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ecp5: Helper function and arch tweaks for global router

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Signed-off-by: David Shah <davey1576@gmail.com>
This commit is contained in:
David Shah 2018-07-26 13:05:15 +02:00
parent f1aa7093fe
commit 30f122854a
3 changed files with 81 additions and 0 deletions
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6
ecp5/arch.cc
View File

@ -579,4 +579,10 @@ std::vector<std::pair<std::string, std::string>> Arch::getTilesAtLocation(int ro
return ret;
}
GlobalInfoPOD Arch::globalInfoAtLoc(Location loc)
{
int locidx = loc.y * chip_info->width + loc.x;
return chip_info->location_glbinfo[locidx];
}
NEXTPNR_NAMESPACE_END

23
ecp5/arch.h
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@ -640,6 +640,21 @@ struct Arch : BaseCtx
return range;
}
IdString getWireBasename(WireId wire) const { return id(locInfo(wire)->wire_data[wire.index].name.get()); }
WireId getWireByLocAndBasename(Location loc, std::string basename) const
{
WireId wireId;
wireId.location = loc;
for (int i = 0; i < locInfo(wireId)->num_wires; i++) {
if (locInfo(wireId)->wire_data[i].name.get() == basename) {
wireId.index = i;
return wireId;
}
}
return WireId();
}
// -------------------------------------------------
PipId getPipByName(IdString name) const;
@ -891,6 +906,14 @@ struct Arch : BaseCtx
}
NPNR_ASSERT_FALSE_STR("no tile at (" + std::to_string(col) + ", " + std::to_string(row) + ") with type in set");
}
GlobalInfoPOD globalInfoAtLoc(Location loc);
IdString id_trellis_slice;
IdString id_clk, id_lsr;
IdString id_clkmux, id_lsrmux;
IdString id_srmode, id_mode;
};
NEXTPNR_NAMESPACE_END

52
ecp5/globals.cc Normal file
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@ -0,0 +1,52 @@
/*
* nextpnr -- Next Generation Place and Route
*
* Copyright (C) 2018 David Shah <david@symbioticeda.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 "nextpnr.h"
NEXTPNR_NAMESPACE_BEGIN
class Ecp5GlobalRouter
{
public:
Ecp5GlobalRouter(Context *ctx) : ctx(ctx){};
PipId find_tap_pip(WireId tile_glb)
{
std::string wireName = ctx->getWireBasename(tile_glb).str(ctx);
std::string glbName = wireName.substr(2);
TapDirection td = ctx->globalInfoAtLoc(tile_glb.location).tap_dir;
WireId tap_wire;
Location tap_loc;
tap_loc.x = ctx->globalInfoAtLoc(tile_glb.location).tap_col;
tap_loc.y = tile_glb.location.y;
if (td == TAP_DIR_LEFT) {
tap_wire = ctx->getWireByLocAndBasename(tap_loc, "L_" + glbName);
} else {
tap_wire = ctx->getWireByLocAndBasename(tap_loc, "R_" + glbName);
}
return *(ctx->getPipsUphill(tap_wire).begin());
}
private:
Context *ctx;
};
void route_ecp5_globals(Context *ctx);
NEXTPNR_NAMESPACE_END