[U-Boot-Users] U-Boot on MPC8280

[Wolfgang Denk]

In message <0E8A20F2EB7BD7119C1F00508BB333780E5D78 at tmservermail02.t-modus.nec.co.uk> you wrote:
> 
> I have seen several posts by Wolfgang giving a poor opinion (to put it
> mildly) of the Vision Probe.  However, it is worth noting that Wind
> River announced in late 2003 that Vision Probe now supports Linux.  So I
> guess they now properly support the MMU etc.  But I can't get much
> information about it from Wind River.  Has anyone tried the new version?

AFAIK they are still limited to a static mapping.


If you check the PowerPC Linux kernel you will find:

"arch/ppc/kernel/head.S":
	...
#ifdef CONFIG_BDI_SWITCH
	/* Add helper information for the Abatron bdiGDB debugger.
	 * ...
#endif
	...
#ifdef CONFIG_BDI_SWITCH
        /* Context switch the PTE pointer for the Abatron BDI2000.
	 * The PGDIR is passed as second argument.
	 */
	...
#endif


I. e. the kernel provides special hooks to update the BDI's knwoledge
about page table use. This is at least an indication that the BDI2000
is not only well supported by the Linux kernel, but  also  the  first
commercial debugger that provided and received such support.

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd at denx.de
I have a very small mind and must live with it.    -- Edsger Dijkstra