Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

MFC: r233287

Use the common/shared CRC-32 implementation instead of duplicating it.

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Mostly revert r200691. U-Boot syscall() entry point returns 1 on success.

Fix ub_env_enum(): syscall() returns 0 when properly invoked.

- Remove trailing ";" after if statement
- Remove #if 0 section that was never needed/used

Reviewed by: raj@
MFC after: 1 month

Initial storage functionality for U-Boot support library.

- Only non-sliced bsdlabel style partitioning is currently supported (but provisions
are made towards GPT support, which should follow soon)
- Enable storage support in loader on ARM

Obtained from: Semihalf

Initial support of loader(8) for ARM machines running U-Boot.

This uses the common U-Boot support lib (sys/boot/uboot, already used on
FreeBSD/powerpc), and assumes the underlying firmware has the modern API for
stand-alone apps enabled in the config (CONFIG_API).

Only netbooting is supported at the moment.

Obtained from: Marvell, Semihalf

Minor style(9) fixes for U-Boot API glue.

U-Boot API glue improvements:

- extend ub_dev_read() and ub_dev_recv() so that the actual len and
all error codes can be passed and processed properly; unify behaviour of
these routines

- introduce syscall general error code (API_ESYSC)

Improve loader support for U-Boot.

- add new diag commands: devinfo, sysinfo for U-Boot-style details about the system
configuration
- better memory info summary
- style corrections

Obtained from: Semihalf

style(9) & style.Makefile(9)

Reviewed by: raj

Eliminate artificial increasing of 'netdev_opens' counter in loader's net_open().

This was introduced as a workaround long time ago for some Alpha firmware
(which is now gone), and actually prevented net_close() to ever be
called.

Certain firmwares (U-Boot) need local shutdown operations to be performed on a
network controller upon transaction end: such platform-specific hooks are
supposed to be called via netif_close() (from within net_close()).

This change effectively reverts the following CVS commit:

sys/boot/common/dev_net.c

revision 1.7
date: 2000/05/13 15:40:46; author: dfr; state: Exp; lines: +2 -1
Only probe network settings on the first open of the network device.
The alpha firmware takes a seriously long time to open the network device
the first time.

Also suppress excessive output while netbooting via loader, unless debugging.

While there, make sys/boot/uboot more style(9) compliant.

Reviewed by: imp
Approved by: cognet (mentor)

o Build libuboot with -msoft-float like everything else.
o Move the API prototypes to a separate header (glue.h)
o Allow the platform to hint libuboot about where to look
for the API signature. The uboot_address variable is
expected to be defined by the platform.

MFp4 (e500):

Add support for U-Boot. This uses the U-Boot API as developed by
Rafal and which is (will be) part of U-Boot 1.3.2 and later.

Credits to: raj@