On Fri, Nov 16, 2012 at 07:25:53PM +0000, Gregory CLEMENT wrote: > On 11/16/2012 07:56 PM, Will Deacon wrote: > > > > The code paths are fine, I would just like to see less duplication. Can you > > make the asm function PCS compliant and call it from C for the primary > > (setting the link register to secondary_startup for the secondary cores)? > > Have you a pointer on how to do it (make the asm function PCS compliant)?
Take a look at the PCS document: http://infocenter.arm.com/help/topic/com.arm.doc.ihi0042d/IHI0042D_aapcs.pdf For your case it's really simple though as you don't need to use the stack: just take the base address in r0 and use a subset of r1-r3 for temporaries while setting up the control registers. Then mov pc, lr at the end. > I will also need to add a parameter, because the base address are not the > same between primary CPU and secondary CPUS. With the first we use virtual > address whereas with the second the physical address. Should be simple enough to add a secondary entry point immediately before, which initialises r0 and lr. Will _______________________________________________ devicetree-discuss mailing list [email protected] https://lists.ozlabs.org/listinfo/devicetree-discuss
