mirrors/yosys
3
0
Fork 0
mirror of https://github.com/YosysHQ/yosys synced 2025-04-25 10:05:33 +00:00
Code Activity

json: Add support for memories.

Browse source 
Previously, memories were silently discarded by the JSON backend, making
round-tripping modules with them crash.

Since there are already some users using JSON to implement custom
external passes that use memories (and infer width/size from memory
ports), let's fix this by just making JSON backend and frontend support
memories as first-class objects.

Processes are still not supported, and will now cause a hard error.

Fixes #1908.
This commit is contained in:
Marcelina Kościelnicka 2021-03-09 20:42:14 +01:00
parent a55bf6375b
commit 3d9698153f
2 changed files with 88 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

46
frontends/json/jsonparse.cc
View file

@ -539,6 +539,52 @@ void json_import(Design *design, string &modname, JsonNode *node)
json_parse_attr_param(cell->parameters, cell_node->data_dict.at("parameters"));
}
}
if (node->data_dict.count("memories"))
{
JsonNode *memories_node = node->data_dict.at("memories");
if (memories_node->type != 'D')
log_error("JSON memories node is not a dictionary.\n");
for (auto &memory_node_it : memories_node->data_dict)
{
IdString memory_name = RTLIL::escape_id(memory_node_it.first.c_str());
JsonNode *memory_node = memory_node_it.second;
RTLIL::Memory *mem = new RTLIL::Memory;
mem->name = memory_name;
if (memory_node->type != 'D')
log_error("JSON memory node '%s' is not a dictionary.\n", log_id(memory_name));
if (memory_node->data_dict.count("width") == 0)
log_error("JSON memory node '%s' has no width attribute.\n", log_id(memory_name));
JsonNode *width_node = memory_node->data_dict.at("width");
if (width_node->type != 'N')
log_error("JSON memory node '%s' has a non-number width.\n", log_id(memory_name));
mem->width = width_node->data_number;
if (memory_node->data_dict.count("size") == 0)
log_error("JSON memory node '%s' has no size attribute.\n", log_id(memory_name));
JsonNode *size_node = memory_node->data_dict.at("size");
if (size_node->type != 'N')
log_error("JSON memory node '%s' has a non-number size.\n", log_id(memory_name));
mem->size = size_node->data_number;
mem->start_offset = 0;
if (memory_node->data_dict.count("start_offset") != 0) {
JsonNode *val = memory_node->data_dict.at("start_offset");
if (val->type == 'N')
mem->start_offset = val->data_number;
}
if (memory_node->data_dict.count("attributes"))
json_parse_attr_param(mem->attributes, memory_node->data_dict.at("attributes"));
module->memories[mem->name] = mem;
}
}
}
struct JsonFrontend : public Frontend {