KernelMain: more precise memory reporting, MmInitializePhysical: support more than ~1.1 GB of memory.

code/shell/shell.c

@@ -37,9 +37,9 @@ int main() {
     // Pass the 32-bit buffer directly to BitBlt
     BitBlt(600, 400, width, height, image);
 
-    for (size_t i = 0; i < 1000000000; i++) {
-        // burn!
-    }
+    // for (size_t i = 0; i < 1000000000; i++) {
+    //     // burn!
+    // }
 
     OutputDebugStringA("Goodbye from the shell!\n");