config ARCH_HAS_FAST_MULTIPLIER
bool
+config LIBIO
+ bool "Generic logical IO management"
+ def_bool y if PCI && (ARM || UNICORE32 || MICROBLAZE || ARM64)
+ help
+ For some architectures, there are no IO space. To support the
+ accesses to legacy I/O devices on those architectures, kernel
+ implemented the memory mapped I/O mechanism based on bridge bus
+ supports. But for some buses which do not support MMIO, the
+ peripherals there should be accessed with device-specific way.
+ To abstract those different I/O accesses into unified I/O accessors,
+ this option provide a generic I/O space management way after mapping
+ the device I/O to system logical/fake I/O and help to hide all the
+ hardware detail.
+
config CRC_CCITT
tristate "CRC-CCITT functions"
help