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diff --git a/stand/kboot/arch/aarch64/load_addr.c b/stand/kboot/arch/aarch64/load_addr.c
--- a/stand/kboot/arch/aarch64/load_addr.c
+++ b/stand/kboot/arch/aarch64/load_addr.c
@@ -0,0 +1,154 @@
+/*-
+ * Copyright (c) 2022 Netflix, Inc
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <sys/param.h>
+#include <sys/efi.h>
+#include <machine/metadata.h>
+#include <sys/linker.h>
+#include <fdt_platform.h>
+#include <libfdt.h>
+
+#include "kboot.h"
+#include "bootstrap.h"
+
+/*
+ * Info from dtb about the EFI system
+ */
+vm_paddr_t efi_systbl_phys;
+struct efi_map_header *efi_map_hdr;
+uint32_t efi_map_size;
+vm_paddr_t efi_map_phys_src; /* From DTB */
+vm_paddr_t efi_map_phys_dst; /* From our memory map metadata module */
+
+static bool
+do_memory_from_fdt(int fd)
+{
+ struct stat sb;
+ char *buf = NULL;
+ int len, offset;
+ uint32_t sz, ver, esz, efisz;
+ uint64_t mmap_pa;
+ const uint32_t *u32p;
+ const uint64_t *u64p;
+ struct efi_map_header *efihdr;
+ struct efi_md *map;
+
+ if (fstat(fd, &sb) < 0)
+ return false;
+ buf = malloc(sb.st_size);
+ if (buf == NULL)
+ return false;
+ len = read(fd, buf, sb.st_size);
+ /* NB: we're reading this from sysfs, so mismatch OK */
+ if (len <= 0)
+ goto errout;
+
+ /*
+ * Look for /chosen to find these values:
+ * linux,uefi-system-table PA of the UEFI System Table.
+ * linux,uefi-mmap-start PA of the UEFI memory map
+ * linux,uefi-mmap-size Size of mmap
+ * linux,uefi-mmap-desc-size Size of each entry of mmap
+ * linux,uefi-mmap-desc-ver Format version, should be 1
+ */
+ offset = fdt_path_offset(buf, "/chosen");
+ if (offset <= 0)
+ goto errout;
+ u64p = fdt_getprop(buf, offset, "linux,uefi-system-table", &len);
+ if (u64p == NULL)
+ goto errout;
+ efi_systbl_phys = fdt64_to_cpu(*u64p);
+ u32p = fdt_getprop(buf, offset, "linux,uefi-mmap-desc-ver", &len);
+ if (u32p == NULL)
+ goto errout;
+ ver = fdt32_to_cpu(*u32p);
+ u32p = fdt_getprop(buf, offset, "linux,uefi-mmap-desc-size", &len);
+ if (u32p == NULL)
+ goto errout;
+ esz = fdt32_to_cpu(*u32p);
+ u32p = fdt_getprop(buf, offset, "linux,uefi-mmap-size", &len);
+ if (u32p == NULL)
+ goto errout;
+ sz = fdt32_to_cpu(*u32p);
+ u64p = fdt_getprop(buf, offset, "linux,uefi-mmap-start", &len);
+ if (u64p == NULL)
+ goto errout;
+ mmap_pa = fdt64_to_cpu(*u64p);
+ free(buf);
+
+ printf("UEFI MMAP: Ver %d Ent Size %d Tot Size %d PA %#lx\n",
+ ver, esz, sz, mmap_pa);
+
+ /*
+ * We have no ability to read the PA that this map is in, so
+ * pass the address to FreeBSD via a rather odd flag entry as
+ * the first map so early boot can copy the memory map into
+ * this space and have the rest of the code cope.
+ */
+ efisz = (sizeof(*efihdr) + 0xf) & ~0xf;
+ buf = malloc(sz + efisz);
+ if (buf == NULL)
+ return false;
+ efihdr = (struct efi_map_header *)buf;
+ map = (struct efi_md *)((uint8_t *)efihdr + efisz);
+ bzero(map, sz);
+ efihdr->memory_size = sz;
+ efihdr->descriptor_size = esz;
+ efihdr->descriptor_version = ver;
+ efi_map_phys_src = mmap_pa;
+ efi_map_hdr = efihdr;
+ efi_map_size = sz + efisz;
+
+ return true;
+errout:
+ free(buf);
+ return false;
+}
+
+bool
+enumerate_memory_arch(void)
+{
+ int fd = -1;
+ bool rv = false;
+
+ fd = open("host:/sys/firmware/fdt", O_RDONLY);
+ if (fd != -1) {
+ rv = do_memory_from_fdt(fd);
+ close(fd);
+ /*
+ * So, we have physaddr to the memory table. However, we can't
+ * open /dev/mem on some platforms to get the actual table. So
+ * we have to fall through to get it from /proc/iomem.
+ */
+ }
+ if (!rv) {
+ printf("Could not obtain UEFI memory tables, expect failure\n");
+ }
+
+ populate_avail_from_iomem();
+
+ print_avail();
+
+ return true;
+}
+
+uint64_t
+kboot_get_phys_load_segment(void)
+{
+#define HOLE_SIZE (64ul << 20)
+#define KERN_ALIGN (2ul << 20)
+ static uint64_t s = 0;
+
+ if (s != 0)
+ return (s);
+
+ s = first_avail(KERN_ALIGN, HOLE_SIZE, SYSTEM_RAM);
+ if (s != 0)
+ return (s);
+ s = 0x40000000 | 0x4200000; /* should never get here */
+ printf("Falling back to crazy address %#lx\n", s);
+ return (s);
+}

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