coreboot-kgpe-d16/payloads/libpayload
Thomas Heijligen 2332d29ba9 libpayload: Fix compiler warnings
Following warnings occur when compiling with
`i386-elf-gcc (coreboot toolchain v2022-09-18_c8870b1334) 11.2.0`

drivers/serial/8250.c:75: [-Werror=unused-variable]
  Move variable declaration inside the
  `#if !CONFIG(LP_PL011_SERIAL_CONSOLE)` block

drivers/udc/dwc2.c:505: [-Werror=format=]
  use `%zd` to match type `size_t`

Change-Id: Id285c24cba790f181fa203f3117e5df35bed27c4
Signed-off-by: Thomas Heijligen <src@posteo.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/69764
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Felix Singer <felixsinger@posteo.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2022-11-21 21:08:30 +00:00
..
arch x86/cache.c: Implement dcache_* 2022-09-01 14:21:11 +00:00
bin commonlib: Clean up compiler.h 2022-06-07 12:34:35 +00:00
configs libpayload: Enable PCIe driver for sc7280 2022-08-01 18:04:54 +00:00
crypto
curses
drivers libpayload: Fix compiler warnings 2022-11-21 21:08:30 +00:00
gdb
include coreboot_tables: Drop uart PCI addr 2022-10-26 14:12:06 +00:00
libc libpayload: Add const for dma_coherent argument 2022-08-24 21:27:46 +00:00
libcbfs cbfs/vboot: Adapt to new vb2_digest API 2022-09-02 23:51:29 +00:00
liblz4
liblzma
libpci
sample
tests tests: Add support for tests build failures detection 2022-09-21 14:06:42 +00:00
vboot
.gitignore
Doxyfile
Kconfig libpayload/pci: Add pci_map_bus function for Qualcomm platform 2022-08-01 18:04:54 +00:00
LICENSES
LICENSE_GPL
Makefile
Makefile.inc libpayload/Makefile.inc: Initialize vboot submodule 2022-06-20 13:54:31 +00:00
Makefile.payload libpayload/Makefile.payload: Fix CFLAGS 2022-06-15 18:06:39 +00:00
README

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.