typedef struct Conf	Conf;typedef struct Confmem	Confmem;typedef struct KMap 	KMap;typedef struct Label	Label;typedef struct Lock	Lock;typedef struct MKMAP	MKMAP;typedef struct Mach	Mach;typedef u32int Mreg;				/* Msr - bloody UART */typedef struct Page	Page;typedef struct PFPU	PFPU;typedef struct PMMU	PMMU;typedef struct PNOTIFY	PNOTIFY;typedef struct Proc	Proc;typedef struct Softtlb	Softtlb;typedef struct Sys	Sys;typedef struct Tlb	Tlb;typedef struct Ureg	Ureg; #pragma incomplete Ureg #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/portdat.h */struct Lock{	u32int	key;	Mreg	sr;	uintptr	pc;	Proc*	p;	Mach*	m;	int	isilock;}; struct Label{	Mreg	sp;	Mreg	pc;}; /* * emulated floating point */struct PFPU{	union{		uchar	fpusave[33*sizeof(double)];		struct{			double	fpreg[32];			u32int	pad;			u32int	fpscr;		};	};	int	fpustate;}; /* * PFPU.status */enum{	FPinit,	FPactive,	FPinactive,}; struct Confmem{	ulong	base;	ulong	npage;	ulong	kbase;	ulong	klimit;}; struct Conf{	ulong	nmach;		/* processors */	ulong	nproc;		/* processes */	Confmem	mem[4];	ulong	npage;		/* total physical pages of memory */	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 */	ulong	ialloc;		/* bytes available for interrupt time allocation */	ulong	pipeqsize;	/* size in bytes of pipe queues */}; /* *  mmu goo in the Proc structure */#define NCOLOR 1 struct PMMU{	int	mmupid[MAXMACH];		/* pidonmach */ 	int	cnk;				/* CNK emulation */	int	cnkexec;	void*	cnkenv;	/* Segments don't exist here */	void *heapseg;}; /* *  things saved in the Proc structure during a notify */struct PNOTIFY{	void	emptiness;}; #include "../port/portdat.h" /* *  machine dependent definitions not used by ../port/portdat.h */struct KMap {	Ref;	uintptr	va;	uintptr	pa;	usize	sz;				/* not yet */	KMap*	next;	KMap*	kmonmach[MAXMACH];	Page*	pg;	uintptr	pc;}; struct MKMAP {	int	kmtlblo;	int	kmtlbhi; 	KMap*	kmactive;			/* active on this machine */	uchar	kmtlbx[NTLB];			/* tlb index used for kmap */	uchar	kmtlbnext;}; #define VA(k)		((k)->va) struct Mach{	/* OFFSETS OF THE FOLLOWING KNOWN BY l.s */	int	machno;			/* physical id of processor [0*4] */	uintptr	splpc;			/* pc that called splhi() [1*4] */	Proc	*proc;			/* current process on this processor [2*4] */	Softtlb*stlb;			/* software tlb cache [3*4] */	int	utlbhi;			/* lowest tlb index in use by kernel [4*4] */	int	utlbnext;		/* next tlb entry to use for user (round robin) [5*4] */	int	tlbfault;		/* number of tlb i/d misses [6*4] */ 	/* ordering from here on irrelevant */ 	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; 	Proc*	readied;		/* for runproc */	ulong	schedticks;		/* next forced context switch */ 	vlong	cpuhz;			/* general system clock (cycles) */	long	cpumhz;	vlong	clockgen;		/* clock generator frequency (cycles) */	uint	delayloop;	uvlong	cyclefreq;		/* frequency of user readable cycle clock */ 	uint	cputype;	int	chatty;			/* can print on console */ 	uvlong	fastclock;	Perf	perf;			/* performance counters */ 	int	tlbpurge;		/* ... */	int	pfault;	int	cs;	int	syscall;	int	load;	int	intr;	int	mmuflush;		/* make current proc flush its mmu state */	int	ilockdepth; 	int	lastpid;		/* last TLB pid allocated on this machine */	QLock	stlblock;		/* prevent context switch during tlb update */	Proc*	pidproc[NTLBPID];	/* which proc owns a given pid */ 	MKMAP; 	/* MUST BE LAST */	uchar	stack[];}; struct Tlb {	u32int	hi;	u32int	md;	u32int	lo;}; struct Softtlb {	u32int	hi;	/* tlb hi, except that low order 10 bits have (pid[8]<<2) */	u32int	mid;	u32int	lo;}; Lock phystlblock;int phystlbhi;Tlb phystlb[9]; struct Sys {					/*  */	u32int	vectorbase[16*KiB/sizeof(u32int)];	union {		Mach	mach;		uchar	machpage[MACHSIZE];	} machbase[MAXMACH]; 	int	ncores;	uint	coremask; 	u32int	mhz;				/* FreqMHz */	u16int	mb;				/* DDRSizeMB */	u32int	tom;				/* top of memory in Mbytes */	u32int	block;				/* BlockID */	u32int	config;				/* NodeConfig */ 	int	ionode;				/* Is I/O Node */ 	u8int	x;				/* [XYZ]Coord */	u8int	y;	u8int	z;	u8int	nx;				/* [XYZ]Nodes */	u8int	ny;	u8int	nz; 	int	yspan;	int	zspan;	int	nxyz;				/* Number of Compute Nodes */ 	u32int	iop2paddr;			/* PSet I/O Node P2P address */	u8int	iox;				/* PSet I/O Node Coordinate */	u8int	ioy;	u8int	ioz;	u32int	myp2paddr;			/* Compute node P2P address */	u16int	routes[16];			/* TreeRoutes[] */ 	u8int	ea[6];				/* EmacID (Eaddrlen) */	u8int	ipaddr[16];			/* IPAddress (IPaddrlen) */	u8int	ipmask[16];			/* IPNetmask */	u8int	ipbcast[16];			/* IPBroadcast */	u8int	ipgw[16];			/* IPGateway */		u32int	rank;			u32int	pset;			u32int	prank;	u32int	psetsz;	u32int	iorank; 	uchar	memstart[];};extern usize sizeofSys; extern Sys* sys; struct {	Lock;	uint	machs;			/* bitmap of active CPUs */	int	exiting;		/* shutdown */	int	ispanic;		/* shutdown in response to a panic */	int	thunderbirdsarego;	/* F.A.B. */} active; extern Mach* machptr[MAXMACH]; #define MACHP(n)	(machptr[n]) extern register Mach*	m;			/* R30 */extern register Proc*	up;			/* R29 */ /* * Horrid. */#ifdef _DBGC_#define DBGFLG		(dbgflg[_DBGC_])#else#define DBGFLG		(0)#endif /* _DBGC_ */ #define DBG(...)	if(!DBGFLG){}else dbgprint(__VA_ARGS__) int vflag;extern char dbgflg[256]; #define dbgprint	print		/* for now */