coreboot-v2 only. This gets you guys a compiling v3 tree again. Sorry
for the inconvenience.
Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Stefan Reinauer <stepan@coresystems.de>
git-svn-id: svn://coreboot.org/repository/coreboot-v3@1177 f3766cd6-281f-0410-b1cd-43a5c92072e9
drop most of the crappy vm86 code and replace it with a rewritten
version that has all assembler in a .S file and all C code in a .c
file. Also, remove requirement to move around between GDTs.
This version includes the suggestions from Peter to clean up CR0 manipulation
and to guard critical code paths by cli/sti. Tested and working on my hardware.
Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Peter Stuge <peter@stuge.se>
git-svn-id: svn://coreboot.org/repository/coreboot-v3@1167 f3766cd6-281f-0410-b1cd-43a5c92072e9
it in the v2 tree as well. Requires the yabel-prereq.diff patch in order to
work in v2.
Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Joseph Smith <joe@settoplinux.org>
git-svn-id: svn://coreboot.org/repository/coreboot-v3@1141 f3766cd6-281f-0410-b1cd-43a5c92072e9
Carl-Daniel Hailfinger wrote:
> On 18.02.2008 23:55, Marc Jones wrote:
>> Carl-Daniel Hailfinger wrote:
>>> it seems that executing VSA requires vm86 to be useful. Since we
>>> unconditionally execute the VSA, we should unconditionally require
vm86
>>> support (PCI_OPTION_ROM_RUN_VM86) via Kconfig for Geode targets. Not
>>> doing so will either cause compile failures or runtime failures.
>>>
>>> Adding
>>> select PCI_OPTION_ROM_RUN_VM86
>>> below
>>> config CPU_AMD_GEODELX
>>> did not work out for me.
>> Sorry I missed this.
>>
>> VSA requires the GDT that is in vm86.c. VSA loads similar to an
option
>> ROM so the loader does go into VM86 mode. All the other stuff like
>> interrupt support and PCI BIOS isn't needed by VSA. I think that the
>> GDT at the top of vm86.c can be moved to a header file, gdt.h or
>> something like that.
>
> northbridge/amd/geodelx/vsmsetup.c uses
> util/x86emu/vm86.c:setup_realmode_idt() but it seems most/all of the
> setup there is not needed at all for VSA. Pulling in
setup_realmode_idt
> pulls in the rest of vm86 through direct and indirect dependencies.
>
>> Care to make a patch? :)
>
I am also leaning towards removing the IDT for VSA init. There is a risk
if either an exception happens or a software interrupt is used you will
get unexpected results. What probably happens is that you jump off to
something that will eventually cause a triple fault and reboot. You may
think this is bad (and it is) but it is the same risk that coreboot runs
today. If coreboot had a generic IDT to handle exceptions, VSA init
would use the same IDT. Note that hardware INT (even timers) should
never happen as they are always masked.
I have built with no PCI_OPTION_ROM_RUN_VM86 and run this to filo.
- Show quoted text -
Marc
--
Marc Jones
Senior Firmware Engineer
(970) 226-9684 Office
mailto:Marc.Jones@amd.com
http://www.amd.com/embeddedprocessors
Reduce the amount of compilation errors for Geode LX targets if x86emu
or no emulation is selected instead of vm86.
Factor out GDT code from vm86.c to vm86_gdt.c
Remove IDT setup for VSA init.
Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Signed-of-by: Marc Jones <marc.jones@amd.com>
This has booted to runlevel 3 and the ethernet works fine.
Acked-by: Ronald G. Minnich <rminnich@gmail.com>
git-svn-id: svn://coreboot.org/repository/coreboot-v3@613 f3766cd6-281f-0410-b1cd-43a5c92072e9
