Add qemu 2.4.0

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

1 files changed, 235 insertions, 0 deletions

diff --git a/qemu/hw/timer/lm32_timer.c b/qemu/hw/timer/lm32_timer.c
new file mode 100644
index 000000000..d2ab1e74b
--- /dev/null
+++ b/qemu/hw/timer/lm32_timer.c
@@ -0,0 +1,235 @@
+/*
+ *  QEMU model of the LatticeMico32 timer block.
+ *
+ *  Copyright (c) 2010 Michael Walle <michael@walle.cc>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ *
+ *
+ * Specification available at:
+ *   http://www.latticesemi.com/documents/mico32timer.pdf
+ */
+
+#include "hw/hw.h"
+#include "hw/sysbus.h"
+#include "trace.h"
+#include "qemu/timer.h"
+#include "hw/ptimer.h"
+#include "qemu/error-report.h"
+#include "qemu/main-loop.h"
+
+#define DEFAULT_FREQUENCY (50*1000000)
+
+enum {
+    R_SR = 0,
+    R_CR,
+    R_PERIOD,
+    R_SNAPSHOT,
+    R_MAX
+};
+
+enum {
+    SR_TO    = (1 << 0),
+    SR_RUN   = (1 << 1),
+};
+
+enum {
+    CR_ITO   = (1 << 0),
+    CR_CONT  = (1 << 1),
+    CR_START = (1 << 2),
+    CR_STOP  = (1 << 3),
+};
+
+#define TYPE_LM32_TIMER "lm32-timer"
+#define LM32_TIMER(obj) OBJECT_CHECK(LM32TimerState, (obj), TYPE_LM32_TIMER)
+
+struct LM32TimerState {
+    SysBusDevice parent_obj;
+
+    MemoryRegion iomem;
+
+    QEMUBH *bh;
+    ptimer_state *ptimer;
+
+    qemu_irq irq;
+    uint32_t freq_hz;
+
+    uint32_t regs[R_MAX];
+};
+typedef struct LM32TimerState LM32TimerState;
+
+static void timer_update_irq(LM32TimerState *s)
+{
+    int state = (s->regs[R_SR] & SR_TO) && (s->regs[R_CR] & CR_ITO);
+
+    trace_lm32_timer_irq_state(state);
+    qemu_set_irq(s->irq, state);
+}
+
+static uint64_t timer_read(void *opaque, hwaddr addr, unsigned size)
+{
+    LM32TimerState *s = opaque;
+    uint32_t r = 0;
+
+    addr >>= 2;
+    switch (addr) {
+    case R_SR:
+    case R_CR:
+    case R_PERIOD:
+        r = s->regs[addr];
+        break;
+    case R_SNAPSHOT:
+        r = (uint32_t)ptimer_get_count(s->ptimer);
+        break;
+    default:
+        error_report("lm32_timer: read access to unknown register 0x"
+                TARGET_FMT_plx, addr << 2);
+        break;
+    }
+
+    trace_lm32_timer_memory_read(addr << 2, r);
+    return r;
+}
+
+static void timer_write(void *opaque, hwaddr addr,
+                        uint64_t value, unsigned size)
+{
+    LM32TimerState *s = opaque;
+
+    trace_lm32_timer_memory_write(addr, value);
+
+    addr >>= 2;
+    switch (addr) {
+    case R_SR:
+        s->regs[R_SR] &= ~SR_TO;
+        break;
+    case R_CR:
+        s->regs[R_CR] = value;
+        if (s->regs[R_CR] & CR_START) {
+            ptimer_run(s->ptimer, 1);
+        }
+        if (s->regs[R_CR] & CR_STOP) {
+            ptimer_stop(s->ptimer);
+        }
+        break;
+    case R_PERIOD:
+        s->regs[R_PERIOD] = value;
+        ptimer_set_count(s->ptimer, value);
+        break;
+    case R_SNAPSHOT:
+        error_report("lm32_timer: write access to read only register 0x"
+                TARGET_FMT_plx, addr << 2);
+        break;
+    default:
+        error_report("lm32_timer: write access to unknown register 0x"
+                TARGET_FMT_plx, addr << 2);
+        break;
+    }
+    timer_update_irq(s);
+}
+
+static const MemoryRegionOps timer_ops = {
+    .read = timer_read,
+    .write = timer_write,
+    .endianness = DEVICE_NATIVE_ENDIAN,
+    .valid = {
+        .min_access_size = 4,
+        .max_access_size = 4,
+    },
+};
+
+static void timer_hit(void *opaque)
+{
+    LM32TimerState *s = opaque;
+
+    trace_lm32_timer_hit();
+
+    s->regs[R_SR] |= SR_TO;
+
+    if (s->regs[R_CR] & CR_CONT) {
+        ptimer_set_count(s->ptimer, s->regs[R_PERIOD]);
+        ptimer_run(s->ptimer, 1);
+    }
+    timer_update_irq(s);
+}
+
+static void timer_reset(DeviceState *d)
+{
+    LM32TimerState *s = LM32_TIMER(d);
+    int i;
+
+    for (i = 0; i < R_MAX; i++) {
+        s->regs[i] = 0;
+    }
+    ptimer_stop(s->ptimer);
+}
+
+static int lm32_timer_init(SysBusDevice *dev)
+{
+    LM32TimerState *s = LM32_TIMER(dev);
+
+    sysbus_init_irq(dev, &s->irq);
+
+    s->bh = qemu_bh_new(timer_hit, s);
+    s->ptimer = ptimer_init(s->bh);
+    ptimer_set_freq(s->ptimer, s->freq_hz);
+
+    memory_region_init_io(&s->iomem, OBJECT(s), &timer_ops, s,
+                          "timer", R_MAX * 4);
+    sysbus_init_mmio(dev, &s->iomem);
+
+    return 0;
+}
+
+static const VMStateDescription vmstate_lm32_timer = {
+    .name = "lm32-timer",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .fields = (VMStateField[]) {
+        VMSTATE_PTIMER(ptimer, LM32TimerState),
+        VMSTATE_UINT32(freq_hz, LM32TimerState),
+        VMSTATE_UINT32_ARRAY(regs, LM32TimerState, R_MAX),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+static Property lm32_timer_properties[] = {
+    DEFINE_PROP_UINT32("frequency", LM32TimerState, freq_hz, DEFAULT_FREQUENCY),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void lm32_timer_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
+
+    k->init = lm32_timer_init;
+    dc->reset = timer_reset;
+    dc->vmsd = &vmstate_lm32_timer;
+    dc->props = lm32_timer_properties;
+}
+
+static const TypeInfo lm32_timer_info = {
+    .name          = TYPE_LM32_TIMER,
+    .parent        = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(LM32TimerState),
+    .class_init    = lm32_timer_class_init,
+};
+
+static void lm32_timer_register_types(void)
+{
+    type_register_static(&lm32_timer_info);
+}
+
+type_init(lm32_timer_register_types)