On Tue, Aug 09, 2005 at 14:56:37 +0900, NAHieu wrote: > hi Jan, > > > On 8/6/05, Jan Hudec <bulb@xxxxxx> wrote: > > On Sat, Aug 06, 2005 at 04:57:46 -0500, NAHieu wrote: > > > Hello, > > > > > > I am writing a kernel module, and want to find if the cpu is x86_32 or > > > x86_64. I looked for everywhere, but still cannot figure out how to > > > determine that information. Anybody could please help me? > > > > Code in kernel is split into generic and architecture specific parts. > > The generic part is supposed to be generic and therefore must not want > > to know. The architecture specific parts are in arch/<platform> and > > include/asm-<platform> (which is then linked to include/asm for current > > platform). > > > > So place the code that needs to be used on x86_32 in arch/i386 and > > include/asm-i386 and place the code that needs to be used on x86_64 in > > arch/x86_64 and include/asm-x86_64. Than call it from the generic code > > elsewhere in the tree as appropriate. > > > > No, my question is a little different: I want to know how to determine > the hardware architecture of the machine (x86_32 or x86_64?) from > kernel code. > > Is this possible to do that? Um, you mean "how do I find whether this i386 kernel runs on x86_32 or x86_64" -- Have a look at how /proc/cpuinfo is generated. ------------------------------------------------------------------------------- Jan 'Bulb' Hudec <bulb@xxxxxx>
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