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/arch/tile/mm/migrate.h

https://bitbucket.org/ndreys/linux-sunxi
C++ Header | 50 lines | 14 code | 5 blank | 31 comment | 0 complexity | 25c994e9165da17d00ae38778dbc9a40 MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
 1/*
 2 * Copyright 2010 Tilera Corporation. All Rights Reserved.
 3 *
 4 *   This program is free software; you can redistribute it and/or
 5 *   modify it under the terms of the GNU General Public License
 6 *   as published by the Free Software Foundation, version 2.
 7 *
 8 *   This program is distributed in the hope that it will be useful, but
 9 *   WITHOUT ANY WARRANTY; without even the implied warranty of
10 *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
11 *   NON INFRINGEMENT.  See the GNU General Public License for
12 *   more details.
13 *
14 * Structure definitions for migration, exposed here for use by
15 * arch/tile/kernel/asm-offsets.c.
16 */
17
18#ifndef MM_MIGRATE_H
19#define MM_MIGRATE_H
20
21#include <linux/cpumask.h>
22#include <hv/hypervisor.h>
23
24/*
25 * This function is used as a helper when setting up the initial
26 * page table (swapper_pg_dir).
27 */
28extern int flush_and_install_context(HV_PhysAddr page_table, HV_PTE access,
29				     HV_ASID asid,
30				     const unsigned long *cpumask);
31
32/*
33 * This function supports migration as a "helper" as follows:
34 *
35 *  - Set the stack PTE itself to "migrating".
36 *  - Do a global TLB flush for (va,length) and the specified ASIDs.
37 *  - Do a cache-evict on all necessary cpus.
38 *  - Write the new stack PTE.
39 *
40 * Note that any non-NULL pointers must not point to the page that
41 * is handled by the stack_pte itself.
42 */
43extern int homecache_migrate_stack_and_flush(pte_t stack_pte, unsigned long va,
44				     size_t length, pte_t *stack_ptep,
45				     const struct cpumask *cache_cpumask,
46				     const struct cpumask *tlb_cpumask,
47				     HV_Remote_ASID *asids,
48				     int asidcount);
49
50#endif /* MM_MIGRATE_H */