78257765f2
Enable SHM_LARGEPAGE support on arm64. Reviewed by: alc, kib Sponsored by: Juniper Networks, Inc., Klara, Inc. Differential Revision: https://reviews.freebsd.org/D26467
254 lines
7.6 KiB
C
254 lines
7.6 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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* Copyright (c) 1994 John S. Dyson
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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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. 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: @(#)vmparam.h 5.9 (Berkeley) 5/12/91
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* $FreeBSD$
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*/
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#ifndef _MACHINE_VMPARAM_H_
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#define _MACHINE_VMPARAM_H_ 1
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/*
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* Machine dependent constants for 386.
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*/
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/*
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* Virtual memory related constants, all in bytes
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*/
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#define MAXTSIZ (128UL*1024*1024) /* max text size */
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#ifndef DFLDSIZ
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#define DFLDSIZ (128UL*1024*1024) /* initial data size limit */
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#endif
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#ifndef MAXDSIZ
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#define MAXDSIZ (512UL*1024*1024) /* max data size */
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#endif
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#ifndef DFLSSIZ
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#define DFLSSIZ (8UL*1024*1024) /* initial stack size limit */
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#endif
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#ifndef MAXSSIZ
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#define MAXSSIZ (64UL*1024*1024) /* max stack size */
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#endif
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#ifndef SGROWSIZ
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#define SGROWSIZ (128UL*1024) /* amount to grow stack */
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#endif
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/*
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* Choose between DENSE and SPARSE based on whether lower execution time or
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* lower kernel address space consumption is desired. Under PAE, kernel
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* address space is often in short supply.
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*/
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#ifdef PAE
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#define VM_PHYSSEG_SPARSE
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#else
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#define VM_PHYSSEG_DENSE
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#endif
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/*
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* The number of PHYSSEG entries must be one greater than the number
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* of phys_avail entries because the phys_avail entry that spans the
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* largest physical address that is accessible by ISA DMA is split
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* into two PHYSSEG entries.
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*/
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#define VM_PHYSSEG_MAX 17
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/*
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* Create one free page pool. Since the i386 kernel virtual address
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* space does not include a mapping onto the machine's entire physical
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* memory, VM_FREEPOOL_DIRECT is defined as an alias for the default
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* pool, VM_FREEPOOL_DEFAULT.
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*/
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#define VM_NFREEPOOL 1
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#define VM_FREEPOOL_DEFAULT 0
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#define VM_FREEPOOL_DIRECT 0
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/*
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* Create up to three free page lists: VM_FREELIST_DMA32 is for physical pages
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* that have physical addresses below 4G but are not accessible by ISA DMA,
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* and VM_FREELIST_ISADMA is for physical pages that are accessible by ISA
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* DMA.
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*/
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#define VM_NFREELIST 3
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#define VM_FREELIST_DEFAULT 0
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#define VM_FREELIST_DMA32 1
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#define VM_FREELIST_LOWMEM 2
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#define VM_LOWMEM_BOUNDARY (16 << 20) /* 16MB ISA DMA limit */
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/*
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* Always create DMA32 freelist if there is any memory above 4G.
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* Bounce dma is extremely fragile and simultaneously intensively
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* used.
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*/
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#define VM_DMA32_NPAGES_THRESHOLD 1
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/*
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* The largest allocation size is 2MB under PAE and 4MB otherwise.
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*/
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#define VM_NFREEORDER_PAE 10
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#define VM_NFREEORDER_NOPAE 11
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#define VM_NFREEORDER_MAX VM_NFREEORDER_NOPAE
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#define VM_NFREEORDER i386_pmap_VM_NFREEORDER
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/*
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* Enable superpage reservations: 1 level.
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*/
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#ifndef VM_NRESERVLEVEL
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#define VM_NRESERVLEVEL 1
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#endif
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/*
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* Level 0 reservations consist of 512 pages when PAE pagetables are
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* used, and 1024 pages otherwise.
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*/
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#ifndef VM_LEVEL_0_ORDER
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#define VM_LEVEL_0_ORDER_PAE 9
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#define VM_LEVEL_0_ORDER_NOPAE 10
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#define VM_LEVEL_0_ORDER_MAX VM_LEVEL_0_ORDER_NOPAE
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#define VM_LEVEL_0_ORDER i386_pmap_VM_LEVEL_0_ORDER
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#else
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#define VM_LEVEL_0_ORDER_MAX VM_LEVEL_0_ORDER
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#endif
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/*
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* Kernel physical load address.
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*/
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#ifndef KERNLOAD
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#define KERNLOAD (8 * 1024 * 1024)
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#endif /* !defined(KERNLOAD) */
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/*
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* Virtual addresses of things. Derived from the page directory and
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* page table indexes from pmap.h for precision.
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* Because of the page that is both a PD and PT, it looks a little
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* messy at times, but hey, we'll do anything to save a page :-)
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*/
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#define VM_MAX_KERNEL_ADDRESS (0xffffffffU - 16 * 1024 * 1024 + 1)
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#define VM_MIN_KERNEL_ADDRESS 0
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#define KERNBASE KERNLOAD
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#define UPT_MAX_ADDRESS VADDR(PTDPTDI, PTDPTDI)
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#define UPT_MIN_ADDRESS VADDR(PTDPTDI, 0)
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#define VM_MAXUSER_ADDRESS (0xffffffff - 4 * 1024 * 1024 + 1)
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#define SHAREDPAGE (VM_MAXUSER_ADDRESS - PAGE_SIZE)
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#define USRSTACK SHAREDPAGE
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#define VM_MAX_ADDRESS VADDR(PTDPTDI, 0)
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#define VM_MIN_ADDRESS ((vm_offset_t)0)
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#define PMAP_TRM_MIN_ADDRESS VM_MAXUSER_ADDRESS
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#define PMAP_TRM_MAX_ADDRESS 0xffffffff
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#define PMAP_MAP_LOW (4 * 1024 * 1024)
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/*
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* KVA layout. The unit of the system allocation is single PDE, which
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* represents NBPDR bytes, aligned to NBPDR. NBPDR is 4M for non-PAE
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* page tables, and 2M for PAE, so PAE mode requires twice as many PTDs
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* to create the same memory map as non-PAE.
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*
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* 0x00000000 - 0x003fffff Transient identity map of low memory (0-4M),
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* normally disabled to catch NULL derefs.
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* 0x00400000 - 0x007fffff Fixed mapping of the low memory (4-8M).
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* 0x00800000 - 0xffbfffff KERNBASE (VA) == KERNLOAD (PA), kernel
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* text + data and all kernel maps. Managed
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* by MI VM.
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* 0xffc00000 - 0xffdfffff Recursive kernel page table mapping, pointed
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* to by PTmap. PTD[] recursively points
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* into PTmap.
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* 0xffe00000 - 0xffffffff Kernel/User mode shared PDE, contains GDT,
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* IDT, TSS, LDT, trampoline code and stacks.
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* Managed by pmap_trm_alloc().
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*/
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/*
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* How many physical pages per kmem arena virtual page.
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*/
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#ifndef VM_KMEM_SIZE_SCALE
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#define VM_KMEM_SIZE_SCALE (1)
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#endif
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/*
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* Optional floor (in bytes) on the size of the kmem arena.
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*/
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#ifndef VM_KMEM_SIZE_MIN
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#define VM_KMEM_SIZE_MIN (12 * 1024 * 1024)
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#endif
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/*
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* Optional ceiling (in bytes) on the size of the kmem arena: 40% of the
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* kernel map rounded to the nearest multiple of the superpage size.
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*/
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#ifndef VM_KMEM_SIZE_MAX
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#define VM_KMEM_SIZE_MAX (((((VM_MAX_KERNEL_ADDRESS - \
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VM_MIN_KERNEL_ADDRESS) >> (PDRSHIFT - 2)) + 5) / 10) << PDRSHIFT)
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#endif
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/* initial pagein size of beginning of executable file */
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#ifndef VM_INITIAL_PAGEIN
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#define VM_INITIAL_PAGEIN 16
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#endif
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#define ZERO_REGION_SIZE (64 * 1024) /* 64KB */
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#ifndef VM_MAX_AUTOTUNE_MAXUSERS
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#define VM_MAX_AUTOTUNE_MAXUSERS 384
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#endif
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#define SFBUF
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#define SFBUF_MAP
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#define SFBUF_CPUSET
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#define SFBUF_PROCESS_PAGE
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#define PMAP_HAS_DMAP 0
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#define PHYS_TO_DMAP(x) ({ panic("No direct map exists"); 0; })
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#define DMAP_TO_PHYS(x) ({ panic("No direct map exists"); 0; })
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/*
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* No non-transparent large page support in the pmap.
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*/
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#define PMAP_HAS_LARGEPAGES 0
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/*
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* Need a page dump array for minidump.
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*/
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#define MINIDUMP_PAGE_TRACKING 1
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#endif /* _MACHINE_VMPARAM_H_ */
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