5aebb40291
size. This avoids blowing out kva in kmeminit() on large memory machines (4 gigs or more). Reviewed by: tmm
158 lines
4.3 KiB
C
158 lines
4.3 KiB
C
/*-
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* Copyright (c) 1989, 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software developed by the Computer Systems
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* Engineering group at Lawrence Berkeley Laboratory under DARPA contract
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* BG 91-66 and contributed to Berkeley.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: FreeBSD: src/lib/libkvm/kvm_i386.c,v 1.15 2001/10/10 17:48:43
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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static char sccsid[] = "@(#)kvm_hp300.c 8.1 (Berkeley) 6/4/93";
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#endif
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#endif /* LIBC_SCCS and not lint */
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/*
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* sparc64 machine dependent routines for kvm.
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*/
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#include <sys/param.h>
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#include <sys/user.h>
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#include <sys/proc.h>
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#include <sys/stat.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <nlist.h>
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#include <kvm.h>
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#include <vm/vm.h>
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#include <vm/vm_param.h>
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#include <machine/tte.h>
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#include <machine/tsb.h>
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#include <limits.h>
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#include "kvm_private.h"
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#ifndef btop
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#define btop(x) (sparc64_btop(x))
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#define ptob(x) (sparc64_ptob(x))
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#endif
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struct vmstate {
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vm_offset_t vm_tsb;
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vm_size_t vm_tsb_mask;
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};
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void
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_kvm_freevtop(kvm_t *kd)
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{
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if (kd->vmst != 0) {
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free(kd->vmst);
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}
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}
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int
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_kvm_initvtop(kvm_t *kd)
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{
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struct nlist nlist[2];
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struct vmstate *vm;
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vm_offset_t pa;
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vm_size_t mask;
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vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm));
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if (vm == NULL) {
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_kvm_err(kd, kd->program, "cannot allocate vm");
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return (-1);
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}
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kd->vmst = vm;
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vm->vm_tsb = 0;
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nlist[0].n_name = "tsb_kernel_phys";
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nlist[1].n_name = "tsb_kernel_mask";
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nlist[2].n_name = 0;
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if (kvm_nlist(kd, nlist) != 0) {
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_kvm_err(kd, kd->program, "bad namelist");
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return (-1);
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}
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if (kvm_read(kd, nlist[0].n_value, &pa, sizeof(pa)) != sizeof(pa) ||
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kvm_read(kd, nlist[1].n_value, &mask, sizeof(mask)) !=
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sizeof(mask)) {
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_kvm_err(kd, kd->program, "cannot read tsb_kernel_phys");
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return (-1);
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}
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vm->vm_tsb = pa;
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vm->vm_tsb_mask = mask;
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return (0);
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}
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int
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_kvm_kvatop(kvm_t *kd, u_long va, u_long *pa)
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{
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struct vmstate *vm;
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struct tte tte;
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u_long offset;
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u_long tte_pa;
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u_long vpn;
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vpn = btop(va);
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offset = va & PAGE_MASK;
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tte_pa = kd->vmst->vm_tsb +
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((vpn & kd->vmst->vm_tsb_mask) << TTE_SHIFT);
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/* XXX This has to be a physical address read, kvm_read is virtual */
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if (lseek(kd->pmfd, tte_pa, 0) == -1) {
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_kvm_syserr(kd, kd->program, "_kvm_vatop: lseek");
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goto invalid;
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}
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if (read(kd->pmfd, &tte, sizeof(tte)) != sizeof(tte)) {
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_kvm_syserr(kd, kd->program, "_kvm_vatop: read");
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goto invalid;
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}
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if (!tte_match(&tte, va))
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goto invalid;
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*pa = TTE_GET_PA(&tte) + offset;
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return (PAGE_SIZE - offset);
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invalid:
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_kvm_err(kd, 0, "invalid address (%x)", va);
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return (0);
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}
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