/boot/loader.conf に
boot_verbose=1

を入れて、リブートしてみました。 @ tiger2509

Table 'FACP' at 0x7fff0200
Table 'APIC' at 0x7fff0390
MADT: Found table at 0x7fff0390
MP Configuration Table version 1.4 found at 0xc00f8d50
APIC: Using the MADT enumerator.
MADT: Found CPU APIC ID 0 ACPI ID 1: enabled
SMP: Added CPU 0 (AP)
MADT: Found CPU APIC ID 1 ACPI ID 2: enabled
SMP: Added CPU 1 (AP)
MADT: Found CPU APIC ID 130 ACPI ID 3: disabled
MADT: Found CPU APIC ID 131 ACPI ID 4: disabled
ACPI APIC Table: <A M I OEMAPIC >
APIC ID: physical 0, logical 0:0
APIC ID: physical 1, logical 0:1
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
cpu0 (BSP): APIC ID: 0
cpu1 (AP): APIC ID: 1
bios32: Found BIOS32 Service Directory header at 0xc00f0000
bios32: Entry = 0xf0010 (c00f0010) Rev = 0 Len = 1
pcibios: PCI BIOS entry at 0xf0000+0x31
pnpbios: Found PnP BIOS data at 0xc00f3130
pnpbios: Entry = f0000:3e8a Rev = 1.0
Other BIOS signatures found:
APIC: CPU 0 has ACPI ID 1
APIC: CPU 1 has ACPI ID 2
MADT: Found IO APIC ID 2, Interrupt 0 at 0xfec00000