/
dat.h
528 lines (480 loc) · 10.8 KB
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dat.h
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typedef struct Alarm Alarm;
typedef struct Blist Blist;
typedef struct Block Block;
typedef struct Chan Chan;
typedef struct Conf Conf;
typedef struct Dev Dev;
typedef struct Dirtab Dirtab;
typedef struct Env Env;
typedef struct Envp Envp;
typedef struct Envval Envval;
typedef struct Error Error;
typedef struct FPsave FPsave;
typedef struct Label Label;
typedef struct List List;
typedef struct Lock Lock;
typedef struct Mach Mach;
typedef struct Mount Mount;
typedef struct Mtab Mtab;
typedef struct Note Note;
typedef struct Orig Orig;
typedef struct PTE PTE;
typedef struct Page Page;
typedef struct Pgrp Pgrp;
typedef struct Proc Proc;
typedef struct QLock QLock;
typedef struct Qinfo Qinfo;
typedef struct Queue Queue;
typedef struct Stream Stream;
typedef struct Ref Ref;
typedef struct Rendez Rendez;
typedef struct Seg Seg;
typedef struct Ureg Ureg;
typedef struct User User;
typedef int Devgen(Chan*, Dirtab*, int, int, Dir*);
struct List
{
void *next;
};
struct Lock
{
ulong *sbsem; /* addr of sync bus semaphore */
ulong pc;
};
struct Ref
{
Lock;
int ref;
};
struct QLock
{
Proc *head; /* next process waiting for object */
Proc *tail; /* last process waiting for object */
Lock use; /* to use object */
Lock queue; /* to access list */
};
struct Label
{
ulong pc;
ulong sp;
};
struct Alarm
{
List;
Lock;
int busy;
long dt; /* may underflow in clock(); must be signed */
void (*f)(void*);
void *arg;
};
#define CHDIR 0x80000000L
#define QPATH 0x0000FFFFL
struct Chan
{
QLock; /* general access */
Ref;
union{
Chan *next; /* allocation */
ulong offset; /* in file */
};
ushort type;
ushort dev;
ushort mode; /* read/write */
ushort flag;
ulong qid;
Mount *mnt; /* mount point that derived Chan */
ulong mountid;
int fid; /* for devmnt */
Stream *stream; /* for stream channels */
};
struct FPsave
{
long fpreg[32];
long fpstatus;
};
struct Conf
{
int nmach; /* processors */
int nproc; /* processes */
int npgrp; /* process groups */
ulong npage; /* total physical pages of memory */
ulong norig; /* origins */
ulong npte; /* contiguous page table entries */
ulong nmod; /* single (modifying) page table entries */
int nalarm; /* alarms */
int nchan; /* channels */
int nenv; /* distinct environment values */
int nenvchar; /* environment text storage */
int npgenv; /* environment files per process group */
int nmtab; /* mounted-upon channels per process group */
int nmount; /* mounts */
int nmntdev; /* mounted devices (devmnt.c) */
int nmntbuf; /* buffers for devmnt.c messages */
int nmnthdr; /* headers for devmnt.c messages */
int nstream; /* streams */
int nqueue; /* stream queues */
int nblock; /* stream blocks */
int nsrv; /* public servers (devsrv.c) */
};
struct Dev
{
void (*reset)(void);
void (*init)(void);
Chan *(*attach)(char*);
Chan *(*clone)(Chan*, Chan*);
int (*walk)(Chan*, char*);
void (*stat)(Chan*, char*);
Chan *(*open)(Chan*, int);
void (*create)(Chan*, char*, int, ulong);
void (*close)(Chan*);
long (*read)(Chan*, void*, long);
long (*write)(Chan*, void*, long);
void (*remove)(Chan*);
void (*wstat)(Chan*, char*);
void (*errstr)(Error*, char*);
void (*userstr)(Error*, char*);
};
struct Dirtab
{
char name[NAMELEN];
long qid;
long length;
long perm;
};
struct Env
{
Lock;
Envval *val;
char name[NAMELEN];
Env *next; /* in chain of Envs for a pgrp */
int pgref; /* # pgrps pointing here */
};
struct Envp
{
Env *env;
int chref; /* # chans from pgrp pointing here */
};
struct Mach
{
int machno; /* physical id of processor */
int mmask; /* 1<<m->machno */
ulong ticks; /* of the clock since boot time */
Proc *proc; /* current process on this processor */
Label sched; /* scheduler wakeup */
Lock alarmlock; /* access to alarm list */
void *alarm; /* alarms bound to this clock */
void (*intr)(ulong); /* pending interrupt */
Proc *intrp; /* process that was interrupted */
ulong cause; /* arg to intr */
char pidhere[NTLBPID]; /* is this pid possibly in this mmu? */
int lastpid; /* last pid allocated on this machine */
Proc *pidproc[NTLBPID]; /* process that owns this tlbpid on this mach */
int stack[1];
};
struct Mount
{
Ref; /* also used as a lock when playing lists */
short term; /* terminates list */
ulong mountid;
Mount *next;
Chan *c; /* channel replacing underlying channel */
};
struct Mtab
{
Chan *c; /* channel mounted upon */
Mount *mnt; /* what's mounted upon it */
};
enum{
NUser, /* note provided externally */
NExit, /* process should exit */
NDebug, /* process should hang */
};
struct Note
{
char msg[ERRLEN];
int flag; /* whether system posted it */
};
struct Orig
{
Lock;
Orig *next; /* for allocation */
ushort nproc; /* processes using it */
ushort npage; /* sum of refs of pages in it */
ushort flag;
ulong va; /* va of 0th pte */
ulong npte; /* #pte's in list */
PTE *pte;
Chan *chan; /* channel deriving segment (if open) */
ushort type; /* of channel (which could be non-open) */
ushort dev;
ulong qid;
ulong minca; /* base of region in chan */
ulong maxca; /* end of region in chan */
};
struct Page
{
Orig *o; /* origin of segment owning page */
ulong va; /* virtual address */
ulong pa; /* physical address */
ushort ref;
Page *next;
Page *prev;
};
struct Pgrp
{
Ref; /* also used as a lock when mounting */
Pgrp *next;
ulong pgrpid;
char user[NAMELEN];
int nmtab; /* highest active mount table entry, +1 */
int nenv; /* highest active env table entry, +1 */
Mtab *mtab;
Envp *etab;
};
struct PTE
{
Proc *proc; /* process owning this PTE (0 in Orig) */
PTE *nextmod; /* next at this va */
PTE *nextva; /* next in this proc at higher va */
Page *page;
};
struct Rendez
{
Lock;
Proc *p;
};
struct Seg
{
Proc *proc; /* process owning this segment */
Orig *o; /* root list of pte's */
ulong minva; /* va of 0th pte (not necessarily Seg->o->va) */
ulong maxva; /* va of last pte */
PTE *mod; /* list of modified pte's */
ulong pad[3]; /**/
};
struct Proc
{
Label sched;
Mach *mach; /* machine running this proc */
char text[NAMELEN];
Proc *rnext; /* next process in run queue */
Proc *qnext; /* next process on queue for a QLock */
int state;
short pidonmach[MAXMACH]; /* TLB pid on each mmu */
Page *upage; /* BUG: should be unlinked from page list */
Seg seg[NSEG];
ulong pid;
int nchild;
QLock wait; /* exiting children to be waited for */
Waitmsg *waitmsg;
Proc *child;
Proc *parent;
Pgrp *pgrp;
ulong parentpid;
ulong time[6]; /* User, Sys, Real; child U, S, R */
short exiting;
short insyscall;
int fpstate;
Lock debug; /* to access debugging elements of User */
Rendez *r; /* rendezvous point slept on */
Rendez sleep; /* place for tsleep and syssleep */
int wokeup; /* whether sleep was interrupted */
ulong pc; /* DEBUG only */
};
#define NERR 15
#define NFD 100
#define NNOTE 5
struct User
{
Proc *p;
Label errlab[NERR];
int nerrlab;
Error error;
FPsave fpsave; /* address of this is known by vdb */
char elem[NAMELEN]; /* last name element from namec */
Chan *slash;
Chan *dot;
Chan *fd[NFD];
int maxfd; /* highest fd in use */
/*
* Rest of structure controlled by devproc.c and friends.
* lock(&p->debug) to modify.
*/
Note note[NNOTE];
short nnote;
short notified; /* sysnoted is due */
int (*notify)(void*, char*);
void *ureg;
};
/*
* operations available to a queue
*/
struct Qinfo
{
void (*iput)(Queue*, Block*); /* input routine */
void (*oput)(Queue*, Block*); /* output routine */
void (*open)(Queue*, Stream*);
void (*close)(Queue*);
char *name;
};
/*
* We reference lance buffers via descriptors kept in host memory
*/
struct Block
{
Block *next;
uchar *rptr; /* first unconsumed byte */
uchar *wptr; /* first empty byte */
uchar *lim; /* 1 past the end of the buffer */
uchar *base; /* start of the buffer */
uchar flags;
uchar type;
};
/* flag bits */
#define S_DELIM 0x80
#define S_CLASS 0x07
/* type values */
#define M_DATA 0
#define M_CTL 1
#define M_HANGUP 2
/*
* a list of blocks
*/
struct Blist {
Lock;
Block *first; /* first data block */
Block *last; /* last data block */
long len; /* length of list in bytes */
};
/*
* a queue of blocks
*/
struct Queue {
Blist;
int flag;
Qinfo *info; /* line discipline definition */
Queue *other; /* opposite direction, same line discipline */
Queue *next; /* next queue in the stream */
void (*put)(Queue*, Block*);
Rendez r;
void *ptr; /* private info for the queue */
};
#define QHUNGUP 0x1 /* flag bit meaning the stream has been hung up */
#define QINUSE 0x2
#define QHIWAT 0x4 /* queue has gone past the high water mark */
/*
* a stream head
*/
struct Stream {
Lock; /* structure lock */
int inuse; /* use count */
int type; /* correclation with Chan */
int dev; /* ... */
int id; /* ... */
QLock rdlock; /* read lock */
QLock wrlock; /* write lock */
Queue *procq; /* write queue at process end */
Queue *devq; /* read queue at device end */
char tag[32]; /* when reading the tag qid */
};
#define RD(q) ((q)->other < (q) ? (q->other) : q)
#define WR(q) ((q)->other > (q) ? (q->other) : q)
#define GLOBAL(a) (((ulong)(a)) & 0x80000000)
#define STREAMTYPE(x) ((x)&0x1f)
#define STREAMID(x) (((x)&~CHDIR)>>5)
#define STREAMQID(i,t) (((i)<<5)|(t))
#define PUTNEXT(q,b) (*(q)->next->put)((q)->next, bp)
/*
* stream file qid's & high water mark
*/
enum {
Shighqid = STREAMQID(1,0) - 1,
Sdataqid = Shighqid,
Sctlqid = Sdataqid-1,
Slowqid = Sctlqid,
Streamhi= (32*1024), /* stream high water mark */
};
#define PRINTSIZE 256
struct
{
Lock;
short machs;
short exiting;
}active;
extern register Mach *m;
extern register User *u;
/*
* Process states
*/
enum
{
Dead = 0,
Moribund,
Zombie,
Ready,
Scheding,
Running,
Queueing,
MMUing,
Exiting,
Inwait,
Wakeme,
Broken,
};
extern char *statename[];
/*
* Chan flags
*/
#define COPEN 1 /* for i/o */
#define CMOUNT 2 /* is result of a mount/bind */
#define CCREATE 4 /* permits creation if CMOUNT */
/*
* Proc.time
*/
enum
{
TUser,
TSys,
TReal,
TCUser,
TCSys,
TCReal,
};
/*
* floating point registers
*/
enum
{
FPinit,
FPactive,
FPinactive,
};
/*
* Memory management
*/
#define SSEG 0
#define TSEG 1
#define DSEG 2
#define BSEG 3
#define ESEG 4 /* used by exec to build new stack */
#define OWRPERM 0x01 /* write permission */
#define OPURE 0x02 /* original data mustn't be written */
#define OCACHED 0x04 /* cached; don't discard on exit */
/*
* Access types in namec
*/
enum
{
Aaccess, /* as in access, stat */
Atodir, /* as in chdir */
Aopen, /* for i/o */
Amount, /* to be mounted upon */
Acreate, /* file is to be created */
};
#define NUMSIZE 12 /* size of formatted number */
#define MACHP(n) ((Mach *)(MACHADDR+n*BY2PG))
extern Conf conf;
extern ulong initcode[];
extern Dev devtab[];
extern char devchar[];
extern FPsave initfp;