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pmap_deactivate(): only update the pmap's cpuset if need to.

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This commit is contained in:
pk 2003-01-17 14:15:17 +00:00
parent f843b3302c
commit d352e8ce9c
1 changed files with 13 additions and 13 deletions
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26
sys/arch/sparc/sparc/pmap.c
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@ -1,4 +1,4 @@
/* $NetBSD: pmap.c,v 1.229 2003/01/14 13:56:07 pk Exp $ */
/* $NetBSD: pmap.c,v 1.230 2003/01/17 14:15:17 pk Exp $ */
/*
* Copyright (c) 1996
@ -7147,7 +7147,7 @@ void
pmap_activate(p)
struct proc *p;
{
pmap_t pmap = p->p_vmspace->vm_map.pmap;
pmap_t pm = p->p_vmspace->vm_map.pmap;
int s;
/*
@ -7160,18 +7160,18 @@ pmap_activate(p)
s = splvm();
if (p == curproc) {
write_user_windows();
if (pmap->pm_ctx == NULL) {
ctx_alloc(pmap); /* performs setcontext() */
if (pm->pm_ctx == NULL) {
ctx_alloc(pm); /* performs setcontext() */
} else {
/* Do any cache flush needed on context switch */
(*cpuinfo.pure_vcache_flush)();
setcontext(pmap->pm_ctxnum);
setcontext(pm->pm_ctxnum);
}
}
#if defined(MULTIPROCESSOR)
if (pmap != pmap_kernel())
PMAP_SET_CPUSET(pmap, &cpuinfo);
if (pm != pmap_kernel())
PMAP_SET_CPUSET(pm, &cpuinfo);
#endif
}
splx(s);
}
@ -7183,15 +7183,15 @@ pmap_deactivate(p)
struct proc *p;
{
#if defined(MULTIPROCESSOR)
pmap_t pmap;
pmap_t pm;
if (p && p->p_vmspace &&
(pmap = p->p_vmspace->vm_map.pmap) != pmap_kernel()) {
if (pmap->pm_ctx)
sp_tlb_flush(0, pmap->pm_ctxnum, ASI_SRMMUFP_L0);
(pm = p->p_vmspace->vm_map.pmap) != pmap_kernel()) {
if (pm->pm_ctx && CPU_HAS_SRMMU)
sp_tlb_flush(0, pm->pm_ctxnum, ASI_SRMMUFP_L0);
/* we no longer need broadcast tlb flushes for this pmap. */
PMAP_CLR_CPUSET(pmap, &cpuinfo);
PMAP_CLR_CPUSET(pm, &cpuinfo);
}
#endif
}