sysmodules: introduce "luma shared config", rewrite ndmu workaround

sysmodules/sm/source/notifications.c

@@ -8,8 +8,9 @@ This is part of 3ds_sm, which is licensed under the MIT license (see LICENSE for
 #include "notifications.h"
 #include "processes.h"
 
-// 0 by default
-#define ROSALINA_PREVENT_DISCONNECT          (*(volatile bool*)0x1FF81108)
+#include <stdatomic.h>
+
+static atomic_int ndmuWorkaroundCount;
 
 static bool isNotificationInhibited(const ProcessData *processData, u32 notificationId)
 {
@@ -19,7 +20,7 @@ static bool isNotificationInhibited(const ProcessData *processData, u32 notifica
         // Shell opened, shell closed
         case 0x213:
         case 0x214:
-            return pid == ndmuServicePid && ROSALINA_PREVENT_DISCONNECT;
+            return pid == ndmuServicePid && atomic_load(&ndmuWorkaroundCount) > 0;
         default:
             return false;
     }
@@ -206,3 +207,10 @@ Result PublishToAll(u32 notificationId)
 
     return 0;
 }
+
+Result AddToNdmuWorkaroundCount(s32 count)
+{
+    // Note: no check is made to (current value)+count
+    atomic_fetch_add(&ndmuWorkaroundCount, count);
+    return 0;
+}

sysmodules/sm/source/notifications.h

@@ -17,3 +17,5 @@ Result PublishToSubscriber(u32 notificationId, u32 flags);
 Result PublishAndGetSubscriber(u32 *pidCount, u32 *pidList, u32 notificationId, u32 flags);
 Result PublishToProcess(Handle process, u32 notificationId);
 Result PublishToAll(u32 notificationId);
+
+Result AddToNdmuWorkaroundCount(s32 count);

sysmodules/sm/source/srv.c

@@ -167,6 +167,14 @@ Result srvHandleCommands(SessionData *sessionData)
             break;
         }
 
+        case 0x1000: // Custom command: AddToNdmuWorkaroundCount
+        {
+            res = AddToNdmuWorkaroundCount((s32)cmdbuf[1]);
+            cmdbuf[0] = IPC_MakeHeader(0x1000, 1, 0);;
+            cmdbuf[1] = (u32)res;
+            break;
+        }
+
         default:
             goto invalid_command;
             break;