coreboot-kgpe-d16/payloads/libpayload
Patrick Georgi c9a6f0f442 Add type field to memranges, and fill it from the source data.
type field contains e820 type ids, which are used by coreboot
and multiboot (the two source formats), so they can be used
as-is.

The MEMMAP_RAM_ONLY define is a way to allow a payload to opt
for only having CB_MEM_RAM type fields, which might be helpful
to support older payloads easily (just add the define, and it
won't encounter "weird" fields)

Signed-off-by: Patrick Georgi <patrick.georgi@coresystems.de>
Acked-by: Peter Stuge <peter@stuge.se>


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4291 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
2009-05-17 20:36:45 +00:00
..
bin This is a safety measure, since the shipping buildrom fails badly at present. 2009-02-15 23:32:57 +00:00
configs add multiboot support to defconfig (trivial) 2008-10-22 11:23:32 +00:00
crypto [PATCH] libpayload: rename config.h to libpayload-config.h 2008-11-24 17:54:46 +00:00
curses Mostly cosmetical changes. 2009-04-29 19:10:10 +00:00
drivers Some driver fixes for libpayload: 2009-04-30 16:46:12 +00:00
i386 Add type field to memranges, and fill it from the source data. 2009-05-17 20:36:45 +00:00
include Add type field to memranges, and fill it from the source data. 2009-05-17 20:36:45 +00:00
lib [PATCH] libpayload: Add multiboot support 2008-10-20 16:51:43 +00:00
libc working memalign version for libpayload. This fixes problems with the USB stack 2009-04-29 19:11:18 +00:00
sample [PATCH] libpayload: rename config.h to libpayload-config.h 2008-11-24 17:54:46 +00:00
util/kconfig 1. 2008-09-23 21:29:53 +00:00
Config.in [PATCH] libpayload: Add multiboot support 2008-10-20 16:51:43 +00:00
Doxyfile [PATCH]: Libpayload: Remove static variables from the doxygen output 2008-08-28 23:10:25 +00:00
LICENSES Document all of the external code we use in libpayload (trivial). 2008-08-11 20:34:50 +00:00
Makefile libpayload: Fix immediate rebuild after a clean 2008-11-25 16:41:21 +00:00
README Add more information to the libpayload README (trivial). 2008-08-18 18:55:33 +00:00

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
------------

 $ svn co svn://coreboot.org/repos/trunk/payloads/libpayload

 $ cd 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.