#ifndef __i386_MMU_H
#define __i386_MMU_H

#include <asm/semaphore.h>
/*
 * The i386 doesn't have a mmu context, but
 * we put the segment information here.
 *
 * cpu_vm_mask is used to optimize ldt flushing.
 * exec_limit is used to track the range PROT_EXEC
 * mappings span.
 */
typedef struct { 
	int size;
	struct semaphore sem;
	void *ldt;
	struct desc_struct user_cs;
	unsigned long exec_limit;
	void *vdso;
#ifdef CONFIG_XEN
	int has_foreign_mappings;
#endif
} mm_context_t;

#ifdef CONFIG_XEN
/* mm/memory.c:exit_mmap hook */
extern void _arch_exit_mmap(struct mm_struct *mm);
#define arch_exit_mmap(_mm) _arch_exit_mmap(_mm)

/* kernel/fork.c:dup_mmap hook */
extern void _arch_dup_mmap(struct mm_struct *mm);
#define arch_dup_mmap(mm, oldmm) ((void)(oldmm), _arch_dup_mmap(mm))
#endif /* CONFIG_XEN */

#endif