d17b5104a9
the UART FIFO. The emulation is constrained in a number of ways: 64-bit only, doesn't check for all exception conditions, limited to i/o ports emulated in userspace. Some of these constraints will be relaxed in followup commits. Requested by: grehan Reviewed by: tychon (partially and a much earlier version)
84 lines
2.6 KiB
C
84 lines
2.6 KiB
C
/*-
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* Copyright (c) 2011 NetApp, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _INOUT_H_
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#define _INOUT_H_
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#include <sys/linker_set.h>
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struct vmctx;
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struct vm_exit;
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/* Handler return values. */
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#define INOUT_ERROR -1
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#define INOUT_OK 0
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#define INOUT_RESTART 1
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#define INOUT_RESET 2
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#define INOUT_POWEROFF 3
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typedef int (*inout_func_t)(struct vmctx *ctx, int vcpu, int in, int port,
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int bytes, uint32_t *eax, void *arg);
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struct inout_port {
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const char *name;
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int port;
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int size;
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int flags;
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inout_func_t handler;
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void *arg;
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};
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#define IOPORT_F_IN 0x1
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#define IOPORT_F_OUT 0x2
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#define IOPORT_F_INOUT (IOPORT_F_IN | IOPORT_F_OUT)
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/*
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* The following flags are used internally and must not be used by
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* device models.
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*/
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#define IOPORT_F_DEFAULT 0x80000000 /* claimed by default handler */
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#define INOUT_PORT(name, port, flags, handler) \
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static struct inout_port __CONCAT(__inout_port, __LINE__) = { \
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#name, \
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(port), \
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1, \
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(flags), \
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(handler), \
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0 \
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}; \
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DATA_SET(inout_port_set, __CONCAT(__inout_port, __LINE__))
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void init_inout(void);
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int emulate_inout(struct vmctx *, int vcpu, struct vm_exit *vmexit,
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int strict);
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int register_inout(struct inout_port *iop);
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int unregister_inout(struct inout_port *iop);
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void init_bvmcons(void);
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#endif /* _INOUT_H_ */
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