caiyu/nextpnr
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ice40: Add helper to know which global network is driven by a SB_GB Bel

Browse Source 
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
This commit is contained in:
Sylvain Munaut 2018-11-26 11:03:26 +01:00
parent 822b525035
commit a79f0db749
2 changed files with 8 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
ice40/arch.h
View File

@ -884,6 +884,13 @@ struct Arch : BaseCtx
}
NPNR_ASSERT_FALSE("Expected PLL pin to share an output with an SB_IO D_IN_{0,1}");
}
int getDrivenGlobalNetwork(BelId bel) const
{
NPNR_ASSERT(getBelType(bel) == id_SB_GB);
IdString glb_net = getWireName(getBelPinWire(bel, id_GLOBAL_BUFFER_OUTPUT));
return std::stoi(std::string("") + glb_net.str(this).back());
}
};
void ice40DelayFuzzerMain(Context *ctx);

3
ice40/arch_place.cc
View File

@ -165,8 +165,7 @@ bool Arch::isValidBelForCell(CellInfo *cell, BelId bel) const
return true;
NPNR_ASSERT(cell->ports.at(id_GLOBAL_BUFFER_OUTPUT).net != nullptr);
const NetInfo *net = cell->ports.at(id_GLOBAL_BUFFER_OUTPUT).net;
IdString glb_net = getWireName(getBelPinWire(bel, id_GLOBAL_BUFFER_OUTPUT));
int glb_id = std::stoi(std::string("") + glb_net.str(this).back());
int glb_id = getDrivenGlobalNetwork(bel);
if (net->is_reset && net->is_enable)
return false;
else if (net->is_reset)