How linux-ia64 boots

BOOT PROCESSOR
==============

_start()
setup base registers and a few other important things
	start_kernel()
		setup_arch()
			compute vhpt size
			paging_init()
			vmem_map
			discontig memory
		cpu_init()
		ia64_mmu_init()
			allocate LVHPT if cpu == 0
	init()
		smp_init()
		foreach offline cpu
			cpu_up
				__cpu_up
					do_boot_cpu
						alloc_vhpt() (for new cpu)
						send IPI wakeup
						wait for checkin or 10 seconds
		end


APPLICATION PROCESSOR
=====================

(sleeping from SAL until interrupt)
_start()
setup base registers and a few other important things
	start_secondary()
		cpu_init()
		ia64_mmu_init()
			setup PTA register, size of vhpt etc
		smp_callin()