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/*
* yosys -- Yosys Open SYnthesis Suite
*
* Copyright (C) 2023 N. Engelhardt <nak@yosyshq.com>
*
* 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/log.h"
#include "kernel/register.h"
#include "kernel/rtlil.h"
#include "kernel/sigtools.h"
USING_YOSYS_NAMESPACE
PRIVATE_NAMESPACE_BEGIN
// ============================================================================
struct QlBramTypesPass : public Pass {
QlBramTypesPass() : Pass("ql_bram_types", "Change TDP36K type to subtypes") {}
void help() override
{
// |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
log("\n");
log(" ql_bram_types [selection]\n");
log("\n");
log(" This pass changes the type of TDP36K cells to different types based on the\n");
log(" configuration of the cell.\n");
log("\n");
}
int width_for_mode(int mode){
// 1: mode = 3'b101;
// 2: mode = 3'b110;
// 4: mode = 3'b100;
// 8,9: mode = 3'b001;
// 16, 18: mode = 3'b010;
// 32, 36: mode = 3'b011;
switch (mode)
{
case 1:
return 9;
case 2:
return 18;
case 3:
return 36;
case 4:
return 4;
case 5:
return 1;
case 6:
return 2;
default:
log_error("Invalid mode: %x", mode);
}
}
void execute(std::vector<std::string> args, RTLIL::Design *design) override
{
log_header(design, "Executing QL_BRAM_TYPES pass.\n");
size_t argidx = 1;
extra_args(args, argidx, design);
for (RTLIL::Module* module : design->selected_modules())
for (RTLIL::Cell* cell: module->selected_cells())
{
if (cell->type != ID(TDP36K) || !cell->hasParam(ID(MODE_BITS)))
continue;
RTLIL::Const mode_bits = cell->getParam(ID(MODE_BITS));
bool split = mode_bits.extract(80).as_bool();
bool FMODE1_i = mode_bits.extract(13).as_bool();
bool FMODE2_i = mode_bits.extract(54).as_bool();
if (FMODE1_i != FMODE2_i) {
log_debug("Can't change type of mixed use TDP36K block: FMODE1_i = %s, FMODE2_i = %s\n", FMODE1_i ? "true" : "false", FMODE2_i ? "true" : "false");
continue;
}
bool is_fifo = FMODE1_i;
bool SYNC_FIFO1_i = mode_bits.extract(0).as_bool();
bool SYNC_FIFO2_i = mode_bits.extract(41).as_bool();
if (SYNC_FIFO1_i != SYNC_FIFO2_i) {
log_debug("Can't change type of mixed use TDP36K block: SYNC_FIFO1_i = %s, SYNC_FIFO2_i = %s\n", SYNC_FIFO1_i ? "true" : "false", SYNC_FIFO2_i ? "true" : "false");
continue;
}
bool sync_fifo = SYNC_FIFO1_i;
int RMODE_A1_i = mode_bits.extract(1, 3).as_int();
int RMODE_B1_i = mode_bits.extract(4, 3).as_int();
int WMODE_A1_i = mode_bits.extract(7, 3).as_int();
int WMODE_B1_i = mode_bits.extract(10, 3).as_int();
int RMODE_A2_i = mode_bits.extract(42, 3).as_int();
int RMODE_B2_i = mode_bits.extract(45, 3).as_int();
int WMODE_A2_i = mode_bits.extract(48, 3).as_int();
int WMODE_B2_i = mode_bits.extract(51, 3).as_int();
// TODO: should these be a warning or an error?
if (RMODE_A1_i != WMODE_A1_i) {
log_warning("Can't change type of misconfigured TDP36K block: Port A1 configured with read width = %d different from write width = %d\n", width_for_mode(RMODE_A1_i), width_for_mode(WMODE_A1_i));
continue;
}
if (RMODE_B1_i != WMODE_B1_i) {
log_warning("Can't change type of misconfigured TDP36K block: Port B1 configured with read width = %d different from write width = %d\n", width_for_mode(RMODE_B1_i), width_for_mode(WMODE_B1_i));
continue;
}
if (RMODE_A2_i != WMODE_A2_i) {
log_warning("Can't change type of misconfigured TDP36K block: Port A2 configured with read width = %d different from write width = %d\n", width_for_mode(RMODE_A2_i), width_for_mode(WMODE_A2_i));
continue;
}
if (RMODE_B2_i != WMODE_B2_i) {
log_warning("Can't change type of misconfigured TDP36K block: Port B2 configured with read width = %d different from write width = %d\n", width_for_mode(RMODE_B2_i), width_for_mode(WMODE_B2_i));
continue;
}
// TODO: For nonsplit blocks, should RMODE_A1_i == RMODE_A2_i etc be checked/enforced?
std::string type = "TDP36K";
if (is_fifo) {
type += "_FIFO_";
if (sync_fifo)
type += "SYNC_";
else
type += "ASYNC_";
} else
type += "_BRAM_";
if (split) {
type += stringf("A1_X%d_", width_for_mode(RMODE_A1_i));
type += stringf("B1_X%d_", width_for_mode(RMODE_B1_i));
type += stringf("A2_X%d_", width_for_mode(RMODE_A2_i));
type += stringf("B2_X%d_", width_for_mode(RMODE_B2_i));
type += "split";
} else {
type += stringf("A_X%d_", width_for_mode(RMODE_A1_i));
type += stringf("B_X%d_", width_for_mode(RMODE_B1_i));
type += "nonsplit";
}
cell->type = RTLIL::escape_id(type);
log_debug("Changed type of memory cell %s to %s\n", log_id(cell->name), log_id(cell->type));
}
}
} QlBramMergePass;
PRIVATE_NAMESPACE_END
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