Hi,
I just want to confirm this:
In cpufeatures.h
(http://lxr.linux.no/source/include/asm-i386/cpufeature.h#L1)
the NCAPSINTS is the Number of Words (32-bits) of CPU info that we have.
It is defined to be 7, but we are using 6?
Secondly, How do we obtain these features from the Hardware ??
A comment there says:
/* Intel-defined CPU features, CPUID level 0x00000001 (ecx), word 4 */
1. What does CPUID Level mean here?
2. What is the role of ECX here.. ?
* Does ECX contain this info at a particular point after boot
time or something similar ?
About data bus width: I looked at the identify_cpu() and
generic_identify() they all talk about the CPU features mentioned in the
cpufeatures.h which I think doesn't talk about the bus width (or does
it?). Hence still no info regarding Data Bus Width!
Thanks for your time,
-Manav
Gaurav Dhiman wrote:
> In kernel mode, you can detect the type of processor. For details on
> this see the kernel function at following link:
> http://lxr.linux.no/source/arch/i386/kernel/cpu/common.c#L320
>
> regrds,
> -Gaurav
>
>
> On 2/21/06, Manav Kataria <manav@xxxxxxxxxxxxx> wrote:
>>
>> How do we find out the bus width of a processor ?
>>
>> Is there anything other than
>> > uname -a
>> that might be able to hint this ?
>>
>> MK.
>
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