portdat.h

在x86平台上运行不可信任代码的sandbox。

{
	ulong base;
	ulong npage;
};

struct Palloc
{
	Lock lk;
	Pallocmem	mem[4];
	Page	*head;			/* most recently used */
	Page	*tail;			/* least recently used */
	ulong	freecount;		/* how many pages on free list now */
	Page	*pages;			/* array of all pages */
	ulong	user;			/* how many user pages */
	Page	*hash[PGHSIZE];
	Lock	hashlock;
	Rendez	r;			/* Sleep for free mem */
	QLock	pwait;			/* Queue of procs waiting for memory */
};

struct Waitq
{
	Waitmsg	w;
	Waitq	*next;
};

/*
 * fasttick timer interrupts
 */
enum {
	/* Mode */
	Trelative,	/* timer programmed in ns from now */
	Tperiodic,	/* periodic timer, period in ns */
};

struct Timer
{
	/* Public interface */
	int	tmode;		/* See above */
	vlong	tns;		/* meaning defined by mode */
	void	(*tf)(Ureg*, Timer*);
	void	*ta;
	/* Internal */
	Lock lk;
	Timers	*tt;		/* Timers queue this timer runs on */
	Tval	tticks;		/* tns converted to ticks */
	Tval	twhen;		/* ns represented in fastticks */
	Timer	*tnext;
};
// Plan 9 VX added for help with FreeBSD
#undef RFNAMEG
#undef RFENVG
#undef RFFDG
#undef RFPROC
#undef RFMEM
#undef RFNOWAIT
#undef RFCNAMEG
#undef RFCENVG
#undef RFCFDG
#undef RFREND
#undef RFNOMNT
#undef RFNOTEG


enum
{
	RFNAMEG		= (1<<0),
	RFENVG		= (1<<1),
	RFFDG		= (1<<2),
	RFNOTEG		= (1<<3),
	RFPROC		= (1<<4),
	RFMEM		= (1<<5),
	RFNOWAIT	= (1<<6),
	RFCNAMEG	= (1<<10),
	RFCENVG		= (1<<11),
	RFCFDG		= (1<<12),
	RFREND		= (1<<13),
	RFNOMNT		= (1<<14),
};

/*
 *  process memory segments - NSEG always last !
 */
enum
{
	SSEG, TSEG, DSEG, BSEG, ESEG, LSEG, SEG1, SEG2, SEG3, SEG4, NSEG
};

enum
{
	Dead = 0,		/* Process states */
	Moribund,
	Ready,
	Scheding,
	Running,
	Queueing,
	QueueingR,
	QueueingW,
	Wakeme,
	Broken,
	Stopped,
	Rendezvous,
	Waitrelease,

	Proc_stopme = 1, 	/* devproc requests */
	Proc_exitme,
	Proc_traceme,
	Proc_exitbig,
	Proc_tracesyscall,

	TUser = 0, 		/* Proc.time */
	TSys,
	TReal,
	TCUser,
	TCSys,
	TCReal,

	NERR = 64,
	NNOTE = 5,

	Npriq		= 20,		/* number of scheduler priority levels */
	Nrq		= Npriq+2,	/* number of priority levels including real time */
	PriRelease	= Npriq,	/* released edf processes */
	PriEdf		= Npriq+1,	/* active edf processes */
	PriNormal	= 10,		/* base priority for normal processes */
	PriExtra	= Npriq-1,	/* edf processes at high best-effort pri */
	PriKproc	= 13,		/* base priority for kernel processes */
	PriRoot		= 13,		/* base priority for root processes */
};

struct Schedq
{
	Lock lk;
	Proc*	head;
	Proc*	tail;
	int	n;
};

struct Proc
{
	Label	sched;		/* known to l.s */
	char	*kstack;	/* known to l.s */
	Mach	*mach;		/* machine running this proc */
	char	*text;
	char	*user;
	char	*args;
	int	nargs;		/* number of bytes of args */
	Proc	*rnext;		/* next process in run queue */
	Proc	*qnext;		/* next process on queue for a QLock */
	QLock	*qlock;		/* addr of qlock being queued for DEBUG */
	int	state;
	char	*psstate;	/* What /proc/#/status reports */
	Segment	*seg[NSEG];
	QLock	seglock;	/* locked whenever seg[] changes */
	ulong	pid;
	ulong	noteid;		/* Equivalent of note group */
	Proc	*pidhash;	/* next proc in pid hash */

	Lock	exl;		/* Lock count and waitq */
	Waitq	*waitq;		/* Exited processes wait children */
	int	nchild;		/* Number of living children */
	int	nwait;		/* Number of uncollected wait records */
	QLock	qwaitr;
	Rendez	waitr;		/* Place to hang out in wait */
	Proc	*parent;

	Pgrp	*pgrp;		/* Process group for namespace */
	Egrp 	*egrp;		/* Environment group */
	Fgrp	*fgrp;		/* File descriptor group */
	Rgrp	*rgrp;		/* Rendez group */

	Fgrp	*closingfgrp;	/* used during teardown */

	ulong	parentpid;
	ulong	time[6];	/* User, Sys, Real; child U, S, R */

	uvlong	kentry;		/* Kernel entry time stamp (for profiling) */
	/*
	 * pcycles: cycles spent in this process (updated on procsave/restore)
	 * when this is the current proc and we're in the kernel
	 * (procrestores outnumber procsaves by one)
	 * the number of cycles spent in the proc is pcycles + cycles()
	 * when this is not the current process or we're in user mode
	 * (procrestores and procsaves balance), it is pcycles.
	 */
	vlong	pcycles;

	int	insyscall;
	int	fpstate;

	QLock	debug;		/* to access debugging elements of User */
	Proc	*pdbg;		/* the debugging process */
	ulong	procmode;	/* proc device file mode */
	ulong	privatemem;	/* proc does not let anyone read mem */
	int	hang;		/* hang at next exec for debug */
	int	procctl;	/* Control for /proc debugging */
	ulong	pc;		/* DEBUG only */

	Lock	rlock;		/* sync sleep/wakeup with postnote */
	Rendez	*r;		/* rendezvous point slept on */
	Rendez	sleep;		/* place for syssleep/debug */
	int	notepending;	/* note issued but not acted on */
	int	kp;		/* true if a kernel process */
	Proc	*palarm;	/* Next alarm time */
	ulong	alarm;		/* Time of call */
	int	newtlb;		/* Pager has changed my pte's, I must flush */
	int	noswap;		/* process is not swappable */

	uintptr	rendtag;	/* Tag for rendezvous */
	uintptr	rendval;	/* Value for rendezvous */
	Proc	*rendhash;	/* Hash list for tag values */

	Timer timer;			/* For tsleep and real-time */
	Rendez	*trend;
	int	(*tfn)(void*);
	void	(*kpfun)(void*);
	void	*kparg;

	FPsave	fpsave;		/* address of this is known by db */
	int	scallnr;	/* sys call number - known by db */
	Sargs	s;		/* address of this is known by db */
	int	nerrlab;
	Label	errlab[NERR];
	char	*syserrstr;	/* last error from a system call, errbuf0 or 1 */
	char	*errstr;	/* reason we're unwinding the error stack, errbuf1 or 0 */
	char	errbuf0[ERRMAX];
	char	errbuf1[ERRMAX];
	char	genbuf[128];	/* buffer used e.g. for last name element from namec */
	Chan	*slash;
	Chan	*dot;

	Note	note[NNOTE];
	short	nnote;
	short	notified;	/* sysnoted is due */
	Note	lastnote;
	ulong	notify;

	Lock	*lockwait;
	Lock	*lastlock;	/* debugging */
	Lock	*lastilock;	/* debugging */

	Mach	*wired;
	Mach	*mp;		/* machine this process last ran on */
	Ref	nlocks;		/* number of locks held by proc */
	ulong	delaysched;
	ulong	priority;	/* priority level */
	ulong	basepri;	/* base priority level */
	uchar	fixedpri;	/* priority level deson't change */
	ulong	cpu;		/* cpu average */
	ulong	lastupdate;
	uchar	yield;		/* non-zero if the process just did a sleep(0) */
	ulong	readytime;	/* time process came ready */
	ulong	movetime;	/* last time process switched processors */
	int	preempted;	/* true if this process hasn't finished the interrupt
				 *  that last preempted it
				 */
	Edf	*edf;		/* if non-null, real-time proc, edf contains scheduling params */
	int	trace;		/* process being traced? */

	ulong	qpc;		/* pc calling last blocking qlock */

	int	setargs;

	ulong ureg;		/* User registers for notes */
	void	*dbgreg;	/* User registers for devproc */
	Notsave notsave;

	/*
	 *  machine specific MMU
	 */
	PMMU pmmu;
};

enum
{
	PRINTSIZE =	256,
	MAXCRYPT = 	127,
	NUMSIZE	=	12,		/* size of formatted number */
	MB =		(1024*1024),
	READSTR =	1000,		/* temporary buffer size for device reads */
};

extern	Conf	conf;
extern	char*	conffile;
extern	int	cpuserver;
extern	Dev*	devtab[];
extern	char*	eve;
extern	char	hostdomain[];
extern	uchar	initcode[];
extern	int	kbdbuttons;
extern	Queue*	kbdq;
extern	Queue*	kprintoq;
extern 	Ref	noteidalloc;
extern	int	nsyscall;
extern	Palloc	palloc;
extern	Queue*	serialoq;
extern	char*	statename[];
extern	Image	swapimage;
extern	char*	sysname;
extern	uint	qiomaxatomic;

enum
{
	LRESPROF	= 3,
};

/*
 *  action log
 */
struct Log {
	Lock lk;
	int	opens;
	char*	buf;
	char	*end;
	char	*rptr;
	int	len;
	int	nlog;
	int	minread;

	int	logmask;	/* mask of things to debug */

	QLock	readq;
	Rendez	readr;
};

struct Logflag {
	char*	name;
	int	mask;
};

enum
{
	NCMDFIELD = 128
};

struct Cmdbuf
{
	char	*buf;
	char	**f;
	int	nf;
};

struct Cmdtab
{
	int	index;	/* used by client to switch on result */
	char	*cmd;	/* command name */
	int	narg;	/* expected #args; 0 ==> variadic */
};

/*
 *  routines to access UART hardware
 */
struct PhysUart
{
	char*	name;
	Uart*	(*pnp)(void);
	void	(*enable)(Uart*, int);
	void	(*disable)(Uart*);
	void	(*kick)(Uart*);
	void	(*dobreak)(Uart*, int);
	int	(*baud)(Uart*, int);
	int	(*bits)(Uart*, int);
	int	(*stop)(Uart*, int);
	int	(*parity)(Uart*, int);
	void	(*modemctl)(Uart*, int);
	void	(*rts)(Uart*, int);
	void	(*dtr)(Uart*, int);
	long	(*status)(Uart*, void*, long, long);
	void	(*fifo)(Uart*, int);
	void	(*power)(Uart*, int);
	int	(*getc)(Uart*);	/* polling versions, for iprint, rdb */
	void	(*putc)(Uart*, int);
};

enum {
	Stagesize=	2048
};

/*
 *  software UART
 */
struct Uart
{
	void*	regs;			/* hardware stuff */
	void*	saveregs;		/* place to put registers on power down */
	char*	name;			/* internal name */
	ulong	freq;			/* clock frequency */
	int	bits;			/* bits per character */
	int	stop;			/* stop bits */
	int	parity;			/* even, odd or no parity */
	int	baud;			/* baud rate */
	PhysUart*phys;
	int	console;		/* used as a serial console */
	int	special;		/* internal kernel device */
	Uart*	next;			/* list of allocated uarts */

	QLock lk;
	int	type;			/* ?? */
	int	dev;
	int	opens;

	int	enabled;
	Uart	*elist;			/* next enabled interface */

	int	perr;			/* parity errors */
	int	ferr;			/* framing errors */
	int	oerr;			/* rcvr overruns */
	int	berr;			/* no input buffers */
	int	serr;			/* input queue overflow */

	/* buffers */
	int	(*putc)(Queue*, int);
	Queue	*iq;
	Queue	*oq;

	Lock	rlock;
	uchar	istage[Stagesize];
	uchar	*iw;
	uchar	*ir;
	uchar	*ie;

	Lock	tlock;			/* transmit */
	uchar	ostage[Stagesize];
	uchar	*op;
	uchar	*oe;
	int	drain;

	int	modem;			/* hardware flow control on */
	int	xonoff;			/* software flow control on */
	int	blocked;
	int	cts, dsr, dcd;	/* keep track of modem status */ 
	int	ctsbackoff;
	int	hup_dsr, hup_dcd;	/* send hangup upstream? */
	int	dohup;

	Rendez	r;
};

extern	Uart*	consuart;

/*
 *  performance timers, all units in perfticks
 */
struct Perf
{
	ulong	intrts;		/* time of last interrupt */
	ulong	inintr;		/* time since last clock tick in interrupt handlers */
	ulong	avg_inintr;	/* avg time per clock tick in interrupt handlers */
	ulong	inidle;		/* time since last clock tick in idle loop */
	ulong	avg_inidle;	/* avg time per clock tick in idle loop */
	ulong	last;		/* value of perfticks() at last clock tick */
	ulong	period;		/* perfticks() per clock tick */
};

struct Watchdog
{
	void	(*enable)(void);	/* watchdog enable */
	void	(*disable)(void);	/* watchdog disable */
	void	(*restart)(void);	/* watchdog restart */
	void	(*stat)(char*, char*);	/* watchdog statistics */
};


/* queue state bits,  Qmsg, Qcoalesce, and Qkick can be set in qopen */
enum
{
	/* Queue.state */
	Qstarve		= (1<<0),	/* consumer starved */
	Qmsg		= (1<<1),	/* message stream */
	Qclosed		= (1<<2),	/* queue has been closed/hungup */
	Qflow		= (1<<3),	/* producer flow controlled */
	Qcoalesce	= (1<<4),	/* coallesce packets on read */
	Qkick		= (1<<5),	/* always call the kick routine after qwrite */
};


#define DEVDOTDOT -1


void	printmap(void);	// Plan 9 VX