export functions

Add register_command() to register a command in runtime. This ...

is only needed when modules are enabled, so the change is inside
"#ifdef CONFIG_MODULE"

declare lots of functions static

remove u-boot command paramter flag

- teach hush to honour PATH variable ...

- remove common/main.c. This is now handled in the different shells.

- putc is now putchar for better standard conformity ...

- make printf return int

svn_rev_701 ...

move do_test to own file and reimplement

svn_rev_571 ...

add line break to help messages

svn_rev_481 ...

make more char * const, fix compiler warnings

svn_rev_462 ...

- Add help texts for many commands.
- Let the linker sort the command table.
- Add support for multiple argmuments in several commands
  (mkdir, rmdir, rm, cat)

svn_rev_459

svn_rev_420 ...

- do more POSIX:
  - use DIR instead of struct dirent
  - use (struct dirent)->d_name instead of (struct dirent)->name
- switch to a new layout for U_BOOT_CMD:
  - use C99 initializers to be able to add more fields to the
    command struct
  - add aliases for commands (needed mainly for help -> ? and test -> [
  - This is not done for all commands yet, but the compiler will tell you ;)

svn_rev_375 ...

add readline, true, false commands

svn_rev_316 ...

make help command removable

svn_rev_207 ...

move several config options to kconfig

svn_rev_135 ...

CFG_CMD_ECHO -> CONFIG_CMD_ECHO

svn_rev_003 ...

remove all #if 0 and #if 1

Adjust "echo" as a default command ...

Patch by Sam Song, 19 Jun 2005

* Patches by Robert Whaley, 29 Nov 2004: ...

- update the pxa-regs.h file for PXA27x chips
  - add PXA27x based ADSVIX board
  - add support for MMC on PXA27x processors

* Patch by Andrew E. Mileski, 28 Nov 2004:
  Fix PPC4xx SPD SDRAM detection bug

* Patch by Hiroshi Ito, 26 Nov 2004:
  Fix logic of "test -z" and "test -n" commands

* Cleanup, minor fixes ...

* Patch by Rune Torgersen, 16 Apr 2004:
  LBA48 fixes

* Patches by Pantelis Antoniou, 16 Apr 2004:
  - Fix some compile problems;
    add "once" functionality for the netretry variable

Patches by Pantelis Antoniou, 16 Apr 2004: ...

- add support for a new version of an Intracom board and fix
  various other things on others.
- add verify support to the crc32 command (define
  CONFIG_CRC32_VERIFY to enable it)
- fix FEC driver for MPC8xx systems:
  1. fix compilation problems for boards that use dynamic
     allocation of DPRAM
  2. shut down FEC after network transfers
- HUSH parser fixes:
  1. A new test command was added. This is a simplified version of
     the one in the bourne shell.
  2. A new exit command was added which terminates the current
     executing script.
  3. Fixed handing of $? (exit code of last executed command)

* Patches by Pantelis Antoniou, 30 Mar 2004: ...

- 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

Patch by Kenneth Johansson, 30 Jun 2003: ...

get rid of MK_CMD_ENTRY macro; update doc/README.command

Fix some missing commands, cleanup header files ...

(autoscript, bmp, bsp, fat, mmc, nand, portio, ...)

Rewrite command lookup and help command (fix problems with bubble ...

sort when sorting command name list). Minor cleanup here and there.

* Code cleanup: ...

- remove trailing white space, trailing empty lines, C++ comments, etc.
  - split cmd_boot.c (separate cmd_bdinfo.c and cmd_load.c)

* Patches by Kenneth Johansson, 25 Jun 2003:
  - major rework of command structure
    (work done mostly by Michal Cendrowski and Joakim Kristiansen)

* Fix CONFIG_NET_MULTI support in include/net.h ...

* Patches by Kyle Harris, 13 Mar 2003:
  - Add FAT partition support
  - Add command support for FAT
  - Add command support for MMC
  ----
  - Add Intel PXA support for video
  - Add Intel PXA support for MMC
  ----
  - Enable MMC and FAT for lubbock board
  - Other misc changes for lubbock board

* Add support for RMU board ...

* Add support for TQM862L at 100/50 MHz

* Patch by Pantelis Antoniou, 02 Jun 2003:
  major reconstruction of networking code;
  add "ping" support (outgoing only!)

* Patch by Marc Singer, 29 May 2003: ...

Fixed rarp boot method for IA32 and other little-endian CPUs.

* Patch by Marc Singer, 28 May 2003:
  Added port I/O commands.

* Patch by Matthew McClintock, 28 May 2003
  - cpu/mpc824x/start.S: fix relocation code when booting from RAM
  - minor patches for utx8245

* Patch by Daniel Engström, 28 May 2003:
  x86 update

* Patch by Dave Ellis, 9 May 2003 + 27 May 2003:
  add nand flash support to SXNI855T configuration
  fix/extend nand flash support:
  - fix 'nand erase' command so does not erase bad blocks
  - fix 'nand write' command so does not write to bad blocks
  - fix nand_probe() so handles no flash detected properly
  - add doc/README.nand
  - add .jffs2 and .oob options to nand read/write
  - add 'nand bad' command to list bad blocks
  - add 'clean' option to 'nand erase' to write JFFS2 clean markers
  - make NAND read/write faster

* Patch by Rune Torgersen, 23 May 2003:
  Update for MPC8266ADS board

* Make sure Block Lock Bits get cleared in R360MPI flash driver ...

* MPC823 LCD driver: Fill color map backwards, to allow for steady
  display when Linux takes over

* Patch by Erwin Rol, 27 Feb 2003:
  Add support for RTEMS (this time for real).

* Add support for "bmp info" and "bmp display" commands to load
  bitmap images; this can be used (for example in a "preboot"
  command) to display a splash screen very quickly after poweron.

* Add support for 133 MHz clock on INCA-IP board