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Change the way how pmap_protect() modifies the protection of KSEG2 

space using MIPS_TBRPL() call.  It avoils to 'vistimize' a possibly
useful TLB entry. XXX MachTLBUpdate() will be retired, soon.
This commit is contained in:
nisimura 2000-04-16 10:16:19 +00:00
parent 8feff14832
commit a01973aecb
1 changed files with 12 additions and 7 deletions
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19
sys/arch/mips/mips/pmap.c
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@ -1,4 +1,4 @@
/* $NetBSD: pmap.c,v 1.92 2000/04/12 01:05:36 nisimura Exp $ */
/* $NetBSD: pmap.c,v 1.93 2000/04/16 10:16:19 nisimura Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
@ -78,7 +78,7 @@
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.92 2000/04/12 01:05:36 nisimura Exp $");
__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.93 2000/04/16 10:16:19 nisimura Exp $");
/*
* Manages physical address maps.
@ -901,13 +901,18 @@ pmap_protect(pmap, sva, eva, prot)
entry = pte->pt_entry;
if (!mips_pg_v(entry))
continue;
entry = (entry & ~(mips_pg_m_bit() |
mips_pg_ro_bit())) | p;
entry &= ~(mips_pg_m_bit() | mips_pg_ro_bit());
entry |= p;
pte->pt_entry = entry;
/*
* Update the TLB if the given address is in the cache.
*/
#if defined(MIPS1) && !defined(MIPS3)
{
extern void mips1_TBRPL(vaddr_t, vaddr_t, paddr_t);
/* replace PTE iff sva is found in TLB */
mips1_TBRPL(sva, sva, entry);
}
#else
MachTLBUpdate(sva, entry);
#endif
}
return;
}