Hi, attached patch introduces a "processor type" menu similar to ppc32. It _should_ not change anything upto now.
The aim is to allow future fine graded cpu optimizations via mcpu/mtune compiler flags and also to clean up the arch Makefile/Kconfig.cputypes (I know this is a minefield). Greetings Marvin
diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype index f7efaa9..eebde6c 100644 --- a/arch/powerpc/platforms/Kconfig.cputype +++ b/arch/powerpc/platforms/Kconfig.cputype @@ -54,35 +54,65 @@ config E200 endchoice -config POWER4_ONLY - bool "Optimize for POWER4" +choice + prompt "Processor Type" depends on PPC64 + default TUNE_POWER4 + help + There are serveral families of 64 bit PowerPC chips supported. + These include the Power3 to Power6 series, 970, and Cell BE based + CPUs made be IBM. + + If unsure, select Power4. + +config TUNE_POWER3 + bool "Power3" + +config TUNE_POWER4 + bool "Power4" + +config TUNE_970 + bool "970/G5" + +config TUNE_POWER5 + bool "Power5" + +config TUNE_POWER6 + bool "Power6" + +config TUNE_CELL + bool "Cell Broadband Engine" + 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. If the resulting kernel is + built to run only on Cell BE machines, select also OPT_EXCLUSIVE. + +endchoice + +config OPT_EXCLUSIVE + bool "Optimize to run exclusive on selected CPU" 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. + help + Cause the compiler to optimize to run exclusive on the selected + CPU. The resulting binary will probably not work on other CPUs. + + If the compiler/binutils combination does not support the exclusive + optimization, it will try to tune only or fail. + + If you are unsure, select no. config POWER3 - bool depends on PPC64 - default y if !POWER4_ONLY + def_bool y if !POWER4_ONLY config POWER4 depends on PPC64 def_bool y -config TUNE_CELL - bool "Optimize for Cell Broadband Engine" +config POWER4_ONLY 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. + def_bool y if TUNE_POWER4 && OPT_EXCLUSIVE config 6xx bool
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