On Tue, 16 Nov 2010 11:34:43 +0100 Wolfgang Denk wd@denx.de wrote:
Dear Shaohui Xie,
In message 1289897403-24602-1-git-send-email-b21989@freescale.com you wrote:
+The P4080 is capable of booting from SPI. The bootup process can be divided into +two stages: the first stage will load RCW and write configuration registers to +initialize SPI interface, and configure one CPC as 1M SRAM, and loads U-boot image +to CPC. The second stage will configure all the hardware and boot up to U-Boot +command line.
+The PBL image contains three parts, the first is RCW, the second is PBI commands +performs configuration registers write, the third is the 512KB u-boot image. The +PBL image is produced by tool pbl_image_tool.html.
Please explain abbreviations. What's PBI? CPC?
PBI is pre-boot initialization.
CPC is corenet platform cache -- a.k.a. L3 cache.
What is "pbl_image_tool.html"? I doubt that a HTML page can be used as tool?
The html file contains a javascript-based tool.
And where can this tool be found? And why is it not part of the U-Boot distribution?
It *may* be bundled with the BSP -- not sure.
It would be really nice if it were made generally available, though I don't know if there are any plans for that. Certainly we shouldn't be referring users towards it if it's not publicly available.
+1. Producing RCW +Copy RCW of u-boot dump and paste it to tab "Tools" of the tool and choose +"Boot" and change PBI_SRC to "0b0101 - SPI 24b Addressing", change BOOT_LOC to
You really mean one has to go to some web page and manually copy and paste information there?
To build some image?
May I ask how you do automatic regression testing?
We usually use xxd to turn a hex dump of an RCW into a binary. You only need the tool if you want something interactive to make changes to the RCW.
The problem with providing such a hexdump here is that it would contain other settings that may not be appropriate for the board's configuration. RCWs on p4080 are a lot more complicated than on older chips; it's no longer practical to embed a near-universal default RCW in the U-Boot build.
+2. Producing ACS File
What is ACS?
Don't know, I don't even have a reference to that in my copy of the RCW tool. :-P
- make P4080DS_PBL_BOOT_INDIRECT_config
- make CROSS_COMPILE=powerpc-none-linux-gnuspe- all
- xxd u-boot.bin > u-boot.xxd
+3. Producing PBI commands +Switch to tab "PBI" and paste commands below into text field (please note these +commands are for CPC1 used as SRAM only, change corresponding register setting +if CPC2 need to be used as SRAM), then choose "ACS File (XXD Object Dump)", +change Offset to "f80000", and click "Browse" to select the u-boot.xxd file +produced in step 2, and click "Add PBI Data", after it finished, paste +"09138000 00000000" and "091380c0 00000000" at the end.
This must be a bad joke.
Can you not provide a plain and simple AUTOMATIC way to get this result? some plain stupid command line tool? Something that works as a simple "make XXX" ? So it can be scripted / automatized / used?
Yes, a simple C tool to take an existing PBL or RCW dump and "espi-ize" it into a PBL dump would be nice. The user will still need to acquire the existing RCW manually. This only needs to be done once on a board; it's not part of building a U-Boot image.
-Scott