To: u-boot-users@lists.sourceforge.net Subject: Re: [U-Boot-Users] How do I boot VxWorks (6.3) image with u-boot1.1.3 :: mkimage entry point and address ?
Chaffin, Michael wrote:
I have a working system, PowerPC embedded in Xilinx Virtex II Pro, that does boot into Linux using u-boot 1.1.3; but I need to load a VxWorks (6.3) image and boot from that. I have read thedocumentation, but I don't know what my entry point for mkimage to use, sysInit( )? What should my load address be?
You have to pass as address the entry point of the vxworks kernel. On my PPC405 board I had no problem with the following steps I have in my config.h a RAM_LOW_ADRS = 00010000 ;
I quick check and I have the same value for 'RAM_LOW_ADRS'; a quick search of the executable vxworks with objdump turns up $ objdump -x ./vxWorks | grep -A 2 -B 2 _sysInit 0006242c g F .text 0000022c soaccept 0008b4f0 g F .text 00000078 tyDevTerminate 00010000 g .text 00000000 _sysInit 00025050 g F .text 00000014 islower 00091ac8 g F .text 00000020 dllCount
So sysInit( ) is at 0x00010000
I did no call mkImage for my vxWorks (5.5.1), but copied it directly into the ram at an address which does not conflict with my RAM_LOW_ADRS e.g. loadb 0x00200000 then I call bootm 0x00010000 ;
Ok ... Here we go with executing the program with /no/ mkimage..
=> loadb 0x00200000 ## Ready for binary (kermit) download to 0x00200000 at 115200 bps... ## Total Size = 0x000e09b6 = 919990 Bytes ## Start Addr = 0x00200000 => => => => => bootm 0x00200000 ## Booting image at 00200000 ... Image Name: vxWorks3.msc Image Type: PowerPC VxWorks Kernel Image (uncompressed) Data Size: 919926 Bytes = 898.4 kB Load Address: 00000000 Entry Point: 00100000 Verifying Checksum ... OK OK <Same Result>
On the Yosemite PPC440EP evaluation board, my vxWorks (6.3) hangs too. I had not yet a chance to figure out why, but I think there might be some differences into how the HW is mapped into the memory space.
Best regards
Thanks for the help, I think I will try Stefan Roese's suggestion of 'bootvx'; maybe it will help you with your Yosemite board?
Niklaus Giger