Messages in this thread | | | Date | Wed, 22 Jun 2005 14:58:18 -0700 | From | Eugene Surovegin <> | Subject | Re: [PATCH] ppc32: Add support for Freescale e200 (Book-E) core |
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On Wed, Jun 22, 2005 at 03:41:09PM -0500, Kumar Gala wrote:
[snip]
> +#ifdef CONFIG_E200 > +#define DEBUG_EXCEPTION \ > + START_EXCEPTION(Debug); \ > + DEBUG_EXCEPTION_PROLOG; \ > + \ > + /* \ > + * If there is a single step or branch-taken exception in an \ > + * exception entry sequence, it was probably meant to apply to \ > + * the code where the exception occurred (since exception entry \ > + * doesn't turn off DE automatically). We simulate the effect \ > + * of turning off DE on entry to an exception handler by turning \ > + * off DE in the CSRR1 value and clearing the debug status. \ > + */ \ > + mfspr r10,SPRN_DBSR; /* check single-step/branch taken */ \ > + andis. r10,r10,DBSR_IC@h; \ > + beq+ 2f; \ > + \ > + lis r10,KERNELBASE@h; /* check if exception in vectors */ \ > + ori r10,r10,KERNELBASE@l; \
I think we can get rid of one instruction here :)
-- Eugene
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