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#ifndef __M68K_MMU_CONTEXT_H
#define __M68K_MMU_CONTEXT_H
 
#include <linux/config.h>
 
static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk, unsigned cpu)
{
}
 
#ifndef CONFIG_SUN3
 
#include <asm/setup.h>
#include <asm/page.h>
#include <asm/pgalloc.h>
 
static inline int init_new_context(struct task_struct *tsk,
				   struct mm_struct *mm)
{
	mm->context = virt_to_phys(mm->pgd);
	return 0;
}
 
#define destroy_context(mm)		do { } while(0)
 
static inline void switch_mm_0230(struct mm_struct *mm)
{
	unsigned long crp[2] = {
		0x80000000 | _PAGE_TABLE, mm->context
	};
	unsigned long tmp;
 
	asm volatile (".chip 68030");
 
	/* flush MC68030/MC68020 caches (they are virtually addressed) */
	asm volatile (
		"movec %%cacr,%0;"
		"orw %1,%0; "
		"movec %0,%%cacr"
		: "=d" (tmp) : "di" (FLUSH_I_AND_D));
 
	/* Switch the root pointer. For a 030-only kernel,
	 * avoid flushing the whole ATC, we only need to
	 * flush the user entries. The 68851 does this by
	 * itself. Avoid a runtime check here.
	 */
	asm volatile (
#ifdef CPU_M68030_ONLY
		"pmovefd %0,%%crp; "
		"pflush #0,#4"
#else
		"pmove %0,%%crp"
#endif
		: : "m" (crp[0]));
 
	asm volatile (".chip 68k");
}
 
static inline void switch_mm_0460(struct mm_struct *mm)
{
	asm volatile (".chip 68040");
 
	/* flush address translation cache (user entries) */
	asm volatile ("pflushan");
 
	/* switch the root pointer */
	asm volatile ("movec %0,%%urp" : : "r" (mm->context));
 
	if (CPU_IS_060) {
		unsigned long tmp;
 
		/* clear user entries in the branch cache */
		asm volatile (
			"movec %%cacr,%0; "
		        "orl %1,%0; "
		        "movec %0,%%cacr"
			: "=d" (tmp): "di" (0x00200000));
	}
 
	asm volatile (".chip 68k");
}
 
static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk, unsigned cpu)
{
	if (prev != next) {
		if (CPU_IS_020_OR_030)
			switch_mm_0230(next);
		else
			switch_mm_0460(next);
	}
}
 
static inline void activate_mm(struct mm_struct *prev_mm,
			       struct mm_struct *next_mm)
{
	next_mm->context = virt_to_phys(next_mm->pgd);
 
	if (CPU_IS_020_OR_030)
		switch_mm_0230(next_mm);
	else
		switch_mm_0460(next_mm);
}
 
#else  /* CONFIG_SUN3 */
#include <asm/sun3mmu.h>
#include <linux/sched.h>
 
extern unsigned long get_free_context(struct mm_struct *mm);
extern void clear_context(unsigned long context);
 
/* set the context for a new task to unmapped */
static inline int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
{
	mm->context = SUN3_INVALID_CONTEXT;
	return 0;
}
 
/* find the context given to this process, and if it hasn't already
   got one, go get one for it. */
static inline void get_mmu_context(struct mm_struct *mm)
{
	if(mm->context == SUN3_INVALID_CONTEXT)
		mm->context = get_free_context(mm);
}
 
/* flush context if allocated... */	
static inline void destroy_context(struct mm_struct *mm)
{
	if(mm->context != SUN3_INVALID_CONTEXT)
		clear_context(mm->context);
}
 
static inline void activate_context(struct mm_struct *mm)
{
	get_mmu_context(mm);
	sun3_put_context(mm->context);
}
 
static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk, unsigned cpu)
{
	activate_context(tsk->mm);
}
 
static inline void activate_mm(struct mm_struct *prev_mm,
			       struct mm_struct *next_mm)
{
	activate_context(next_mm);
}
 
#endif 
#endif