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diff --git a/src/recompiler/ioport.h b/src/recompiler/ioport.h
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+/*
+ * defines ioport related functions
+ *
+ * Copyright (c) 2003 Fabrice Bellard
+ *
+ * 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/>.
+ */
+
+/*
+ * Oracle LGPL Disclaimer: For the avoidance of doubt, except that if any license choice
+ * other than GPL or LGPL is available it will apply instead, Oracle elects to use only
+ * the Lesser General Public License version 2.1 (LGPLv2) at this time for any software where
+ * a choice of LGPL license versions is made available with the language indicating
+ * that LGPLv2 or any later version may be used, or where a choice of which version
+ * of the LGPL is applied is otherwise unspecified.
+ */
+
+/**************************************************************************
+ * IO ports API
+ */
+
+#ifndef IOPORT_H
+#define IOPORT_H
+
+#include "qemu-common.h"
+
+typedef uint32_t pio_addr_t;
+#define FMT_pioaddr PRIx32
+
+#define MAX_IOPORTS (64 * 1024)
+#define IOPORTS_MASK (MAX_IOPORTS - 1)
+
+/* These should really be in isa.h, but are here to make pc.h happy. */
+typedef void (IOPortWriteFunc)(void *opaque, uint32_t address, uint32_t data);
+typedef uint32_t (IOPortReadFunc)(void *opaque, uint32_t address);
+
+int register_ioport_read(pio_addr_t start, int length, int size,
+ IOPortReadFunc *func, void *opaque);
+int register_ioport_write(pio_addr_t start, int length, int size,
+ IOPortWriteFunc *func, void *opaque);
+void isa_unassign_ioport(pio_addr_t start, int length);
+
+
+#ifndef VBOX
+void cpu_outb(pio_addr_t addr, uint8_t val);
+void cpu_outw(pio_addr_t addr, uint16_t val);
+void cpu_outl(pio_addr_t addr, uint32_t val);
+uint8_t cpu_inb(pio_addr_t addr);
+uint16_t cpu_inw(pio_addr_t addr);
+uint32_t cpu_inl(pio_addr_t addr);
+#else
+void cpu_outb(CPUX86State *env, pio_addr_t addr, uint8_t val);
+void cpu_outw(CPUX86State *env, pio_addr_t addr, uint16_t val);
+void cpu_outl(CPUX86State *env, pio_addr_t addr, uint32_t val);
+uint8_t cpu_inb(CPUX86State *env, pio_addr_t addr);
+uint16_t cpu_inw(CPUX86State *env, pio_addr_t addr);
+uint32_t cpu_inl(CPUX86State *env, pio_addr_t addr);
+#endif
+
+#endif /* IOPORT_H */