131 lines
3.8 KiB
C
131 lines
3.8 KiB
C
#ifndef __priv_H
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#define __priv_H
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/*
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* Copyright (c) 2000 Stephen Williams (steve@icarus.com)
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*
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* This source code is free software; you can redistribute it
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* and/or modify it in source code form under the terms of the GNU
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* General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CVS_IDENT
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#ident "$Id: priv.h,v 1.8 2007/02/26 19:49:50 steve Exp $"
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#endif
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# include <ivl_target.h>
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# include <ipal.h>
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extern pal_t pal;
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extern unsigned error_count;
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/*
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* A device has an array of pins, that are bound to the netlist either
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* by attribute or by random lookup. The bind_pin table keeps track of
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* pin allocations.
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*
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* Each cell also has attached to it an expression that calculates
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* results from an input. That expression is represented by a sum of
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* product terms. A product term is an array of term_t objects,
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* terminated by a term will a null nex pointers. A sum, then, is an
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* array of pointers to term_t arrays, terminated by a null pointer.
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*/
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typedef struct term_s {
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int inv;
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ivl_nexus_t nex;
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} term_t;
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/*
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* This structure describes a target device pin. If the pin is not
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* controlled by the pal (i.e. it is a power pin) then the sop field
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* is null. Otherwise, the sop in the macrocell that controls the pin.
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*
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* If the pin has an enable, then the sop for the enable function is
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* stored here as well.
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*
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* This structure for collecting the PAL design assumes that all the
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* macrocells are associated with pins, or are enables for other
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* pins.
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*
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* The bind_pin array is the complete description of the target as it
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* is accumulated.
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*/
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struct pal_bind_s {
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/* This is the netlist connection for the pin. */
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ivl_nexus_t nexus;
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/* If the pin is an output, this is is sop that drives it. */
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pal_sop_t sop;
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/* If the output has an enable, this is it, along with the
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single term that activates it. */
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ivl_net_logic_t enable;
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term_t **enable_ex;
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/* If there is a register here, this is it. */
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ivl_lpm_t reg;
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unsigned reg_q;
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/* The input to the cell is this expression. */
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term_t **sop_ex;
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/* These are the SOP flags that I believe I need. */
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unsigned sop_inv : 1;
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};
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extern unsigned pins;
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extern struct pal_bind_s* bind_pin;
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/*
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* These are various steps in the fitting process.
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*/
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extern int get_pad_bindings(ivl_scope_t net, void*x);
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extern void absorb_pad_enables(void);
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extern int fit_registers(ivl_scope_t scope, void*x);
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extern int fit_logic(void);
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extern int emit_jedec(const char*path);
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/*
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* $Log: priv.h,v $
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* Revision 1.8 2007/02/26 19:49:50 steve
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* Spelling fixes (larry doolittle)
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*
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* Revision 1.7 2002/08/12 01:35:03 steve
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* conditional ident string using autoconfig.
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*
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* Revision 1.6 2001/05/16 03:55:30 steve
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* Update to new LPM API for flip-flops.
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*
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* Revision 1.5 2001/01/15 00:05:39 steve
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* Add client data pointer for scope and process scanners.
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*
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* Revision 1.4 2001/01/09 03:10:48 steve
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* Generate the jedec to configure the macrocells.
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*
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* Revision 1.3 2000/12/14 23:37:47 steve
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* Start support for fitting the logic.
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*
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* Revision 1.2 2000/12/09 03:42:52 steve
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* Stuff registers into macrocells.
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*
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* Revision 1.1 2000/12/09 01:17:38 steve
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* Add the pal loadable target.
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*
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*/
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#endif
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