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typedef struct Conf	Conf;
typedef struct FFrame	FFrame;
typedef struct FPsave	FPsave;
typedef struct Label	Label;
typedef struct Lock	Lock;
typedef struct Mach	Mach;
typedef struct Page	Page;
typedef struct PMMU	PMMU;
typedef struct Portpage	Portpage;
typedef struct Ureg	Ureg;
typedef struct User	User;

#define	MACHP(n)	(n==0? &mach0 : *(Mach**)0)

extern	Mach	mach0;
extern  void	(*kprofp)(ulong);

/*
 *  parameters for sysproc.c
 */
#define AOUT_MAGIC	A_MAGIC

struct Lock
{
	char	key;
	ulong	pc;
	ulong	sr;
};

struct Label
{
	ulong	sp;
	ulong	pc;
	ushort	sr;
};

/*
 * floating point registers
 */
enum
{
	FPinit,
	FPactive,
	FPdirty,
};

struct	FPsave
{
	uchar	type;
	uchar	size;
	short	reserved;
	char	junk[212];	/* 68881: sizes 24, 180; 68882: 56, 212 */
	/* this offset known in db */
	union{
	char	reg[3*4+8*12];
	struct{
		ulong	fpcr;
		ulong	fpsr;
		ulong	fpiar;
		struct{
			ulong	d[3];
		}dreg[8];
	};
	};
};

struct Conf
{
	int	nmach;		/* processors */
	int	nproc;		/* processes */
	int	monitor;	/* has display */
	ulong	npage0;		/* total physical pages of memory, bank 0 */
	ulong	npage1;		/* total physical pages of memory, bank 1 */
	ulong	npage;
	ulong	base0;		/* base of bank 0 */
	ulong	base1;		/* base of bank 1 */
	ulong	upages;		/* user page pool */
	ulong	nimage;		/* number of page cache image headers */
	ulong	nswap;		/* number of swap blocks */
	int	copymode;	/* 0 is copy on write, 1 is copy on reference */
	int	portispaged;	/*

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