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Subject: Re: Flushing the d-cache (was Re: BFD relocations)
From: Philip Blundell <pb@nexus.co.uk>
To: Camm Maguire <camm@enhanced.com>
Cc: Daniel Jacobowitz <drow@mvista.com>, Paul Koning <pkoning@equallogic.com>, 
	binutils@sources.redhat.com, gcl-devel@gnu.org, roman@hodek.net, 
	debian-68k@lists.debian.org, debian-arm@lists.debian.org
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Date: Fri, 14 Jun 2002 09:16:00 -0000
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X-SW-Source: 2002-06/txt/msg00463.txt.bz2

On Fri, 2002-06-14 at 16:51, Camm Maguire wrote:
> #define CLEAR_CACHE do {\
>   void *v=memory->cfd.cfd_start,*ve=v+memory->cfd.cfd_size; \
>   for (;v<ve;v+=16)   {   \
>        register unsigned long _beg __asm ("a1") = (unsigned long)(v);	\
>        register unsigned long _end __asm ("a2") = (unsigned long)(v+16);\
>        register unsigned long _flg __asm ("a3") = 0;			\
>        __asm __volatile ("swi 0x9f0002		@ sys_cacheflush"	\
> 		    : /* no outputs */					\
> 		    : /* no inputs */					\
> 		    : "a1");						\
>        }\

You don't need the loop.  The arm sys_cacheflush can be given arbitrary
regions, it works the cache line size out for itself.

p.