coreboot-kgpe-d16/payloads/libpayload
Julius Werner ea03d0047b device/mmio: Make buffer_to_fifo32() take a const buffer
The input buffer to the buffer_to_fifo family of functions is only read,
so it can be a const pointer. (Also, remove the MIPS check in libpayload
for these functions... the MIPS architecture has been removed a while
ago.)

Signed-off-by: Julius Werner <jwerner@chromium.org>
Change-Id: I021069680cf691590fdacc3d51f747f12ae3df31
Reviewed-on: https://review.coreboot.org/c/coreboot/+/57731
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
2021-09-20 12:07:51 +00:00
..
arch payloads/libpayload/arch/arm64/mmu.c: Fix typo in comment 2021-02-05 09:40:39 +00:00
bin libpayload/lpgcc: Drop redundant linker path 2021-01-11 23:33:03 +00:00
configs libpayload: Support herobrine 2021-04-15 19:08:23 +00:00
crypto payloads: Drop unneeded empty lines 2020-09-21 16:20:57 +00:00
curses libpayload: curses: Only call `serial_set_color()` with initialized values 2021-07-14 08:22:05 +00:00
drivers libpayload: cbgfx: Clear screen by sequential access 2021-08-27 02:53:38 +00:00
gdb libpayload: gdb: Condition video console init on LP_VIDEO_CONSOLE 2020-06-22 12:24:42 +00:00
include device/mmio: Make buffer_to_fifo32() take a const buffer 2021-09-20 12:07:51 +00:00
libc device/mmio: Make buffer_to_fifo32() take a const buffer 2021-09-20 12:07:51 +00:00
libcbfs treewide: Remove "this file is part of" lines 2020-05-11 17:11:40 +00:00
liblz4
liblzma payloads: Drop unneeded empty lines 2020-09-21 16:20:57 +00:00
libpci libpayload/libpci: Introduce device class attribute in pci_dev 2020-10-17 16:33:55 +00:00
sample libpayload: Move .xcompile into $(obj) 2021-01-01 21:30:44 +00:00
tests
.gitignore .gitignore: Split into subdirectory files 2020-10-30 07:05:27 +00:00
Doxyfile
Kconfig libpayload: i8042: Enable keyboard translation by default on exit 2021-05-03 15:55:52 +00:00
LICENSES
LICENSE_GPL
Makefile libpayload: Move EXTRA_CFLAGS to enable option override 2021-09-01 19:34:20 +00:00
Makefile.inc libpayload: Move EXTRA_CFLAGS to enable option override 2021-09-01 19:34:20 +00:00
Makefile.payload util/kconfig: Uprev to Linux 5.13's kconfig 2021-07-13 20:28:14 +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.