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/*
* yosys -- Yosys Open SYnthesis Suite
*
* Copyright (C) 2012 Clifford Wolf <clifford@clifford.at>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#include "kernel/register.h"
#include "kernel/log.h"
#include <sstream>
#include <algorithm>
#include <stdlib.h>
#include <assert.h>
static void handle_memory(RTLIL::Module *module, RTLIL::Cell *memory)
{
log("Creating $memrd and $memwr for memory `%s' in module `%s':\n",
memory->name.c_str(), module->name.c_str());
RTLIL::IdString mem_name = RTLIL::escape_id(memory->parameters.at("\\MEMID").decode_string());
if (module->memories.count(mem_name) != 0)
log_error("Already found a memory object with the ID %s.\n", mem_name.c_str());
RTLIL::Memory *mem = new RTLIL::Memory;
mem->name = mem_name;
mem->width = memory->parameters.at("\\WIDTH").as_int();
mem->start_offset = memory->parameters.at("\\OFFSET").as_int();
mem->size = memory->parameters.at("\\SIZE").as_int();
module->memories[mem_name] = mem;
int abits = memory->parameters.at("\\ABITS").as_int();
int num_rd_ports = memory->parameters.at("\\RD_PORTS").as_int();
int num_wr_ports = memory->parameters.at("\\WR_PORTS").as_int();
for (int i = 0; i < num_rd_ports; i++)
{
RTLIL::Cell *cell = new RTLIL::Cell;
cell->name = NEW_ID;
cell->type = "$memrd";
cell->parameters["\\MEMID"] = mem_name;
cell->parameters["\\ABITS"] = memory->parameters.at("\\ABITS");
cell->parameters["\\WIDTH"] = memory->parameters.at("\\WIDTH");
cell->parameters["\\CLK_ENABLE"] = RTLIL::SigSpec(memory->parameters.at("\\RD_CLK_ENABLE")).extract(i, 1).as_const();
cell->parameters["\\CLK_POLARITY"] = RTLIL::SigSpec(memory->parameters.at("\\RD_CLK_POLARITY")).extract(i, 1).as_const();
cell->connections["\\CLK"] = memory->connections.at("\\RD_CLK").extract(i, 1);
cell->connections["\\ADDR"] = memory->connections.at("\\RD_ADDR").extract(i*abits, abits);
cell->connections["\\DATA"] = memory->connections.at("\\RD_DATA").extract(i*mem->width, mem->width);
module->add(cell);
}
for (int i = 0; i < num_wr_ports; i++)
{
RTLIL::Cell *cell = new RTLIL::Cell;
cell->name = NEW_ID;
cell->type = "$memwr";
cell->parameters["\\MEMID"] = mem_name;
cell->parameters["\\ABITS"] = memory->parameters.at("\\ABITS");
cell->parameters["\\WIDTH"] = memory->parameters.at("\\WIDTH");
cell->parameters["\\CLK_ENABLE"] = RTLIL::SigSpec(memory->parameters.at("\\WR_CLK_ENABLE")).extract(i, 1).as_const();
cell->parameters["\\CLK_POLARITY"] = RTLIL::SigSpec(memory->parameters.at("\\WR_CLK_POLARITY")).extract(i, 1).as_const();
cell->parameters["\\PRIORITY"] = i;
cell->connections["\\CLK"] = memory->connections.at("\\WR_CLK").extract(i, 1);
cell->connections["\\EN"] = memory->connections.at("\\WR_EN").extract(i, 1);
cell->connections["\\ADDR"] = memory->connections.at("\\WR_ADDR").extract(i*abits, abits);
cell->connections["\\DATA"] = memory->connections.at("\\WR_DATA").extract(i*mem->width, mem->width);
module->add(cell);
}
module->cells.erase(memory->name);
delete memory;
}
static void handle_module(RTLIL::Design *design, RTLIL::Module *module)
{
std::vector<RTLIL::IdString> memcells;
for (auto &cell_it : module->cells)
if (cell_it.second->type == "$mem" && design->selected(module, cell_it.second))
memcells.push_back(cell_it.first);
for (auto &it : memcells)
handle_memory(module, module->cells.at(it));
}
struct MemoryUnpackPass : public Pass {
MemoryUnpackPass() : Pass("memory_unpack", "unpack multi-port memory cells") { }
virtual void help()
{
// |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
log("\n");
log(" memory_unpack [selection]\n");
log("\n");
log("This pass converts the multi-port $mem memory cells into individual $memrd and\n");
log("$memwr cells. It is the counterpart to the memory_collect pass.\n");
log("\n");
}
virtual void execute(std::vector<std::string> args, RTLIL::Design *design) {
log_header("Executing MEMORY_UNPACK pass (generating $memrd/$memwr cells form $mem cells).\n");
extra_args(args, 1, design);
for (auto &mod_it : design->modules)
if (design->selected(mod_it.second))
handle_module(design, mod_it.second);
}
} MemoryUnpackPass;
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