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authorwdenk <wdenk>2003-04-08 23:25:21 +0000
committerwdenk <wdenk>2003-04-08 23:25:21 +0000
commit60fbe254243ec461ec73da13132be098db33d3fa (patch)
treeaf82977065ec5f1fdea17bd1056395005d652d24 /doc/README.Purple
parent3e38691e8f7aa0d9b498d76c7279ddec6e4946f3 (diff)
downloadu-boot-linaro-stable-60fbe254243ec461ec73da13132be098db33d3fa.tar.gz
Prepare for 0.3.0 releaseU-Boot-0_3_0
* Add support for Purple Board (MIPS64 5Kc) * Add support for MIPS64 5Kc CPUs
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+Installation Instructions:
+--------------------------
+
+1. Put the s2 switch into the following position:
+
+ 1 0
+ ------
+ |x |
+ | x|
+ |x |
+ | X|
+ ------
+
+2. Connect to the serial console and to the BDI. Power on. On the
+ serial line, you should see:
+
+ PURPLE@1.2>
+
+3. Type '8'. No echo will be displayed. In response, you should get:
+
+ 7A(pass)
+
+4. From BDI, enter command:
+
+ mmw 0xb800d860 0x0042c7ff
+
+5. Then, from BDI:
+
+ erase 0xB0000000
+ erase 0xB0008000
+ erase 0xB000C000
+ erase 0xB0010000
+ erase 0xB0020000
+
+ prog 0xB0000000 <u-boot.bin> bin
+
+6. Power off. Restore the original S2 switch position. Power on.
+ U-Boot should come up.
+
+
+
+Implementation Notes:
+---------------------
+
+Due to the RAM/flash bus arbitration problem the suggested workaround
+had to be implemented. It works okay. On the downside is that you
+can't really check whether 'erase' is complete by polling flash as it
+is usually done. Instead, the flash driver simply waits for a given
+time and assumes that erase then has passed. This behaviour is
+identical to what the VxWorks driver does; also, the same timeout (6
+seconds) was chosen. Note that this timeout applies for each errase
+operation, i. e. per erased sector.