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/* $NetBSD: vmparam.h,v 1.56 2020/10/08 12:49:06 he Exp $ */
/*
* Copyright (c) 2001, 2002 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* 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 for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
* 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 _ARM_ARM32_VMPARAM_H_
#define _ARM_ARM32_VMPARAM_H_
#if defined(_KERNEL_OPT)
#include "opt_kasan.h"
#endif
/*
* Virtual Memory parameters common to all arm32 platforms.
*/
#include <sys/cdefs.h>
#include <arm/cpuconf.h>
#include <arm/arm32/param.h>
#define __USE_TOPDOWN_VM
#define USRSTACK VM_MAXUSER_ADDRESS
/*
* ARMv4 systems are normaly configured for 256MB KVA only, so restrict
* the size of the pager map to 4MB.
*/
#ifndef _ARM_ARCH_5
#define PAGER_MAP_DEFAULT_SIZE (4 * 1024 * 1024)
#endif
/*
* Note that MAXTSIZ can't be larger than 32M, otherwise the compiler
* would have to be changed to not generate "bl" instructions.
*/
#define MAXTSIZ (128*1024*1024) /* max text size */
#ifndef DFLDSIZ
#define DFLDSIZ (384*1024*1024) /* initial data size limit */
#endif
#ifndef MAXDSIZ
#define MAXDSIZ (1856*1024*1024) /* max data size */
#endif
#ifndef DFLSSIZ
#define DFLSSIZ (4*1024*1024) /* initial stack size limit */
#endif
#ifndef MAXSSIZ
#define MAXSSIZ (64*1024*1024) /* max stack size */
#endif
/*
* While the ARM architecture defines Section mappings, large pages,
* and small pages, the standard MMU page size is (and will always be) 4K.
*/
#define PAGE_SHIFT PGSHIFT
#define PAGE_SIZE (1 << PAGE_SHIFT)
#define PAGE_MASK (PAGE_SIZE - 1)
/*
* Mach derived constants
*/
#define VM_MIN_ADDRESS ((vaddr_t) PAGE_SIZE)
#define VM_MAXUSER_ADDRESS ((vaddr_t) KERNEL_BASE - PAGE_SIZE)
#define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS
#define VM_MIN_KERNEL_ADDRESS ((vaddr_t) KERNEL_BASE)
#define VM_MAX_KERNEL_ADDRESS ((vaddr_t) -(PAGE_SIZE+1))
#if defined(_KERNEL)
// AddressSanitizer dedicates 1/8 of kernel memory to its shadow memory (e.g.
// 128MB to cover 1GB for ARM) and uses a special KVA range for the shadow
// address corresponding to a kernel memory address.
/*
* kernel virtual space layout without direct map (common case)
*
* 0x8000_0000 - 256MB kernel text/data/bss
* 0x9000_0000 - 1536MB Kernel VM Space
* 0xf000_0000 - 256MB IO
*
* kernel virtual space layout with KASAN
*
* 0x8000_0000 - 256MB kernel text/data/bss
* 0x9000_0000 - 768MB Kernel VM Space
* 0xc000_0000 - 128MB (KASAN SHADOW MAP)
* 0xc800_0000 - 640MB (spare)
* 0xf000_0000 - 256MB IO
*
* kernel virtual space layout with direct map (1GB limited)
* 0x8000_0000 - 1024MB kernel text/data/bss and direct map start
* 0xc000_0000 - 768MB Kernel VM Space
* 0xf000_0000 - 256MB IO
*
*/
#ifdef KASAN
#define VM_KERNEL_KASAN_BASE 0xc0000000
#define VM_KERNEL_KASAN_SIZE (VM_KERNEL_ADDR_SIZE >> KASAN_SHADOW_SCALE_SHIFT)
#define VM_KERNEL_KASAN_END (VM_KERNEL_KASAN_BASE + VM_KERNEL_KASAN_SIZE)
#define VM_KERNEL_VM_END VM_KERNEL_KASAN_BASE
#else
#define VM_KERNEL_VM_END VM_KERNEL_IO_ADDRESS
#endif
#ifdef __HAVE_MM_MD_DIRECT_MAPPED_PHYS
#ifdef KASAN
#error KASAN and __HAVE_MM_MD_DIRECT_MAPPED_PHYS is unsupported
#endif
#define VM_KERNEL_VM_BASE 0xc0000000
#else
#define VM_KERNEL_VM_BASE 0x90000000
#endif
#define VM_KERNEL_ADDR_SIZE (VM_KERNEL_VM_END - KERNEL_BASE)
#define VM_KERNEL_VM_SIZE (VM_KERNEL_VM_END - VM_KERNEL_VM_BASE)
#define VM_KERNEL_IO_ADDRESS 0xf0000000
#define VM_KERNEL_IO_SIZE (VM_MAX_KERNEL_ADDRESS - VM_KERNEL_IO_ADDRESS)
#endif
#endif /* _ARM_ARM32_VMPARAM_H_ */
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