coreboot-kgpe-d16/payloads/libpayload
Daisuke Nojiri 2ccb280f51 cbfs: read cbfs offset and size from sysinfo
This change allows libpayload to read cbfs offset and size from sysinfo.
Legacy way of locating cbfs reagion is still supported in case sysinfo
doesn't store the offset and the size.

BUG=none
BRANCH=master
TEST=tested on samus and smaug

Change-Id: I86434fd249467e7c90d59d6b82f0e6c514bc2d05
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 548a74b7a0758c3f9ba6809425d0fb9c6a5e9d7c
Original-Change-Id: I190d5545a65228483204bf1aa1cbf5a80db31ae0
Original-Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/296993
Original-Commit-Ready: Daisuke Nojiri <dnojiri@google.com>
Original-Tested-by: Daisuke Nojiri <dnojiri@google.com>
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/11557
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
2015-10-28 22:26:17 +01:00
..
arch arm64: mmu: Prevent CPU prefetch instructions from device memory 2015-09-28 09:36:32 +00:00
bin arm64: xcompile: Add support for A53 erratum 843419 2015-08-28 06:46:09 +00:00
configs libpayload/configs: Add default configuration with TinyCurses enabled 2015-10-17 06:53:37 +00:00
crypto libpayload: Make Kconfig bools use IS_ENABLED() 2015-06-30 18:55:15 +02:00
curses libpayload: Make Kconfig bools use IS_ENABLED() 2015-06-30 18:55:15 +02:00
drivers cbgfx: Fix spelling of calculate_position() 2015-10-28 17:09:59 +01:00
gdb Remove address from GPLv2 headers 2015-05-21 20:50:25 +02:00
include libpayload/libcbgfx: Add license headers 2015-10-27 16:49:10 +01:00
libc libpayload: Fix default_memmove() implementation 2015-08-19 16:35:08 +00:00
libcbfs cbfs: read cbfs offset and size from sysinfo 2015-10-28 22:26:17 +01:00
liblz4 libpayload: lz4: Add output overrun check to incompressible case 2015-07-21 21:27:42 +02:00
liblzma lzma: Return correct amount of decompressed bytes 2015-07-06 09:40:37 +02:00
libpci Remove empty lines at end of file 2015-06-08 00:55:07 +02:00
sample Remove empty lines at end of file 2015-06-08 00:55:07 +02:00
tests Remove empty lines at end of file 2015-06-08 00:55:07 +02:00
Doxyfile Run doxygen -u on doxygen configuration files 2010-06-28 10:40:38 +00:00
Kconfig libpayload/Kconfig: Use official spelling for TinyCurses 2015-10-17 06:53:52 +00:00
LICENSES libpayload: Add LZ4 decompression algorithm 2015-07-09 00:10:16 +02:00
LICENSE_GPL libpayload: Introduce new Kconfig to explicitly allow GPL code 2015-01-09 07:06:27 +01:00
Makefile libpayload: Add missing autoconf dependency 2015-09-10 09:18:12 +00:00
Makefile.inc libpayload: Use CONFIG_LP_CCACHE instead of CONFIG_CCACHE 2015-08-09 21:02:37 +02:00
README Remove empty lines at end of file 2015-06-08 00:55:07 +02:00

README

-------------------------------------------------------------------------------
libpayload README
-------------------------------------------------------------------------------

libpayload is a minimal library to support standalone payloads
that can be booted with firmware like coreboot. It handles the setup
code, and provides common C library symbols such as malloc() and printf().

Note: This is _not_ a standard library for use with an operating system,
rather it's only useful for coreboot payload development!
See http://coreboot.org for details on coreboot.


Installation
------------

 $ git clone http://review.coreboot.org/p/coreboot.git

 $ cd coreboot/payloads/libpayload

 $ make menuconfig

 $ make

 $ sudo make install (optional, will install into /opt per default)

As libpayload is for 32bit x86 systems only, you might have to install the
32bit libgcc version, otherwise your payloads will fail to compile.
On Debian systems you'd do 'apt-get install gcc-multilib' for example.


Usage
-----

Here's an example of a very simple payload (hello.c) and how to build it:

 #include <libpayload.h>

 int main(void)
 {
     printf("Hello, world!\n");
     return 0;
 }

Building the payload using the 'lpgcc' compiler wrapper:

 $ lpgcc -o hello.elf hello.c

Please see the sample/ directory for details.


Website and Mailing List
------------------------

The main website is http://www.coreboot.org/Libpayload.

For additional information, patches, and discussions, please join the
coreboot mailing list at http://coreboot.org/Mailinglist, where most
libpayload developers are subscribed.


Copyright and License
---------------------

See LICENSES.