# define MAX_CPUS 1
#endif
+#if USE_PAE
+# define PHYS_BITS 48
+#else
+# define PHYS_BITS 32
+#endif
+
// === MACROS ===
#define LOCK(lockptr) do {int v=1;\
while(v)__asm__ __volatile__("lock xchgl %%eax, (%%edi)":"=a"(v):"a"(1),"D"(lockptr));}while(0)