Modifications are based on the linux kernel approach and
support two use cases:

  1) Add O= to the make command line
  'make O=/tmp/build all'

  2) Set environement variable BUILD_DIR to point to the desired location
  'export BUILD_DIR=/tmp/build'
  'make'

The second approach can also be used with a MAKEALL script
'export BUILD_DIR=/tmp/build'
'./MAKEALL'

Command line 'O=' setting overrides BUILD_DIR environent variable.

When none of the above methods is used the local build is performed and
the object files are placed in the source directory.

Patch by Martin Krause, 20 Mar 2006

Signed-off-by: Martin Krause <martin.krause@tqs.de>

Patch by Kumar Gala, 10 Feb 2006

- Support for TQM8541/8555 boards added.
- Complete rework of TQM8540/8560 support.
- Common TQM85xx code now supports all current TQM85xx platforms
  (TQM8540/8541/8555/8560).
- DDR SDRAM size detection added.
- CAS latency default values can be overwritten by setting "serial#"
  to e.g. "ABC0001 casl=25" -> CAS latency 2.5 will be used.
  If problems are detected with this non default CAS latency,
  the defualt values will be used instead.
- FLASH size detection added.
- Moved FCC ethernet driver initialization behind TSEC driver init
  -> TSEC is first device.

Patch by Stefan Roese, 30 Nov 2005

Patch by Kylo Ginsberg, 13 Apr 2005

The global data pointer, stored in r29 before relocation to RAM, was
not initialized to a correct value. This happened because the pointer
declaration was done locally in the scope of the board_init_f()
function. What follows is a cite from gcc.info, 5.37, "Variables in
Specified Registers":
    ...
    The compiler's data flow analysis is capable of determining where
    the specified registers contain live values, and where they are
    available for other uses. Stores into local register variables
    may be deleted when they appear to be dead according to dataflow
    analysis. References to local register variables may be deleted
    or moved or simplified.
    ...
Moving the global data declaration to global scope solved the
problem.

Second serial port on 440GX now defined as a system device.
Add 'Short Etch' code for Cicada PHY within 440gx_enet.c
Patch by Travis B. Sawyer, 12 Jul 2005

Check return value of malloc in 440gx_enet.c
Patch by Travis B. Sawyer, 18 Jul 2005

Patch by Stefan Roese, 08 Aug 2005

Patch by Steven Blakeslee, 27 Jul 2005

  Add support for the Freescale MPC8349ADS board.

  - Convert the CPM2 based functionality to use new CONFIG_CPM2
    option rather than a myriad of CONFIG_MPC8560-like variants.
    Applies to MPC85xx and MPC8260 boards, includes stxgp3 and sbc8560.
    Eliminates the CONFIG_MPC8560 option entirely.  Distributes the
    new CONFIG_CPM2 option to each 8260 board.

Add support for Funkwerk VoVPN gateway module.

* Cleanup confusing use of CONFIG_ETH*ADDR - ust his only to
  pre-define a MAC address; use CONFIG_HAS_ETH* to enable support for
  additional ethernet addresses.

* Cleanup drivers/i82365.c - avoid duplication of code

* Fix bogus "cannot span across banks" flash error message

* Add support for CompactFlash for the CPC45 Board.

  - Enable booting directly from flash
  - fix CMC_PU2 flash driver

* Fix mkimage usage message

- add support for MPC8220 CPU
- Add support for Alaska and Yukon boards

- Add support for the MPC8541 and MPC8555 CDS boards
- Cleanup eth?addr handling: make dependent on CONFIG_ETH?ADDR

  Allow clock setting on MPC866/MPC885 series chips according to
  environment variable `cpuclk'

* Patch by Yuli Barcohen, 20 Apr 2004:
  Remove unnecessary redefine of CPM_DATAONLY_SIZE for MPC826x

* Patch by Sascha Hauer, 28 Jun:
  - add generic support for Motorola i.MX architecture
  - add support for mx1ads, mx1fs2 and scb9328 boards

* Patches by Marc Leeman, 23 Jul 2004:
  - Add define for the PCI/Memory Buffer Configuration Register
  - corrected comments in cpu/mpc824x/cpu_init.c

* Add support for multiple serial interfaces
  (for example to allow modem dial-in / dial-out)

Completion of the 8540ADS/8560ADS updates:
Fix some PCI and Rapid I/O memory maps,
Initialize both TSEC 1 and 2,
Initialize SDRAM
Update MAINTAINER for 85xx boards and README.mpc85xxads

  - fix problems with examples/stubs.c for GCC >= 3.4
  - fix problems with gd initialization

* Enable FAT filesystem support for HMI10 board

Using external watchdog for KUP4 boards in mpc8xx/cpu.c;
load_sernum_ethaddr() for KUP4 boards in lib_ppc/board.c;
various changes to KUP4 board specific files

binary image for all clock frequencies. Implement run-time
optimization of flash access timing based on the actual bus
frequency.

  - Add support for RPC/STx GP3, Motorola 8560 board
  - Update 85xx TSEC driver so it searches MII for first available PHY
    and uses that one.
  - Add functions to support console MII commands.

* Patch by Tolunay Orkun, 07 Apr 2004:
  Move  initialization of bi_iic_fast[]
  from board_init_f() to board_init_r()

* Patch by Yasushi Shoji, 07 Apr 2004:
  Cleanup microblaze port

* Patch by Sangmoon Kim, 07 Apr 2004:
  Add auto SDRAM module detection for Debris board

  - add auto-complete support to the U-Boot CLI
  - add support for NETTA and NETPHONE boards; fix NETVIA board

* Patch by Yuli Barcohen, 28 Mar 2004:
  - Add support for MPC8272 family including MPC8247/8248/8271/8272
  - Add support for MPC8272ADS evaluation board (another flavour of MPC8260ADS)
  - Change configuration method for MPC8260ADS family

  unconfiguring the board

* Adapt RMU board for bigger flash memory

* Test fix for ethernet problems on MPC5200

  Add support for KUP4X Board

  - Unify video mode handling for Chips & Technologies 69000 Video
    chip and Silicon Motion SMI 712/710/810 Video chip
  - Add selection of the video output (CRT or LCD) via 'videoout'
    environment variable for the Silicon Motion
  - README update

* Patch by Pierre Aubert, 18 Mar 2004:
  include/common.h typo fix

* Patches by Tolunay Orkun, 17 Mar 2004:
  - Add support for bd->bi_iic_fast[] initialization via environment
    variable "i2cfast" (CONFIG_I2CFAST)
  - Add "i2cfast" u-boot environment variable support for csb272

  avoid dereferencing NULL pointer in lib_arm/armlinux.c

* Patch by Stephen Williams, 15 Mar 2004:
  Fix CONFIG_SERIAL_SOFTWARE_FIFO documentation

* Patch by Tolunay Orkun, 15 Mar 2004:
  Initialize bi_opbfreq to real OPB frequency via get_OPB_freq()

* Patch by Travis Sawyer, 15 Mar 2004:
  Update CREDITS & MAINTAINERS files for PPC440GX & Ocotea port

  add IDE support for MPC5200

* Patch by Masami Komiya, 26 Feb 2004:
  add autoload via NFS

* Patch by Stephen Williams
  Use of CONFIG_SERIAL_SOFTWARE_FIFO in board.c consistent with uses
  elsewhere in the source.