HI all...
I have introduced in the -jam kernels a cleanup for the x86 cpu selection that
can make things easier for future work.
The patches apply on top of -rc3-aa1, but if there is general interest I can
make them for plain rc3 (or better for final, I know, an rc is not place for
this).
Steps:
- Introduce CONFIG_X86_F00F_BUG (credits to Brian Gerst)
- Make CONFIG_M586 a generic option, not set directly but dependent on
processor specific configs, like GEN586 (generic 586), PENTIUM (a real
intel pentium), PENTIUMMMX
- Make CONFIG_M686 a generic option, not set directly but dependent on
MPENTIUMPRO, MPENTIUM2, MPENTIUM3, MPENTIUM4 (so I splitted PII from
PPro, both were 686).
(now that I think, I could even name it CONFIG_X86_586 and CONFIG_X86_686,
they are an abstract of what _X86_ features are available)
Things end like this for 586:
if [ "$CONFIG_MGEN586" = "y" ]; then
define_bool CONFIG_M586 y
fi
if [ "$CONFIG_MPENTIUM" = "y" ]; then
define_bool CONFIG_M586 y
define_bool CONFIG_X86_TSC_CPU y
fi
if [ "$CONFIG_MPENTIUMMMX" = "y" ]; then
define_bool CONFIG_M586 y
define_bool CONFIG_X86_TSC_CPU y
define_bool CONFIG_X86_GOOD_APIC y
fi
if [ "$CONFIG_M586" = "y" ]; then
define_int CONFIG_X86_L1_CACHE_SHIFT 5
define_bool CONFIG_X86_USE_STRING_486 y
define_bool CONFIG_X86_ALIGNMENT_16 y
define_bool CONFIG_X86_PPRO_FENCE y
define_bool CONFIG_X86_F00F_BUG y
fi
And like this for 686:
if [ "$CONFIG_MPENTIUMPRO" = "y" ]; then
define_bool CONFIG_M686 y
define_int CONFIG_X86_L1_CACHE_SHIFT 5
define_bool CONFIG_X86_PPRO_FENCE y
fi
if [ "$CONFIG_MPENTIUM2" = "y" ]; then
define_bool CONFIG_M686 y
define_int CONFIG_X86_L1_CACHE_SHIFT 5
fi
if [ "$CONFIG_MPENTIUM3" = "y" ]; then
define_bool CONFIG_M686 y
define_int CONFIG_X86_L1_CACHE_SHIFT 5
define_bool CONFIG_X86_SFENCE y
fi
if [ "$CONFIG_MPENTIUM4" = "y" ]; then
define_bool CONFIG_M686 y
define_int CONFIG_X86_L1_CACHE_SHIFT 7
define_bool CONFIG_X86_SFENCE y
define_bool CONFIG_X86_LFENCE y
define_bool CONFIG_X86_MFENCE y
fi
if [ "$CONFIG_M686" = "y" ]; then
define_bool CONFIG_X86_TSC_CPU y
define_bool CONFIG_X86_GOOD_APIC y
define_bool CONFIG_X86_PGE y
define_bool CONFIG_X86_USE_PPRO_CHECKSUM y
fi
Comments ?
Direct to trash ?
--
J.A. Magallon \ Software is like sex: It's better when it's free
mailto:[email protected] \ -- Linus Torvalds, FSF T-shirt
Linux werewolf 2.4.19-rc3-jam1, Mandrake Linux 9.0 (Cooker) for i586
gcc (GCC) 3.1.1 (Mandrake Linux 8.3 3.1.1-0.10mdk)