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867e359b CM |
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 | */ | |
28 | extern 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 | */ | |
43 | extern 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 */ |