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ecp5: Adding DCCA insertion function

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Signed-off-by: David Shah <davey1576@gmail.com>
This commit is contained in:
David Shah 2018-08-07 12:16:51 +02:00
parent 97b12fa741
commit dfdaaa6f57
2 changed files with 33 additions and 0 deletions
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4
ecp5/cells.cc
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@ -124,6 +124,10 @@ std::unique_ptr<CellInfo> create_ecp5_cell(Context *ctx, IdString type, std::str
add_port(ctx, new_cell.get(), "C", PORT_IN);
add_port(ctx, new_cell.get(), "D", PORT_IN);
add_port(ctx, new_cell.get(), "Z", PORT_OUT);
} else if (type == ctx->id("DCCA")) {
add_port(ctx, new_cell.get(), "CLKI", PORT_IN);
add_port(ctx, new_cell.get(), "CLKO", PORT_OUT);
add_port(ctx, new_cell.get(), "CE", PORT_IN);
} else {
log_error("unable to create ECP5 cell of type %s", type.c_str(ctx));
}

29
ecp5/globals.cc
View File

@ -21,6 +21,7 @@
#include <iomanip>
#include <queue>
#include "nextpnr.h"
#include "cells.h"
#include "log.h"
@ -230,6 +231,34 @@ class Ecp5GlobalRouter
}
}
// Insert a DCC into a net to promote it to a global
NetInfo *insert_dcc(NetInfo *net)
{
auto dcc = create_ecp5_cell(ctx, ctx->id("DCCA"), "$gbuf$" + net->name.str(ctx));
std::unique_ptr<NetInfo> glbnet = std::unique_ptr<NetInfo>(new NetInfo);
glbnet->name = ctx->id("$glbnet$" + net->name.str(ctx));
glbnet->driver.cell = dcc.get();
glbnet->driver.port = ctx->id("CLKO");
for (auto user : net->users) {
user.cell->ports.at(user.port).net = glbnet.get();
}
net->users.clear();
dcc->ports[ctx->id("CLKI")].net = net;
PortRef clki_pr;
clki_pr.port = ctx->id("CLKI");
clki_pr.cell = dcc.get();
net->users.push_back(clki_pr);
ctx->cells[dcc->name] = std::move(dcc);
NetInfo *glbptr = glbnet.get();
ctx->nets[glbnet->name] = std::move(glbnet);
return glbptr;
}
Context *ctx;
};