236 lines
5.9 KiB
Plaintext
236 lines
5.9 KiB
Plaintext
config PPC64
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bool "64-bit kernel"
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default n
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help
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This option selects whether a 32-bit or a 64-bit kernel
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will be built.
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menu "Processor support"
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choice
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prompt "Processor Type"
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depends on PPC32
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default 6xx
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help
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There are five families of 32 bit PowerPC chips supported.
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The most common ones are the desktop and server CPUs (601, 603,
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604, 740, 750, 74xx) CPUs from Freescale and IBM, with their
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embedded 512x/52xx/82xx/83xx/86xx counterparts.
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The other embeeded parts, namely 4xx, 8xx, e200 (55xx) and e500
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(85xx) each form a family of their own that is not compatible
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with the others.
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If unsure, select 52xx/6xx/7xx/74xx/82xx/83xx/86xx.
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config 6xx
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bool "512x/52xx/6xx/7xx/74xx/82xx/83xx/86xx"
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select PPC_FPU
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config PPC_85xx
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bool "Freescale 85xx"
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select E500
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select FSL_SOC
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select MPC85xx
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config PPC_8xx
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bool "Freescale 8xx"
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select FSL_SOC
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select 8xx
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select PPC_LIB_RHEAP
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config 40x
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bool "AMCC 40x"
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select PPC_DCR_NATIVE
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select PPC_UDBG_16550
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config 44x
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bool "AMCC 44x"
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select PPC_DCR_NATIVE
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select PPC_UDBG_16550
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config E200
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bool "Freescale e200"
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endchoice
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config POWER4_ONLY
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bool "Optimize for POWER4"
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depends on PPC64
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default n
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---help---
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Cause the compiler to optimize for POWER4/POWER5/PPC970 processors.
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The resulting binary will not work on POWER3 or RS64 processors
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when compiled with binutils 2.15 or later.
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config POWER3
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bool
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depends on PPC64
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default y if !POWER4_ONLY
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config POWER4
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depends on PPC64
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def_bool y
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config TUNE_CELL
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bool "Optimize for Cell Broadband Engine"
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depends on PPC64
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help
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Cause the compiler to optimize for the PPE of the Cell Broadband
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Engine. This will make the code run considerably faster on Cell
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but somewhat slower on other machines. This option only changes
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the scheduling of instructions, not the selection of instructions
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itself, so the resulting kernel will keep running on all other
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machines. When building a kernel that is supposed to run only
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on Cell, you should also select the POWER4_ONLY option.
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config 6xx
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bool
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# this is temp to handle compat with arch=ppc
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config 8xx
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bool
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config E500
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select FSL_EMB_PERFMON
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bool
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config PPC_FPU
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bool
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default y if PPC64
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config 4xx
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bool
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depends on 40x || 44x
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default y
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config BOOKE
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bool
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depends on E200 || E500 || 44x
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default y
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config FSL_BOOKE
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bool
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depends on E200 || E500
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default y
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config FSL_EMB_PERFMON
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bool "Freescale Embedded Perfmon"
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depends on E500 || PPC_83xx
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help
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This is the Performance Monitor support found on the e500 core
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and some e300 cores (c3 and c4). Select this only if your
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core supports the Embedded Performance Monitor APU
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config PTE_64BIT
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bool
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depends on 44x || E500
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default y if 44x
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default y if E500 && PHYS_64BIT
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config PHYS_64BIT
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bool 'Large physical address support' if E500
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depends on 44x || E500
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select RESOURCES_64BIT
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default y if 44x
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---help---
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This option enables kernel support for larger than 32-bit physical
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addresses. This features is not be available on all e500 cores.
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If in doubt, say N here.
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config ALTIVEC
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bool "AltiVec Support"
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depends on CLASSIC32 || POWER4
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---help---
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This option enables kernel support for the Altivec extensions to the
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PowerPC processor. The kernel currently supports saving and restoring
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altivec registers, and turning on the 'altivec enable' bit so user
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processes can execute altivec instructions.
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This option is only usefully if you have a processor that supports
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altivec (G4, otherwise known as 74xx series), but does not have
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any affect on a non-altivec cpu (it does, however add code to the
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kernel).
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If in doubt, say Y here.
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config SPE
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bool "SPE Support"
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depends on E200 || E500
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default y
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---help---
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This option enables kernel support for the Signal Processing
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Extensions (SPE) to the PowerPC processor. The kernel currently
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supports saving and restoring SPE registers, and turning on the
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'spe enable' bit so user processes can execute SPE instructions.
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This option is only useful if you have a processor that supports
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SPE (e500, otherwise known as 85xx series), but does not have any
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effect on a non-spe cpu (it does, however add code to the kernel).
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If in doubt, say Y here.
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config PPC_STD_MMU
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bool
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depends on 6xx || POWER3 || POWER4 || PPC64
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default y
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config PPC_STD_MMU_32
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def_bool y
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depends on PPC_STD_MMU && PPC32
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config PPC_MM_SLICES
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bool
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default y if HUGETLB_PAGE
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default n
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config VIRT_CPU_ACCOUNTING
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bool "Deterministic task and CPU time accounting"
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depends on PPC64
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default y
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help
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Select this option to enable more accurate task and CPU time
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accounting. This is done by reading a CPU counter on each
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kernel entry and exit and on transitions within the kernel
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between system, softirq and hardirq state, so there is a
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small performance impact. This also enables accounting of
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stolen time on logically-partitioned systems running on
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IBM POWER5-based machines.
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If in doubt, say Y here.
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config SMP
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depends on PPC_STD_MMU
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bool "Symmetric multi-processing support"
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---help---
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This enables support for systems with more than one CPU. If you have
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a system with only one CPU, say N. If you have a system with more
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than one CPU, say Y. Note that the kernel does not currently
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support SMP machines with 603/603e/603ev or PPC750 ("G3") processors
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since they have inadequate hardware support for multiprocessor
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operation.
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If you say N here, the kernel will run on single and multiprocessor
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machines, but will use only one CPU of a multiprocessor machine. If
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you say Y here, the kernel will run on single-processor machines.
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On a single-processor machine, the kernel will run faster if you say
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N here.
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If you don't know what to do here, say N.
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config NR_CPUS
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int "Maximum number of CPUs (2-128)"
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range 2 128
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depends on SMP
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default "32" if PPC64
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default "4"
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config NOT_COHERENT_CACHE
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bool
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depends on 4xx || 8xx || E200 || PPC_MPC512x
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default y
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config CHECK_CACHE_COHERENCY
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bool
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endmenu
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