Messages in this thread | | | From | Matteo Croce <> | Date | Thu, 15 Apr 2010 19:36:25 +0200 | Subject | Re: AMD Geode i686 |
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On Thu, Apr 15, 2010 at 7:32 PM, Lennart Sorensen <lsorense@csclub.uwaterloo.ca> wrote: > On Thu, Apr 15, 2010 at 07:20:27PM +0200, Matteo Croce wrote: >> 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 > > But if I don't have CONFIG_MGEODE_LX then what is going to call the > $do_nopl_emu in entry_32.S? > > -- > Len Sorensen >
#if defined(CONFIG_MGEODE_LX) || defined(MGEODEGX1)
sort of..
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