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 * You must mask ALL interrupts prior to invoking this code, since 29 * you can't legally touch the stack during the cache flush. 30 */ 31 extern int flush_and_install_context(HV_PhysAddr page_table, HV_PTE access, 32 HV_ASID asid, 33 const unsigned long *cpumask); 34 35 /* 36 * This function supports migration as a "helper" as follows: 37 * 38 * - Set the stack PTE itself to "migrating". 39 * - Do a global TLB flush for (va,length) and the specified ASIDs. 40 * - Do a cache-evict on all necessary cpus. 41 * - Write the new stack PTE. 42 * 43 * Note that any non-NULL pointers must not point to the page that 44 * is handled by the stack_pte itself. 45 * 46 * You must mask ALL interrupts prior to invoking this code, since 47 * you can't legally touch the stack during the cache flush. 48 */ 49 extern int homecache_migrate_stack_and_flush(pte_t stack_pte, unsigned long va, 50 size_t length, pte_t *stack_ptep, 51 const struct cpumask *cache_cpumask, 52 const struct cpumask *tlb_cpumask, 53 HV_Remote_ASID *asids, 54 int asidcount); 55 56 #endif /* MM_MIGRATE_H */ 57
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