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Add address translation support for 4MB pages, which we use to map the

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kernel text.
This commit is contained in:
jld 2008-01-05 06:54:12 +00:00
parent 324e44d74f
commit 1717a7fe75
1 changed files with 10 additions and 2 deletions
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12
lib/libkvm/kvm_i386.c
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@ -1,4 +1,4 @@
/* $NetBSD: kvm_i386.c,v 1.23 2008/01/05 06:22:55 jld Exp $ */
/* $NetBSD: kvm_i386.c,v 1.24 2008/01/05 06:54:12 jld Exp $ */
/*-
* Copyright (c) 1989, 1992, 1993
@ -38,7 +38,7 @@
#if 0
static char sccsid[] = "@(#)kvm_hp300.c 8.1 (Berkeley) 6/4/93";
#else
__RCSID("$NetBSD: kvm_i386.c,v 1.23 2008/01/05 06:22:55 jld Exp $");
__RCSID("$NetBSD: kvm_i386.c,v 1.24 2008/01/05 06:54:12 jld Exp $");
#endif
#endif /* LIBC_SCCS and not lint */
@ -131,6 +131,14 @@ _kvm_kvatop(kd, va, pa)
_kvm_err(kd, 0, "invalid translation (invalid PDE)");
goto lose;
}
if ((pde & PG_PS) != 0) {
/*
* This is a 4MB page.
*/
page_off = va & ~PG_LGFRAME;
*pa = (pde & PG_LGFRAME) + page_off;
return (int)(NBPD_L2 - page_off);
}
pte_pa = (pde & PG_FRAME) + (pl1_pi(va) * sizeof(pt_entry_t));
if (pread(kd->pmfd, (void *) &pte, sizeof(pte),
_kvm_pa2off(kd, pte_pa)) != sizeof(pte)) {