diff options
Diffstat (limited to 'frontend')
| -rw-r--r-- | frontend/frontend_base.h (renamed from frontend/generic.h) | 92 |
1 files changed, 91 insertions, 1 deletions
diff --git a/frontend/generic.h b/frontend/frontend_base.h index 35428052..8b76cc85 100644 --- a/frontend/generic.h +++ b/frontend/frontend_base.h @@ -99,4 +99,94 @@ * int get_vector_bit_signal(const BitVectorDataType &bits, int i); * returns the signal number of vector bit <i> * - */
\ No newline at end of file + */ + +#include "log.h" +#include "nextpnr.h" +NEXTPNR_NAMESPACE_BEGIN + +namespace { + +template <typename FrontendType> struct GenericFrontend +{ + GenericFrontend(Context *ctx, const FrontendType &impl) : ctx(ctx), impl(impl) {} + Context *ctx; + const FrontendType &impl; + using mod_dat_t = typename FrontendType::ModuleDataType; + using mod_port_dat_t = typename FrontendType::ModulePortDataType; + using cell_dat_t = typename FrontendType::CellDataType; + using netname_dat_t = typename FrontendType::NetnameDataType; + using bitvector_t = typename FrontendType::BitVectorDataType; + + // Used for hierarchy resolution + struct ModuleInfo + { + mod_dat_t *mod_data; + bool is_top = false, is_blackbox = false, is_whitebox = false; + inline bool is_box() const { return is_blackbox || is_whitebox; } + std::unordered_set<IdString> instantiated_celltypes; + }; + std::unordered_map<IdString, ModuleInfo> mods; + IdString top; + + // Process the list of modules and determine + // the top module + void find_top_module() + { + impl.foreach_module([&](const std::string &name, const mod_dat_t &mod) { + IdString mod_id = ctx->id(name); + auto &mi = mods[mod_id]; + mi.mod_data = &mod; + impl.foreach_attr(mod, [&](const std::string &name, const Property &value) { + if (name == "top") + mi.is_top = (value.intval != 0); + else if (name == "blackbox") + mi.is_blackbox = (value.intval != 0); + else if (name == "whitebox") + mi.is_whitebox = (value.intval != 0); + }); + impl.foreach_cell(mod, [&](const std::string &name, const cell_dat_t &cell) { + mi.instantiated_cells.insert(ctx->id(impl.get_cell_type(cell))); + }); + }); + // First of all, see if a top module has been manually specified + if (ctx->settings.count(ctx->id("frontend/top"))) { + IdString user_top = ctx->id(ctx->settings.at(ctx->id("frontend/top")).as_string()); + if (!mods.count(user_top)) + log_error("Top module '%s' not found!\n", ctx->nameOf(user_top)); + top = user_top; + return; + } + // If not, look for a module with the top attribute set + IdString top_by_attr; + for (auto &mod : mods) { + if (mod.second.is_top && !mod.second.is_box()) { + if (top_by_attr != IdString()) + log_error("Found multiple modules with (* top *) set (including %s and %s).\n", + ctx->nameOf(top_by_attr), ctx->nameOf(mod.first)); + top_by_attr = mod.first; + } + } + if (top_by_attr != IdString()) { + top = top_by_attr; + return; + } + // Finally, attempt to autodetect the top module using hierarchy + // (a module that is not a box and is not used as a cell by any other module) + std::unordered_set<IdString> candidate_top; + for (auto &mod : mods) + if (!mod.second.is_box()) + candidate_top.insert(mod.first); + for (auto &mod : mods) + for (auto &c : mod.second.instantiated_celltypes) + candidate_top.erase(c); + if (candidate_top.size() != 1) + log_error("Failed to autodetect top module, please specify using --top.\n"); + top = *(candidate_top.begin()); + } +}; +} // namespace + +template <typename FrontendType> void run_frontend(Context *ctx, const FrontendType &impl) {} + +NEXTPNR_NAMESPACE_END
\ No newline at end of file |