Index: sys/arm/arm/machdep.c
===================================================================
--- sys/arm/arm/machdep.c
+++ sys/arm/arm/machdep.c
@@ -618,7 +618,7 @@
 	 */
 	physmem_exclude_region(abp->abp_physaddr,
 		pmap_preboot_get_pages(0) - abp->abp_physaddr, EXFLAG_NOALLOC);
-	physmem_init_kernel_globals();
+	physmem_init_kernel_globals(NULL, NULL);
 
 	init_param2(physmem);
 	/* Init message buffer. */
Index: sys/arm64/arm64/machdep.c
===================================================================
--- sys/arm64/arm64/machdep.c
+++ sys/arm64/arm64/machdep.c
@@ -796,7 +796,7 @@
 	/* Exclude entries neexed in teh DMAP region, but not phys_avail */
 	if (efihdr != NULL)
 		exclude_efi_map_entries(efihdr);
-	physmem_init_kernel_globals();
+	physmem_init_kernel_globals(NULL, NULL);
 
 	devmap_bootstrap(0, NULL);
 
Index: sys/kern/subr_physmem.c
===================================================================
--- sys/kern/subr_physmem.c
+++ sys/kern/subr_physmem.c
@@ -478,7 +478,7 @@
  * last page of physical memory in the system.
  */
 void
-physmem_init_kernel_globals(void)
+physmem_init_kernel_globals(size_t *pa_idx, size_t *da_idx)
 {
 	size_t nextidx;
 	u_long hwphyssz;
@@ -486,12 +486,16 @@
 	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(dump_avail, EXFLAG_NODUMP,
+	    PHYS_AVAIL_ENTRIES, hwphyssz, NULL, NULL);
+	if (da_idx != NULL)
+		*da_idx = nextidx;
 	nextidx = regions_to_avail(phys_avail, EXFLAG_NOALLOC,
 	    PHYS_AVAIL_ENTRIES, hwphyssz, &physmem, &realmem);
 	if (nextidx == 0)
 		panic("No memory entries in phys_avail");
+	if (pa_idx != NULL)
+		*pa_idx = nextidx;
 	Maxmem = atop(phys_avail[nextidx - 1]);
 }
 
Index: sys/riscv/riscv/machdep.c
===================================================================
--- sys/riscv/riscv/machdep.c
+++ sys/riscv/riscv/machdep.c
@@ -566,7 +566,7 @@
 		    EXFLAG_NODUMP | EXFLAG_NOALLOC);
 	}
 #endif
-	physmem_init_kernel_globals();
+	physmem_init_kernel_globals(NULL, NULL);
 
 	/* Establish static device mappings */
 	devmap_bootstrap(0, NULL);
Index: sys/sys/physmem.h
===================================================================
--- sys/sys/physmem.h
+++ sys/sys/physmem.h
@@ -52,7 +52,7 @@
 void physmem_hardware_region(uint64_t pa, uint64_t sz);
 void physmem_exclude_region(vm_paddr_t pa, vm_size_t sz, uint32_t flags);
 size_t physmem_avail(vm_paddr_t *avail, size_t maxavail);
-void physmem_init_kernel_globals(void);
+void physmem_init_kernel_globals(size_t *pa_idx, size_t *da_idx);
 void physmem_print_tables(void);
 
 /*