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Do partial lazy I-stream sync -- in the pmap_enter()/pmap_remove() cases

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for now.  More to come.
This commit is contained in:
thorpej 2000-03-01 18:29:04 +00:00
parent 89c2906ea5
commit 7d57276982
1 changed files with 46 additions and 39 deletions
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85
sys/arch/alpha/alpha/pmap.c
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@ -1,7 +1,7 @@
/* $NetBSD: pmap.c,v 1.126 2000/03/01 01:32:45 thorpej Exp $ */
/* $NetBSD: pmap.c,v 1.127 2000/03/01 18:29:04 thorpej Exp $ */
/*-
* Copyright (c) 1998, 1999 The NetBSD Foundation, Inc.
* Copyright (c) 1998, 1999, 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
@ -154,7 +154,7 @@
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.126 2000/03/01 01:32:45 thorpej Exp $");
__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.127 2000/03/01 18:29:04 thorpej Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -545,7 +545,7 @@ int pmap_physpage_delref __P((void *));
/* \
* XXX This test is not MP-safe. \
*/ \
int isactive_ = PMAP_ISACTIVE_TEST(pm); \
int isactive_ = PMAP_ISACTIVE_TEST(pm, cpu_id); \
\
if (curproc != NULL && curproc->p_vmspace != NULL && \
(isactive_ ^ ((pm) == curproc->p_vmspace->vm_map.pmap))) \
@ -631,6 +631,27 @@ do { \
} \
} while (0)
/*
* PMAP_SYNC_ISTREAM:
*
* Synchronize the I-stream for the specified pmap. For user
* pmaps, this is deferred until a process using the pmap returns
* to userspace.
*
* XXX Need MULTIPROCESSOR versions of these.
*/
#define PMAP_SYNC_ISTREAM_KERNEL() alpha_pal_imb()
#define PMAP_SYNC_ISTREAM_USER(pmap) (pmap)->pm_needisync = ~0UL
#define PMAP_SYNC_ISTREAM(pmap) \
do { \
if ((pmap) == pmap_kernel()) \
PMAP_SYNC_ISTREAM_KERNEL(); \
else \
PMAP_SYNC_ISTREAM_USER(pmap); \
} while (0)
/*
* PMAP_INVALIDATE_ASN:
*
@ -1322,12 +1343,8 @@ pmap_remove(pmap, sva, eva)
PMAP_UNLOCK(pmap);
PMAP_MAP_TO_HEAD_UNLOCK();
if (needisync) {
alpha_pal_imb();
#if defined(MULTIPROCESSOR) && 0
alpha_broadcast_ipi(ALPHA_IPI_IMB);
#endif
}
if (needisync)
PMAP_SYNC_ISTREAM_KERNEL();
return;
}
@ -1422,7 +1439,7 @@ pmap_remove(pmap, sva, eva)
pmap_l1pt_delref(pmap, saved_l1pte, cpu_id);
if (needisync)
alpha_pal_imb();
PMAP_SYNC_ISTREAM_USER(pmap);
out:
PMAP_UNLOCK(pmap);
@ -1462,12 +1479,12 @@ pmap_page_protect(pg, prot)
switch (prot) {
case VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE:
alpha_pal_imb();
alpha_pal_imb(); /* XXX XXX XXX */
case VM_PROT_READ|VM_PROT_WRITE:
return;
/* copy_on_write */
case VM_PROT_READ|VM_PROT_EXECUTE:
alpha_pal_imb();
alpha_pal_imb(); /* XXX XXX XXX */
case VM_PROT_READ:
pvh = pa_to_pvh(pa);
PMAP_HEAD_TO_MAP_LOCK();
@ -1592,14 +1609,8 @@ pmap_protect(pmap, sva, eva, prot)
}
}
if (prot & VM_PROT_EXECUTE) {
if (isactive)
alpha_pal_imb();
#if defined(MULTIPROCESSOR) && 0
if (pmap->pm_cpus & ~(1UL << cpu_id))
alpha_broadcast_ipi(ALPHA_IPI_IMB);
#endif
}
if (prot & VM_PROT_EXECUTE)
PMAP_SYNC_ISTREAM(pmap);
PMAP_UNLOCK(pmap);
}
@ -1908,12 +1919,8 @@ pmap_enter(pmap, va, pa, prot, flags)
pmap_tlb_shootdown(pmap, va, hadasm ? PG_ASM : 0);
#endif
}
if (needisync) {
alpha_pal_imb();
#if defined(MULTIPROCESSOR) && 0
alpha_broadcast_ipi(ALPHA_IPI_IMB);
#endif
}
if (needisync)
PMAP_SYNC_ISTREAM(pmap);
PMAP_UNLOCK(pmap);
PMAP_MAP_TO_HEAD_UNLOCK();
@ -1983,12 +1990,8 @@ pmap_kenter_pa(va, pa, prot)
#if defined(MULTIPROCESSOR) && 0
pmap_tlb_shootdown(pmap, va, PG_ASM);
#endif
if (needisync) {
alpha_pal_imb();
#if defined(MULTIPROCESSOR) && 0
alpha_broadcast_ipi(ALPHA_IPI_IMB);
#endif
}
if (needisync)
PMAP_SYNC_ISTREAM_KERNEL();
}
/*
@ -2070,12 +2073,8 @@ pmap_kremove(va, size)
}
}
if (needisync) {
alpha_pal_imb();
#if defined(MULTIPROCESSOR) && 0
alpha_broadcast_ipi(ALPHA_IPI_IMB);
#endif
}
if (needisync)
PMAP_SYNC_ISTREAM_KERNEL();
}
/*
@ -3980,6 +3979,14 @@ pmap_asn_alloc(pmap, cpu_id)
printf("pmap_asn_alloc: assigning %u to pmap %p\n",
pmap->pm_asn[cpu_id], pmap);
#endif
#if 0 /* XXX Not sure if this is safe yet. --thorpej */
/*
* Have a new ASN, so there's no need to sync the I-stream
* on the way back out to userspace.
*/
alpha_atomic_clearbits_q(&pmap->pm_needisync, (1UL << cpu_id));
#endif
}
#if defined(MULTIPROCESSOR)