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Explain why wbinv_all is SMP-safe in this case, and add a missing l2 cache

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flush.  (Either it was missing here, or it isn't needed in the minidump
case.  Adding it here seems like the safer path to consistancy.)
This commit is contained in:
Ian Lepore 2014-04-27 20:26:15 +00:00
parent fa046341af
commit f62cbe0e49
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=265025
1 changed files with 7 additions and 1 deletions
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8
sys/arm/arm/dump_machdep.c
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@ -174,8 +174,14 @@ cb_dumpdata(struct md_pa *mdp, int seqnr, void *arg)
printf(" chunk %d: %dMB (%d pages)", seqnr, pgs * PAGE_SIZE / (
1024*1024), pgs);
/* Make sure we write coherent datas. */
/*
* Make sure we write coherent data. Note that in the SMP case this
* only operates on the L1 cache of the current CPU, but all other CPUs
* have already been stopped, and their flush/invalidate was done as
* part of stopping.
*/
cpu_idcache_wbinv_all();
cpu_l2cache_wbinv_all();
#ifdef __XSCALE__
xscale_cache_clean_minidata();
#endif