Current File : //backups/router/usr/lib/include/machine/vmparam.h
/*-
* SPDX-License-Identifier: BSD-4-Clause
*
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
* Copyright (c) 1994 John S. Dyson
* All rights reserved.
* Copyright (c) 2003 Peter Wemm
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: @(#)vmparam.h 5.9 (Berkeley) 5/12/91
*/
#ifdef __i386__
#include <i386/vmparam.h>
#else /* !__i386__ */
#ifndef _MACHINE_VMPARAM_H_
#define _MACHINE_VMPARAM_H_ 1
/*
* Machine dependent constants for AMD64.
*/
/*
* Virtual memory related constants, all in bytes
*/
#define MAXTSIZ (32768UL*1024*1024) /* max text size */
#ifndef DFLDSIZ
#define DFLDSIZ (32768UL*1024*1024) /* initial data size limit */
#endif
#ifndef MAXDSIZ
#define MAXDSIZ (32768UL*1024*1024) /* max data size */
#endif
#ifndef DFLSSIZ
#define DFLSSIZ (8UL*1024*1024) /* initial stack size limit */
#endif
#ifndef MAXSSIZ
#define MAXSSIZ (512UL*1024*1024) /* max stack size */
#endif
#ifndef SGROWSIZ
#define SGROWSIZ (128UL*1024) /* amount to grow stack */
#endif
/*
* We provide a machine specific single page allocator through the use
* of the direct mapped segment. This uses 2MB pages for reduced
* TLB pressure.
*/
#if !defined(KASAN) && !defined(KMSAN)
#define UMA_MD_SMALL_ALLOC
#endif
/*
* The physical address space is densely populated.
*/
#define VM_PHYSSEG_DENSE
/*
* The number of PHYSSEG entries must be one greater than the number
* of phys_avail entries because the phys_avail entry that spans the
* largest physical address that is accessible by ISA DMA is split
* into two PHYSSEG entries.
*/
#define VM_PHYSSEG_MAX 63
/*
* Create two free page pools: VM_FREEPOOL_DEFAULT is the default pool
* from which physical pages are allocated and VM_FREEPOOL_DIRECT is
* the pool from which physical pages for page tables and small UMA
* objects are allocated.
*/
#define VM_NFREEPOOL 2
#define VM_FREEPOOL_DEFAULT 0
#define VM_FREEPOOL_DIRECT 1
/*
* Create up to three free page lists: VM_FREELIST_DMA32 is for physical pages
* that have physical addresses below 4G but are not accessible by ISA DMA,
* and VM_FREELIST_ISADMA is for physical pages that are accessible by ISA
* DMA.
*/
#define VM_NFREELIST 3
#define VM_FREELIST_DEFAULT 0
#define VM_FREELIST_DMA32 1
#define VM_FREELIST_LOWMEM 2
#define VM_LOWMEM_BOUNDARY (16 << 20) /* 16MB ISA DMA limit */
/*
* Create the DMA32 free list only if the number of physical pages above
* physical address 4G is at least 16M, which amounts to 64GB of physical
* memory.
*/
#define VM_DMA32_NPAGES_THRESHOLD 16777216
/*
* An allocation size of 16MB is supported in order to optimize the
* use of the direct map by UMA. Specifically, a cache line contains
* at most 8 PDEs, collectively mapping 16MB of physical memory. By
* reducing the number of distinct 16MB "pages" that are used by UMA,
* the physical memory allocator reduces the likelihood of both 2MB
* page TLB misses and cache misses caused by 2MB page TLB misses.
*/
#define VM_NFREEORDER 13
/*
* Enable superpage reservations: 1 level.
*/
#ifndef VM_NRESERVLEVEL
#define VM_NRESERVLEVEL 1
#endif
/*
* Level 0 reservations consist of 512 pages.
*/
#ifndef VM_LEVEL_0_ORDER
#define VM_LEVEL_0_ORDER 9
#endif
#ifdef SMP
#define PA_LOCK_COUNT 256
#endif
/*
* Kernel physical load address for non-UEFI boot and for legacy UEFI loader.
* Newer UEFI loader loads kernel anywhere below 4G, with memory allocated
* by boot services.
* Needs to be aligned at 2MB superpage boundary.
*/
#ifndef KERNLOAD
#define KERNLOAD 0x200000
#endif
/*
* Virtual addresses of things. Derived from the page directory and
* page table indexes from pmap.h for precision.
*
* 0x0000000000000000 - 0x00007fffffffffff user map
* 0x0000800000000000 - 0xffff7fffffffffff does not exist (hole)
* 0xffff800000000000 - 0xffff804020100fff recursive page table (512GB slot)
* 0xffff804020100fff - 0xffff807fffffffff unused
* 0xffff808000000000 - 0xffff847fffffffff large map (can be tuned up)
* 0xffff848000000000 - 0xfffff77fffffffff unused (large map extends there)
* 0xfffff60000000000 - 0xfffff7ffffffffff 2TB KMSAN origin map, optional
* 0xfffff78000000000 - 0xfffff7bfffffffff 512GB KASAN shadow map, optional
* 0xfffff80000000000 - 0xfffffbffffffffff 4TB direct map
* 0xfffffc0000000000 - 0xfffffdffffffffff 2TB KMSAN shadow map, optional
* 0xfffffe0000000000 - 0xffffffffffffffff 2TB kernel map
*
* Within the kernel map:
*
* 0xfffffe0000000000 vm_page_array
* 0xffffffff80000000 KERNBASE
*/
#define VM_MIN_KERNEL_ADDRESS KV4ADDR(KPML4BASE, 0, 0, 0)
#define VM_MAX_KERNEL_ADDRESS KV4ADDR(KPML4BASE + NKPML4E - 1, \
NPDPEPG-1, NPDEPG-1, NPTEPG-1)
#define DMAP_MIN_ADDRESS KV4ADDR(DMPML4I, 0, 0, 0)
#define DMAP_MAX_ADDRESS KV4ADDR(DMPML4I + NDMPML4E, 0, 0, 0)
#define KASAN_MIN_ADDRESS KV4ADDR(KASANPML4I, 0, 0, 0)
#define KASAN_MAX_ADDRESS KV4ADDR(KASANPML4I + NKASANPML4E, 0, 0, 0)
#define KMSAN_SHAD_MIN_ADDRESS KV4ADDR(KMSANSHADPML4I, 0, 0, 0)
#define KMSAN_SHAD_MAX_ADDRESS KV4ADDR(KMSANSHADPML4I + NKMSANSHADPML4E, \
0, 0, 0)
#define KMSAN_ORIG_MIN_ADDRESS KV4ADDR(KMSANORIGPML4I, 0, 0, 0)
#define KMSAN_ORIG_MAX_ADDRESS KV4ADDR(KMSANORIGPML4I + NKMSANORIGPML4E, \
0, 0, 0)
#define LARGEMAP_MIN_ADDRESS KV4ADDR(LMSPML4I, 0, 0, 0)
#define LARGEMAP_MAX_ADDRESS KV4ADDR(LMEPML4I + 1, 0, 0, 0)
/*
* Formally kernel mapping starts at KERNBASE, but kernel linker
* script leaves first PDE reserved. For legacy BIOS boot, kernel is
* loaded at KERNLOAD = 2M, and initial kernel page table maps
* physical memory from zero to KERNend starting at KERNBASE.
*
* KERNSTART is where the first actual kernel page is mapped, after
* the compatibility mapping.
*/
#define KERNBASE KV4ADDR(KPML4I, KPDPI, 0, 0)
#define KERNSTART (KERNBASE + NBPDR)
#define UPT_MAX_ADDRESS KV4ADDR(PML4PML4I, PML4PML4I, PML4PML4I, PML4PML4I)
#define UPT_MIN_ADDRESS KV4ADDR(PML4PML4I, 0, 0, 0)
#define VM_MAXUSER_ADDRESS_LA57 UVADDR(NUPML5E, 0, 0, 0, 0)
#define VM_MAXUSER_ADDRESS_LA48 UVADDR(0, NUP4ML4E, 0, 0, 0)
#define VM_MAXUSER_ADDRESS VM_MAXUSER_ADDRESS_LA57
#define SHAREDPAGE_LA57 (VM_MAXUSER_ADDRESS_LA57 - PAGE_SIZE)
#define SHAREDPAGE_LA48 (VM_MAXUSER_ADDRESS_LA48 - PAGE_SIZE)
#define USRSTACK_LA57 SHAREDPAGE_LA57
#define USRSTACK_LA48 SHAREDPAGE_LA48
#define USRSTACK USRSTACK_LA48
#define PS_STRINGS_LA57 (USRSTACK_LA57 - sizeof(struct ps_strings))
#define PS_STRINGS_LA48 (USRSTACK_LA48 - sizeof(struct ps_strings))
#define VM_MAX_ADDRESS UPT_MAX_ADDRESS
#define VM_MIN_ADDRESS (0)
/*
* XXX Allowing dmaplimit == 0 is a temporary workaround for vt(4) efifb's
* early use of PHYS_TO_DMAP before the mapping is actually setup. This works
* because the result is not actually accessed until later, but the early
* vt fb startup needs to be reworked.
*/
#define PHYS_IN_DMAP(pa) (dmaplimit == 0 || (pa) < dmaplimit)
#define VIRT_IN_DMAP(va) ((va) >= DMAP_MIN_ADDRESS && \
(va) < (DMAP_MIN_ADDRESS + dmaplimit))
#define PMAP_HAS_DMAP 1
#define PHYS_TO_DMAP(x) ({ \
KASSERT(PHYS_IN_DMAP(x), \
("physical address %#jx not covered by the DMAP", \
(uintmax_t)x)); \
(x) | DMAP_MIN_ADDRESS; })
#define DMAP_TO_PHYS(x) ({ \
KASSERT(VIRT_IN_DMAP(x), \
("virtual address %#jx not covered by the DMAP", \
(uintmax_t)x)); \
(x) & ~DMAP_MIN_ADDRESS; })
/*
* amd64 maps the page array into KVA so that it can be more easily
* allocated on the correct memory domains.
*/
#define PMAP_HAS_PAGE_ARRAY 1
/*
* How many physical pages per kmem arena virtual page.
*/
#ifndef VM_KMEM_SIZE_SCALE
#define VM_KMEM_SIZE_SCALE (1)
#endif
/*
* Optional ceiling (in bytes) on the size of the kmem arena: 60% of the
* kernel map.
*/
#ifndef VM_KMEM_SIZE_MAX
#define VM_KMEM_SIZE_MAX ((VM_MAX_KERNEL_ADDRESS - \
VM_MIN_KERNEL_ADDRESS + 1) * 3 / 5)
#endif
/* initial pagein size of beginning of executable file */
#ifndef VM_INITIAL_PAGEIN
#define VM_INITIAL_PAGEIN 16
#endif
#define ZERO_REGION_SIZE (2 * 1024 * 1024) /* 2MB */
/*
* The pmap can create non-transparent large page mappings.
*/
#define PMAP_HAS_LARGEPAGES 1
/*
* Need a page dump array for minidump.
*/
#define MINIDUMP_PAGE_TRACKING 1
#endif /* _MACHINE_VMPARAM_H_ */
#endif /* __i386__ */
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