* hp300 only has one segment.
* mvme68k only has one segment.
mvme68k_init(){#if defined(MACHINE_NEW_NONCONTIG)	extern vm_offset_t avail_start, avail_end;	/*	 * Tell the VM system about available physical memory.  The	 * hp300 only has one segment.	 */#if defined(UVM)	uvm_page_physload(atop(avail_start), atop(avail_end),							atop(avail_start), atop(avail_end));#else	vm_page_physload(atop(avail_start), atop(avail_end),						  atop(avail_start), atop(avail_end));#endif /* UVM */#endif /* MACHINE_NEW_NONCONTIG */	/* 	 * Put machine specific exception vectors in place.	 */	initvectors();	/* startup fake console driver.  It will be replaced by consinit() */	cn_tab = &bootcons;}