167 lines
4.7 KiB
C++
167 lines
4.7 KiB
C++
#ifndef __vvm_vvm_signal_H
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#define __vvm_vvm_signal_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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#if !defined(WINNT) && !defined(macintosh)
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#ident "$Id: vvm_signal.h,v 1.12 2001/01/16 02:44:18 steve Exp $"
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#endif
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# include "vvm.h"
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# include "vvm_nexus.h"
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/*
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* The vvm_bitset_t is a reference to an array of vpip_bit_t
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* values. The space for the value is actually managed elsewhere, this
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* object just references it, and attaches operations to it.
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*
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* The vvm_bitset_t is useful in behavioral situations, to operate on
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* vpip_bit_t data vectors.
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*/
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class vvm_bitset_t {
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public:
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explicit vvm_bitset_t(vpip_bit_t*b, unsigned nb);
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~vvm_bitset_t();
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vpip_bit_t operator[] (unsigned idx) const;
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vpip_bit_t&operator[] (unsigned idx);
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unsigned get_width() const { return nbits; }
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vpip_bit_t get_bit(unsigned idx) const;
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unsigned as_unsigned() const;
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public:
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vpip_bit_t*bits;
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unsigned nbits;
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private: // not implemented
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vvm_bitset_t(const vvm_bitset_t&);
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vvm_bitset_t& operator= (const vvm_bitset_t&);
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};
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/*
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* The vvm_signal_t template is the real object that handles the
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* receiving of assignments and doing whatever is done. It also
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* connects VPI to the C++/vvm design. The actual bits are referenced
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* by the base vpiSignal structure.
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*/
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class vvm_signal_t : public __vpiSignal, public vvm_nexus::recvr_t {
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public:
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vvm_signal_t();
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~vvm_signal_t();
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void init_P(unsigned idx, vpip_bit_t val);
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void take_value(unsigned key, vpip_bit_t val);
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private: // not implemented
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vvm_signal_t(const vvm_signal_t&);
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vvm_signal_t& operator= (const vvm_signal_t&);
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};
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struct vvm_ram_callback {
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vvm_ram_callback();
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virtual ~vvm_ram_callback();
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virtual void handle_write(unsigned idx) =0;
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vvm_ram_callback*next_;
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};
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class vvm_memory_t : public __vpiMemory {
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public:
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vvm_memory_t();
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void set_word(unsigned addr, const vvm_bitset_t&val);
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void set_word(unsigned addr, const vpip_bit_t*val);
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void get_word(unsigned addr, vvm_bitset_t&val) const;
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void set_callback(vvm_ram_callback*ram);
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class assign_nb : public vvm_event {
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public:
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assign_nb(vvm_memory_t&m, unsigned i, const vvm_bitset_t&v);
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~assign_nb();
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void event_function();
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private:
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vvm_memory_t&mem_;
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unsigned index_;
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vpip_bit_t*bits_;
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vvm_bitset_t val_;
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};
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private:
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vvm_ram_callback*cb_list_;
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void call_list_(unsigned idx);
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};
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/*
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* $Log: vvm_signal.h,v $
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* Revision 1.12 2001/01/16 02:44:18 steve
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* Use the iosfwd header if available.
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*
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* Revision 1.11 2000/12/15 20:05:16 steve
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* Fix memory access in vvm. (PR#70)
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*
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* Revision 1.10 2000/12/12 03:30:25 steve
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* out-line vvm_bitset_t methods.
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*
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* Revision 1.9 2000/04/26 18:35:12 steve
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* Handle assigning small values to big registers.
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*
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* Revision 1.8 2000/03/26 16:55:41 steve
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* Remove the vvm_bits_t abstract class.
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*
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* Revision 1.7 2000/03/26 16:28:31 steve
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* vvm_bitset_t is no longer a template.
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*
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* Revision 1.6 2000/03/25 05:02:25 steve
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* signal bits are referenced at run time by the vpiSignal struct.
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*
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* Revision 1.5 2000/03/25 02:43:57 steve
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* Remove all remain vvm_bitset_t return values,
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* and disallow vvm_bitset_t copying.
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*
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* Revision 1.4 2000/03/24 02:43:37 steve
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* vvm_unop and vvm_binop pass result by reference
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* instead of returning a value.
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*
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* Revision 1.3 2000/03/22 04:26:41 steve
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* Replace the vpip_bit_t with a typedef and
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* define values for all the different bit
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* values, including strengths.
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*
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* Revision 1.2 2000/03/17 20:21:14 steve
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* Detemplatize the vvm_signal_t class.
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*
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* Revision 1.1 2000/03/16 19:03:04 steve
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* Revise the VVM backend to use nexus objects so that
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* drivers and resolution functions can be used, and
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* the t-vvm module doesn't need to write a zillion
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* output functions.
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*
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*/
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#endif
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