Messages in this thread | | | Date | Thu, 15 Apr 2010 13:11:11 -0400 | Subject | Re: AMD Geode i686 | From | (Lennart Sorensen) |
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On Mon, Mar 01, 2010 at 11:03:09PM +0100, Matteo Croce wrote: > Hi, > I have refreshed my AMD Geode i686 patch with NOPL and I have added a > new nice feature. > When a NOPL is found the parser looks for any NOPL after the current > one, so they are emulated in bulk. > Tested ok on a Pcengines Alix. > > Signed-off-by: Matteo Croce <technoboy85@gmail.com> > > --- a/arch/x86/kernel/Makefile 2010-03-01 01:18:51.697166322 +0100 > +++ b/arch/x86/kernel/Makefile 2010-03-01 01:19:45.727095700 +0100 > @@ -89,6 +89,8 @@ > obj-$(CONFIG_HPET_TIMER) += hpet.o > > obj-$(CONFIG_K8_NB) += k8.o > +obj-$(CONFIG_MGEODEGX1) += nopl_emu.o > +obj-$(CONFIG_MGEODE_LX) += nopl_emu.o > obj-$(CONFIG_DEBUG_RODATA_TEST) += test_rodata.o > obj-$(CONFIG_DEBUG_NX_TEST) += test_nx.o > > --- a/arch/x86/kernel/cpu/amd.c 2010-03-01 01:18:51.737097341 +0100 > +++ b/arch/x86/kernel/cpu/amd.c 2010-03-01 01:19:27.867865836 +0100 > @@ -138,8 +138,10 @@ > } > > if (c->x86_model == 10) { > - /Index: linux-2.6.33/arch/x86/kernel/Makefile > =================================================================== > * AMD Geode LX is model 10 */ > - /* placeholder for any needed mods */ > + /* Geode only lacks the NOPL instruction to be i686, > + but we can emulate it in the exception handler > + and promote it to a class 6 cpu */ > + boot_cpu_data.x86 = 6; > return; > } > } > --- a/arch/x86/kernel/entry_32.S 2010-03-01 01:18:51.717096708 +0100 > +++ b/arch/x86/kernel/entry_32.S 2010-03-01 01:19:27.867865836 +0100 > @@ -960,7 +960,11 @@ > RING0_INT_FRAME > pushl $0 > CFI_ADJUST_CFA_OFFSET 4 > +#ifdef CONFIG_MGEODE_LX > + pushl $do_nopl_emu > +#else > pushl $do_invalid_op > +#endif
How does this work for MGEODEGX1 when it looks for MGEODE_LX? It seems you made both link against the code above after all. Is this wrong or the above?
Can it not work if you want to run a generic kernel on your Geode rather than one built explicitly for the LX? I build one kernel to run on Geode SC1200 and Geode LX.
-- Len Sorensen
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