fusee_cpp: implement cpu startup

libraries/libexosphere/source/hw/hw_cache.arch.arm64.cpp

@@ -26,4 +26,15 @@ namespace ams::hw::arch::arm64 {
         }
     }
 
+
+
+    void InvalidateDataCache(const void *ptr, size_t size) {
+        const uintptr_t start = reinterpret_cast<uintptr_t>(ptr);
+        const uintptr_t end   = util::AlignUp(start + size, hw::DataCacheLineSize);
+
+        for (uintptr_t cur = start; cur < end; cur += hw::DataCacheLineSize) {
+            InvalidateDataCacheLine(reinterpret_cast<void *>(cur));
+        }
+    }
+
 }