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diff --git a/sys/amd64/vmm/io/vatpic.h b/sys/amd64/vmm/io/vatpic.h
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+/*-
+ * Copyright (c) 2014 Tycho Nightingale <tycho.nightingale@pluribusnetworks.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _VATPIC_H_
+#define _VATPIC_H_
+
+#include <isa/isareg.h>
+
+#define ICU_IMR_OFFSET 1
+
+#define IO_ELCR1 0x4d0
+#define IO_ELCR2 0x4d1
+
+struct vatpic *vatpic_init(struct vm *vm);
+void vatpic_cleanup(struct vatpic *vatpic);
+
+int vatpic_master_handler(void *vm, int vcpuid, bool in, int port, int bytes,
+ uint32_t *eax);
+int vatpic_slave_handler(void *vm, int vcpuid, bool in, int port, int bytes,
+ uint32_t *eax);
+int vatpic_elc_handler(void *vm, int vcpuid, bool in, int port, int bytes,
+ uint32_t *eax);
+
+int vatpic_assert_irq(struct vm *vm, int irq);
+int vatpic_deassert_irq(struct vm *vm, int irq);
+int vatpic_pulse_irq(struct vm *vm, int irq);
+
+void vatpic_pending_intr(struct vm *vm, int *vecptr);
+void vatpic_intr_accepted(struct vm *vm, int vector);
+
+#endif /* _VATPIC_H_ */
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