[coreboot] Adding CAR support to v2

ron minnich rminnich at gmail.com
Mon Jun 15 17:45:33 CEST 2009

This is the beginning of CAR support for v2 for qemu. It is done in
such a way that few changes are required and, more the the point,
romcc-based qemu targets keep working and remain the default for now.

It builds on but substantially improves the v3 model, a most important
point being that there are *no* included code files in .c or .S.

The .S code is from v3, however.

This is working and boots to linux in both car and non-car versions.

Note that I use the name 'rom.c' instead of the awkward 'cache_as_ram_auto.c'.

Some work remains. We need to have a standard rom main as we do in v3
(we call it stage0/1 in v3). But this is a good start IMHO.

comments from the patch:
Note that the current non-CAR implementation is the default and
continues to work (tested FILO boot to Linux
on both CAR and non-CAR).

Index: src/mainboard/emulation/qemu-x86/Config.lb
Change this to be sensitive to USE_DCACHE_RAM. All settings etc. that
depend on this variable are grouped
in one if, and the other parts (romcc etc.) are in the else. This
change is a model of how we should be able to do
other motherboards.

Index: src/mainboard/emulation/qemu-x86/Options.lb
add needed options.

Index: src/mainboard/emulation/qemu-x86/failover.c
remove code inclusion from this not-yet-used file.

Index: src/mainboard/emulation/qemu-x86/rom.c
This is the entry point for the rom-based code. Called stage1.c in v3.

Index: src/lib/Config.lb
change initobject to a .o from a .c; this fixed a build problem.

Index: src/pc80/serial.c
make uart_init non-static.

Index: src/pc80/Config.lb
add initobject

Index: src/arch/i386/init/entry.S
Entry point. Unify a bunch of files that were fiddly lttle includes. From v3.

Index: src/arch/i386/init/ldscript.ld
new file. The goal is to hang all init changes for CAR here, to
minimize other changes to any
other ldscript. Besides, putting this in init makes sense; entry and
car are manage init.

Index: src/arch/i386/init/car.S
generic i386 car code from v3.

Index: src/arch/i386/init/ldscript_fallback_cbfs.lb
Fix what looks like a bug: this was not including the init.text section.

Index: targets/emulation/qemu-x86/Config.lb
push up the console loglevel. qemu is for debugging so we might as well
get all the debugging we can.

Index: targets/emulation/qemu-x86/Config-car.lb
For CAR bullds.

Signed-off-by: Ronald G. minnich <rminnich at gmail.com>

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