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config PPC64
bool "64-bit kernel"
default n
help
This option selects whether a 32-bit or a 64-bit kernel
will be built.
menu "Processor support"
choice
prompt "Processor Type"
depends on PPC32
default 6xx
help
There are five families of 32 bit PowerPC chips supported.
The most common ones are the desktop and server CPUs (601, 603,
604, 740, 750, 74xx) CPUs from Freescale and IBM, with their
embedded 512x/52xx/82xx/83xx/86xx counterparts.
The other embeeded parts, namely 4xx, 8xx, e200 (55xx) and e500
(85xx) each form a family of their own that is not compatible
with the others.
If unsure, select 52xx/6xx/7xx/74xx/82xx/83xx/86xx.
config 6xx
bool "512x/52xx/6xx/7xx/74xx/82xx/83xx/86xx"
select PPC_FPU
config PPC_85xx
bool "Freescale 85xx"
select E500
select FSL_SOC
select WANT_DEVICE_TREE
select MPC85xx
config PPC_8xx
bool "Freescale 8xx"
select FSL_SOC
select 8xx
select WANT_DEVICE_TREE
select PPC_LIB_RHEAP
config 40x
bool "AMCC 40x"
select PPC_DCR_NATIVE
select WANT_DEVICE_TREE
select PPC_UDBG_16550
config 44x
bool "AMCC 44x"
select PPC_DCR_NATIVE
select WANT_DEVICE_TREE
select PPC_UDBG_16550
config E200
bool "Freescale e200"
endchoice
config POWER4_ONLY
bool "Optimize for POWER4"
depends on PPC64
default n
---help---
Cause the compiler to optimize for POWER4/POWER5/PPC970 processors.
The resulting binary will not work on POWER3 or RS64 processors
when compiled with binutils 2.15 or later.
config POWER3
bool
depends on PPC64
default y if !POWER4_ONLY
config POWER4
depends on PPC64
def_bool y
config TUNE_CELL
bool "Optimize for Cell Broadband Engine"
depends on PPC64
help
Cause the compiler to optimize for the PPE of the Cell Broadband
Engine. This will make the code run considerably faster on Cell
but somewhat slower on other machines. This option only changes
the scheduling of instructions, not the selection of instructions
itself, so the resulting kernel will keep running on all other
machines. When building a kernel that is supposed to run only
on Cell, you should also select the POWER4_ONLY option.
config 6xx
bool
# this is temp to handle compat with arch=ppc
config 8xx
bool
config E500
select FSL_EMB_PERFMON
bool
config PPC_FPU
bool
default y if PPC64
config 4xx
bool
depends on 40x || 44x
default y
config BOOKE
bool
depends on E200 || E500 || 44x
default y
config FSL_BOOKE
bool
depends on E200 || E500
default y
config FSL_EMB_PERFMON
bool
config PTE_64BIT
bool
depends on 44x || E500
default y if 44x
default y if E500 && PHYS_64BIT
config PHYS_64BIT
bool 'Large physical address support' if E500
depends on 44x || E500
select RESOURCES_64BIT
default y if 44x
---help---
This option enables kernel support for larger than 32-bit physical
addresses. This features is not be available on all e500 cores.
If in doubt, say N here.
config ALTIVEC
bool "AltiVec Support"
depends on CLASSIC32 || POWER4
---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 E200 || E500
default y
---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 useful if you have a processor that supports
SPE (e500, otherwise known as 85xx series), but does not have any
effect on a non-spe cpu (it does, however add code to the kernel).
If in doubt, say Y here.
config PPC_STD_MMU
bool
depends on 6xx || POWER3 || POWER4 || PPC64
default y
config PPC_STD_MMU_32
def_bool y
depends on PPC_STD_MMU && PPC32
config PPC_MM_SLICES
bool
default y if HUGETLB_PAGE
default n
config VIRT_CPU_ACCOUNTING
bool "Deterministic task and CPU time accounting"
depends on PPC64
default y
help
Select this option to enable more accurate task and CPU time
accounting. This is done by reading a CPU counter on each
kernel entry and exit and on transitions within the kernel
between system, softirq and hardirq state, so there is a
small performance impact. This also enables accounting of
stolen time on logically-partitioned systems running on
IBM POWER5-based machines.
If in doubt, say Y here.
config SMP
depends on PPC_STD_MMU
bool "Symmetric multi-processing support"
---help---
This enables support for systems with more than one CPU. If you have
a system with only one CPU, say N. If you have a system with more
than one CPU, say Y. Note that the kernel does not currently
support SMP machines with 603/603e/603ev or PPC750 ("G3") processors
since they have inadequate hardware support for multiprocessor
operation.
If you say N here, the kernel will run on single and multiprocessor
machines, but will use only one CPU of a multiprocessor machine. If
you say Y here, the kernel will run on single-processor machines.
On a single-processor machine, the kernel will run faster if you say
N here.
If you don't know what to do here, say N.
config NR_CPUS
int "Maximum number of CPUs (2-128)"
range 2 128
depends on SMP
default "32" if PPC64
default "4"
config NOT_COHERENT_CACHE
bool
depends on 4xx || 8xx || E200 || PPC_MPC512x
default y
config CHECK_CACHE_COHERENCY
bool
endmenu
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