typedef struct Alarms Alarms; typedef struct Block Block; typedef struct Chan Chan; typedef struct Cmdbuf Cmdbuf; typedef struct Cmdtab Cmdtab; typedef struct Cname Cname; typedef struct Dev Dev; typedef struct Dirtab Dirtab; typedef struct Egrp Egrp; typedef struct Evalue Evalue; typedef struct Fgrp Fgrp; typedef struct DevConf DevConf; typedef struct Image Image; typedef struct List List; 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 Palloc Palloc; typedef struct Pgrps Pgrps; typedef struct PhysUart PhysUart; typedef struct Pgrp Pgrp; typedef struct Physseg Physseg; typedef struct Proc Proc; typedef struct Pte Pte; typedef struct Pthash Pthash; 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 Session Session; typedef struct Task Task; typedef struct Talarm Talarm; typedef struct Timer Timer; typedef struct Uart Uart; typedef struct Waitq Waitq; typedef struct Walkqid Walkqid; typedef int Devgen(Chan*, char*, Dirtab*, int, int, Dir*); #include 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 Talarm { Lock; Proc *list; }; 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 */ }; enum { BINTR = (1<<0), BFREE = (1<<1), }; struct Block { 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*); ulong flag; }; #define BLEN(s) ((s)->wp - (s)->rp) #define BALLOC(s) ((s)->lim - (s)->base) struct Chan { Ref; Chan* next; /* allocation */ Chan* link; vlong offset; /* in file */ 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 */ ulong mountid; 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 */ Session*session; Cname *name; }; struct Cname { Ref; int alen; /* allocated length */ int len; /* strlen(s) */ char *s; }; 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*); }; 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<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 */ 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 */ Rendez pause; 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 */ Pte *next; /* Free list */ }; /* 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 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]; }; enum { RENDLOG = 5, RENDHASH = 1<rendhash[(s)&((1<mnthash[(qid).path&((1< 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= 1024 }; /* * 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 */ /* buffers */ int (*putc)(Queue*, int); Queue *iq; Queue *oq; uchar istage[Stagesize]; uchar *iw; uchar *ir; uchar *ie; Lock tlock; /* transmit */ uchar ostage[Stagesize]; uchar *op; uchar *oe; int modem; /* hardware flow control on */ int xonoff; /* software flow control on */ int blocked; int cts, dsr, dcd, dcdts; /* keep track of modem status */ int ctsbackoff; int hup_dsr, hup_dcd; /* send hangup upstream? */ int dohup; Rendez r; }; extern Uart* consuart; /* * fasttick timer interrupts (Dummy for now) */ struct Timer { uvlong when; /* fastticks when f should be called */ void (*f)(Ureg*, Timer*); void *a; Timer *next; ulong period; }; #define DEVDOTDOT -1 #pragma varargck argpos print 1 #pragma varargck argpos snprint 3 #pragma varargck argpos sprint 2 #pragma varargck argpos fprint 2 #pragma varargck argpos panic 1 #pragma varargck type "lld" vlong #pragma varargck type "llx" vlong #pragma varargck type "lld" uvlong #pragma varargck type "llx" uvlong #pragma varargck type "lx" void* #pragma varargck type "ld" long #pragma varargck type "lx" long #pragma varargck type "ld" ulong #pragma varargck type "lx" ulong #pragma varargck type "d" int #pragma varargck type "x" int #pragma varargck type "c" int #pragma varargck type "C" int #pragma varargck type "d" uint #pragma varargck type "x" uint #pragma varargck type "c" uint #pragma varargck type "C" uint #pragma varargck type "s" char* #pragma varargck type "S" Rune* #pragma varargck type "r" void #pragma varargck type "%" void #pragma varargck type "I" uchar* #pragma varargck type "V" uchar* #pragma varargck type "E" uchar* #pragma varargck type "M" uchar* #pragma varargck type "p" void* #pragma varargck type "q" char*