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/*
* plex86: run multiple x86 operating systems concurrently
* Copyright (C) 1999-2001 Kevin P. Lawton
*
* iodev.h: IO devices, typedefs, defines, etc.
*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* Define the IO callback types. */
typedef Bit32u (*ioReadHandler_t)(void *, Bit32u, unsigned);
typedef void (*ioWriteHandler_t)(void *, Bit32u, Bit32u, unsigned);
#define MaxIOHandlers 20 /* Must be within 8 bits. */
#define NoIOHandlerID 0xff /* No handler manages this IO port. */
#define UnmappedIOSeen 0xfe /* Access to this unhandled IO port has
* been seen, tag with this value so we
* only report accesses once.
*/
typedef struct {
Bit8u readHandlerID[64 * 1024];
struct {
void *thisPtr; /* C++ handlers need this. */
ioReadHandler_t callback;
unsigned space;
} read[MaxIOHandlers];
unsigned readHandlerCount;
Bit8u writeHandlerID[64 * 1024];
struct {
void *thisPtr; /* C++ handler need this. */
ioWriteHandler_t callback;
unsigned space;
} write[MaxIOHandlers];
unsigned writeHandlerCount;
} ioHandlers_t;
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