1/*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 * Copyright (c) 1994 John S. Dyson
5 * All rights reserved.
6 * Copyright (c) 2003 Peter Wemm
7 * All rights reserved.
8 *
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33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 *
40 * from: @(#)vmparam.h 5.9 (Berkeley) 5/12/91
41 * $FreeBSD: head/sys/amd64/include/vmparam.h 172317 2007-09-25 06:25:06Z alc $
42 */
43
44
45#ifndef _MACHINE_VMPARAM_H_
46#define _MACHINE_VMPARAM_H_ 1
47
48/*
49 * Machine dependent constants for AMD64.
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127 * at most 8 PDEs, collectively mapping 16MB of physical memory. By
128 * reducing the number of distinct 16MB "pages" that are used by UMA,
129 * the physical memory allocator reduces the likelihood of both 2MB
130 * page TLB misses and cache misses caused by 2MB page TLB misses.
131 */
132#define VM_NFREEORDER 13
133
134/*
135 * Virtual addresses of things. Derived from the page directory and
136 * page table indexes from pmap.h for precision.
137 * Because of the page that is both a PD and PT, it looks a little
138 * messy at times, but hey, we'll do anything to save a page :-)
139 */
140
141#define VM_MAX_KERNEL_ADDRESS KVADDR(KPML4I, NPDPEPG-1, NKPDE-1, NPTEPG-1)
142#define VM_MIN_KERNEL_ADDRESS KVADDR(KPML4I, KPDPI, 0, 0)
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2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 * Copyright (c) 1994 John S. Dyson
5 * All rights reserved.
6 * Copyright (c) 2003 Peter Wemm
7 * All rights reserved.
8 *
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33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 *
40 * from: @(#)vmparam.h 5.9 (Berkeley) 5/12/91
41 * $FreeBSD: head/sys/amd64/include/vmparam.h 172317 2007-09-25 06:25:06Z alc $
42 */
43
44
45#ifndef _MACHINE_VMPARAM_H_
46#define _MACHINE_VMPARAM_H_ 1
47
48/*
49 * Machine dependent constants for AMD64.
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127 * at most 8 PDEs, collectively mapping 16MB of physical memory. By
128 * reducing the number of distinct 16MB "pages" that are used by UMA,
129 * the physical memory allocator reduces the likelihood of both 2MB
130 * page TLB misses and cache misses caused by 2MB page TLB misses.
131 */
132#define VM_NFREEORDER 13
133
134/*
135 * Virtual addresses of things. Derived from the page directory and
136 * page table indexes from pmap.h for precision.
137 * Because of the page that is both a PD and PT, it looks a little
138 * messy at times, but hey, we'll do anything to save a page :-)
139 */
140
141#define VM_MAX_KERNEL_ADDRESS KVADDR(KPML4I, NPDPEPG-1, NKPDE-1, NPTEPG-1)
142#define VM_MIN_KERNEL_ADDRESS KVADDR(KPML4I, KPDPI, 0, 0)
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