nuttx/libs
Guiding Li 8b92305265 This commit brings in the drivers needed to support OpenAMP. These changes were ported from https://github.com/FishsemiCode/nuttx. The current state: Most drivers do now compile but are not yet verfied.
This port was effort of a number of people, I rather arbitrarily gave authorship to Guiding Li because he has the largest number of fundamental quashed commits from the Xiamoi repository.

Squashed commit of the following:

Author: Xiang Xiao <xiaoxiang@pinecone.net>
    include/nuttx/b2c.h and libx/libc/string:  Add non-standard string functions to deal with cases where there are more than 8-bits in a type char.

Author: Gregory Nutt <gnutt@nuttx.org>
    Fix several build issues/missing definitiona needed for OpenAMP build in drivers/.
    Add OpenAMP code has been reviewed and ran through tools/nxstyle (with all reports accounted for).

Author: Xiang Xiao <xiaoxiang@xiaomi.com>
    tools/:  Fix the minor issue in Makefile

Author: Gregory Nutt <gnutt@nuttx.org>
    drivers/rptun/rptun.c:  Review for coding standard.  Run against tools/nxstyle.
    tools/LibTargets.mk:  Fix some TABs that were turned into spaces by a copy-paste.
    fs/hostfs:  Add configure and build support for hostfs RPC.
    drivers/timer:  Add configure and build support for syslog RTC.
    drivers/syslog:  Add configure and build support for syslog RPC.
    drivers/serial:  Add configure and build support for serial RPC.
    Kconfig, tools/*.mk. openamp/:  Add basic OpenAMP build support.
    drivers/rptun:  Add configure and build support for OpenAMP tunnel drivers.
    drivers/net:  Update Make.defs and Kconfig for OpenSDA support.
    Remove drivers/clk/clk-rpmsg.c drivers/power/rpmsg_regulator.c.  These depend on upstreaming support for a new subsystem based on the clk/regulator is model from Linux.  Removed because we want to separate the activities.  We will just try to get the basic OpenAMP support in place for now.
    Remove drivers/misc/misc_rpmsg.c and include/nuttx/misc/misc_rpmsg.h.  These are specific to the Xiaomi application.

Author: zhuyanlin <zhuyanlin@pinecone.net>
    This commit brings in the OpenAMP OS driver/RPC components from https://github.com/FishsemiCode/nuttx.  Initial commit is source files only.  Additional changes to Kconfig and Make.defs files still needed.

Author: Jianli Dong <dongjianli@pinecone.net>
    This commit brings in the OpenAMP OS driver/RPC components from https://github.com/FishsemiCode/nuttx.  Initial commit is source files only.  Additional changes to Kconfig and Make.defs files still needed.

Author: Guiding Li <liguiding@pinecone.net>
    This commit brings in the OpenAMP OS driver/RPC components from https://github.com/FishsemiCode/nuttx.  Initial commit is source files only.  Additional changes to Kconfig and Make.defs files still needed.
2019-11-02 11:30:33 -06:00
..
libc This commit brings in the drivers needed to support OpenAMP. These changes were ported from https://github.com/FishsemiCode/nuttx. The current state: Most drivers do now compile but are not yet verfied. 2019-11-02 11:30:33 -06:00
libdsp Fix use of undefined pp-token #errror, other typos. 2019-09-19 18:19:18 -06:00
libnx Fix minor typos in docs and comments. 2019-09-29 12:52:20 -06:00
libxx libs/libxx/Kconfig: CONFIG_LIBC_LOCALE is needed to build libcxx. A 2019-10-12 08:51:13 +08:00
README.txt Remove trailing spaces at the end of lines. 2018-08-13 07:39:38 -06:00

README
======

This directory holds NuttX libraries.  Libraries in NuttX are very special
creatures.  The have these properties:

1. They can be shared by both application logic and logic within the OS when
   using the FLAT build.

2. But in PROTECTED and KERNEL modes, they must be built differently:  The
   copies used by applications and the OS cannot be the same.  Rather,
   separate versions of libraries must be built for the kernel and for
   applications.

3. When used by the OS, some special care must be taken to assure that the
   OS logic does not disrupt the user's errno value and that the OS does
   not create inappropriate cancellation points.

   For example, sem_wait() is both a cancellation point and modifies the
   errno value.  So within the FLAT build and without kernel version for
   the PROTECTED and KERNEL builds, the special internal OS interface
   nxsem_wait() must be used.  Within libraries, the macro  _SEM_WAIT()
   (as defined in include/nuttx/semaphore.h) is used instead.  The
   definition of this macro accounts for the different usage environments.

NOTE:  The libraries under libs/ build differently from other NuttX
components:  There are no build-related files in the libs/ directory; it
is simply a container for other well-known, individual library directories.
The upper level Makefile logic is aware of the libraries within the libs/
container.

The only real function of the libs/ directory is to prevent the top-level
directory from becoming cluttered with individual libraries.