Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef __PPC64_MMU_CONTEXT_H |
| 2 | #define __PPC64_MMU_CONTEXT_H |
| 3 | |
| 4 | #include <linux/config.h> |
| 5 | #include <linux/kernel.h> |
| 6 | #include <linux/mm.h> |
| 7 | #include <asm/mmu.h> |
| 8 | #include <asm/cputable.h> |
| 9 | |
| 10 | /* |
| 11 | * Copyright (C) 2001 PPC 64 Team, IBM Corp |
| 12 | * |
| 13 | * This program is free software; you can redistribute it and/or |
| 14 | * modify it under the terms of the GNU General Public License |
| 15 | * as published by the Free Software Foundation; either version |
| 16 | * 2 of the License, or (at your option) any later version. |
| 17 | */ |
| 18 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk) |
| 20 | { |
| 21 | } |
| 22 | |
| 23 | #define NO_CONTEXT 0 |
| 24 | #define MAX_CONTEXT (0x100000-1) |
| 25 | |
| 26 | extern int init_new_context(struct task_struct *tsk, struct mm_struct *mm); |
| 27 | extern void destroy_context(struct mm_struct *mm); |
| 28 | |
| 29 | extern void switch_stab(struct task_struct *tsk, struct mm_struct *mm); |
| 30 | extern void switch_slb(struct task_struct *tsk, struct mm_struct *mm); |
| 31 | |
| 32 | /* |
| 33 | * switch_mm is the entry point called from the architecture independent |
| 34 | * code in kernel/sched.c |
| 35 | */ |
| 36 | static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, |
| 37 | struct task_struct *tsk) |
| 38 | { |
| 39 | if (!cpu_isset(smp_processor_id(), next->cpu_vm_mask)) |
| 40 | cpu_set(smp_processor_id(), next->cpu_vm_mask); |
| 41 | |
| 42 | /* No need to flush userspace segments if the mm doesnt change */ |
| 43 | if (prev == next) |
| 44 | return; |
| 45 | |
| 46 | #ifdef CONFIG_ALTIVEC |
| 47 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) |
| 48 | asm volatile ("dssall"); |
| 49 | #endif /* CONFIG_ALTIVEC */ |
| 50 | |
| 51 | if (cpu_has_feature(CPU_FTR_SLB)) |
| 52 | switch_slb(tsk, next); |
| 53 | else |
| 54 | switch_stab(tsk, next); |
| 55 | } |
| 56 | |
| 57 | #define deactivate_mm(tsk,mm) do { } while (0) |
| 58 | |
| 59 | /* |
| 60 | * After we have set current->mm to a new value, this activates |
| 61 | * the context for the new mm so we see the new mappings. |
| 62 | */ |
| 63 | static inline void activate_mm(struct mm_struct *prev, struct mm_struct *next) |
| 64 | { |
| 65 | unsigned long flags; |
| 66 | |
| 67 | local_irq_save(flags); |
| 68 | switch_mm(prev, next, current); |
| 69 | local_irq_restore(flags); |
| 70 | } |
| 71 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | #endif /* __PPC64_MMU_CONTEXT_H */ |