1 files changed, 219 insertions, 0 deletions
diff --git a/hw/intc/i8259_common.c b/hw/intc/i8259_common.c
new file mode 100644
index 000000000..d90b40fe4
--- /dev/null
+++ b/hw/intc/i8259_common.c
@@ -0,0 +1,219 @@
+/*
+ * QEMU 8259 - common bits of emulated and KVM kernel model
+ *
+ * Copyright (c) 2003-2004 Fabrice Bellard
+ * Copyright (c) 2011      Jan Kiszka, Siemens AG
+ *
+ * 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 "qemu/osdep.h"
+#include "hw/intc/i8259.h"
+#include "hw/isa/i8259_internal.h"
+#include "hw/qdev-properties.h"
+#include "migration/vmstate.h"
+#include "monitor/monitor.h"
+#include "qapi/error.h"
+
+static int irq_level[16];
+static uint64_t irq_count[16];
+
+void pic_reset_common(PICCommonState *s)
+{
+    s->last_irr = 0;
+    s->irr &= s->elcr;
+    s->imr = 0;
+    s->isr = 0;
+    s->priority_add = 0;
+    s->irq_base = 0;
+    s->read_reg_select = 0;
+    s->poll = 0;
+    s->special_mask = 0;
+    s->init_state = 0;
+    s->auto_eoi = 0;
+    s->rotate_on_auto_eoi = 0;
+    s->special_fully_nested_mode = 0;
+    s->init4 = 0;
+    s->single_mode = 0;
+    /* Note: ELCR is not reset */
+}
+
+static int pic_dispatch_pre_save(void *opaque)
+{
+    PICCommonState *s = opaque;
+    PICCommonClass *info = PIC_COMMON_GET_CLASS(s);
+
+    if (info->pre_save) {
+        info->pre_save(s);
+    }
+
+    return 0;
+}
+
+static int pic_dispatch_post_load(void *opaque, int version_id)
+{
+    PICCommonState *s = opaque;
+    PICCommonClass *info = PIC_COMMON_GET_CLASS(s);
+
+    if (info->post_load) {
+        info->post_load(s);
+    }
+    return 0;
+}
+
+static void pic_common_realize(DeviceState *dev, Error **errp)
+{
+    PICCommonState *s = PIC_COMMON(dev);
+    ISADevice *isa = ISA_DEVICE(dev);
+
+    isa_register_ioport(isa, &s->base_io, s->iobase);
+    if (s->elcr_addr != -1) {
+        isa_register_ioport(isa, &s->elcr_io, s->elcr_addr);
+    }
+
+    qdev_set_legacy_instance_id(dev, s->iobase, 1);
+}
+
+ISADevice *i8259_init_chip(const char *name, ISABus *bus, bool master)
+{
+    DeviceState *dev;
+    ISADevice *isadev;
+
+    isadev = isa_new(name);
+    dev = DEVICE(isadev);
+    qdev_prop_set_uint32(dev, "iobase", master ? 0x20 : 0xa0);
+    qdev_prop_set_uint32(dev, "elcr_addr", master ? 0x4d0 : 0x4d1);
+    qdev_prop_set_uint8(dev, "elcr_mask", master ? 0xf8 : 0xde);
+    qdev_prop_set_bit(dev, "master", master);
+    isa_realize_and_unref(isadev, bus, &error_fatal);
+
+    return isadev;
+}
+
+void pic_stat_update_irq(int irq, int level)
+{
+    if (level != irq_level[irq]) {
+        irq_level[irq] = level;
+        if (level == 1) {
+            irq_count[irq]++;
+        }
+    }
+}
+
+bool pic_get_statistics(InterruptStatsProvider *obj,
+                        uint64_t **irq_counts, unsigned int *nb_irqs)
+{
+    PICCommonState *s = PIC_COMMON(obj);
+
+    if (s->master) {
+        *irq_counts = irq_count;
+        *nb_irqs = ARRAY_SIZE(irq_count);
+    } else {
+        *irq_counts = NULL;
+        *nb_irqs = 0;
+    }
+
+    return true;
+}
+
+void pic_print_info(InterruptStatsProvider *obj, Monitor *mon)
+{
+    PICCommonState *s = PIC_COMMON(obj);
+
+    pic_dispatch_pre_save(s);
+    monitor_printf(mon, "pic%d: irr=%02x imr=%02x isr=%02x hprio=%d "
+                   "irq_base=%02x rr_sel=%d elcr=%02x fnm=%d\n",
+                   s->master ? 0 : 1, s->irr, s->imr, s->isr, s->priority_add,
+                   s->irq_base, s->read_reg_select, s->elcr,
+                   s->special_fully_nested_mode);
+}
+
+static const VMStateDescription vmstate_pic_common = {
+    .name = "i8259",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .pre_save = pic_dispatch_pre_save,
+    .post_load = pic_dispatch_post_load,
+    .fields = (VMStateField[]) {
+        VMSTATE_UINT8(last_irr, PICCommonState),
+        VMSTATE_UINT8(irr, PICCommonState),
+        VMSTATE_UINT8(imr, PICCommonState),
+        VMSTATE_UINT8(isr, PICCommonState),
+        VMSTATE_UINT8(priority_add, PICCommonState),
+        VMSTATE_UINT8(irq_base, PICCommonState),
+        VMSTATE_UINT8(read_reg_select, PICCommonState),
+        VMSTATE_UINT8(poll, PICCommonState),
+        VMSTATE_UINT8(special_mask, PICCommonState),
+        VMSTATE_UINT8(init_state, PICCommonState),
+        VMSTATE_UINT8(auto_eoi, PICCommonState),
+        VMSTATE_UINT8(rotate_on_auto_eoi, PICCommonState),
+        VMSTATE_UINT8(special_fully_nested_mode, PICCommonState),
+        VMSTATE_UINT8(init4, PICCommonState),
+        VMSTATE_UINT8(single_mode, PICCommonState),
+        VMSTATE_UINT8(elcr, PICCommonState),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+static Property pic_properties_common[] = {
+    DEFINE_PROP_UINT32("iobase", PICCommonState, iobase,  -1),
+    DEFINE_PROP_UINT32("elcr_addr", PICCommonState, elcr_addr,  -1),
+    DEFINE_PROP_UINT8("elcr_mask", PICCommonState, elcr_mask,  -1),
+    DEFINE_PROP_BIT("master", PICCommonState, master,  0, false),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void pic_common_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    InterruptStatsProviderClass *ic = INTERRUPT_STATS_PROVIDER_CLASS(klass);
+
+    dc->vmsd = &vmstate_pic_common;
+    device_class_set_props(dc, pic_properties_common);
+    dc->realize = pic_common_realize;
+    /*
+     * Reason: unlike ordinary ISA devices, the PICs need additional
+     * wiring: its IRQ input lines are set up by board code, and the
+     * wiring of the slave to the master is hard-coded in device model
+     * code.
+     */
+    dc->user_creatable = false;
+    ic->get_statistics = pic_get_statistics;
+    ic->print_info = pic_print_info;
+}
+
+static const TypeInfo pic_common_type = {
+    .name = TYPE_PIC_COMMON,
+    .parent = TYPE_ISA_DEVICE,
+    .instance_size = sizeof(PICCommonState),
+    .class_size = sizeof(PICCommonClass),
+    .class_init = pic_common_class_init,
+    .abstract = true,
+    .interfaces = (InterfaceInfo[]) {
+        { TYPE_INTERRUPT_STATS_PROVIDER },
+        { }
+    },
+};
+
+static void pic_common_register_types(void)
+{
+    type_register_static(&pic_common_type);
+}
+
+type_init(pic_common_register_types)