diff options
Diffstat (limited to 'arch/xtensa/Kconfig')
| -rw-r--r-- | arch/xtensa/Kconfig | 166 |
1 files changed, 78 insertions, 88 deletions
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig index 98120083043..cf2501b5afd 100644 --- a/arch/xtensa/Kconfig +++ b/arch/xtensa/Kconfig @@ -4,16 +4,13 @@ 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 @@ -24,28 +21,22 @@ config XTENSA 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 @@ -57,6 +48,9 @@ config HZ source "init/Kconfig" source "kernel/Kconfig.freezer" +config MMU + def_bool n + menu "Processor type and features" choice @@ -65,38 +59,36 @@ 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" @@ -105,6 +97,32 @@ config 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 @@ -113,11 +131,16 @@ 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. @@ -125,21 +148,14 @@ config XTENSA_PLATFORM_XT2000 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 @@ -156,52 +172,27 @@ config CMDLINE 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" @@ -213,9 +204,8 @@ menu "Executable file formats" # 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 @@ -240,7 +230,7 @@ source "fs/Kconfig" 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 |