acpi_rsdp
rsdp = acpi_rsdp();
rsdp = acpi_rsdp();
vm_offset_t acpi_rsdp(void);
(uintmax_t)sc->acpi_rsdp);
sc->acpi_rsdp = rsdp->rsdp_pointer;
SC_OFF(acpi_rsdp), CB_GUARD_FLAG_SET, SC_OFF(has_acpi_rsdp),
uint64_t acpi_rsdp;
if (kenv(KENV_GET, acpi_rsdp, buf, 20) > 0)
static char acpi_rsdp[] = "acpi.rsdp";