Add MVME550 BSP

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diff --git a/c/src/lib/libbsp/powerpc/mvme5500/README.booting b/c/src/lib/libbsp/powerpc/mvme5500/README.booting
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+README.booting: written by S. Kate Feng <feng1@bnl.gov>, 2004/10/11
+
+The bootloader is adapted from Till Straumann's Generic Mini-loader,
+which he wrote originally for the SVGM powerpc board. Part of the
+BSP was derived from the "RTEMS-PowerPC BSPs" and the NetBSD projects.
+As of today, the BSP is built and tested on the RTEMS-4.6.0
+release with small patches I added (see README.rtems-4.6.0-patch
+and rtems-4.6.0-patch/ directory).
+
+
+Booting requirement :
+-------------------------
+
+1) One needs to setup BOOTP/DHCP and TFTP servers and /etc/bootptab
+   properly to boot the system.  (Note : EPICS needs a NTP server).
+ 
+2) Please copy the prebuilt RTEMS binary (e.g. misc/rtems5500-cexp.bin)
+   and perhaps others (e.g. misc/st.sys) to the /tftpboot/epics/hostname/bin/
+   directory or the TFTPBOOT one you specified in the 'tftpGet'
+   command of the boot script (as shown in the following example).
+
+3) Example of the boot script setup carried out on the MOTLoad 
+   command line : 
+
+MVME5500> gevEdit mot-script-boot
+(Blank line terminates input.)
+tftpGet -a4000000 -cxx.xx.xx.xx -sxx.xx.xx.xx -m255.255.254.0 -d/dev/enet0 -fepics/hostname/bin/rtems5500-cexp.bin
+netShut
+go -a4000000
+
+
+Update Global Environment Area of NVRAM (Y/N) ? Y
+MVME5500>
+
+Note : (cxx.xx.xx.xx is the client IP address and 
+        sxx.xx.xx.xx is the server IP address)
+
+4) Other reference web sites:
+http://lansce.lanl.gov/EPICS/presentations/KateFeng%20RTEMS-mvme55001.ppt
+
+5) When generating code (especially C++) for this system, one should
+   use at least gcc-3.2 (preferrably a copy downloaded from the RTEMS
+   site [snapshot area] )
+
+6) To reboot the RTEMS-MVME5500 (board reset), one can invoke the
+   rtemsReboot() command at Cexp> prompt.
+ 
+7) Please reference http://www.slac.stanford.edu/~strauman/rtems
+for the source code and installation guidance of cexp, GeSys and
+other useful utilities such as telnet, nfs, and so on. 
+
+8) To get started with RTEMS/EPICS and to build development
+tools and BSP, I would recommend one to reference
+http://www.aps.anl.gov/epics/base/RTEMS/tutorial/
+in additional to the RTEMS document.
+
+
+TODO lists:
+1) 1 GHZ ethernet ( work in progress, to be released soon)
+2) To measure the interrupt latency and context switching.
+3) To implement the watchdog timer.
+