+            timerblock_reload(tb, 1);
+        }
+        break;
+    case 8: /* Control.  */
+        old = tb->control;
+        tb->control = value;
+        if (value & 1) {
+            if ((old & 1) && (tb->count != 0)) {
+                /* Do nothing if timer is ticking right now.  */
+                break;
+            }
+            if (tb->control & 2) {
+                tb->count = tb->load;
+            }
+            timerblock_reload(tb, 1);
+        } else if (old & 1) {
+            /* Shutdown the timer.  */
+            timer_del(tb->timer);
+        }
+        break;
+    case 12: /* Interrupt status.  */
+        tb->status &= ~value;
+        timerblock_update_irq(tb);
+        break;
+    }
+}
+
+/* Wrapper functions to implement the "read timer/watchdog for
+ * the current CPU" memory regions.
+ */
+static uint64_t arm_thistimer_read(void *opaque, hwaddr addr,
+                                   unsigned size)
+{
+    ARMMPTimerState *s = (ARMMPTimerState *)opaque;
+    int id = get_current_cpu(s);
+    return timerblock_read(&s->timerblock[id], addr, size);
+}
+
+static void arm_thistimer_write(void *opaque, hwaddr addr,
+                                uint64_t value, unsigned size)
+{
+    ARMMPTimerState *s = (ARMMPTimerState *)opaque;
+    int id = get_current_cpu(s);
+    timerblock_write(&s->timerblock[id], addr, value, size);
+}
+
+static const MemoryRegionOps arm_thistimer_ops = {
+    .read = arm_thistimer_read,
+    .write = arm_thistimer_write,
+    .valid = {
+        .min_access_size = 4,
+        .max_access_size = 4,
+    },
+    .endianness = DEVICE_NATIVE_ENDIAN,
+};
+
+static const MemoryRegionOps timerblock_ops = {
+    .read = timerblock_read,
+    .write = timerblock_write,
+    .valid = {
+        .min_access_size = 4,
+        .max_access_size = 4,
+    },
+    .endianness = DEVICE_NATIVE_ENDIAN,
+};
+
+static void timerblock_reset(TimerBlock *tb)
+{
+    tb->count = 0;
+    tb->load = 0;
+    tb->control = 0;
+    tb->status = 0;
+    tb->tick = 0;
+    if (tb->timer) {
+        timer_del(tb->timer);
+    }
+}
+
+static void arm_mptimer_reset(DeviceState *dev)
+{
+    ARMMPTimerState *s = ARM_MPTIMER(dev);
+    int i;
+
+    for (i = 0; i < ARRAY_SIZE(s->timerblock); i++) {
+        timerblock_reset(&s->timerblock[i]);
+    }
+}
+
+static void arm_mptimer_init(Object *obj)
+{
+    ARMMPTimerState *s = ARM_MPTIMER(obj);
+
+    memory_region_init_io(&s->iomem, obj, &arm_thistimer_ops, s,
+                          "arm_mptimer_timer", 0x20);
+    sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->iomem);
+}
+
+static void arm_mptimer_realize(DeviceState *dev, Error **errp)
+{
+    SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
+    ARMMPTimerState *s = ARM_MPTIMER(dev);
+    int i;
+
+    if (s->num_cpu < 1 || s->num_cpu > ARM_MPTIMER_MAX_CPUS) {
+        hw_error("%s: num-cpu must be between 1 and %d\n",
+                 __func__, ARM_MPTIMER_MAX_CPUS);
+    }
+    /* We implement one timer block per CPU, and expose multiple MMIO regions:
+     *  * region 0 is "timer for this core"
+     *  * region 1 is "timer for core 0"
+     *  * region 2 is "timer for core 1"
+     * and so on.
+     * The outgoing interrupt lines are
+     *  * timer for core 0
+     *  * timer for core 1
+     * and so on.
+     */
+    for (i = 0; i < s->num_cpu; i++) {
+        TimerBlock *tb = &s->timerblock[i];
+        tb->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, timerblock_tick, tb);
+        sysbus_init_irq(sbd, &tb->irq);
+        memory_region_init_io(&tb->iomem, OBJECT(s), &timerblock_ops, tb,
+                              "arm_mptimer_timerblock", 0x20);
+        sysbus_init_mmio(sbd, &tb->iomem);
+    }
+}
+
+static const VMStateDescription vmstate_timerblock = {
+    .name = "arm_mptimer_timerblock",
+    .version_id = 2,
+    .minimum_version_id = 2,
+    .fields = (VMStateField[]) {
+        VMSTATE_UINT32(count, TimerBlock),
+        VMSTATE_UINT32(load, TimerBlock),
+        VMSTATE_UINT32(control, TimerBlock),
+        VMSTATE_UINT32(status, TimerBlock),
+        VMSTATE_INT64(tick, TimerBlock),
+        VMSTATE_TIMER_PTR(timer, TimerBlock),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+static const VMStateDescription vmstate_arm_mptimer = {
+    .name = "arm_mptimer",
+    .version_id = 2,
+    .minimum_version_id = 2,
+    .fields = (VMStateField[]) {
+        VMSTATE_STRUCT_VARRAY_UINT32(timerblock, ARMMPTimerState, num_cpu,
+                                     2, vmstate_timerblock, TimerBlock),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+static Property arm_mptimer_properties[] = {
+    DEFINE_PROP_UINT32("num-cpu", ARMMPTimerState, num_cpu, 0),
+    DEFINE_PROP_END_OF_LIST()
+};
+
+static void arm_mptimer_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    dc->realize = arm_mptimer_realize;
+    dc->vmsd = &vmstate_arm_mptimer;
+    dc->reset = arm_mptimer_reset;
+    dc->props = arm_mptimer_properties;
+}
+
+static const TypeInfo arm_mptimer_info = {
+    .name          = TYPE_ARM_MPTIMER,
+    .parent        = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(ARMMPTimerState),
+    .instance_init = arm_mptimer_init,
+    .class_init    = arm_mptimer_class_init,
+};
+
+static void arm_mptimer_register_types(void)
+{
+    type_register_static(&arm_mptimer_info);
+}
+
+type_init(arm_mptimer_register_types)