[yellowstone] Add yellowstone server for endpoint registration.

sys/denali/CMakeLists.txt

@@ -15,6 +15,7 @@ target_link_libraries(denali
   cxx
   glacier
   mammoth_lib
+  yellowstonestub
   )
 
 set_target_properties(denali PROPERTIES

sys/denali/denali.cpp

@@ -2,7 +2,9 @@
 #include <mammoth/debug.h>
 #include <mammoth/endpoint_server.h>
 #include <mammoth/init.h>
+#include <mammoth/port.h>
 #include <stdint.h>
+#include <yellowstone.h>
 
 #include "ahci/ahci_driver.h"
 #include "denali_server.h"
@@ -12,7 +14,24 @@ uint64_t main(uint64_t init_port_cap) {
   AhciDriver driver;
   RET_ERR(driver.Init());
 
-  EndpointServer endpoint = EndpointServer::Adopt(gInitEndpointCap);
+  EndpointClient yellowstone = EndpointClient::AdoptEndpoint(gInitEndpointCap);
+  YellowstoneGetReq req{
+      .type = kYellowstoneGetRegistration,
+  };
+  auto resp_cap_or =
+      yellowstone
+          .CallEndpoint<YellowstoneGetReq, YellowstoneGetRegistrationResp>(req);
+  if (!resp_cap_or.ok()) {
+    dbgln("Bad call");
+    check(resp_cap_or.error());
+  }
+  auto resp_cap = resp_cap_or.value();
+  Port notify(resp_cap.second());
+
+  ASSIGN_OR_RETURN(EndpointServer endpoint, EndpointServer::Create());
+  ASSIGN_OR_RETURN(EndpointClient client, endpoint.CreateClient());
+  notify.WriteMessage("denali", client.GetCap());
+
   DenaliServer server(endpoint, driver);
   RET_ERR(server.RunServer());
   // FIXME: Add thread join.