Messages in this thread | | | From | Matteo Croce <> | Date | Thu, 15 Apr 2010 19:20:27 +0200 | Subject | Re: AMD Geode i686 |
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On Thu, Apr 15, 2010 at 7:11 PM, Lennart Sorensen <lsorense@csclub.uwaterloo.ca> wrote: > 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 >
This code should work for Geode GX too. Try it and report success please
-- Matteo Croce OpenWrt developer _______ ________ __ | |.-----.-----.-----.| | | |.----.| |_ | - || _ | -__| || | | || _|| _| |_______|| __|_____|__|__||________||__| |____| |__| W I R E L E S S F R E E D O M KAMIKAZE (bleeding edge) ------------------ * 10 oz Vodka Shake well with ice and strain * 10 oz Triple sec mixture into 10 shot glasses. * 10 oz lime juice Salute! --------------------------------------------------- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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