Kconfig

# For a description of the syntax of this configuration file,
# see Documentation/kbuild/kconfig-language.txt.
#

mainmenu "Linux/PowerPC Kernel Configuration"

config MMU
	bool
	default y

config UID16
	bool

config GENERIC_HARDIRQS
	bool
	default y

config RWSEM_GENERIC_SPINLOCK
	bool

config RWSEM_XCHGADD_ALGORITHM
	bool
	default y

config GENERIC_CALIBRATE_DELAY
	bool
	default y

config HAVE_DEC_LOCK
	bool
	default y

config PPC
	bool
	default y

config PPC32
	bool
	default y

# All PPCs use generic nvram driver through ppc_md
config GENERIC_NVRAM
	bool
	default y

source "init/Kconfig"

menu "Processor"

choice
	prompt "Processor Type"
	default 6xx

config 6xx
	bool "6xx/7xx/74xx/52xx/82xx/83xx"
	help
	  There are four types of PowerPC chips supported.  The more common
	  types (601, 603, 604, 740, 750, 7400), the Motorola embedded
	  versions (821, 823, 850, 855, 860, 52xx, 82xx, 83xx), the IBM embedded
	  versions (403 and 405) and the high end 64 bit Power processors
	  (POWER 3, POWER4, and IBM 970 also known as G5)
	  Unless you are building a kernel for one of the embedded processor
	  systems, 64 bit IBM RS/6000 or an Apple G5, choose 6xx.
	  Note that the kernel runs in 32-bit mode even on 64-bit chips.
	  Also note that because the 52xx, 82xx, & 83xx family has a 603e core,
	  specific support for that chipset is asked later on.

config 40x
	bool "40x"

config 44x
	bool "44x"

config POWER3
	bool "POWER3"

config POWER4
	bool "POWER4 and 970 (G5)"

config 8xx
	depends on BROKEN
	bool "8xx"

config E500
	bool "e500"

endchoice

config BOOKE
	bool
	depends on E500
	default y

config FSL_BOOKE
	bool
	depends on E500
	default y

config PTE_64BIT
	bool
	depends on 44x
	default y

config PHYS_64BIT
	bool
	depends on 44x
	default y

config ALTIVEC
	bool "AltiVec Support"
	depends on 6xx || POWER4
	depends on !8260 && !83xx
	---help---
	  This option enables kernel support for the Altivec extensions to the
	  PowerPC processor. The kernel currently supports saving and restoring
	  altivec registers, and turning on the 'altivec enable' bit so user
	  processes can execute altivec instructions.

	  This option is only usefully if you have a processor that supports
	  altivec (G4, otherwise known as 74xx series), but does not have
	  any affect on a non-altivec cpu (it does, however add code to the
	  kernel).

	  If in doubt, say Y here.

config SPE
	bool "SPE Support"
	depends on E500
	---help---
	  This option enables kernel support for the Signal Processing
	  Extensions (SPE) to the PowerPC processor. The kernel currently
	  supports saving and restoring SPE registers, and turning on the
	  'spe enable' bit so user processes can execute SPE instructions.

	  This option is only usefully if you have a processor that supports
	  SPE (e500, otherwise known as 85xx series), but does not have any
	  affect on a non-spe cpu (it does, however add code to the kernel).

	  If in doubt, say Y here.

config TAU
	bool "Thermal Management Support"
	depends on 6xx && !8260 && !83xx
	help
	  G3 and G4 processors have an on-chip temperature sensor called the
	  'Thermal Assist Unit (TAU)', which, in theory, can measure the on-die
	  temperature within 2-4 degrees Celsius. This option shows the current
	  on-die temperature in /proc/cpuinfo if the cpu supports it.

	  Unfortunately, on some chip revisions, this sensor is very inaccurate
	  and in some cases, does not work at all, so don't assume the cpu
	  temp is actually what /proc/cpuinfo says it is.

config TAU_INT
	bool "Interrupt driven TAU driver (DANGEROUS)"
	depends on TAU
	---help---
	  The TAU supports an interrupt driven mode which causes an interrupt
	  whenever the temperature goes out of range. This is the fastest way
	  to get notified the temp has exceeded a range. With this option off,
	  a timer is used to re-check the temperature periodically.

	  However, on some cpus it appears that the TAU interrupt hardware
	  is buggy and can cause a situation which would lead unexplained hard
	  lockups.

	  Unless you are extending the TAU driver, or enjoy kernel/hardware
	  debugging, leave this option off.

config TAU_AVERAGE
	bool "Average high and low temp"
	depends on TAU
	---help---
	  The TAU hardware can compare the temperature to an upper and lower
	  bound.  The default behavior is to show both the upper and lower
	  bound in /proc/cpuinfo. If the range is large, the temperature is
	  either changing a lot, or the TAU hardware is broken (likely on some
	  G4's). If the range is small (around 4 degrees), the temperature is
	  relatively stable.  If you say Y here, a single temperature value,
	  halfway between the upper and lower bounds, will be reported in
	  /proc/cpuinfo.

	  If in doubt, say N here.

config MATH_EMULATION
	bool "Math emulation"
	depends on 4xx || 8xx || E500
	---help---
	  Some PowerPC chips designed for embedded applications do not have
	  a floating-point unit and therefore do not implement the
	  floating-point instructions in the PowerPC instruction set.  If you
	  say Y here, the kernel will include code to emulate a floating-point
	  unit, which will allow programs that use floating-point
	  instructions to run.

	  If you have an Apple machine or an IBM RS/6000 or pSeries machine,
	  or any machine with a 6xx, 7xx or 7xxx series processor, say N
	  here.  Saying Y here will not hurt performance (on any machine) but
	  will increase the size of the kernel.