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