blob: 77a743402db40c1e7710fc22d7e4d304955c7da8 [file] [log] [blame]
#ifndef __PPC64_MMU_CONTEXT_H
#define __PPC64_MMU_CONTEXT_H
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <asm/mmu.h>
#include <asm/cputable.h>
* Copyright (C) 2001 PPC 64 Team, IBM Corp
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
* Every architecture must define this function. It's the fastest
* way of searching a 140-bit bitmap where the first 100 bits are
* unlikely to be set. It's guaranteed that at least one of the 140
* bits is cleared.
static inline int sched_find_first_bit(unsigned long *b)
if (unlikely(b[0]))
return __ffs(b[0]);
if (unlikely(b[1]))
return __ffs(b[1]) + 64;
return __ffs(b[2]) + 128;
static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
#define NO_CONTEXT 0
#define MAX_CONTEXT (0x100000-1)
extern int init_new_context(struct task_struct *tsk, struct mm_struct *mm);
extern void destroy_context(struct mm_struct *mm);
extern void switch_stab(struct task_struct *tsk, struct mm_struct *mm);
extern void switch_slb(struct task_struct *tsk, struct mm_struct *mm);
* switch_mm is the entry point called from the architecture independent
* code in kernel/sched.c
static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
struct task_struct *tsk)
if (!cpu_isset(smp_processor_id(), next->cpu_vm_mask))
cpu_set(smp_processor_id(), next->cpu_vm_mask);
/* No need to flush userspace segments if the mm doesnt change */
if (prev == next)
if (cpu_has_feature(CPU_FTR_ALTIVEC))
asm volatile ("dssall");
#endif /* CONFIG_ALTIVEC */
if (cpu_has_feature(CPU_FTR_SLB))
switch_slb(tsk, next);
switch_stab(tsk, next);
#define deactivate_mm(tsk,mm) do { } while (0)
* After we have set current->mm to a new value, this activates
* the context for the new mm so we see the new mappings.
static inline void activate_mm(struct mm_struct *prev, struct mm_struct *next)
unsigned long flags;
switch_mm(prev, next, current);
#endif /* __PPC64_MMU_CONTEXT_H */