Function physmem_init_kernel_globals

freebsd/kern/subr_physmem.c:400–416

* Process all the regions added earlier into the global avail lists. * * Updates the kernel global 'physmem' with the number of physical pages * available for use (all pages not in any exclusion region). * * Updates the kernel global 'Maxmem' with the page number one greater then the * last page of physical memory in the system. */

 * last page of physical memory in the system.
 */
void
physmem_init_kernel_globals(void)
{
	size_t nextidx;
	u_long hwphyssz;

	hwphyssz = 0;
	TUNABLE_ULONG_FETCH("hw.physmem", &hwphyssz);

	regions_to_avail(dump_avail, EXFLAG_NODUMP, PHYS_AVAIL_ENTRIES,
	    hwphyssz, NULL, NULL);
	nextidx = regions_to_avail(phys_avail, EXFLAG_NOALLOC,
	    PHYS_AVAIL_ENTRIES, hwphyssz, &physmem, &realmem);
	if (nextidx == 0)
		panic("No memory entries in phys_avail");
	Maxmem = atop(phys_avail[nextidx - 1]);
}

#ifdef DDB
#include <ddb/ddb.h>