Blackfin: remove useless and outdated documentation

The filesystem and cache files duplicate existing & better documents, and
these contain outdated information.  So punt them.
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

Documentation/blackfin/00-INDEX

 00-INDEX
 	- This file
 
-cachefeatures.txt
-	- Supported cache features.
-
-Filesystems
-	- Requirements for mounting the root file system.
-
 bfin-gpio-note.txt
 	- Notes in developing/using bfin-gpio driver.

Documentation/blackfin/Filesystems

-/*
- * File:         Documentation/blackfin/Filesystems
- * Based on:
- * Author:
- *
- * Created:
- * Description:  This file contains the simple DMA Implementation for Blackfin
- *
- * Rev:          $Id: Filesystems 2384 2006-11-01 04:12:43Z magicyang $
- *
- * Modified:
- *               Copyright 2004-2006 Analog Devices Inc.
- *
- * Bugs:         Enter bugs at http://blackfin.uclinux.org/
- *
- */
-
-		How to mount the root file system in uClinux/Blackfin
-		-----------------------------------------------------
-
-1	Mounting EXT3 File system.
-	------------------------
-
-	Creating an EXT3 File system for uClinux/Blackfin:
-
-
-Please follow the steps to form the EXT3 File system and mount the same as root
-file system.
-
-a	Make an ext3 file system as large as you want the final root file
-	system.
-
-		mkfs.ext3  /dev/ram0 <your-rootfs-size-in-1k-blocks>
-
-b	Mount this Empty file system on a free directory as:
-
-		mount -t ext3 /dev/ram0  ./test
-			where ./test is the empty directory.
-
-c	Copy your root fs directory that you have so carefully made over.
-
-		cp -af  /tmp/my_final_rootfs_files/* ./test
-
-		(For ex: cp -af uClinux-dist/romfs/* ./test)
-
-d	If you have done everything right till now you should be able to see
-	the required "root" dir's (that's etc, root, bin, lib, sbin...)
-
-e	Now unmount the file system
-
-		umount  ./test
-
-f	Create the root file system image.
-
-		dd if=/dev/ram0 bs=1k count=<your-rootfs-size-in-1k-blocks> \
-		> ext3fs.img
-
-
-Now you have to tell the kernel that will be mounting this file system as
-rootfs.
-So do a make menuconfig under kernel and select the Ext3 journaling file system
-support under File system --> submenu.
-
-
-2.	Mounting EXT2 File system.
-	-------------------------
-
-By default the ext2 file system image will be created if you invoke make from
-the top uClinux-dist directory.
-
-
-3.	Mounting CRAMFS File System
-	----------------------------
-
-To create a CRAMFS file system image execute the command
-
-	mkfs.cramfs ./test cramfs.img
-
-	where ./test is the target directory.
-
-
-4.	Mounting ROMFS File System
-	--------------------------
-
-To create a ROMFS file system image execute the command
-
-	genromfs -v -V "ROMdisk" -f romfs.img -d ./test
-
-	where ./test is the target directory
-
-
-5.	Mounting the JFFS2 Filesystem
-	-----------------------------
-
-To create a compressed JFFS filesystem (JFFS2), please execute the command
-
-	mkfs.jffs2 -d ./test -o jffs2.img
-
-	where ./test is the target directory.
-
-However, please make sure the following is in your kernel config.
-
-/*
- * RAM/ROM/Flash chip drivers
- */
-#define CONFIG_MTD_CFI 1
-#define CONFIG_MTD_ROM 1
-/*
- * Mapping drivers for chip access
- */
-#define CONFIG_MTD_COMPLEX_MAPPINGS 1
-#define CONFIG_MTD_BF533 1
-#undef CONFIG_MTD_UCLINUX
-
-Through the u-boot boot loader, use the jffs2.img in the corresponding
-partition made in linux-2.6.x/drivers/mtd/maps/bf533_flash.c.
-
-NOTE - 	Currently the Flash driver is available only for EZKIT. Watch out for a
-	STAMP driver soon.
-
-
-6. 	Mounting the NFS File system
-	-----------------------------
-
-	For mounting the NFS please do the following in the kernel config.
-
-	In Networking Support --> Networking options --> TCP/IP networking -->
-		IP: kernel level autoconfiguration
-
-	Enable BOOTP Support.
-
-	In Kernel hacking --> Compiled-in kernel boot parameter add the following
-
-		root=/dev/nfs rw ip=bootp
-
-	In File system --> Network File system, Enable
-
-		NFS file system support --> NFSv3 client support
-		Root File system on NFS
-
-	in uClibc menuconfig, do the following
-	In Networking Support
-		enable Remote Procedure Call (RPC) support
-			Full RPC Support
-
-	On the Host side, ensure that /etc/dhcpd.conf looks something like this
-
-		ddns-update-style ad-hoc;
-		allow bootp;
-		subnet 10.100.4.0 netmask 255.255.255.0 {
-		default-lease-time 122209600;
-		max-lease-time 31557600;
-		group {
-			host bf533 {
-				hardware ethernet 00:CF:52:49:C3:01;
-				fixed-address 10.100.4.50;
-				option root-path "/home/nfsmount";
-			}
-		}
-
-	ensure that /etc/exports looks something like this
-		/home/nfsmount *(rw,no_root_squash,no_all_squash)
-
-	 run the following commands as root (may differ depending on your
-	 distribution) :
-		-  service nfs start
-		-  service portmap start
-		-  service dhcpd start
-		-  /usr/sbin/exportfs

Documentation/blackfin/cachefeatures.txt

-/*
- * File:         Documentation/blackfin/cachefeatures.txt
- * Based on:
- * Author:
- *
- * Created:
- * Description:  This file contains the simple DMA Implementation for Blackfin
- *
- * Rev:          $Id: cachefeatures.txt 2384 2006-11-01 04:12:43Z magicyang $
- *
- * Modified:
- *               Copyright 2004-2006 Analog Devices Inc.
- *
- * Bugs:         Enter bugs at http://blackfin.uclinux.org/
- *
- */
-
-	- Instruction and Data cache initialization.
-		icache_init();
-		dcache_init();
-
-	-  Instruction and Data cache Invalidation Routines, when flushing the
-	   same is not required.
-		_icache_invalidate();
-		_dcache_invalidate();
-
-	Also, for invalidating the entire instruction and data cache, the below
-	routines are provided (another method for invalidation, refer page no 267 and 287 of
-	ADSP-BF533 Hardware Reference manual)
-
-		invalidate_entire_dcache();
-		invalidate_entire_icache();
-
-	-External Flushing of Instruction and data cache routines.
-
-		flush_instruction_cache();
-		flush_data_cache();
-
-	- Internal Flushing of Instruction and Data Cache.
-
-		icplb_flush();
-		dcplb_flush();
-
-	- Miscellaneous cache functions.
-
-		flush_cache_all();
-		flush_cache_mm();
-		invalidate_dcache_range();
-		flush_dcache_range();
-		flush_dcache_page();
-		flush_cache_range();
-		flush_cache_page();
-		invalidate_dcache_range();
-		flush_page_to_ram();
-