fd2ef8ef5a
i386 and the rest of supported architectures by defining KERNLOAD in the vmparam.h and getting rid of magic constant in the linker script, which albeit documented via comment but isn't programmatically accessible at a compile time. Use KERNLOAD to eliminate another (matching) magic constant 100 lines down inside unremarkable TU "copy.c" 3 levels deep in the EFI loader tree. Reviewed by: markj Approved by: markj MFC after: 1 month Differential Revision: https://reviews.freebsd.org/D27355
275 lines
8.7 KiB
C
275 lines
8.7 KiB
C
/*-
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* SPDX-License-Identifier: BSD-4-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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* Copyright (c) 2003 Peter Wemm
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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. 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: @(#)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 AMD64.
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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 (32768UL*1024*1024) /* max text size */
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#ifndef DFLDSIZ
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#define DFLDSIZ (32768UL*1024*1024) /* initial data size limit */
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#endif
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#ifndef MAXDSIZ
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#define MAXDSIZ (32768UL*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 (512UL*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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* We provide a machine specific single page allocator through the use
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* of the direct mapped segment. This uses 2MB pages for reduced
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* TLB pressure.
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*/
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#define UMA_MD_SMALL_ALLOC
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/*
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* The physical address space is densely populated.
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*/
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#define VM_PHYSSEG_DENSE
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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 63
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/*
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* Create two free page pools: VM_FREEPOOL_DEFAULT is the default pool
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* from which physical pages are allocated and VM_FREEPOOL_DIRECT is
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* the pool from which physical pages for page tables and small UMA
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* objects are allocated.
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*/
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#define VM_NFREEPOOL 2
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#define VM_FREEPOOL_DEFAULT 0
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#define VM_FREEPOOL_DIRECT 1
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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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* Create the DMA32 free list only if the number of physical pages above
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* physical address 4G is at least 16M, which amounts to 64GB of physical
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* memory.
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*/
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#define VM_DMA32_NPAGES_THRESHOLD 16777216
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/*
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* An allocation size of 16MB is supported in order to optimize the
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* use of the direct map by UMA. Specifically, a cache line contains
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* at most 8 PDEs, collectively mapping 16MB of physical memory. By
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* reducing the number of distinct 16MB "pages" that are used by UMA,
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* the physical memory allocator reduces the likelihood of both 2MB
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* page TLB misses and cache misses caused by 2MB page TLB misses.
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*/
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#define VM_NFREEORDER 13
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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.
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*/
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#ifndef VM_LEVEL_0_ORDER
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#define VM_LEVEL_0_ORDER 9
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#endif
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#ifdef SMP
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#define PA_LOCK_COUNT 256
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#endif
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/*
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* Kernel physical load address. Needs to be aligned at 2MB superpage
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* boundary.
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*/
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#ifndef KERNLOAD
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#define KERNLOAD 0x200000
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#endif
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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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*
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* 0x0000000000000000 - 0x00007fffffffffff user map
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* 0x0000800000000000 - 0xffff7fffffffffff does not exist (hole)
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* 0xffff800000000000 - 0xffff804020100fff recursive page table (512GB slot)
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* 0xffff804020100fff - 0xffff807fffffffff unused
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* 0xffff808000000000 - 0xffff847fffffffff large map (can be tuned up)
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* 0xffff848000000000 - 0xfffff7ffffffffff unused (large map extends there)
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* 0xfffff80000000000 - 0xfffffbffffffffff 4TB direct map
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* 0xfffffc0000000000 - 0xfffffdffffffffff unused
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* 0xfffffe0000000000 - 0xffffffffffffffff 2TB kernel map
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*
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* Within the kernel map:
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*
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* 0xfffffe0000000000 vm_page_array
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* 0xffffffff80000000 KERNBASE
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*/
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#define VM_MIN_KERNEL_ADDRESS KV4ADDR(KPML4BASE, 0, 0, 0)
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#define VM_MAX_KERNEL_ADDRESS KV4ADDR(KPML4BASE + NKPML4E - 1, \
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NPDPEPG-1, NPDEPG-1, NPTEPG-1)
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#define DMAP_MIN_ADDRESS KV4ADDR(DMPML4I, 0, 0, 0)
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#define DMAP_MAX_ADDRESS KV4ADDR(DMPML4I + NDMPML4E, 0, 0, 0)
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#define LARGEMAP_MIN_ADDRESS KV4ADDR(LMSPML4I, 0, 0, 0)
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#define LARGEMAP_MAX_ADDRESS KV4ADDR(LMEPML4I + 1, 0, 0, 0)
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#define KERNBASE KV4ADDR(KPML4I, KPDPI, 0, 0)
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#define UPT_MAX_ADDRESS KV4ADDR(PML4PML4I, PML4PML4I, PML4PML4I, PML4PML4I)
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#define UPT_MIN_ADDRESS KV4ADDR(PML4PML4I, 0, 0, 0)
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#define VM_MAXUSER_ADDRESS_LA57 UVADDR(NUPML5E, 0, 0, 0, 0)
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#define VM_MAXUSER_ADDRESS_LA48 UVADDR(0, NUP4ML4E, 0, 0, 0)
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#define VM_MAXUSER_ADDRESS VM_MAXUSER_ADDRESS_LA57
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#define SHAREDPAGE_LA57 (VM_MAXUSER_ADDRESS_LA57 - PAGE_SIZE)
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#define SHAREDPAGE_LA48 (VM_MAXUSER_ADDRESS_LA48 - PAGE_SIZE)
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#define USRSTACK_LA57 SHAREDPAGE_LA57
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#define USRSTACK_LA48 SHAREDPAGE_LA48
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#define USRSTACK USRSTACK_LA48
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#define PS_STRINGS_LA57 (USRSTACK_LA57 - sizeof(struct ps_strings))
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#define PS_STRINGS_LA48 (USRSTACK_LA48 - sizeof(struct ps_strings))
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#define VM_MAX_ADDRESS UPT_MAX_ADDRESS
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#define VM_MIN_ADDRESS (0)
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/*
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* XXX Allowing dmaplimit == 0 is a temporary workaround for vt(4) efifb's
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* early use of PHYS_TO_DMAP before the mapping is actually setup. This works
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* because the result is not actually accessed until later, but the early
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* vt fb startup needs to be reworked.
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*/
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#define PMAP_HAS_DMAP 1
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#define PHYS_TO_DMAP(x) ({ \
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KASSERT(dmaplimit == 0 || (x) < dmaplimit, \
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("physical address %#jx not covered by the DMAP", \
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(uintmax_t)x)); \
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(x) | DMAP_MIN_ADDRESS; })
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#define DMAP_TO_PHYS(x) ({ \
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KASSERT((x) < (DMAP_MIN_ADDRESS + dmaplimit) && \
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(x) >= DMAP_MIN_ADDRESS, \
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("virtual address %#jx not covered by the DMAP", \
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(uintmax_t)x)); \
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(x) & ~DMAP_MIN_ADDRESS; })
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/*
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* amd64 maps the page array into KVA so that it can be more easily
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* allocated on the correct memory domains.
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*/
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#define PMAP_HAS_PAGE_ARRAY 1
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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 ceiling (in bytes) on the size of the kmem arena: 60% of the
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* kernel map.
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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 + 1) * 3 / 5)
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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 (2 * 1024 * 1024) /* 2MB */
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/*
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* Use a fairly large batch size since we expect amd64 systems to have lots of
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* memory.
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*/
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#define VM_BATCHQUEUE_SIZE 31
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/*
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* The pmap can create non-transparent large page mappings.
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*/
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#define PMAP_HAS_LARGEPAGES 1
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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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