coreboot-kgpe-d16/payloads/libpayload
Stef van Os c012428291 libpayload: time: split time.h from libpayload.h
Move time functions and prototypes from libpayload.h to time.h.
In a similar manner to other c libary headers, this change makes
porting existing applications to libpayload easier.

Change-Id: I71e27c6dddde6e77e0e9b4d7be7cd5298e03a648
Signed-off-by: Stef van Os <stef.van.os@prodrive-technologies.com>
Reviewed-on: https://review.coreboot.org/14437
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
2016-04-21 23:08:52 +02:00
..
arch libpayload: mmu: Initialize the base 4GiB as device memory 2016-04-05 13:34:47 +02:00
bin libpayload: Move base address, stack and heap size to Kconfig 2016-03-15 20:53:38 +01:00
configs libpayload: disable EHCI & XHCI in defconfig-mips 2016-04-18 14:24:21 +02:00
crypto libpayload: Make Kconfig bools use IS_ENABLED() 2015-06-30 18:55:15 +02:00
curses libpayload: PDCurses: Remove trailing whitespace 2015-11-20 16:27:36 +01:00
drivers libpayload: Split off generic serial API from 8250 driver 2016-04-16 01:08:23 +02:00
gdb tree: drop last paragraph of GPL copyright header 2015-10-31 21:37:39 +01:00
include libpayload: time: split time.h from libpayload.h 2016-04-21 23:08:52 +02:00
libc libpayload/libc: Fix memset/sizeof usage 2016-04-06 13:33:07 +02:00
libcbfs cbfs: Add LZ4 in-place decompression support for pre-RAM stages 2016-02-22 21:38:37 +01:00
liblz4 cbfs: Add LZ4 in-place decompression support for pre-RAM stages 2016-02-22 21:38:37 +01:00
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: Enable USB support by default 2016-04-14 19:48:16 +02:00
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: update junit.xml target, clean up output 2016-03-25 18:18:27 +01:00
Makefile.inc libpayload: update junit.xml target, clean up output 2016-03-25 18:18:27 +01:00
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.