Function uma_startup1

freebsd/vm/uma_core.c:2886–2959

* Initialize the kernel memory allocator. This is done after pages can be * allocated but before general KVA is available. */

 * allocated but before general KVA is available.
 */
void
uma_startup1(vm_offset_t virtual_avail)
{
	struct uma_zctor_args args;
	size_t ksize, zsize, size;
	uma_keg_t primarykeg;
	uintptr_t m;
	int domain;
	uint8_t pflag;

	bootstart = bootmem = virtual_avail;

	rw_init(&uma_rwlock, "UMA lock");
	sx_init(&uma_reclaim_lock, "umareclaim");

	ksize = sizeof(struct uma_keg) +
	    (sizeof(struct uma_domain) * vm_ndomains);
	ksize = roundup(ksize, UMA_SUPER_ALIGN);
	zsize = sizeof(struct uma_zone) +
	    (sizeof(struct uma_cache) * (mp_maxid + 1)) +
	    (sizeof(struct uma_zone_domain) * vm_ndomains);
	zsize = roundup(zsize, UMA_SUPER_ALIGN);

	/* Allocate the zone of zones, zone of kegs, and zone of zones keg. */
	size = (zsize * 2) + ksize;
	for (domain = 0; domain < vm_ndomains; domain++) {
		m = (uintptr_t)startup_alloc(NULL, size, domain, &pflag,
		    M_NOWAIT | M_ZERO);
		if (m != 0)
			break;
	}
	zones = (uma_zone_t)m;
	m += zsize;
	kegs = (uma_zone_t)m;
	m += zsize;
	primarykeg = (uma_keg_t)m;

	/* "manually" create the initial zone */
	memset(&args, 0, sizeof(args));
	args.name = "UMA Kegs";
	args.size = ksize;
	args.ctor = keg_ctor;
	args.dtor = keg_dtor;
	args.uminit = zero_init;
	args.fini = NULL;
	args.keg = primarykeg;
	args.align = UMA_SUPER_ALIGN - 1;
	args.flags = UMA_ZFLAG_INTERNAL;
	zone_ctor(kegs, zsize, &args, M_WAITOK);

	args.name = "UMA Zones";
	args.size = zsize;
	args.ctor = zone_ctor;
	args.dtor = zone_dtor;
	args.uminit = zero_init;
	args.fini = NULL;
	args.keg = NULL;
	args.align = UMA_SUPER_ALIGN - 1;