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In pmap_map_chunk(), if we can't use a section mapping, then

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make sure that the L1 slot for the current VA points to an L2
table, and panic if it doesn't.
This commit is contained in:
thorpej 2002-02-21 06:36:11 +00:00
parent d96b0a83af
commit 6d35f61035
1 changed files with 11 additions and 2 deletions
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13
sys/arch/arm/arm32/pmap.c
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@ -1,4 +1,4 @@
/* $NetBSD: pmap.c,v 1.44 2002/02/21 05:25:24 thorpej Exp $ */
/* $NetBSD: pmap.c,v 1.45 2002/02/21 06:36:11 thorpej Exp $ */
/*
* Copyright (c) 2001 Richard Earnshaw
@ -142,7 +142,7 @@
#include <machine/param.h>
#include <arm/arm32/katelib.h>
__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.44 2002/02/21 05:25:24 thorpej Exp $");
__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.45 2002/02/21 06:36:11 thorpej Exp $");
#ifdef PMAP_DEBUG
#define PDEBUG(_lev_,_stat_) \
if (pmap_debug_level >= (_lev_)) \
@ -3824,6 +3824,15 @@ pmap_map_chunk(vaddr_t l1pt, vaddr_t l2pt, vaddr_t va, paddr_t pa,
continue;
}
/*
* Ok, we're going to use an L2 table. Make sure
* one is actually in the corresponding L1 slot
* for the current VA.
*/
if ((pde[va >> PDSHIFT] & L1_MASK) != L1_PAGE)
panic("pmap_map_chunk: no L2 table for VA 0x%08lx\n",
va);
/* See if we can use a L2 large page mapping. */
if (((pa | va) & (L2_LPAGE_SIZE - 1)) == 0 &&
resid >= L2_LPAGE_SIZE) {