[denali] Get Ahci device address from yellowstone.

sys/denali/denali.cpp

@@ -11,18 +11,28 @@
 
 uint64_t main(uint64_t init_port_cap) {
   check(ParseInitPort(init_port_cap));
-  AhciDriver driver;
-  RET_ERR(driver.Init());
-
   glcr::UniquePtr<EndpointClient> yellowstone =
       EndpointClient::AdoptEndpoint(gInitEndpointCap);
+  YellowstoneGetReq ahci_req{
+      .type = kYellowstoneGetAhci,
+  };
+  auto resp_or =
+      yellowstone->CallEndpoint<YellowstoneGetReq, YellowstoneGetAhciResp>(
+          ahci_req);
+  if (!resp_or.ok()) {
+    check(resp_or.error());
+  }
+
+  uint64_t ahci_addr = resp_or.value().ahci_phys_offset;
+  AhciDriver driver(ahci_addr);
+  RET_ERR(driver.Init());
+
   YellowstoneGetReq req{
       .type = kYellowstoneGetRegistration,
   };
   auto resp_cap_or =
-      yellowstone
-          ->CallEndpoint<YellowstoneGetReq, YellowstoneGetRegistrationResp>(
-              req);
+      yellowstone->CallEndpointGetCap<YellowstoneGetReq,
+                                      YellowstoneGetRegistrationResp>(req);
   if (!resp_cap_or.ok()) {
     dbgln("Bad call");
     check(resp_cap_or.error());