Messages in this thread |  | | Date | Tue, 07 Nov 2000 17:47:48 -0700 | From | "Jeff V. Merkey" <> | Subject | Re: 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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
|  |