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target-ppc: Explain why the whole TLB is flushed on SR write 

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6947 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aurel32 2009-03-29 13:36:32 +00:00
parent 004efc967b
commit bf1752ef58
1 changed files with 2 additions and 0 deletions
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2
target-ppc/helper.c
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@ -2009,6 +2009,8 @@ void ppc_store_sr (CPUPPCState *env, int srnum, target_ulong value)
#endif #endif
if (env->sr[srnum] != value) { if (env->sr[srnum] != value) {
env->sr[srnum] = value; env->sr[srnum] = value;
/* Invalidating 256MB of virtual memory in 4kB pages is way longer than
flusing the whole TLB. */
#if !defined(FLUSH_ALL_TLBS) && 0 #if !defined(FLUSH_ALL_TLBS) && 0
{ {
target_ulong page, end; target_ulong page, end;