ec32568d63
r333273 and partially reverted with r333594. Older CPUs implement addition of offsets into the page table by a bitwise OR rather than actual addition, which only works if the table is aligned at a multiple of its own size (they also require it to be aligned at a multiple of 256KB). Newer ones do not have that requirement, but it hardly matters to enforce it anyway. The original code was failing on newer systems with huge amounts of RAM (> 512 GB), in which the page table was 4 GB in size. Because the bootstrap memory allocator took its alignment parameter as an int, this turned into a 0, removing any alignment constraint at all and making the MMU fail. The first round of this patch (r333273) fixed this case by aligning it at 256 KB, which broke older CPUs. Fix this instead by widening the alignment parameter.
90 lines
2.7 KiB
C
90 lines
2.7 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (C) 2010 Nathan Whitehorn
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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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* $FreeBSD$
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*/
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#ifndef _POWERPC_AIM_MMU_OEA64_H
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#define _POWERPC_AIM_MMU_OEA64_H
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#include <machine/mmuvar.h>
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extern mmu_def_t oea64_mmu;
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/*
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* Helper routines
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*/
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/* Allocate physical memory for use in moea64_bootstrap. */
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vm_offset_t moea64_bootstrap_alloc(vm_size_t size, vm_size_t align);
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/* Set an LPTE structure to match the contents of a PVO */
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void moea64_pte_from_pvo(const struct pvo_entry *pvo, struct lpte *lpte);
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/*
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* Flags
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*/
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#define MOEA64_PTE_PROT_UPDATE 1
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#define MOEA64_PTE_INVALIDATE 2
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/*
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* Bootstrap subroutines
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*
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* An MMU_BOOTSTRAP() implementation looks like this:
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* moea64_early_bootstrap();
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* Allocate Page Table
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* moea64_mid_bootstrap();
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* Add mappings for MMU resources
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* moea64_late_bootstrap();
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*/
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void moea64_early_bootstrap(mmu_t mmup, vm_offset_t kernelstart,
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vm_offset_t kernelend);
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void moea64_mid_bootstrap(mmu_t mmup, vm_offset_t kernelstart,
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vm_offset_t kernelend);
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void moea64_late_bootstrap(mmu_t mmup, vm_offset_t kernelstart,
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vm_offset_t kernelend);
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/*
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* Statistics
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*/
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extern u_int moea64_pte_valid;
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extern u_int moea64_pte_overflow;
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/*
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* State variables
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*/
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extern int moea64_large_page_shift;
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extern uint64_t moea64_large_page_size;
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extern u_long moea64_pteg_count;
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extern u_long moea64_pteg_mask;
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extern int n_slbs;
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#endif /* _POWERPC_AIM_MMU_OEA64_H */
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