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Fix obvious bug: missing `return'. 

viking_flush: make sure to really expunge all entries in a cache bucket
by poking it (2 * `associativity' - 1) times; noted by Chris Torek.
This commit is contained in:
pk 1997-04-11 20:06:53 +00:00
parent 5eccdd69a6
commit b153a134ce
1 changed files with 12 additions and 11 deletions
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23
sys/arch/sparc/sparc/cache.c
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@ -1,4 +1,4 @@
/* $NetBSD: cache.c,v 1.25 1997/03/27 16:02:10 pk Exp $ */
/* $NetBSD: cache.c,v 1.26 1997/04/11 20:06:53 pk Exp $ */
/*
* Copyright (c) 1996
@ -660,17 +660,24 @@ viking_pcache_flush_line(va, pa)
int i;
char *v;
/*
* Construct a virtual address that hits the same cache line
* as VA, then read from 2*ASSOCIATIVITY-1 different physical
* locations (all different from PA).
*/
if (CACHEINFO.c_enabled == 0) {
/*XXX - consult PROM early in autoconf? */
cshift = 5;
cmask = (4096 << cshift) - 1;
cmask = (128 << cshift) - 1;
v = (char *)roundup((int)etext, NBPG) +
(((va & cmask) >> cshift) << cshift);
i = 5;
i = 7;
while (i--) {
(*(volatile int *)v);
v += NBPG;
}
return;
}
if (base == 0) {
@ -679,14 +686,8 @@ viking_pcache_flush_line(va, pa)
base = (char *)roundup((int)etext, NBPG);
}
/*
* Construct a virtual address that hits the same cache line
* as VA, then read from ASSOCIATIVITY different physical
* locations (all different from PA).
*/
v = base + (((va & cmask) >> cshift) << cshift);
i = CACHEINFO.dc_associativity;
i = CACHEINFO.dc_associativity * 2 - 1;
while (i--) {
(*(volatile int *)v);
@ -705,6 +706,6 @@ cypress_pcache_flush_line(va, pa)
*/
/* NOT YET IMPLEMENTED */
/*srmmu_vcache_flush_page(va & ~(NBPG - 1));*/
sta(va, ASI_IDCACHELFP, 0);
}
#endif /* SUN4M */