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    SubjectRe: Installing kernel 2.4


    Alan Cox wrote:
    >
    > > There are tests for all this in the feature flags for intel and
    > > non-intel CPUs like AMD -- including MTRR settings. All of this could
    > > be dynamic. Here's some code that does this, and it's similiar to
    > > NetWare. It detexts CPU type, feature flags, special instructions,
    > > etc. All of this on x86 could be dynamically detected.
    >
    > Detection isnt the issue, its optimisations. Our 386 kernel build is the
    > detect all run on any one.
    >
    > > mov sp, bx
    > > mov CPU_TYPE, 3 ; 80386 detected
    > > jz end_get_cpuid
    >
    > This is wrong btw. You don;t check for Cyrix with CPUID disabled or
    > the NexGen or pre CPUID Cyrix...

    Thanks Alan, I'll fix immediately.

    Jeff

    >
    > > check_CMPXCHG8B:
    > > mov ax, word ptr ds:FEATURE_FLAGS
    > > and ax, CMPXCHG8B_FLAG
    > > jz check_4MB_paging
    >
    > This needs a few other bits of interesting checking for non intel chips

    I'll grab the code in linux and port.

    8)

    Jeff
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