/*- * 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. */ #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 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_USE_DMAP #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 three 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. * VM_FREEPOOL_LAZYINIT is a special-purpose pool that is populated only during * boot and is used to implement deferred initialization of page structures. */ #define VM_NFREEPOOL 3 #define VM_FREEPOOL_LAZYINIT 0 #define VM_FREEPOOL_DEFAULT 1 #define VM_FREEPOOL_DIRECT 2 /* * 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 /* * 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. * * LA48: * 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 * * LA57: * 0x0000000000000000 - 0x00ffffffffffffff user map * 0x0100000000000000 - 0xf0ffffffffffffff does not exist (hole) * 0xff00000000000000 - 0xff00ffffffffffff recursive page table (2048TB slot) * 0xff01000000000000 - 0xff20ffffffffffff direct map (32 x 2048TB slots) * 0xff21000000000000 - 0xff40ffffffffffff large map * 0xff41000000000000 - 0xffff7fffffffffff unused * 0xffff800000000000 - 0xfffff5ffffffffff unused (start of kernel pml4 entry) * 0xfffff60000000000 - 0xfffff7ffffffffff 2TB KMSAN origin map, optional * 0xfffff78000000000 - 0xfffff7bfffffffff 512GB KASAN shadow map, optional * 0xfffff80000000000 - 0xfffffbffffffffff 4TB unused * 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_LA48 KV4ADDR(KPML4BASE, 0, 0, 0) #define VM_MIN_KERNEL_ADDRESS kva_layout.km_low #define VM_MAX_KERNEL_ADDRESS kva_layout.km_high #define KASAN_MIN_ADDRESS (kva_layout.kasan_shadow_low) #define KASAN_MAX_ADDRESS (kva_layout.kasan_shadow_high) #define KMSAN_SHAD_MIN_ADDRESS (kva_layout.kmsan_shadow_low) #define KMSAN_SHAD_MAX_ADDRESS (kva_layout.kmsan_shadow_high) #define KMSAN_ORIG_MIN_ADDRESS (kva_layout.kmsan_origin_low) #define KMSAN_ORIG_MAX_ADDRESS (kva_layout.kmsan_origin_high) /* * 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) >= kva_layout.dmap_low && (va) < kva_layout.dmap_low + dmaplimit) #define PMAP_HAS_DMAP 1 #define PHYS_TO_DMAP(x) __extension__ ({ \ KASSERT(PHYS_IN_DMAP(x), \ ("physical address %#jx not covered by the DMAP", \ (uintmax_t)x)); \ (x) + kva_layout.dmap_low; }) #define DMAP_TO_PHYS(x) __extension__ ({ \ KASSERT(VIRT_IN_DMAP(x), \ ("virtual address %#jx not covered by the DMAP", \ (uintmax_t)x)); \ (x) - kva_layout.dmap_low; }) /* * 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 - \ kva_layout.km_low + 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 #define MINIDUMP_STARTUP_PAGE_TRACKING 1 #endif /* _MACHINE_VMPARAM_H_ */ #endif /* __i386__ */
