mainmenu "Linux/Xtensa Kernel Configuration"
config FRAME_POINTER
- bool
- default n
+ def_bool n
config ZONE_DMA
- bool
- default y
+ def_bool y
config XTENSA
- bool
- default y
+ def_bool y
select HAVE_IDE
help
Xtensa processors are 32-bit RISC machines designed by Tensilica
a home page at <http://xtensa.sourceforge.net/>.
config RWSEM_XCHGADD_ALGORITHM
- bool
- default y
+ def_bool y
config GENERIC_FIND_NEXT_BIT
- bool
- default y
+ def_bool y
config GENERIC_HWEIGHT
- bool
- default y
+ def_bool y
config GENERIC_HARDIRQS
- bool
- default y
+ def_bool y
config ARCH_HAS_ILOG2_U32
- bool
- default n
+ def_bool n
config ARCH_HAS_ILOG2_U64
- bool
- default n
+ def_bool n
config NO_IOPORT
def_bool y
source "init/Kconfig"
source "kernel/Kconfig.freezer"
+config MMU
+ def_bool n
+
menu "Processor type and features"
choice
config XTENSA_VARIANT_FSF
bool "fsf - default (not generic) configuration"
+ select MMU
config XTENSA_VARIANT_DC232B
bool "dc232b - Diamond 232L Standard Core Rev.B (LE)"
+ select MMU
help
- This variant refers to Tensilica's Diamond 232L Standard core Rev.B (LE).
+ This variant refers to Tensilica's Diamond 232L Standard core Rev.B (LE).
endchoice
-config MMU
- bool
- default y
-
config XTENSA_UNALIGNED_USER
bool "Unaligned memory access in use space"
- ---help---
- The Xtensa architecture currently does not handle unaligned
- memory accesses in hardware but through an exception handler.
- Per default, unaligned memory accesses are disabled in user space.
+ help
+ The Xtensa architecture currently does not handle unaligned
+ memory accesses in hardware but through an exception handler.
+ Per default, unaligned memory accesses are disabled in user space.
- Say Y here to enable unaligned memory access in user space.
+ Say Y here to enable unaligned memory access in user space.
config PREEMPT
bool "Preemptible Kernel"
- ---help---
- This option reduces the latency of the kernel when reacting to
- real-time or interactive events by allowing a low priority process to
- be preempted even if it is in kernel mode executing a system call.
- Unfortunately the kernel code has some race conditions if both
- CONFIG_SMP and CONFIG_PREEMPT are enabled, so this option is
- currently disabled if you are building an SMP kernel.
+ help
+ This option reduces the latency of the kernel when reacting to
+ real-time or interactive events by allowing a low priority process to
+ be preempted even if it is in kernel mode executing a system call.
+ Unfortunately the kernel code has some race conditions if both
+ CONFIG_SMP and CONFIG_PREEMPT are enabled, so this option is
+ currently disabled if you are building an SMP kernel.
- Say Y here if you are building a kernel for a desktop, embedded
- or real-time system. Say N if you are unsure.
+ Say Y here if you are building a kernel for a desktop, embedded
+ or real-time system. Say N if you are unsure.
config MATH_EMULATION
bool "Math emulation"
endmenu
+config XTENSA_CALIBRATE_CCOUNT
+ def_bool n
+ help
+ On some platforms (XT2000, for example), the CPU clock rate can
+ vary. The frequency can be determined, however, by measuring
+ against a well known, fixed frequency, such as an UART oscillator.
+
+config SERIAL_CONSOLE
+ def_bool n
+
+config XTENSA_ISS_NETWORK
+ def_bool n
+
+menu "Bus options"
+
+config PCI
+ bool "PCI support"
+ default y
+ help
+ Find out whether you have a PCI motherboard. PCI is the name of a
+ bus system, i.e. the way the CPU talks to the other stuff inside
+ your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
+ VESA. If you have PCI, say Y, otherwise N.
+
+source "drivers/pci/Kconfig"
+
menu "Platform options"
choice
config XTENSA_PLATFORM_ISS
bool "ISS"
+ select XTENSA_CALIBRATE_CCOUNT
+ select SERIAL_CONSOLE
+ select XTENSA_ISS_NETWORK
help
ISS is an acronym for Tensilica's Instruction Set Simulator.
config XTENSA_PLATFORM_XT2000
bool "XT2000"
+ select XTENSA_CALIBRATE_CCOUNT
+ select PCI
help
XT2000 is the name of Tensilica's feature-rich emulation platform.
This hardware is capable of running a full Linux distribution.
endchoice
-config XTENSA_CALIBRATE_CCOUNT
- bool "Auto calibration of the CPU clock rate"
- ---help---
- On some platforms (XT2000, for example), the CPU clock rate can
- vary. The frequency can be determined, however, by measuring
- against a well known, fixed frequency, such as an UART oscillator.
-
config XTENSA_CPU_CLOCK
int "CPU clock rate [MHz]"
depends on !XTENSA_CALIBRATE_CCOUNT
- default "16"
+ default 16
config GENERIC_CALIBRATE_DELAY
bool "Auto calibration of the BogoMIPS value"
- ---help---
+ help
The BogoMIPS value can easily be derived from the CPU frequency.
config CMDLINE_BOOL
time by entering them here. As a minimum, you should specify the
memory size and the root device (e.g., mem=64M root=/dev/nfs).
-config SERIAL_CONSOLE
- bool
- depends on XTENSA_PLATFORM_ISS
- default y
-
-config XTENSA_ISS_NETWORK
- bool
- depends on XTENSA_PLATFORM_ISS
- default y
-
source "mm/Kconfig"
endmenu
-menu "Bus options"
-
-config PCI
- bool "PCI support" if !XTENSA_PLATFORM_ISS
- depends on !XTENSA_PLATFORM_ISS
- default y
+config HOTPLUG
+ bool "Support for hot-pluggable devices"
help
- Find out whether you have a PCI motherboard. PCI is the name of a
- bus system, i.e. the way the CPU talks to the other stuff inside
- your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
- VESA. If you have PCI, say Y, otherwise N.
-
-source "drivers/pci/Kconfig"
+ Say Y here if you want to plug devices into your computer while
+ the system is running, and be able to use them quickly. In many
+ cases, the devices can likewise be unplugged at any time too.
-config HOTPLUG
+ One well known example of this is PCMCIA- or PC-cards, credit-card
+ size devices such as network cards, modems or hard drives which are
+ plugged into slots found on all modern laptop computers. Another
+ example, used on modern desktops as well as laptops, is USB.
- bool "Support for hot-pluggable devices"
- ---help---
- Say Y here if you want to plug devices into your computer while
- the system is running, and be able to use them quickly. In many
- cases, the devices can likewise be unplugged at any time too.
-
- One well known example of this is PCMCIA- or PC-cards, credit-card
- size devices such as network cards, modems or hard drives which are
- plugged into slots found on all modern laptop computers. Another
- example, used on modern desktops as well as laptops, is USB.
-
- Enable HOTPLUG and build a modular kernel. Get agent software
- (from <http://linux-hotplug.sourceforge.net/>) and install it.
- Then your kernel will automatically call out to a user mode "policy
- agent" (/sbin/hotplug) to load modules and set up software needed
- to use devices as you hotplug them.
+ Enable HOTPLUG and build a modular kernel. Get agent software
+ (from <http://linux-hotplug.sourceforge.net/>) and install it.
+ Then your kernel will automatically call out to a user mode "policy
+ agent" (/sbin/hotplug) to load modules and set up software needed
+ to use devices as you hotplug them.
source "drivers/pcmcia/Kconfig"
# only elf supported
config KCORE_ELF
- bool
+ def_bool y
depends on PROC_FS
- default y
help
If you enabled support for /proc file system then the file
/proc/kcore will contain the kernel core image in ELF format. This
menu "Xtensa initrd options"
depends on BLK_DEV_INITRD
- config EMBEDDED_RAMDISK
+config EMBEDDED_RAMDISK
bool "Embed root filesystem ramdisk into the kernel"
config EMBEDDED_RAMDISK_IMAGE
projects / platform / adaptation / renesas_rcar / renesas_kernel.git / commitdiff