switch-coreboot/payloads/libpayload
Julius Werner 2a9d068721 UPSTREAM: arm64: Align cache maintenance code with libpayload and ARM32
coreboot and libpayload currently use completely different code to
perform a full cache flush on ARM64, with even different function names.
The libpayload code is closely inspired by the ARM32 version, so for the
sake of overall consistency let's sync coreboot to that. Also align a
few other cache management details to work the same way as the
corresponding ARM32 parts (such as only flushing but not invalidating
the data cache after loading a new stage, which may have a small
performance benefit).

BUG=none
BRANCH=none
TEST=none

Change-Id: I36773b526de93ec2367bc7c826e63a68bb8ef6ef
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Original-Commit-Id: baa3e70084
Original-Change-Id: I9e05b425eeeaa27a447b37f98c0928fed3f74340
Original-Signed-off-by: Julius Werner <jwerner@chromium.org>
Original-Reviewed-on: https://review.coreboot.org/19785
Original-Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/521024
Commit-Ready: Patrick Georgi <pgeorgi@chromium.org>
Tested-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-by: Patrick Georgi <pgeorgi@chromium.org>
2017-06-01 14:43:41 -07:00
..
arch UPSTREAM: arm64: Align cache maintenance code with libpayload and ARM32 2017-06-01 14:43:41 -07:00
bin libpayload: Move base address, stack and heap size to Kconfig 2016-03-15 20:53:38 +01:00
configs UPSTREAM: libpayload: Add gru config 2017-04-10 14:28:35 -07:00
crypto libpayload: Make Kconfig bools use IS_ENABLED() 2015-06-30 18:55:15 +02:00
curses UPSTREAM: libpayload/.../PDCurses: Improve compatibility with ncurses 2016-12-16 04:50:58 -08:00
drivers UPSTREAM: detachables: Add invert parameter 2017-05-26 09:47:45 -07:00
gdb UPSTREAM: libpayload/gdb: fix unused variable warning 2017-05-02 20:24:02 -07:00
include UPSTREAM: detachables: Add invert parameter 2017-05-26 09:47:45 -07:00
libc UPSTREAM: libpayload/libc/console: Flush input driver buffer on init 2017-04-21 06:03:50 -07:00
libcbfs UPSTREAM: libpayload: cbfs: Fix minor memory leak in some edge cases 2016-08-15 07:36:11 -07:00
liblz4 cbfs: Add LZ4 in-place decompression support for pre-RAM stages 2016-02-22 21:38:37 +01:00
liblzma UPSTREAM: libpayload: lzma: Allocate scratchpad on the heap 2016-08-13 20:28:18 -07:00
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
Kconfig UPSTREAM: libpayload: split "Drivers" config section in Kconfig 2016-08-10 00:27:33 -07:00
LICENSE_GPL libpayload: Introduce new Kconfig to explicitly allow GPL code 2015-01-09 07:06:27 +01:00
LICENSES libpayload: Add LZ4 decompression algorithm 2015-07-09 00:10:16 +02:00
Makefile UPSTREAM: libpayload: fix build 2017-01-26 18:43:51 -08:00
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

-------------------------------------------------------------------------------
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.