1 files changed, 75 insertions, 0 deletions
diff --git a/src/include/hw/timer/i8254.h b/src/include/hw/timer/i8254.h
new file mode 100644
index 0000000..4349033
--- /dev/null
+++ b/src/include/hw/timer/i8254.h
@@ -0,0 +1,75 @@
+/*
+ * QEMU 8253/8254 interval timer emulation
+ *
+ * Copyright (c) 2003-2004 Fabrice Bellard
+ *
+ * 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.
+ */
+
+#ifndef HW_I8254_H
+#define HW_I8254_H
+
+#include "hw/hw.h"
+#include "hw/isa/isa.h"
+
+#define PIT_FREQ 1193182
+
+typedef struct PITChannelInfo {
+    int gate;
+    int mode;
+    int initial_count;
+    int out;
+} PITChannelInfo;
+
+#define TYPE_I8254 "isa-pit"
+#define TYPE_KVM_I8254 "kvm-pit"
+
+static inline ISADevice *pit_init(ISABus *bus, int base, int isa_irq,
+                                  qemu_irq alt_irq)
+{
+    DeviceState *dev;
+    ISADevice *d;
+
+    d = isa_create(bus, TYPE_I8254);
+    dev = DEVICE(d);
+    qdev_prop_set_uint32(dev, "iobase", base);
+    qdev_init_nofail(dev);
+    qdev_connect_gpio_out(dev, 0,
+                          isa_irq >= 0 ? isa_get_irq(d, isa_irq) : alt_irq);
+
+    return d;
+}
+
+static inline ISADevice *kvm_pit_init(ISABus *bus, int base)
+{
+    DeviceState *dev;
+    ISADevice *d;
+
+    d = isa_create(bus, TYPE_KVM_I8254);
+    dev = DEVICE(d);
+    qdev_prop_set_uint32(dev, "iobase", base);
+    qdev_init_nofail(dev);
+
+    return d;
+}
+
+void pit_set_gate(ISADevice *dev, int channel, int val);
+void pit_get_channel_info(ISADevice *dev, int channel, PITChannelInfo *info);
+
+#endif /* !HW_I8254_H */