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/* $NetBSD: vmparam.h,v 1.19.4.1 2024/07/03 19:13:20 martin 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_ADDRESS 0xfffffffff0000000L
#define VM_KERNEL_IO_SIZE (VM_MAX_KERNEL_ADDRESS - VM_KERNEL_IO_ADDRESS)
#define VM_KERNEL_VM_BASE (0xffffc00040000000L)
#define VM_KERNEL_VM_SIZE (VM_KERNEL_IO_ADDRESS - 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_ */
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