57 lines
1.9 KiB
C
57 lines
1.9 KiB
C
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/*
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* Copyright 2010 Tilera Corporation. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, version 2.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for
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* more details.
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*
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* Structure definitions for migration, exposed here for use by
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* arch/tile/kernel/asm-offsets.c.
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*/
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#ifndef MM_MIGRATE_H
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#define MM_MIGRATE_H
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#include <linux/cpumask.h>
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#include <hv/hypervisor.h>
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/*
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* This function is used as a helper when setting up the initial
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* page table (swapper_pg_dir).
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*
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* You must mask ALL interrupts prior to invoking this code, since
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* you can't legally touch the stack during the cache flush.
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*/
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extern int flush_and_install_context(HV_PhysAddr page_table, HV_PTE access,
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HV_ASID asid,
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const unsigned long *cpumask);
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/*
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* This function supports migration as a "helper" as follows:
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*
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* - Set the stack PTE itself to "migrating".
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* - Do a global TLB flush for (va,length) and the specified ASIDs.
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* - Do a cache-evict on all necessary cpus.
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* - Write the new stack PTE.
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*
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* Note that any non-NULL pointers must not point to the page that
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* is handled by the stack_pte itself.
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*
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* You must mask ALL interrupts prior to invoking this code, since
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* you can't legally touch the stack during the cache flush.
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*/
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extern int homecache_migrate_stack_and_flush(pte_t stack_pte, unsigned long va,
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size_t length, pte_t *stack_ptep,
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const struct cpumask *cache_cpumask,
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const struct cpumask *tlb_cpumask,
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HV_Remote_ASID *asids,
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int asidcount);
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#endif /* MM_MIGRATE_H */
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