| # Put here option for CPU selection and depending optimization |
| if !X86_ELAN |
| |
| choice |
| prompt "Processor family" |
| default M686 |
| |
| config M386 |
| bool "386" |
| depends on !UML |
| ---help--- |
| This is the processor type of your CPU. This information is used for |
| optimizing purposes. In order to compile a kernel that can run on |
| all x86 CPU types (albeit not optimally fast), you can specify |
| "386" here. |
| |
| The kernel will not necessarily run on earlier architectures than |
| the one you have chosen, e.g. a Pentium optimized kernel will run on |
| a PPro, but not necessarily on a i486. |
| |
| Here are the settings recommended for greatest speed: |
| - "386" for the AMD/Cyrix/Intel 386DX/DXL/SL/SLC/SX, Cyrix/TI |
| 486DLC/DLC2, UMC 486SX-S and NexGen Nx586. Only "386" kernels |
| will run on a 386 class machine. |
| - "486" for the AMD/Cyrix/IBM/Intel 486DX/DX2/DX4 or |
| SL/SLC/SLC2/SLC3/SX/SX2 and UMC U5D or U5S. |
| - "586" for generic Pentium CPUs lacking the TSC |
| (time stamp counter) register. |
| - "Pentium-Classic" for the Intel Pentium. |
| - "Pentium-MMX" for the Intel Pentium MMX. |
| - "Pentium-Pro" for the Intel Pentium Pro. |
| - "Pentium-II" for the Intel Pentium II or pre-Coppermine Celeron. |
| - "Pentium-III" for the Intel Pentium III or Coppermine Celeron. |
| - "Pentium-4" for the Intel Pentium 4 or P4-based Celeron. |
| - "K6" for the AMD K6, K6-II and K6-III (aka K6-3D). |
| - "Athlon" for the AMD K7 family (Athlon/Duron/Thunderbird). |
| - "Crusoe" for the Transmeta Crusoe series. |
| - "Efficeon" for the Transmeta Efficeon series. |
| - "Winchip-C6" for original IDT Winchip. |
| - "Winchip-2" for IDT Winchip 2. |
| - "Winchip-2A" for IDT Winchips with 3dNow! capabilities. |
| - "GeodeGX1" for Geode GX1 (Cyrix MediaGX). |
| - "Geode GX/LX" For AMD Geode GX and LX processors. |
| - "CyrixIII/VIA C3" for VIA Cyrix III or VIA C3. |
| - "VIA C3-2 for VIA C3-2 "Nehemiah" (model 9 and above). |
| |
| If you don't know what to do, choose "386". |
| |
| config M486 |
| bool "486" |
| help |
| Select this for a 486 series processor, either Intel or one of the |
| compatible processors from AMD, Cyrix, IBM, or Intel. Includes DX, |
| DX2, and DX4 variants; also SL/SLC/SLC2/SLC3/SX/SX2 and UMC U5D or |
| U5S. |
| |
| config M586 |
| bool "586/K5/5x86/6x86/6x86MX" |
| help |
| Select this for an 586 or 686 series processor such as the AMD K5, |
| the Cyrix 5x86, 6x86 and 6x86MX. This choice does not |
| assume the RDTSC (Read Time Stamp Counter) instruction. |
| |
| config M586TSC |
| bool "Pentium-Classic" |
| help |
| Select this for a Pentium Classic processor with the RDTSC (Read |
| Time Stamp Counter) instruction for benchmarking. |
| |
| config M586MMX |
| bool "Pentium-MMX" |
| help |
| Select this for a Pentium with the MMX graphics/multimedia |
| extended instructions. |
| |
| config M686 |
| bool "Pentium-Pro" |
| help |
| Select this for Intel Pentium Pro chips. This enables the use of |
| Pentium Pro extended instructions, and disables the init-time guard |
| against the f00f bug found in earlier Pentiums. |
| |
| config MPENTIUMII |
| bool "Pentium-II/Celeron(pre-Coppermine)" |
| help |
| Select this for Intel chips based on the Pentium-II and |
| pre-Coppermine Celeron core. This option enables an unaligned |
| copy optimization, compiles the kernel with optimization flags |
| tailored for the chip, and applies any applicable Pentium Pro |
| optimizations. |
| |
| config MPENTIUMIII |
| bool "Pentium-III/Celeron(Coppermine)/Pentium-III Xeon" |
| help |
| Select this for Intel chips based on the Pentium-III and |
| Celeron-Coppermine core. This option enables use of some |
| extended prefetch instructions in addition to the Pentium II |
| extensions. |
| |
| config MPENTIUMM |
| bool "Pentium M" |
| help |
| Select this for Intel Pentium M (not Pentium-4 M) |
| notebook chips. |
| |
| config MPENTIUM4 |
| bool "Pentium-4/Celeron(P4-based)/Pentium-4 M/Xeon" |
| help |
| Select this for Intel Pentium 4 chips. This includes the |
| Pentium 4, P4-based Celeron and Xeon, and Pentium-4 M |
| (not Pentium M) chips. This option enables compile flags |
| optimized for the chip, uses the correct cache shift, and |
| applies any applicable Pentium III optimizations. |
| |
| config MK6 |
| bool "K6/K6-II/K6-III" |
| help |
| Select this for an AMD K6-family processor. Enables use of |
| some extended instructions, and passes appropriate optimization |
| flags to GCC. |
| |
| config MK7 |
| bool "Athlon/Duron/K7" |
| help |
| Select this for an AMD Athlon K7-family processor. Enables use of |
| some extended instructions, and passes appropriate optimization |
| flags to GCC. |
| |
| config MK8 |
| bool "Opteron/Athlon64/Hammer/K8" |
| help |
| Select this for an AMD Opteron or Athlon64 Hammer-family processor. Enables |
| use of some extended instructions, and passes appropriate optimization |
| flags to GCC. |
| |
| config MCRUSOE |
| bool "Crusoe" |
| help |
| Select this for a Transmeta Crusoe processor. Treats the processor |
| like a 586 with TSC, and sets some GCC optimization flags (like a |
| Pentium Pro with no alignment requirements). |
| |
| config MEFFICEON |
| bool "Efficeon" |
| help |
| Select this for a Transmeta Efficeon processor. |
| |
| config MWINCHIPC6 |
| bool "Winchip-C6" |
| help |
| Select this for an IDT Winchip C6 chip. Linux and GCC |
| treat this chip as a 586TSC with some extended instructions |
| and alignment requirements. |
| |
| config MWINCHIP2 |
| bool "Winchip-2" |
| help |
| Select this for an IDT Winchip-2. Linux and GCC |
| treat this chip as a 586TSC with some extended instructions |
| and alignment requirements. |
| |
| config MWINCHIP3D |
| bool "Winchip-2A/Winchip-3" |
| help |
| Select this for an IDT Winchip-2A or 3. Linux and GCC |
| treat this chip as a 586TSC with some extended instructions |
| and alignment reqirements. Also enable out of order memory |
| stores for this CPU, which can increase performance of some |
| operations. |
| |
| config MGEODEGX1 |
| bool "GeodeGX1" |
| help |
| Select this for a Geode GX1 (Cyrix MediaGX) chip. |
| |
| config MGEODE_LX |
| bool "Geode GX/LX" |
| help |
| Select this for AMD Geode GX and LX processors. |
| |
| config MCYRIXIII |
| bool "CyrixIII/VIA-C3" |
| help |
| Select this for a Cyrix III or C3 chip. Presently Linux and GCC |
| treat this chip as a generic 586. Whilst the CPU is 686 class, |
| it lacks the cmov extension which gcc assumes is present when |
| generating 686 code. |
| Note that Nehemiah (Model 9) and above will not boot with this |
| kernel due to them lacking the 3DNow! instructions used in earlier |
| incarnations of the CPU. |
| |
| config MVIAC3_2 |
| bool "VIA C3-2 (Nehemiah)" |
| help |
| Select this for a VIA C3 "Nehemiah". Selecting this enables usage |
| of SSE and tells gcc to treat the CPU as a 686. |
| Note, this kernel will not boot on older (pre model 9) C3s. |
| |
| endchoice |
| |
| config X86_GENERIC |
| bool "Generic x86 support" |
| help |
| Instead of just including optimizations for the selected |
| x86 variant (e.g. PII, Crusoe or Athlon), include some more |
| generic optimizations as well. This will make the kernel |
| perform better on x86 CPUs other than that selected. |
| |
| This is really intended for distributors who need more |
| generic optimizations. |
| |
| endif |
| |
| # |
| # Define implied options from the CPU selection here |
| # |
| config X86_CMPXCHG |
| bool |
| depends on !M386 |
| default y |
| |
| config X86_XADD |
| bool |
| depends on !M386 |
| default y |
| |
| config X86_L1_CACHE_SHIFT |
| int |
| default "7" if MPENTIUM4 || X86_GENERIC |
| default "4" if X86_ELAN || M486 || M386 || MGEODEGX1 |
| default "5" if MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX |
| default "6" if MK7 || MK8 || MPENTIUMM |
| |
| config RWSEM_GENERIC_SPINLOCK |
| bool |
| depends on M386 |
| default y |
| |
| config RWSEM_XCHGADD_ALGORITHM |
| bool |
| depends on !M386 |
| default y |
| |
| config GENERIC_CALIBRATE_DELAY |
| bool |
| default y |
| |
| config X86_PPRO_FENCE |
| bool |
| depends on M686 || M586MMX || M586TSC || M586 || M486 || M386 || MGEODEGX1 |
| default y |
| |
| config X86_F00F_BUG |
| bool |
| depends on M586MMX || M586TSC || M586 || M486 || M386 |
| default y |
| |
| config X86_WP_WORKS_OK |
| bool |
| depends on !M386 |
| default y |
| |
| config X86_INVLPG |
| bool |
| depends on !M386 |
| default y |
| |
| config X86_BSWAP |
| bool |
| depends on !M386 |
| default y |
| |
| config X86_POPAD_OK |
| bool |
| depends on !M386 |
| default y |
| |
| config X86_CMPXCHG64 |
| bool |
| depends on !M386 && !M486 |
| default y |
| |
| config X86_ALIGNMENT_16 |
| bool |
| depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || X86_ELAN || MK6 || M586MMX || M586TSC || M586 || M486 || MVIAC3_2 || MGEODEGX1 |
| default y |
| |
| config X86_GOOD_APIC |
| bool |
| depends on MK7 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || MK8 || MEFFICEON |
| default y |
| |
| config X86_INTEL_USERCOPY |
| bool |
| depends on MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M586MMX || X86_GENERIC || MK8 || MK7 || MEFFICEON |
| default y |
| |
| config X86_USE_PPRO_CHECKSUM |
| bool |
| depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MEFFICEON || MGEODE_LX |
| default y |
| |
| config X86_USE_3DNOW |
| bool |
| depends on (MCYRIXIII || MK7 || MGEODE_LX) && !UML |
| default y |
| |
| config X86_OOSTORE |
| bool |
| depends on (MWINCHIP3D || MWINCHIP2 || MWINCHIPC6) && MTRR |
| default y |
| |
| config X86_TSC |
| bool |
| depends on (MWINCHIP3D || MWINCHIP2 || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2 || MGEODEGX1) && !X86_NUMAQ |
| default y |