Start adding infrastructure for reading bitstream

YosysHQ · Dec 18, 2024 · de2d551 · de2d551
1 parent 7f98c33
commit de2d551
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Showing 3 changed files with 20 additions and 0 deletions.
diff --git a/himbaechel/uarch/gatemate/bitstream.cc b/himbaechel/uarch/gatemate/bitstream.cc
@@ -148,4 +148,12 @@ void GateMateImpl::write_bitstream(const std::string &device, const std::string
     be.write_bitstream();
 }
 
+bool GateMateImpl::read_bitstream(const std::string &device, const std::string &filename)
+{
+    std::ifstream in(filename);
+    if (!in)
+        log_error("failed to open file %s for reading (%s)\n", filename.c_str(), strerror(errno));
+    return false;
+}
+
 NEXTPNR_NAMESPACE_END
diff --git a/himbaechel/uarch/gatemate/gatemate.cc b/himbaechel/uarch/gatemate/gatemate.cc
@@ -56,6 +56,15 @@ void GateMateImpl::postRoute()
     }
 }
 
+void GateMateImpl::setupArchContext()
+{
+    const ArchArgs &args = ctx->args;
+    if (args.options.count("read")) {
+        if (!read_bitstream(args.device, args.options.at("read")))
+            log_error("Loading bitstream failed.\n");
+    }
+}
+
 struct GateMateArch : HimbaechelArch
 {
     GateMateArch() : HimbaechelArch("gatemate") {};

diff --git a/himbaechel/uarch/gatemate/gatemate.h b/himbaechel/uarch/gatemate/gatemate.h
@@ -36,6 +36,7 @@ struct GateMateImpl : HimbaechelAPI
     void init_database(Arch *arch) override;
 
     void init(Context *ctx) override;
+    void setupArchContext() override;
 
     void pack() override;
 
@@ -46,6 +47,8 @@ struct GateMateImpl : HimbaechelAPI
     void drawBel(std::vector<GraphicElement> &g, GraphicElement::style_t style, IdString bel_type, Loc loc) override;
 
     void write_bitstream(const std::string &device, const std::string &filename);
+    bool read_bitstream(const std::string &device, const std::string &filename);
+
     void parse_ccf(const std::string &filename);
 };