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Merge pull request #85 from YosysHQ/issue84

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ice40: Add error for bad PACKAGE_PIN connections
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David Shah 2018-10-03 12:34:43 +01:00 committed by GitHub
commit e3466bce1a
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1 changed files with 13 additions and 2 deletions
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15
ice40/pack.cc
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@ -391,6 +391,8 @@ static bool is_nextpnr_iob(Context *ctx, CellInfo *cell)
static void pack_io(Context *ctx)
{
std::unordered_set<IdString> packed_cells;
std::unordered_set<IdString> delete_nets;
std::vector<std::unique_ptr<CellInfo>> new_cells;
log_info("Packing IOs..\n");
@ -410,14 +412,20 @@ static void pack_io(Context *ctx)
log_info("%s feeds SB_IO %s, removing %s %s.\n", ci->name.c_str(ctx), sb->name.c_str(ctx),
ci->type.c_str(ctx), ci->name.c_str(ctx));
NetInfo *net = sb->ports.at(ctx->id("PACKAGE_PIN")).net;
if (((ci->type == ctx->id("$nextpnr_ibuf") || ci->type == ctx->id("$nextpnr_iobuf")) &&
net->users.size() > 1) ||
(ci->type == ctx->id("$nextpnr_obuf") && (net->users.size() > 2 || net->driver.cell != nullptr)))
log_error("PACKAGE_PIN of SB_IO '%s' connected to more than a single top level IO.\n",
sb->name.c_str(ctx));
if (net != nullptr) {
ctx->nets.erase(net->name);
delete_nets.insert(net->name);
sb->ports.at(ctx->id("PACKAGE_PIN")).net = nullptr;
}
if (ci->type == ctx->id("$nextpnr_iobuf")) {
NetInfo *net2 = ci->ports.at(ctx->id("I")).net;
if (net2 != nullptr) {
ctx->nets.erase(net2->name);
delete_nets.insert(net2->name);
}
}
} else {
@ -435,6 +443,9 @@ static void pack_io(Context *ctx)
for (auto pcell : packed_cells) {
ctx->cells.erase(pcell);
}
for (auto dnet : delete_nets) {
ctx->nets.erase(dnet);
}
for (auto &ncell : new_cells) {
ctx->cells[ncell->name] = std::move(ncell);
}