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Coreboot (http://www.coreboot.org) allows to save the firmware console output in a memory buffer. With this patch, the address of this memory buffer is obtained from coreboot tables on x86 chromebook devices declaring an ACPI device with name matching GOOGCB00 or BOOT0000. If the memconsole-coreboot driver is able to find the coreboot table, the memconsole driver sets the cbmem_console address and initializes the memconsole sysfs entries. The coreboot_table-acpi driver is responsible for setting the address of the coreboot table header when probed. If this address is not yet set when memconsole-coreboot is probed, then the probe is deferred by returning -EPROBE_DEFER. This patch is a rework/split/merge of patches from the chromeos v4.4 kernel tree originally authored by: Vadim Bendebury <vbendeb@chromium.org> Wei-Ning Huang <wnhuang@google.com> Yuji Sasaki <sasakiy@google.com> Duncan Laurie <dlaurie@chromium.org> Julius Werner <jwerner@chromium.org> Brian Norris <briannorris@chromium.org> Signed-off-by: Thierry Escande <thierry.escande@collabora.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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| README | ||
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.