typedef struct Conf	Conf;typedef struct FPenv	FPenv;typedef struct FPU	FPU;typedef struct Label	Label;typedef struct Lock	Lock;typedef struct Mach	Mach;typedef struct Ureg	Ureg;typedef struct Lance	Lance;typedef struct Lancemem	Lancemem;typedef struct Etherpkt	Etherpkt;typedef struct Lancepkt	Lancepkt; typedef	ulong	Instr; struct Conf{	int	nmach;		/* processors */	int	nproc;		/* processes */	ulong	monitor;	/* graphics monitor id; 0 for none */	char	ss2;		/* is a sparcstation 2 */	char	ss2cachebug;	/* has sparcstation2 cache bug */	int	ncontext;	/* in mmu */	int	vacsize;	/* size of virtual address cache, in bytes */	int	vaclinesize;	/* size of cache line */	ulong	npage0;		/* total physical pages of memory, bank 0 */	ulong	npage1;		/* total physical pages of memory, bank 1 */	ulong	base0;		/* base of bank 0 */	ulong	base1;		/* base of bank 1 */	ulong	ialloc;		/* max interrupt time allocation in bytes */	ulong	npage;		/* total physical pages of memory */	int	copymode;	/* 0 is copy on write, 1 is copy on reference */	ulong	ipif;		/* Ip protocol interfaces */	ulong	ip;		/* Ip conversations per interface */	ulong	arp;		/* Arp table size */	ulong	frag;		/* Ip fragment assemble queue size */};  /* * FPenv.status */enum{	FPINIT,	FPACTIVE,	FPINACTIVE,}; struct	FPenv{	ulong	status;	ulong	pad;}; /* * This structure must agree with fpsave and fprestore asm routines */struct	FPU{ 	double	regs[17];	/* floating point registers */	FPenv	env;}; /* *  machine dependent definitions used by ../port/dat.h */ struct Label{	ulong	sp;	ulong	pc;}; struct Lock{	ulong	key;	ulong	pc;	ulong	sr;	int	pri;}; #include "../port/portdat.h" /* *  machine dependent definitions not used by ../port/dat.h */ struct Mach{	ulong	ticks;			/* of the clock since boot time */	int		machno;			/* physical id of this processor */	Proc	*proc;			/* current process on this processor */	Label	sched;			/* scheduler wakeup */	Lock	alarmlock;		/* access to alarm list */	void	*alarm;			/* alarms bound to this clock */	ulong	*contexts;		/* hardware context table */	ulong	*ctx;			/* the context */	int	fptrap;			/* FP trap occurred while unsave */ 	int	nrdy; 	int	stack[1];}; /* * XXX - Eric: It just works.... */ /* *  LANCE CSR3 (bus control bits) */#define BSWP	0x4#define ACON	0x2#define BCON	0x1 struct Lancepkt{	uchar	d[6];	uchar	s[6];	uchar	type[2];	uchar	data[1500];	uchar	crc[4];}; /* *  system dependent lance stuff *  filled by lancesetup()  */struct Lance{	ushort	lognrrb;	/* log2 number of receive ring buffers */	ushort	logntrb;	/* log2 number of xmit ring buffers */	ushort	nrrb;		/* number of receive ring buffers */	ushort	ntrb;		/* number of xmit ring buffers */	ushort	*rap;		/* lance address register */	ushort	*rdp;		/* lance data register */	ushort	busctl;		/* bus control bits */	uchar	ea[6];		/* our ether addr */	int	sep;		/* separation between shorts in lance ram				    as seen by host */	ushort	*lanceram;	/* start of lance ram as seen by host */	Lancemem *lm;		/* start of lance ram as seen by lance */	Lancepkt *rp;		/* receive buffers (host address) */	Lancepkt *tp;		/* transmit buffers (host address) */	Lancepkt *lrp;		/* receive buffers (lance address) */	Lancepkt *ltp;		/* transmit buffers (lance address) */}; /* * Fake kmap */typedef void		KMap;#define	VA(k)		((ulong)(k))#define	kmap(p)		(KMap*)((p)->pa|KZERO)#define	kunmap(k)#define	MACHP(n)	(n==0? &mach0 : *(Mach**)0) extern Mach *m;extern Proc *up;extern Mach mach0; #define	swcursor	1