typedef struct Conf	Conf;typedef struct Confmem	Confmem;typedef struct FPsave	FPsave;typedef struct ISAConf	ISAConf;typedef struct Imap	Imap;typedef struct Label	Label;typedef struct Lock	Lock;typedef struct Mach	Mach;typedef struct Notsave	Notsave;typedef struct PCArch	PCArch;typedef struct PMMU	PMMU;typedef struct Page	Page;typedef struct Pcidev	Pcidev;typedef struct Proc	Proc;typedef struct Sys	Sys;typedef struct Ureg	Ureg;typedef struct Vctl	Vctl;typedef ulong		Tval;typedef ulong		uintmem; #pragma incomplete Ureg#pragma incomplete Imap #define MAXSYSARG	5	/* for mount(fd, mpt, flag, arg, srv) */ /* *  parameters for sysproc.c */#define AOUT_MAGIC	Q_MAGIC /* *  machine dependent definitions used by ../port/dat.h */ struct Lock{	ulong	key;			/* semaphore (non-zero = locked) */	ulong	sr;	ulong	pc;	Proc	*p;	ulong	pid;	ushort	isilock;}; struct Label{	ulong	sp;	ulong	pc;}; /* * Proc.fpstate */enum{	/* Floating point states */	FPinit = 0,	FPactive = 1,	FPinactive = 2,	/* Bit that's or-ed in during note handling (FP is illegal in note handlers) */	FPillegal = 0x100,}; /* * This structure must agree with fpsave and fprestore asm routines */struct FPsave{	double	fpreg[32];	union {		double	fpscrd;		struct {			ulong	pad;			ulong	fpscr;		};	};}; struct Confmem{	uintmem	base;	ulong	npage;	uintptr	kbase;	uintptr	klimit;}; struct Conf{	ulong	nmach;		/* processors */	ulong	nproc;		/* processes */	Confmem	mem[4];		/* physical memory */	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	upages;		/* user page pool */	ulong	nimage;		/* number of page cache image headers */	ulong	nswap;		/* number of swap pages */	int	nswppo;		/* max # of pageouts per segment pass */	ulong	copymode;	/* 0 is copy on write, 1 is copy on reference */	int	monitor;	/* has display? */	uint	ialloc;		/* bytes available for interrupt time allocation */	ulong	pipeqsize;	/* size in bytes of pipe queues */	int	postdawn;	/* mutiprogramming on */}; /* *  mmu goo in the Proc structure */#define NCOLOR 1struct PMMU{	int	mmupid;	Ureg	*mmureg;		/* pointer to ureg structure */}; /* *  things saved in the Proc structure during a notify */struct Notsave{	ulong	UNUSED;}; #include "../port/portdat.h" /* *  machine dependent definitions not used by ../port/dat.h *//* * Fake kmap */typedef	void		KMap;#define	VA(k)		((ulong)(k))#define	kmap(p)		(KMap*)((p)->pa|KZERO)#define	kunmap(k) struct Mach{	/* OFFSETS OF THE FOLLOWING KNOWN BY l.s *//*0x00*/	int	machno;	/* physical id of processor *//*0x04*/	ulong	splpc;	/* pc that called splhi() *//*0x08*/	Proc	*proc;	/* current process on this processor */	/* Debugging/statistics for software TLB in l.s (therefore, also known by l.s) *//*0x0c*/	ulong	tlbfault;	/* type of last miss *//*0x10*/	ulong	imiss;	/* number of instruction misses *//*0x14*/	ulong	dmiss;	/* number of data misses */ 	/* ordering from here on irrelevant */ 	Imap*	imap; 	ulong	ticks;		/* of the clock since boot time */	Label	sched;		/* scheduler wakeup */	Lock	alarmlock;	/* access to alarm list */	void	*alarm;		/* alarms bound to this clock */	int	inclockintr;	int	cputype;	ulong	loopconst;	Perf	perf;		/* performance counters */ 	Proc*	readied;	/* for runproc */	ulong	schedticks;	/* next forced context switch */ 	ulong	clkin;		/* basic clock frequency */	ulong	vco_out;	vlong	cpuhz;	uvlong	cyclefreq;	/* Frequency of user readable cycle counter */	ulong	bushz;	ulong	dechz;	ulong	tbhz;	ulong	cpmhz;		/* communications processor module frequency */	ulong	brghz;		/* baud rate generator frequency */ 	ulong	pcclast;	uvlong	fastclock; 	int	tlbpurge;	/* # of tlb purges */	int	pfault;		/* # of page faults */	int	cs;	int	syscall;	int	load;	int	intr;	int	flushmmu;	/* make current proc flush it's mmu state */	int	ilockdepth; 	ulong	ptabbase;	/* start of page table in kernel virtual space */	int	slotgen;	/* next pte (byte offset) when pteg is full */	int	mmupid;		/* next mmu pid to use */	int	sweepcolor;	int	trigcolor;	Rendez	sweepr; 	ulong	spuriousintr;	int	lastintr; 	/* MUST BE LAST */	int	stack[1];}; struct{	Lock;	short	machs;	short	exiting;	short	ispanic;}active; /* *  a parsed plan9.ini line */#define NISAOPT		8 struct ISAConf {	char	*type;	ulong	port;	int	irq;	ulong	dma;	ulong	mem;	ulong	size;	ulong	freq; 	int	nopt;	char	*opt[NISAOPT];}; struct Vctl {	Vctl*	next;		/* handlers on this vector */ 	char	name[KNAMELEN];	/* of driver */	int	isintr;		/* interrupt or fault/trap */	int	irq; 	void	(*f)(Ureg*, void*);	/* handler to call */	void*	a;		/* argument to call it with */}; extern Mach mach0; extern register Mach *m;extern register Proc *up; extern FPsave initfp;