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Variants of the iTCO are integrated into many Intel southbridges.
They are most often accessed via PCI. Add a driver for the variant
found in the q35 QEMU machine.
It should be straight forward to extend the itco_chipset_info array
to support more variants in future as the need arises. To test, use:
qemu-system-x86_64 -M q35 -global ICH9-LPC.noreboot=false
The last option corresponds to a pin strap option, which can't be
influenced from within the VM.
Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Link: https://lore.barebox.org/20210416062436.332665-5-ahmad@a3f.at
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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UEFI specifies two protocols for abstracting both the PCI host bus
controller and for PCI devices. The protocol for PCI devices provides
function pointers for accessing IO Port, Memory and PCI configuration
space, among others. The protocol for bus controllers provides the
ability to read the root bridge's PCI configuration space and to query
resources.
In barebox, we would want to reuse existing PCI drivers unmodified, so
we utilize the root bridge protocol, unlike most other EFI payloads.
We still utilize the PCI (device) IO protocol, but not for core
functionality: EFI has already enumerated the bus for us and allocated
the EFI handles. It thus makes sense to have the new pci device have the
EFI handle as parent and the controller as grand parent instead of
being sibling with the EFI handles. This is done with an early PCI fixup
that patches the device's parent pointer after consulting the PCI IO
GetLocation.
Driver is written from scratch and hasn't seen heavy usage yet, so it
should be used with care. It was written while consulting the UEFI
2.1D specification.
Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Link: https://lore.barebox.org/20210416062436.332665-4-ahmad@a3f.at
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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The 16-bit port has experienced bitrot and failed to compile with more
recent linkers for at least a year. Fixing the linker error is insufficient
to restore a barebox that can boot to shell. This continued breakage likely
means that there are no users interested in updating. As new x86 projects
should be using MACH_EFI_GENERIC anyway, retire support for 16-bit legacy
boot (MACH_X86_GENERIC).
Acked-by: Juergen Borleis <jbe@pengutronix.de>
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Enable some more options to make the defconfig more widely applicable.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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For most machines having DRIVER_SERIAL_NS16550 and DRIVER_SERIAL_EFI_STDIO
both enabled results in the output appearing twice on the serial output.
So remove disable the lowlevel driver and rely on the EFI bios for serial.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Done with the same script used to generate commit d952a0eeba37
("Regenerate defconfig files").
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Update defconfig files with the following script.
for a in arch/*; do
arch=$(basename $a)
for c in $a/configs/*; do
config=$(basename $c)
export ARCH=$arch
make $config && make savedefconfig && mv defconfig $c
done
done
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
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Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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prepare to drop the efi arch as efi boot up is not arch sepecific
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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The defconfig files are long untouched and a
make xy_defconfig; make savedefconfig usually generates quite
a different looking file. Refresh them to make it easier to generate
patches against the configs using
make xy_defconfig; make menuconfig; make savedefconfig
This has been done with the following script.
for a in arch/*; do
arch=$(basename $a)
for c in $a/configs/*; do
config=$(basename $c)
export ARCH=$arch
make $config && make savedefconfig && mv defconfig $c
done
done
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
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this will reduce and simplify defconfigs maintainance
it will also save some disk space
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
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this will allow each arch to handle the boards more simply and depending on
there need
the env var BOARD will refer to the current board dirent
for sandbox as we have only one board the board dirent is arch/sandbox/board
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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This code adds a generic x86 platform, enabling barebox to act as a
bootloader like 'GRUB'. Very minimalistic, yet. Supports only a serial console
and is tested with QEMU only.
Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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