Files
system76-coreboot/payloads/libpayload
Aaron Durbin 9425a545d7 libpayload arm64: fix mmu bugs
1. keep functions and objects used entirely within mmu.c as static.
2. DMA region finding needs to terminate. Therefore, the next address
   to be attempted needs to be less then the current end address.
3. Ensure mmu_ranges passed to mmu_init_ranges_from_sysinfo() has
   0 entries marked as used.

BUG=chrome-os-partner:31634
BRANCH=None
TEST=Booted ryu with RAM hole above cbmem tables below 4GiB.

Change-Id: I71a9cb89466978aa63fca5d8bee97b8af75ea206
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 66518fd86e676bbddf52e9d9afdd76d72c8e2222
Original-Change-Id: I5cb4e5009359cb04c4e1b5fe60845f80fbdff02c
Original-Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/221725
Original-Reviewed-by: Furquan Shaikh <furquan@chromium.org>
Original-Tested-by: Furquan Shaikh <furquan@chromium.org>
Original-Commit-Queue: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: http://review.coreboot.org/8793
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
2015-03-21 13:39:42 +01:00
..
2015-03-21 13:39:42 +01:00
2015-03-21 13:39:42 +01:00
2012-04-04 00:40:31 +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.