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- typedef struct Alarms Alarms;
- typedef struct Block Block;
- typedef struct Chan Chan;
- typedef struct Cmdbuf Cmdbuf;
- typedef struct Cmdtab Cmdtab;
- typedef struct Confmem Confmem;
- typedef struct Dev Dev;
- typedef struct Dirtab Dirtab;
- typedef struct Edf Edf;
- typedef struct Egrp Egrp;
- typedef struct Evalue Evalue;
- typedef struct Execvals Execvals;
- typedef struct Fgrp Fgrp;
- typedef struct DevConf DevConf;
- typedef struct Image Image;
- typedef struct Log Log;
- typedef struct Logflag Logflag;
- typedef struct Mntcache Mntcache;
- typedef struct Mount Mount;
- typedef struct Mntrpc Mntrpc;
- typedef struct Mntwalk Mntwalk;
- typedef struct Mnt Mnt;
- typedef struct Mhead Mhead;
- typedef struct Note Note;
- typedef struct Page Page;
- typedef struct Path Path;
- typedef struct Palloc Palloc;
- typedef struct Pallocmem Pallocmem;
- typedef struct Perf Perf;
- typedef struct PhysUart PhysUart;
- typedef struct Pgrp Pgrp;
- typedef struct Physseg Physseg;
- typedef struct Proc Proc;
- typedef struct Pte Pte;
- typedef struct QLock QLock;
- typedef struct Queue Queue;
- typedef struct Ref Ref;
- typedef struct Rendez Rendez;
- typedef struct Rgrp Rgrp;
- typedef struct RWlock RWlock;
- typedef struct Sargs Sargs;
- typedef struct Schedq Schedq;
- typedef struct Segment Segment;
- typedef struct Sema Sema;
- typedef struct Timer Timer;
- typedef struct Timers Timers;
- typedef struct Uart Uart;
- typedef struct Waitq Waitq;
- typedef struct Walkqid Walkqid;
- typedef struct Watchdog Watchdog;
- typedef int Devgen(Chan*, char*, Dirtab*, int, int, Dir*);
- #pragma incomplete DevConf
- #pragma incomplete Edf
- #pragma incomplete Mntcache
- #pragma incomplete Mntrpc
- #pragma incomplete Queue
- #pragma incomplete Timers
- #include <fcall.h>
- #define HOWMANY(x, y) (((x)+((y)-1))/(y))
- #define ROUNDUP(x, y) (HOWMANY((x), (y))*(y)) /* ceiling */
- #define ROUNDDN(x, y) (((x)/(y))*(y)) /* floor */
- #define ROUND(s, sz) (((s)+(sz-1))&~(sz-1))
- #define PGROUND(s) ROUNDUP(s, BY2PG)
- #define MIN(a, b) ((a) < (b)? (a): (b))
- #define MAX(a, b) ((a) > (b)? (a): (b))
- /*
- * For multi-bit fields use FIELD(v, o, w) where 'v' is the value
- * of the bit-field of width 'w' with LSb at bit offset 'o'.
- */
- #define FIELD(v, o, w) (((v) & ((1<<(w))-1))<<(o))
- #define FCLR(d, o, w) ((d) & ~(((1<<(w))-1)<<(o)))
- #define FEXT(d, o, w) (((d)>>(o)) & ((1<<(w))-1))
- #define FINS(d, o, w, v) (FCLR((d), (o), (w))|FIELD((v), (o), (w)))
- #define FSET(d, o, w) ((d)|(((1<<(w))-1)<<(o)))
- #define FMASK(o, w) (((1<<(w))-1)<<(o))
- /* let each port override any of these */
- #ifndef KMESGSIZE
- #define KMESGSIZE (16*1024)
- #endif
- #ifndef PCICONSSIZE
- #define PCICONSSIZE (16*1024)
- #endif
- #ifndef STAGESIZE
- #define STAGESIZE 64
- #endif
- #ifndef MAXBY2PG
- #define MAXBY2PG BY2PG /* rounding for UTZERO in executables */
- #endif
- struct Ref
- {
- Lock;
- long ref;
- };
- struct Rendez
- {
- Lock;
- Proc *p;
- };
- struct QLock
- {
- Lock use; /* to access Qlock structure */
- Proc *head; /* next process waiting for object */
- Proc *tail; /* last process waiting for object */
- int locked; /* flag */
- };
- struct RWlock
- {
- Lock use;
- Proc *head; /* list of waiting processes */
- Proc *tail;
- ulong wpc; /* pc of writer */
- Proc *wproc; /* writing proc */
- int readers; /* number of readers */
- int writer; /* number of writers */
- };
- struct Alarms
- {
- QLock;
- Proc *head;
- };
- struct Sargs
- {
- ulong args[MAXSYSARG];
- };
- /*
- * Access types in namec & channel flags
- */
- enum
- {
- Aaccess, /* as in stat, wstat */
- Abind, /* for left-hand-side of bind */
- Atodir, /* as in chdir */
- Aopen, /* for i/o */
- Amount, /* to be mounted or mounted upon */
- Acreate, /* is to be created */
- Aremove, /* will be removed by caller */
- COPEN = 0x0001, /* for i/o */
- CMSG = 0x0002, /* the message channel for a mount */
- /*rsc CCREATE = 0x0004, /* permits creation if c->mnt */
- CCEXEC = 0x0008, /* close on exec */
- CFREE = 0x0010, /* not in use */
- CRCLOSE = 0x0020, /* remove on close */
- CCACHE = 0x0080, /* client cache */
- };
- /* flag values */
- enum
- {
- BINTR = (1<<0),
- BFREE = (1<<1),
- Bipck = (1<<2), /* ip checksum */
- Budpck = (1<<3), /* udp checksum */
- Btcpck = (1<<4), /* tcp checksum */
- Bpktck = (1<<5), /* packet checksum */
- };
- struct Block
- {
- long ref;
- Block* next;
- Block* list;
- uchar* rp; /* first unconsumed byte */
- uchar* wp; /* first empty byte */
- uchar* lim; /* 1 past the end of the buffer */
- uchar* base; /* start of the buffer */
- void (*free)(Block*);
- ushort flag;
- ushort checksum; /* IP checksum of complete packet (minus media header) */
- };
- #define BLEN(s) ((s)->wp - (s)->rp)
- #define BALLOC(s) ((s)->lim - (s)->base)
- struct Chan
- {
- Ref; /* the Lock in this Ref is also Chan's lock */
- Chan* next; /* allocation */
- Chan* link;
- vlong offset; /* in fd */
- vlong devoffset; /* in underlying device; see read */
- ushort type;
- ulong dev;
- ushort mode; /* read/write */
- ushort flag;
- Qid qid;
- int fid; /* for devmnt */
- ulong iounit; /* chunk size for i/o; 0==default */
- Mhead* umh; /* mount point that derived Chan; used in unionread */
- Chan* umc; /* channel in union; held for union read */
- QLock umqlock; /* serialize unionreads */
- int uri; /* union read index */
- int dri; /* devdirread index */
- uchar* dirrock; /* directory entry rock for translations */
- int nrock;
- int mrock;
- QLock rockqlock;
- int ismtpt;
- Mntcache*mcp; /* Mount cache pointer */
- Mnt* mux; /* Mnt for clients using me for messages */
- union {
- void* aux;
- Qid pgrpid; /* for #p/notepg */
- ulong mid; /* for ns in devproc */
- };
- Chan* mchan; /* channel to mounted server */
- Qid mqid; /* qid of root of mount point */
- Path* path;
- };
- struct Path
- {
- Ref;
- char *s;
- Chan **mtpt; /* mtpt history */
- int len; /* strlen(s) */
- int alen; /* allocated length of s */
- int mlen; /* number of path elements */
- int malen; /* allocated length of mtpt */
- };
- struct Dev
- {
- int dc;
- char* name;
- void (*reset)(void);
- void (*init)(void);
- void (*shutdown)(void);
- Chan* (*attach)(char*);
- Walkqid*(*walk)(Chan*, Chan*, char**, int);
- int (*stat)(Chan*, uchar*, int);
- Chan* (*open)(Chan*, int);
- void (*create)(Chan*, char*, int, ulong);
- void (*close)(Chan*);
- long (*read)(Chan*, void*, long, vlong);
- Block* (*bread)(Chan*, long, ulong);
- long (*write)(Chan*, void*, long, vlong);
- long (*bwrite)(Chan*, Block*, ulong);
- void (*remove)(Chan*);
- int (*wstat)(Chan*, uchar*, int);
- void (*power)(int); /* power mgt: power(1) => on, power (0) => off */
- int (*config)(int, char*, DevConf*); /* returns nil on error */
- /* not initialised */
- int attached; /* debugging */
- };
- struct Dirtab
- {
- char name[KNAMELEN];
- Qid qid;
- vlong length;
- long perm;
- };
- struct Walkqid
- {
- Chan *clone;
- int nqid;
- Qid qid[1];
- };
- enum
- {
- NSMAX = 1000,
- NSLOG = 7,
- NSCACHE = (1<<NSLOG),
- };
- struct Mntwalk /* state for /proc/#/ns */
- {
- int cddone;
- Mhead* mh;
- Mount* cm;
- };
- struct Mount
- {
- ulong mountid;
- Mount* next;
- Mhead* head;
- Mount* copy;
- Mount* order;
- Chan* to; /* channel replacing channel */
- int mflag;
- char *spec;
- };
- struct Mhead
- {
- Ref;
- RWlock lock;
- Chan* from; /* channel mounted upon */
- Mount* mount; /* what's mounted upon it */
- Mhead* hash; /* Hash chain */
- };
- struct Mnt
- {
- Lock;
- /* references are counted using c->ref; channels on this mount point incref(c->mchan) == Mnt.c */
- Chan *c; /* Channel to file service */
- Proc *rip; /* Reader in progress */
- Mntrpc *queue; /* Queue of pending requests on this channel */
- ulong id; /* Multiplexer id for channel check */
- Mnt *list; /* Free list */
- int flags; /* cache */
- int msize; /* data + IOHDRSZ */
- char *version; /* 9P version */
- Queue *q; /* input queue */
- };
- enum
- {
- NUser, /* note provided externally */
- NExit, /* deliver note quietly */
- NDebug, /* print debug message */
- };
- struct Note
- {
- char msg[ERRMAX];
- int flag; /* whether system posted it */
- };
- enum
- {
- PG_NOFLUSH = 0,
- PG_TXTFLUSH = 1, /* flush dcache and invalidate icache */
- PG_DATFLUSH = 2, /* flush both i & d caches (UNUSED) */
- PG_NEWCOL = 3, /* page has been recolored */
- PG_MOD = 0x01, /* software modified bit */
- PG_REF = 0x02, /* software referenced bit */
- };
- struct Page
- {
- Lock;
- ulong pa; /* Physical address in memory */
- ulong va; /* Virtual address for user */
- ulong daddr; /* Disc address on swap */
- ulong gen; /* Generation counter for swap */
- ushort ref; /* Reference count */
- char modref; /* Simulated modify/reference bits */
- char color; /* Cache coloring */
- char cachectl[MAXMACH]; /* Cache flushing control for putmmu */
- Image *image; /* Associated text or swap image */
- Page *next; /* Lru free list */
- Page *prev;
- Page *hash; /* Image hash chains */
- };
- struct Swapalloc
- {
- Lock; /* Free map lock */
- int free; /* currently free swap pages */
- uchar* swmap; /* Base of swap map in memory */
- uchar* alloc; /* Round robin allocator */
- uchar* last; /* Speed swap allocation */
- uchar* top; /* Top of swap map */
- Rendez r; /* Pager kproc idle sleep */
- ulong highwater; /* Pager start threshold */
- ulong headroom; /* Space pager frees under highwater */
- }swapalloc;
- struct Image
- {
- Ref;
- Chan *c; /* channel to text file */
- Qid qid; /* Qid for page cache coherence */
- Qid mqid;
- Chan *mchan;
- ushort type; /* Device type of owning channel */
- Segment *s; /* TEXT segment for image if running */
- Image *hash; /* Qid hash chains */
- Image *next; /* Free list */
- int notext; /* no file associated */
- };
- struct Pte
- {
- Page *pages[PTEPERTAB]; /* Page map for this chunk of pte */
- Page **first; /* First used entry */
- Page **last; /* Last used entry */
- };
- /* Segment types */
- enum
- {
- SG_TYPE = 07, /* Mask type of segment */
- SG_TEXT = 00,
- SG_DATA = 01,
- SG_BSS = 02,
- SG_STACK = 03,
- SG_SHARED = 04,
- SG_PHYSICAL = 05,
- SG_RONLY = 0040, /* Segment is read only */
- SG_CEXEC = 0100, /* Detach at exec */
- };
- #define PG_ONSWAP 1
- #define onswap(s) (((ulong)s)&PG_ONSWAP)
- #define pagedout(s) (((ulong)s)==0 || onswap(s))
- #define swapaddr(s) (((ulong)s)&~PG_ONSWAP)
- #define SEGMAXSIZE (SEGMAPSIZE*PTEMAPMEM)
- struct Physseg
- {
- ulong attr; /* Segment attributes */
- char *name; /* Attach name */
- ulong pa; /* Physical address */
- ulong size; /* Maximum segment size in pages */
- Page *(*pgalloc)(Segment*, ulong); /* Allocation if we need it */
- void (*pgfree)(Page*);
- };
- struct Sema
- {
- Rendez;
- long *addr;
- int waiting;
- Sema *next;
- Sema *prev;
- };
- struct Segment
- {
- Ref;
- QLock lk;
- ushort steal; /* Page stealer lock */
- ushort type; /* segment type */
- ulong base; /* virtual base */
- ulong top; /* virtual top */
- ulong size; /* size in pages */
- ulong fstart; /* start address in file for demand load */
- ulong flen; /* length of segment in file */
- int flushme; /* maintain icache for this segment */
- Image *image; /* text in file attached to this segment */
- Physseg *pseg;
- ulong* profile; /* Tick profile area */
- Pte **map;
- int mapsize;
- Pte *ssegmap[SSEGMAPSIZE];
- Lock semalock;
- Sema sema;
- ulong mark; /* portcountrefs */
- };
- enum
- {
- RENDLOG = 5,
- RENDHASH = 1<<RENDLOG, /* Hash to lookup rendezvous tags */
- MNTLOG = 5,
- MNTHASH = 1<<MNTLOG, /* Hash to walk mount table */
- NFD = 100, /* per process file descriptors */
- PGHLOG = 9,
- PGHSIZE = 1<<PGHLOG, /* Page hash for image lookup */
- };
- #define REND(p,s) ((p)->rendhash[(s)&((1<<RENDLOG)-1)])
- #define MOUNTH(p,qid) ((p)->mnthash[(qid).path&((1<<MNTLOG)-1)])
- struct Pgrp
- {
- Ref; /* also used as a lock when mounting */
- int noattach;
- ulong pgrpid;
- QLock debug; /* single access via devproc.c */
- RWlock ns; /* Namespace n read/one write lock */
- Mhead *mnthash[MNTHASH];
- };
- struct Rgrp
- {
- Ref; /* the Ref's lock is also the Rgrp's lock */
- Proc *rendhash[RENDHASH]; /* Rendezvous tag hash */
- };
- struct Egrp
- {
- Ref;
- RWlock;
- Evalue **ent;
- int nent;
- int ment;
- ulong path; /* qid.path of next Evalue to be allocated */
- ulong vers; /* of Egrp */
- };
- struct Evalue
- {
- char *name;
- char *value;
- int len;
- Evalue *link;
- Qid qid;
- };
- struct Fgrp
- {
- Ref;
- Chan **fd;
- int nfd; /* number allocated */
- int maxfd; /* highest fd in use */
- int exceed; /* debugging */
- };
- enum
- {
- DELTAFD = 20 /* incremental increase in Fgrp.fd's */
- };
- struct Pallocmem
- {
- ulong base;
- ulong npage;
- };
- struct Palloc
- {
- Lock;
- 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;
- Timers *tt; /* Timers queue this timer runs on */
- Tval tticks; /* tns converted to ticks */
- Tval twhen; /* ns represented in fastticks */
- Timer *tnext;
- };
- 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;
- 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 default 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; /* 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;
- int (*notify)(void*, char*);
- 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;
- void *ureg; /* User registers for notes */
- void *dbgreg; /* User registers for devproc */
- Notsave;
- /*
- * machine specific MMU
- */
- PMMU;
- char *syscalltrace; /* syscall trace */
- };
- enum
- {
- PRINTSIZE = 256,
- MAXCRYPT = 127,
- NUMSIZE = 12, /* size of formatted number */
- MB = (1024*1024),
- /* READSTR was 1000, which is way too small for usb's ctl file */
- READSTR = 4000, /* temporary buffer size for device reads */
- };
- struct Execvals {
- uvlong entry;
- ulong textsize;
- ulong datasize;
- };
- 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;
- int (*parseboothdr)(Chan *, ulong, Execvals *);
- extern Queue* serialoq;
- extern char* statename[];
- extern Image swapimage;
- extern char* sysname;
- extern uint qiomaxatomic;
- extern char* sysctab[];
- Watchdog*watchdog;
- int watchdogon;
- enum
- {
- LRESPROF = 3,
- };
- /*
- * action log
- */
- struct Log {
- Lock;
- 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= STAGESIZE
- };
- /*
- * 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;
- 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;
- void (*lprint)(char *, int);
- /*
- * 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), /* coalesce packets on read */
- Qkick = (1<<5), /* always call the kick routine after qwrite */
- };
- #define DEVDOTDOT -1
- #pragma varargck type "I" uchar*
- #pragma varargck type "V" uchar*
- #pragma varargck type "E" uchar*
- #pragma varargck type "M" uchar*
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