typedef struct Conf	Conf;typedef struct FPU	FPU;typedef struct FPenv	FPenv;typedef struct IMM	IMM;typedef struct Irqctl	Irqctl;typedef struct ISAConf	ISAConf;typedef struct Label	Label;typedef struct Lock	Lock;typedef struct Mach	Mach;typedef struct Map	Map;typedef struct Power Power;typedef struct RMap RMap;typedef struct Ureg	Ureg; typedef ulong Instr; #define	MACHP(n)	(n==0? &mach0 : *(Mach**)0) struct	Lock{	ulong	key;	ulong	pc;	ulong	sr;	int	pri;}; struct	Label{	ulong	sp;	ulong	pc;}; /* * Proc.fpstate */enum{	FPINIT,	FPACTIVE,	FPINACTIVE,}; /* * This structure must agree with FPsave and FPrestore asm routines */struct FPenv{	union {		double	fpscrd;		struct {			ulong	pad;			ulong	fpscr;		};	};	int	fpistate;	/* emulated fp */	ulong	emreg[32][3];	/* emulated fp */};/* * This structure must agree with fpsave and fprestore asm routines */struct	FPU{	double	fpreg[32];	FPenv	env;}; struct Conf{	ulong	nmach;		/* processors */	ulong	nproc;		/* processes */	ulong	npage0;		/* total physical pages of memory */	ulong	npage1;		/* total physical pages of memory */	ulong	npage;		/* total physical pages of memory */	ulong	base0;		/* base of bank 0 */	ulong	base1;		/* base of bank 1 */	ulong	ialloc;		/* max interrupt time allocation in bytes */ 	int	nscc;	/* number of SCCs implemented */	ulong	smcuarts;		/* bits for SMCs to define as eiaN */	ulong	sccuarts;		/* bits for SCCs to define as eiaN  */	int	nocts2;	/* CTS2 and CD2 aren't connected */	uchar*	nvrambase;	/* virtual address of nvram */	ulong	nvramsize;	/* size in bytes */}; #include "../port/portdat.h" /* *  machine dependent definitions not used by ../port/dat.h */ struct Mach{	/* OFFSETS OF THE FOLLOWING KNOWN BY l.s */	int	machno;			/* physical id of processor (unused) */	ulong	splpc;			/* pc of last caller to splhi (unused) */	int	mmask;			/* 1<<m->machno (unused) */ 	/* ordering from here on irrelevant */	ulong	ticks;			/* of the clock since boot time */	Proc	*proc;			/* current process on this processor */	Label	sched;			/* scheduler wakeup */	Lock	alarmlock;		/* access to alarm list */	void	*alarm;			/* alarms bound to this clock */	int	nrdy;	int	speed;	/* general system clock in MHz */	long	oscclk;	/* oscillator frequency (MHz) */	long	cpuhz;	/* general system clock (cycles) */	long	clockgen;	/* clock generator frequency (cycles) */	int	cputype;	ulong	delayloop;	ulong*	bcsr;	IMM*	iomem;	/* MPC8xx internal i/o control memory */ 	/* MUST BE LAST */	int	stack[1];};extern	Mach	mach0;  /* *  a parsed .ini line */#define NISAOPT		8 struct ISAConf {	char*	type;	ulong	port;	ulong	irq;	ulong	mem;	int	dma;	ulong	size;	ulong	freq;	uchar	bus; 	int	nopt;	char*	opt[NISAOPT];}; struct Map {	int	size;	ulong	addr;}; struct RMap {	char*	name;	Map*	map;	Map*	mapend; 	Lock;}; struct Power {	Dev*	dev;	int	(*powerdown)(Power*);	int	(*powerup)(Power*);	int	state;	void*	arg;}; extern register Mach	*m;extern register Proc	*up;