/* $NetBSD: vmparam.h,v 1.21 2024/06/30 09:36:43 jmcneill Exp $ */ /*- * Copyright (c) 2014 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Matt Thomas of 3am Software Foundry. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ #ifndef _AARCH64_VMPARAM_H_ #define _AARCH64_VMPARAM_H_ #ifdef __aarch64__ #define __USE_TOPDOWN_VM /* * Default pager_map of 16MB is small and we have plenty of VA to burn. */ #define PAGER_MAP_DEFAULT_SIZE (512 * 1024 * 1024) /* * Defaults for Unified Buffer Cache parameters. */ #ifndef UBC_WINSHIFT #define UBC_WINSHIFT 16 /* 64kB */ #endif #ifndef UBC_NWINS #define UBC_NWINS 4096 /* 256MB */ #endif /* * AARCH64 supports 3 page sizes: 4KB, 16KB, 64KB. Each page table can * even have its own page size. */ #ifdef AARCH64_PAGE_SHIFT #if (1 << AARCH64_PAGE_SHIFT) & ~0x141000 #error AARCH64_PAGE_SHIFT contains an unsupported value. #endif #define PAGE_SHIFT AARCH64_PAGE_SHIFT #else #define PAGE_SHIFT 12 #endif #define PAGE_SIZE (1 << PAGE_SHIFT) #define PAGE_MASK (PAGE_SIZE - 1) #if PAGE_SHIFT <= 14 #define USPACE 32768 #else #define USPACE 65536 #endif #define UPAGES (USPACE >> PAGE_SHIFT) /* * USRSTACK is the top (end) of the user stack. The user VA space is a * 48-bit address space starting at 0. Place the stack at its top end. */ #define USRSTACK VM_MAXUSER_ADDRESS #ifndef MAXTSIZ #define MAXTSIZ (1L << 30) /* max text size (1GB) */ #endif #ifndef MAXDSIZ #define MAXDSIZ (1L << 36) /* max data size (64GB) */ #endif #ifndef MAXSSIZ #define MAXSSIZ (1L << 26) /* max stack size (64MB) */ #endif #ifndef DFLDSIZ #define DFLDSIZ (1L << 32) /* default data size (4GB) */ #endif #ifndef DFLSSIZ #define DFLSSIZ (1L << 23) /* default stack size (8MB) */ #endif #define USRSTACK32 VM_MAXUSER_ADDRESS32 #ifndef MAXDSIZ32 #define MAXDSIZ32 (3U*1024*1024*1024) /* max data size */ #endif #ifndef MAXSSIZ32 #define MAXSSIZ32 (64*1024*1024) /* max stack size */ #endif #ifndef DFLDSIZ32 #define DFLDSIZ32 (1L << 27) /* 32bit default data size (128MB) */ #endif #ifndef DFLSSIZ32 #define DFLSSIZ32 (1L << 21) /* 32bit default stack size (2MB) */ #endif #define VM_MIN_ADDRESS ((vaddr_t) 0x0) #define VM_MAXUSER_ADDRESS ((vaddr_t) (1L << 48) - PAGE_SIZE) #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS #define VM_MAXUSER_ADDRESS32 ((vaddr_t) 0xfffff000) /* * kernel virtual space layout: * 0xffff_0000_0000_0000 - 64T direct mapping * 0xffff_4000_0000_0000 - 32T (KASAN SHADOW MAP) * 0xffff_6000_0000_0000 - 32T (not used) * 0xffff_8000_0000_0000 - 1G (EFI_RUNTIME - legacy) * 0xffff_8000_4000_0000 - 64T (not used) * 0xffff_c000_0000_0000 - 64T KERNEL VM Space (including text/data/bss) * (0xffff_c000_4000_0000 -1GB) KERNEL VM start of KVM * 0xffff_ffff_f000_0000 - 254M KERNEL_IO for pmap_devmap * 0xffff_ffff_ffe0_0000 - 2M RESERVED */ #define VM_MIN_KERNEL_ADDRESS ((vaddr_t) 0xffffc00000000000L) #define VM_MAX_KERNEL_ADDRESS ((vaddr_t) 0xffffffffffe00000L) /* * Reserved space for EFI runtime services (legacy) */ #define EFI_RUNTIME_VA 0xffff800000000000L #define EFI_RUNTIME_SIZE 0x0000000040000000L /* * last 254MB of kernel vm area (0xfffffffff0000000-0xffffffffffe00000) * may be used for devmap. see aarch64/pmap.c:pmap_devmap_* */ #define VM_KERNEL_IO_BASE 0xfffffffff0000000L #define VM_KERNEL_IO_SIZE (VM_MAX_KERNEL_ADDRESS - VM_KERNEL_IO_BASE) #define VM_KERNEL_VM_BASE (0xffffc00040000000L) #define VM_KERNEL_VM_SIZE (VM_KERNEL_IO_BASE - VM_KERNEL_VM_BASE) /* virtual sizes (bytes) for various kernel submaps */ #define USRIOSIZE (PAGE_SIZE / 8) #define VM_PHYS_SIZE (USRIOSIZE * PAGE_SIZE) #define VM_DEFAULT_ADDRESS32_TOPDOWN(da, sz) \ trunc_page(USRSTACK32 - MAXSSIZ32 - (sz) - user_stack_guard_size) #define VM_DEFAULT_ADDRESS32_BOTTOMUP(da, sz) \ round_page((vaddr_t)(da) + (vsize_t)MAXDSIZ32) /* * Since we have the address space, we map all of physical memory (RAM) * using block page table entries. */ #define AARCH64_DIRECTMAP_MASK ((vaddr_t) 0xffff000000000000L) #define AARCH64_DIRECTMAP_SIZE (1UL << 46) /* 64TB */ #define AARCH64_DIRECTMAP_START AARCH64_DIRECTMAP_MASK #define AARCH64_DIRECTMAP_END (AARCH64_DIRECTMAP_START + AARCH64_DIRECTMAP_SIZE) #define AARCH64_KVA_P(va) (((vaddr_t) (va) & AARCH64_DIRECTMAP_MASK) != 0) #define AARCH64_PA_TO_KVA(pa) ((vaddr_t) ((pa) | AARCH64_DIRECTMAP_START)) #define AARCH64_KVA_TO_PA(va) ((paddr_t) ((va) & ~AARCH64_DIRECTMAP_MASK)) /* */ #define VM_PHYSSEG_MAX 256 /* XXX */ #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH #define VM_NFREELIST 1 #define VM_FREELIST_DEFAULT 0 #elif defined(__arm__) #include <arm/vmparam.h> #endif /* __aarch64__/__arm__ */ #endif /* _AARCH64_VMPARAM_H_ */
