1a55e1d038
Commits r326203 and r326978 broke 64-bit booke kernels by introducing a 1MB zero-pad between the ELF header and the start of the kernel. This didn't cause a build failure, but caused kernels to need to be loaded into memory 1MB lower, which could easily break scripts expecting previous behavior. This change matches the similar change made to AIM in r327358.
265 lines
7.4 KiB
C
265 lines
7.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-4-Clause
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*
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* Copyright (C) 1995, 1996 Wolfgang Solfrank.
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* Copyright (C) 1995, 1996 TooLs GmbH.
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* All rights reserved.
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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 TooLs GmbH.
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* 4. The name of TooLs GmbH may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $NetBSD: vmparam.h,v 1.11 2000/02/11 19:25:16 thorpej Exp $
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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_
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#ifndef LOCORE
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#include <machine/md_var.h>
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#endif
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#define USRSTACK SHAREDPAGE
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#ifndef MAXTSIZ
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#define MAXTSIZ (1*1024*1024*1024) /* max text size */
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#endif
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#ifndef DFLDSIZ
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#define DFLDSIZ (128*1024*1024) /* default data size */
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#endif
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#ifndef MAXDSIZ
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#ifdef __powerpc64__
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#define MAXDSIZ (32UL*1024*1024*1024) /* max data size */
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#else
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#define MAXDSIZ (1*1024*1024*1024) /* max data size */
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#endif
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#endif
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#ifndef DFLSSIZ
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#define DFLSSIZ (8*1024*1024) /* default stack size */
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#endif
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#ifndef MAXSSIZ
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#ifdef __powerpc64__
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#define MAXSSIZ (512*1024*1024) /* max stack size */
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#else
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#define MAXSSIZ (64*1024*1024) /* max stack size */
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#endif
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#endif
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#ifdef AIM
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#define VM_MAXUSER_ADDRESS32 ((vm_offset_t)0xfffff000)
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#else
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#define VM_MAXUSER_ADDRESS32 ((vm_offset_t)0x7ffff000)
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#endif
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/*
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* Would like to have MAX addresses = 0, but this doesn't (currently) work
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*/
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#if !defined(LOCORE)
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#ifdef __powerpc64__
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#define VM_MIN_ADDRESS (0x0000000000000000UL)
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#ifdef AIM
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#define VM_MAXUSER_ADDRESS (0xfffffffffffff000UL)
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#else
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#define VM_MAXUSER_ADDRESS (0x7ffffffffffff000UL)
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#endif
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#define VM_MAX_ADDRESS (0xffffffffffffffffUL)
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#else
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#define VM_MIN_ADDRESS ((vm_offset_t)0)
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#define VM_MAXUSER_ADDRESS VM_MAXUSER_ADDRESS32
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#define VM_MAX_ADDRESS ((vm_offset_t)0xffffffff)
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#endif
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#define SHAREDPAGE (VM_MAXUSER_ADDRESS - PAGE_SIZE)
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#else /* LOCORE */
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#ifdef BOOKE
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#define VM_MIN_ADDRESS 0
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#ifdef __powerpc64__
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#define VM_MAXUSER_ADDRESS 0x7ffffffffffff000
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#else
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#define VM_MAXUSER_ADDRESS 0x7ffff000
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#endif
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#endif
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#endif /* LOCORE */
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#define FREEBSD32_SHAREDPAGE (VM_MAXUSER_ADDRESS32 - PAGE_SIZE)
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#define FREEBSD32_USRSTACK FREEBSD32_SHAREDPAGE
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#ifdef __powerpc64__
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#define VM_MIN_KERNEL_ADDRESS 0xc000000000000000UL
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#define VM_MAX_KERNEL_ADDRESS 0xc0000001c7ffffffUL
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#define VM_MAX_SAFE_KERNEL_ADDRESS VM_MAX_KERNEL_ADDRESS
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#endif
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#ifdef AIM
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#define KERNBASE 0x00100100UL /* start of kernel virtual */
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#ifndef __powerpc64__
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#define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)KERNEL_SR << ADDR_SR_SHFT)
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#define VM_MAX_SAFE_KERNEL_ADDRESS (VM_MIN_KERNEL_ADDRESS + 2*SEGMENT_LENGTH -1)
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#define VM_MAX_KERNEL_ADDRESS (VM_MIN_KERNEL_ADDRESS + 3*SEGMENT_LENGTH - 1)
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#endif
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/*
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* Use the direct-mapped BAT registers for UMA small allocs. This
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* takes pressure off the small amount of available KVA.
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*/
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#define UMA_MD_SMALL_ALLOC
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#else /* Book-E */
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#ifdef __powerpc64__
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#ifndef LOCORE
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#define KERNBASE 0xc000000000000100UL /* start of kernel virtual */
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#else
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#define KERNBASE 0xc000000000000100 /* start of kernel virtual */
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#endif
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#else
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#define KERNBASE 0xc0000000 /* start of kernel virtual */
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#define VM_MIN_KERNEL_ADDRESS KERNBASE
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#define VM_MAX_KERNEL_ADDRESS 0xffffefff
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#define VM_MAX_SAFE_KERNEL_ADDRESS VM_MAX_KERNEL_ADDRESS
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#endif
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#endif /* AIM/E500 */
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#if !defined(LOCORE)
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struct pmap_physseg {
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struct pv_entry *pvent;
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char *attrs;
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};
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#endif
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#define VM_PHYSSEG_MAX 16 /* 1? */
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/*
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* The physical address space is densely populated on 32-bit systems,
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* but may not be on 64-bit ones.
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*/
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#ifdef __powerpc64__
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#define VM_PHYSSEG_SPARSE
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#else
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#define VM_PHYSSEG_DENSE
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#endif
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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 small UMA objects are
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* 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 one free page list.
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*/
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#define VM_NFREELIST 1
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#define VM_FREELIST_DEFAULT 0
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/*
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* The largest allocation size is 4MB.
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*/
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#define VM_NFREEORDER 11
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/*
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* Disable superpage reservations.
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*/
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#ifndef VM_NRESERVLEVEL
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#define VM_NRESERVLEVEL 0
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#endif
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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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#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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* 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 (3)
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#endif
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/*
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* Optional floor (in bytes) on the size of the kmem arena.
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*/
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#ifndef VM_KMEM_SIZE_MIN
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#define VM_KMEM_SIZE_MIN (12 * 1024 * 1024)
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#endif
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/*
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* Optional ceiling (in bytes) on the size of the kmem arena: 40% of the
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* usable KVA space.
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*/
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#ifndef VM_KMEM_SIZE_MAX
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#define VM_KMEM_SIZE_MAX ((VM_MAX_SAFE_KERNEL_ADDRESS - \
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VM_MIN_KERNEL_ADDRESS + 1) * 2 / 5)
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#endif
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#define ZERO_REGION_SIZE (64 * 1024) /* 64KB */
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/*
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* On 32-bit OEA, the only purpose for which sf_buf is used is to implement
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* an opaque pointer required by the machine-independent parts of the kernel.
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* That pointer references the vm_page that is "mapped" by the sf_buf. The
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* actual mapping is provided by the direct virtual-to-physical mapping.
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*
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* On OEA64 and Book-E, we need to do something a little more complicated. Use
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* the runtime-detected hw_direct_map to pick between the two cases. Our
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* friends in vm_machdep.c will do the same to ensure nothing gets confused.
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*/
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#define SFBUF
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#define SFBUF_NOMD
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/*
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* We (usually) have a direct map of all physical memory, so provide
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* a macro to use to get the kernel VA address for a given PA. Returns
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* 0 if the direct map is unavailable. The location of the direct map
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* may not be 1:1 in future, so use of the macro is recommended.
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*/
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#ifdef __powerpc64__
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#define DMAP_BASE_ADDRESS 0x0000000000000000UL
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#else
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#define DMAP_BASE_ADDRESS 0x00000000UL
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#endif
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#define PMAP_HAS_DMAP (hw_direct_map)
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#define PHYS_TO_DMAP(x) ({ \
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KASSERT(hw_direct_map, ("Direct map not provided by PMAP")); \
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(x) | DMAP_BASE_ADDRESS; })
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#define DMAP_TO_PHYS(x) ({ \
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KASSERT(hw_direct_map, ("Direct map not provided by PMAP")); \
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(x) &~ DMAP_BASE_ADDRESS; })
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#endif /* _MACHINE_VMPARAM_H_ */
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