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/*
* emu68 - 68000 IO manager
*
* Copyright (C) 2001-2011 Benjamin Gerard
*
* <benjihan -4t- users.sourceforge -d0t- net>
*
* Time-stamp: <2011-08-23 02:49:53 ben>
*
* This program is free software: you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program.
* If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "ioplug68.h"
#include "mem68.h"
static void do_io_unplug(emu68_t * const emu68, io68_t * const io)
{
/* Remove memory acces handler */
emu68_mem_reset_area(emu68, (io->addr_lo>>8)&255);
}
/* Unplug all IO */
static void _ioplug_unplug_all(emu68_t * const emu68, const int destroy)
{
io68_t *next = emu68->iohead;
while (next) {
io68_t *io = next;
next = io->next;
do_io_unplug(emu68, io);
if (destroy && io->destroy) {
io->destroy(io);
}
}
emu68->iohead = 0;
emu68->nio = 0;
}
/* Unplug all IO */
void emu68_ioplug_unplug_all(emu68_t * const emu68)
{
if (emu68)
_ioplug_unplug_all(emu68, 0);
}
/* Unplug and destroy all IO */
void emu68_ioplug_destroy_all(emu68_t * const emu68)
{
if (emu68)
_ioplug_unplug_all(emu68, 1);
}
/* Unplug an IO :
* - remove from IO-list
* - remove memory access handler
*
* return 0 if IO successfully unplugged
*/
int emu68_ioplug_unplug(emu68_t * const emu68, io68_t *this_io)
{
io68_t *io,**pio;
if (emu68) {
if (!this_io) {
return 0;
}
for (io = emu68->iohead, pio = &emu68->iohead;
io;
pio=&io->next, io=io->next) {
/* Find it ??? */
if (io==this_io) {
*pio = io->next;
--emu68->nio;
do_io_unplug(emu68, io);
return 0;
}
}
}
return -1;
}
/* Plug new IO :
* - add to io list
* - add new memory access handler
*/
void emu68_ioplug(emu68_t * const emu68, io68_t * const io)
{
if (emu68 && io) {
int i;
io->next = emu68->iohead;
emu68->iohead = io;
io->emu68 = emu68;
++emu68->nio;
for (i=(u8)(io->addr_lo>>8); i<=(u8)(io->addr_hi>>8); ++i) {
emu68->mapped_io[i] = io;
}
}
}