Alan Wu wrote:
I'm porting 2.6.26 Linux on the platform of MIPS 34K. Currently, the uni-processor
kernel model(1 VPE) and SMP model (2 VPE) are up and work perfectly.
Now, I need to port the AP/SP model on a normal Linux uniprocessor kernel model.
I'd like to load an application program (ELF ?) into kernel space where this
application will run on a Secondary VPE undisturbed by the Linux kernel.
After I enabled the MIPS_VPE_LOADER [=y] in .config , the kernel is up without
any error/warning message.
Please help :
1. How to load the application into VPE1 from VPE0 ? (cat XYZapp >/dev/vpe1 ?)
If I recall correctly, yes that's it.
2. Is there any sample "Hello World" application for this ?
3. Any specific tool chain needed ?
There was a sort of tool kit distributed by MIPS that provided examples,
a minimal C runtime library, and tool settings for AP/SP (aka APRP).
The binaries are ELF, but they aren't linked the way you'd link a
userland program (they either need to be relocatable, or be linked to
load at an appropriately high kernel segment address) and of course they
can't use standard C libraries that do system calls, though there is the
provision for open/close/read/write of files and devices via a Linux
kernel server. I'm no longer working for MIPS, so I don't have my copy
anymore, but I'd like to think that you could find a pointer to the tool
kit and documentation somewhere on MIPS's web site. And, as Ralf
suggested (after I'd started typing this message, but before I got to
the point of sending it) if you are a MIPS customer, or are a
subcontractor to one, MIPS customer support should definitely be able to
get you the necessary tool kit.