| Chris Metcalf | 867e359 | 2010-05-28 23:09:12 -0400 | [diff] [blame] | 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 */ |