coreboot-kgpe-d16/payloads/libpayload
satya priya 5c44c4ac7d libpayload: Add BIT(x) macro definition
Add BIT(x) macro definition in libpayload.

Change-Id: I15ca2d3758d516cecf9edd60af47e7fdbd808c40
Signed-off-by: satya priya <skakit@codeaurora.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37254
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
2019-11-28 10:51:49 +00:00
..
arch Remove MIPS architecture 2019-11-20 10:10:48 +00:00
bin Remove MIPS architecture 2019-11-20 10:10:48 +00:00
configs Remove MIPS architecture 2019-11-20 10:10:48 +00:00
crypto payloads: Replace all IS_ENABLED(CONFIG_XXX) with CONFIG(XXX) 2019-03-07 17:15:30 +00:00
curses libpayload: Enable -Wimplicit-fallthrough 2019-07-21 17:17:42 +00:00
drivers Remove MIPS architecture 2019-11-20 10:10:48 +00:00
gdb
include libpayload: Add BIT(x) macro definition 2019-11-28 10:51:49 +00:00
libc Remove MIPS architecture 2019-11-20 10:10:48 +00:00
libcbfs payloads: Replace all IS_ENABLED(CONFIG_XXX) with CONFIG(XXX) 2019-03-07 17:15:30 +00:00
liblz4
liblzma
libpci
sample Remove MIPS architecture 2019-11-20 10:10:48 +00:00
tests
Doxyfile
Kconfig Remove MIPS architecture 2019-11-20 10:10:48 +00:00
LICENSES
LICENSE_GPL
Makefile Remove MIPS architecture 2019-11-20 10:10:48 +00:00
Makefile.inc Remove MIPS architecture 2019-11-20 10:10:48 +00:00
README payloads/libpayload: Update a Makefile for sample libpayload 2019-06-21 09:16:36 +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 https://www.coreboot.org for details on coreboot.


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

 $ git clone https://review.coreboot.org/coreboot.git

 $ cd coreboot/payloads/libpayload

 $ make menuconfig

 $ make

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

On x86 systems, libpayload will always be 32-bit even if your host OS runs
in 64-bit, so you might have to install the 32-bit libgcc version.
On Debian systems you'd do 'apt-get install gcc-multilib' for example.

Run 'make distclean' before switching boards. This command will remove
your current .config file, so you need 'make menuconfig' again or
'make defconfig' in order to set up configuration. Default configuration
is based on 'configs/defconfig'. See the configs/ directory for examples
of configuration.


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 https://www.coreboot.org/Libpayload.

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


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

See LICENSES.