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/*
* Copyright (c) 2000 Stephen Williams (steve@icarus.com)
*
* This source code is free software; you can redistribute it
* and/or modify it in source code form under the terms of the GNU
* General Public License as published by the Free Software
* Foundation; either version 2 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
# include "config.h"
# include "ivl_target.h"
# include <assert.h>
# include "priv.h"
/*
* Given a pin index, look at the nexus for a bufif device that is
* driving it, if any. Save that device in the enable slot for the
* cell. We'll try to fit it later.
*/
static void absorb_pad_enable(unsigned idx)
{
unsigned ndx;
ivl_nexus_t nex = bind_pin[idx].nexus;
for (ndx = 0 ; ndx < ivl_nexus_ptrs(nex) ; ndx += 1) {
unsigned pin;
ivl_nexus_ptr_t ptr = ivl_nexus_ptr(nex, ndx);
ivl_net_logic_t log = ivl_nexus_ptr_log(ptr);
if (log == 0)
continue;
pin = ivl_nexus_ptr_pin(ptr);
assert(pin == 0);
switch (ivl_logic_type(log)) {
case IVL_LO_BUFIF0:
case IVL_LO_BUFIF1:
assert(bind_pin[idx].enable == 0);
bind_pin[idx].enable = log;
break;
default:
}
}
}
void absorb_pad_enables(void)
{
unsigned idx;
for (idx = 0 ; idx < pins ; idx += 1) {
if (bind_pin[idx].sop == 0)
continue;
if (bind_pin[idx].nexus == 0)
continue;
absorb_pad_enable(idx);
}
}
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