hw: move timer devices to hw/timer/, configure with default-configs/

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 404 insertions, 0 deletions

diff --git a/hw/timer/grlib_gptimer.c b/hw/timer/grlib_gptimer.c
new file mode 100644
index 0000000000..7043a34684
--- /dev/null
+++ b/hw/timer/grlib_gptimer.c
@@ -0,0 +1,404 @@
+/*
+ * QEMU GRLIB GPTimer Emulator
+ *
+ * Copyright (c) 2010-2011 AdaCore
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "hw/sysbus.h"
+#include "qemu/timer.h"
+#include "hw/ptimer.h"
+
+#include "trace.h"
+
+#define UNIT_REG_SIZE    16     /* Size of memory mapped regs for the unit */
+#define GPTIMER_REG_SIZE 16     /* Size of memory mapped regs for a GPTimer */
+
+#define GPTIMER_MAX_TIMERS 8
+
+/* GPTimer Config register fields */
+#define GPTIMER_ENABLE      (1 << 0)
+#define GPTIMER_RESTART     (1 << 1)
+#define GPTIMER_LOAD        (1 << 2)
+#define GPTIMER_INT_ENABLE  (1 << 3)
+#define GPTIMER_INT_PENDING (1 << 4)
+#define GPTIMER_CHAIN       (1 << 5) /* Not supported */
+#define GPTIMER_DEBUG_HALT  (1 << 6) /* Not supported */
+
+/* Memory mapped register offsets */
+#define SCALER_OFFSET         0x00
+#define SCALER_RELOAD_OFFSET  0x04
+#define CONFIG_OFFSET         0x08
+#define COUNTER_OFFSET        0x00
+#define COUNTER_RELOAD_OFFSET 0x04
+#define TIMER_BASE            0x10
+
+typedef struct GPTimer     GPTimer;
+typedef struct GPTimerUnit GPTimerUnit;
+
+struct GPTimer {
+    QEMUBH *bh;
+    struct ptimer_state *ptimer;
+
+    qemu_irq     irq;
+    int          id;
+    GPTimerUnit *unit;
+
+    /* registers */
+    uint32_t counter;
+    uint32_t reload;
+    uint32_t config;
+};
+
+struct GPTimerUnit {
+    SysBusDevice  busdev;
+    MemoryRegion iomem;
+
+    uint32_t nr_timers;         /* Number of timers available */
+    uint32_t freq_hz;           /* System frequency */
+    uint32_t irq_line;          /* Base irq line */
+
+    GPTimer *timers;
+
+    /* registers */
+    uint32_t scaler;
+    uint32_t reload;
+    uint32_t config;
+};
+
+static void grlib_gptimer_enable(GPTimer *timer)
+{
+    assert(timer != NULL);
+
+
+    ptimer_stop(timer->ptimer);
+
+    if (!(timer->config & GPTIMER_ENABLE)) {
+        /* Timer disabled */
+        trace_grlib_gptimer_disabled(timer->id, timer->config);
+        return;
+    }
+
+    /* ptimer is triggered when the counter reach 0 but GPTimer is triggered at
+       underflow. Set count + 1 to simulate the GPTimer behavior. */
+
+    trace_grlib_gptimer_enable(timer->id, timer->counter + 1);
+
+    ptimer_set_count(timer->ptimer, timer->counter + 1);
+    ptimer_run(timer->ptimer, 1);
+}
+
+static void grlib_gptimer_restart(GPTimer *timer)
+{
+    assert(timer != NULL);
+
+    trace_grlib_gptimer_restart(timer->id, timer->reload);
+
+    timer->counter = timer->reload;
+    grlib_gptimer_enable(timer);
+}
+
+static void grlib_gptimer_set_scaler(GPTimerUnit *unit, uint32_t scaler)
+{
+    int i = 0;
+    uint32_t value = 0;
+
+    assert(unit != NULL);
+
+    if (scaler > 0) {
+        value = unit->freq_hz / (scaler + 1);
+    } else {
+        value = unit->freq_hz;
+    }
+
+    trace_grlib_gptimer_set_scaler(scaler, value);
+
+    for (i = 0; i < unit->nr_timers; i++) {
+        ptimer_set_freq(unit->timers[i].ptimer, value);
+    }
+}
+
+static void grlib_gptimer_hit(void *opaque)
+{
+    GPTimer *timer = opaque;
+    assert(timer != NULL);
+
+    trace_grlib_gptimer_hit(timer->id);
+
+    /* Timer expired */
+
+    if (timer->config & GPTIMER_INT_ENABLE) {
+        /* Set the pending bit (only unset by write in the config register) */
+        timer->config |= GPTIMER_INT_PENDING;
+        qemu_irq_pulse(timer->irq);
+    }
+
+    if (timer->config & GPTIMER_RESTART) {
+        grlib_gptimer_restart(timer);
+    }
+}
+
+static uint64_t grlib_gptimer_read(void *opaque, hwaddr addr,
+                                   unsigned size)
+{
+    GPTimerUnit        *unit  = opaque;
+    hwaddr  timer_addr;
+    int                 id;
+    uint32_t            value = 0;
+
+    addr &= 0xff;
+
+    /* Unit registers */
+    switch (addr) {
+    case SCALER_OFFSET:
+        trace_grlib_gptimer_readl(-1, addr, unit->scaler);
+        return unit->scaler;
+
+    case SCALER_RELOAD_OFFSET:
+        trace_grlib_gptimer_readl(-1, addr, unit->reload);
+        return unit->reload;
+
+    case CONFIG_OFFSET:
+        trace_grlib_gptimer_readl(-1, addr, unit->config);
+        return unit->config;
+
+    default:
+        break;
+    }
+
+    timer_addr = (addr % TIMER_BASE);
+    id         = (addr - TIMER_BASE) / TIMER_BASE;
+
+    if (id >= 0 && id < unit->nr_timers) {
+
+        /* GPTimer registers */
+        switch (timer_addr) {
+        case COUNTER_OFFSET:
+            value = ptimer_get_count(unit->timers[id].ptimer);
+            trace_grlib_gptimer_readl(id, addr, value);
+            return value;
+
+        case COUNTER_RELOAD_OFFSET:
+            value = unit->timers[id].reload;
+            trace_grlib_gptimer_readl(id, addr, value);
+            return value;
+
+        case CONFIG_OFFSET:
+            trace_grlib_gptimer_readl(id, addr, unit->timers[id].config);
+            return unit->timers[id].config;
+
+        default:
+            break;
+        }
+
+    }
+
+    trace_grlib_gptimer_readl(-1, addr, 0);
+    return 0;
+}
+
+static void grlib_gptimer_write(void *opaque, hwaddr addr,
+                                uint64_t value, unsigned size)
+{
+    GPTimerUnit        *unit = opaque;
+    hwaddr  timer_addr;
+    int                 id;
+
+    addr &= 0xff;
+
+    /* Unit registers */
+    switch (addr) {
+    case SCALER_OFFSET:
+        value &= 0xFFFF; /* clean up the value */
+        unit->scaler = value;
+        trace_grlib_gptimer_writel(-1, addr, unit->scaler);
+        return;
+
+    case SCALER_RELOAD_OFFSET:
+        value &= 0xFFFF; /* clean up the value */
+        unit->reload = value;
+        trace_grlib_gptimer_writel(-1, addr, unit->reload);
+        grlib_gptimer_set_scaler(unit, value);
+        return;
+
+    case CONFIG_OFFSET:
+        /* Read Only (disable timer freeze not supported) */
+        trace_grlib_gptimer_writel(-1, addr, 0);
+        return;
+
+    default:
+        break;
+    }
+
+    timer_addr = (addr % TIMER_BASE);
+    id         = (addr - TIMER_BASE) / TIMER_BASE;
+
+    if (id >= 0 && id < unit->nr_timers) {
+
+        /* GPTimer registers */
+        switch (timer_addr) {
+        case COUNTER_OFFSET:
+            trace_grlib_gptimer_writel(id, addr, value);
+            unit->timers[id].counter = value;
+            grlib_gptimer_enable(&unit->timers[id]);
+            return;
+
+        case COUNTER_RELOAD_OFFSET:
+            trace_grlib_gptimer_writel(id, addr, value);
+            unit->timers[id].reload = value;
+            return;
+
+        case CONFIG_OFFSET:
+            trace_grlib_gptimer_writel(id, addr, value);
+
+            if (value & GPTIMER_INT_PENDING) {
+                /* clear pending bit */
+                value &= ~GPTIMER_INT_PENDING;
+            } else {
+                /* keep pending bit */
+                value |= unit->timers[id].config & GPTIMER_INT_PENDING;
+            }
+
+            unit->timers[id].config = value;
+
+            /* gptimer_restart calls gptimer_enable, so if "enable" and "load"
+               bits are present, we just have to call restart. */
+
+            if (value & GPTIMER_LOAD) {
+                grlib_gptimer_restart(&unit->timers[id]);
+            } else if (value & GPTIMER_ENABLE) {
+                grlib_gptimer_enable(&unit->timers[id]);
+            }
+
+            /* These fields must always be read as 0 */
+            value &= ~(GPTIMER_LOAD & GPTIMER_DEBUG_HALT);
+
+            unit->timers[id].config = value;
+            return;
+
+        default:
+            break;
+        }
+
+    }
+
+    trace_grlib_gptimer_writel(-1, addr, value);
+}
+
+static const MemoryRegionOps grlib_gptimer_ops = {
+    .read = grlib_gptimer_read,
+    .write = grlib_gptimer_write,
+    .endianness = DEVICE_NATIVE_ENDIAN,
+    .valid = {
+        .min_access_size = 4,
+        .max_access_size = 4,
+    },
+};
+
+static void grlib_gptimer_reset(DeviceState *d)
+{
+    GPTimerUnit *unit = container_of(d, GPTimerUnit, busdev.qdev);
+    int          i    = 0;
+
+    assert(unit != NULL);
+
+    unit->scaler = 0;
+    unit->reload = 0;
+    unit->config = 0;
+
+    unit->config  = unit->nr_timers;
+    unit->config |= unit->irq_line << 3;
+    unit->config |= 1 << 8;     /* separate interrupt */
+    unit->config |= 1 << 9;     /* Disable timer freeze */
+
+
+    for (i = 0; i < unit->nr_timers; i++) {
+        GPTimer *timer = &unit->timers[i];
+
+        timer->counter = 0;
+        timer->reload = 0;
+        timer->config = 0;
+        ptimer_stop(timer->ptimer);
+        ptimer_set_count(timer->ptimer, 0);
+        ptimer_set_freq(timer->ptimer, unit->freq_hz);
+    }
+}
+
+static int grlib_gptimer_init(SysBusDevice *dev)
+{
+    GPTimerUnit  *unit = FROM_SYSBUS(typeof(*unit), dev);
+    unsigned int  i;
+
+    assert(unit->nr_timers > 0);
+    assert(unit->nr_timers <= GPTIMER_MAX_TIMERS);
+
+    unit->timers = g_malloc0(sizeof unit->timers[0] * unit->nr_timers);
+
+    for (i = 0; i < unit->nr_timers; i++) {
+        GPTimer *timer = &unit->timers[i];
+
+        timer->unit   = unit;
+        timer->bh     = qemu_bh_new(grlib_gptimer_hit, timer);
+        timer->ptimer = ptimer_init(timer->bh);
+        timer->id     = i;
+
+        /* One IRQ line for each timer */
+        sysbus_init_irq(dev, &timer->irq);
+
+        ptimer_set_freq(timer->ptimer, unit->freq_hz);
+    }
+
+    memory_region_init_io(&unit->iomem, &grlib_gptimer_ops, unit, "gptimer",
+                          UNIT_REG_SIZE + GPTIMER_REG_SIZE * unit->nr_timers);
+
+    sysbus_init_mmio(dev, &unit->iomem);
+    return 0;
+}
+
+static Property grlib_gptimer_properties[] = {
+    DEFINE_PROP_UINT32("frequency", GPTimerUnit, freq_hz,   40000000),
+    DEFINE_PROP_UINT32("irq-line",  GPTimerUnit, irq_line,  8),
+    DEFINE_PROP_UINT32("nr-timers", GPTimerUnit, nr_timers, 2),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void grlib_gptimer_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
+
+    k->init = grlib_gptimer_init;
+    dc->reset = grlib_gptimer_reset;
+    dc->props = grlib_gptimer_properties;
+}
+
+static const TypeInfo grlib_gptimer_info = {
+    .name          = "grlib,gptimer",
+    .parent        = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(GPTimerUnit),
+    .class_init    = grlib_gptimer_class_init,
+};
+
+static void grlib_gptimer_register_types(void)
+{
+    type_register_static(&grlib_gptimer_info);
+}
+
+type_init(grlib_gptimer_register_types)