Research V7 development

Work on file usr/sys/40/param.h

Co-Authored-By: Dennis Ritchie <dmr@research.uucp>
Synthesized-from: v7

diff --git a/usr/sys/40/param.h b/usr/sys/40/param.h
new file mode 100644 (file)
index 0000000..33ed643
--- /dev/null
+++ b/usr/sys/40/param.h
@@ -0,0 +1,144 @@
+/*
+ * tunable variables
+ */
+
+#define        NBUF    15              /* size of buffer cache */
+#define        NINODE  20              /* number of in core inodes */
+#define        NFILE   20              /* number of in core file structures */
+#define        NMOUNT  2               /* number of mountable file systems */
+#define        MAXMEM  (64*32)         /* max core per process - first # is Kw */
+#define        MAXUPRC 15              /* max processes per user */
+#define        SSIZE   20              /* initial stack size (*64 bytes) */
+#define        SINCR   20              /* increment of stack (*64 bytes) */
+#define        NOFILE  20              /* max open files per process */
+#define        CANBSIZ 256             /* max size of typewriter line */
+#define        CMAPSIZ 20              /* size of core allocation area */
+#define        SMAPSIZ 20              /* size of swap allocation area */
+#define        NCALL   10              /* max simultaneous time callouts */
+#define        NPROC   20              /* max number of processes */
+#define        NTEXT   10              /* max number of pure texts */
+#define        NCLIST  40              /* max total clist size */
+#define        HZ      60              /* Ticks/second of the clock */
+#define        TIMEZONE (5*60)         /* Minutes westward from Greenwich */
+#define        DSTFLAG 1               /* Daylight Saving Time applies in this locality */
+#define        MSGBUFS 128             /* Characters saved from error messages */
+#define        NCARGS  5120            /* # characters in exec arglist */
+
+/*
+ * priorities
+ * probably should not be
+ * altered too much
+ */
+
+#define        PSWP    0
+#define        PINOD   10
+#define        PRIBIO  20
+#define        PZERO   25
+#define        NZERO   20
+#define        PPIPE   26
+#define        PWAIT   30
+#define        PSLEP   40
+#define        PUSER   50
+
+/*
+ * signals
+ * dont change
+ */
+
+#define        NSIG    17
+/*
+ * No more than 16 signals (1-16) because they are
+ * stored in bits in a word.
+ */
+#define        SIGHUP  1       /* hangup */
+#define        SIGINT  2       /* interrupt (rubout) */
+#define        SIGQUIT 3       /* quit (FS) */
+#define        SIGINS  4       /* illegal instruction */
+#define        SIGTRC  5       /* trace or breakpoint */
+#define        SIGIOT  6       /* iot */
+#define        SIGEMT  7       /* emt */
+#define        SIGFPT  8       /* floating exception */
+#define        SIGKIL  9       /* kill, uncatchable termination */
+#define        SIGBUS  10      /* bus error */
+#define        SIGSEG  11      /* segmentation violation */
+#define        SIGSYS  12      /* bad system call */
+#define        SIGPIPE 13      /* end of pipe */
+#define        SIGCLK  14      /* alarm clock */
+#define        SIGTRM  15      /* Catchable termination */
+
+/*
+ * fundamental constants of the implementation--
+ * cannot be changed easily
+ */
+
+#define        NBPW    sizeof(int)     /* number of bytes in an integer */
+#define        BSIZE   512             /* size of secondary block (bytes) */
+/* BSLOP can be 0 unless you have a TIU/Spider */
+#define        BSLOP   2               /* In case some device needs bigger buffers */
+#define        NINDIR  (BSIZE/sizeof(daddr_t))
+#define        BMASK   0777            /* BSIZE-1 */
+#define        BSHIFT  9               /* LOG2(BSIZE) */
+#define        NMASK   0177            /* NINDIR-1 */
+#define        NSHIFT  7               /* LOG2(NINDIR) */
+#define        USIZE   16              /* size of user block (*64) */
+#define        UBASE   0140000         /* abs. addr of user block */
+#define        NULL    0
+#define        CMASK   0               /* default mask for file creation */
+#define        NODEV   (dev_t)(-1)
+#define        ROOTINO ((ino_t)2)      /* i number of all roots */
+#define        SUPERB  ((daddr_t)1)    /* block number of the super block */
+#define        DIRSIZ  14              /* max characters per directory */
+#define        NICINOD 100             /* number of superblock inodes */
+#define        NICFREE 50              /* number of superblock free blocks */
+#define        INFSIZE 138             /* size of per-proc info for users */
+#define        CBSIZE  6               /* number of chars in a clist block */
+#define        CROUND  07              /* clist rounding: sizeof(int *) + CBSIZE - 1*/
+
+/*
+ * Some macros for units conversion
+ */
+/* Core clicks (64 bytes) to segments and vice versa */
+#define        ctos(x) ((x+127)/128)
+#define stoc(x) ((x)*128)
+
+/* Core clicks (64 bytes) to disk blocks */
+#define        ctod(x) ((x+7)>>3)
+
+/* inumber to disk address */
+#define        itod(x) (daddr_t)((((unsigned)x+15)>>3))
+
+/* inumber to disk offset */
+#define        itoo(x) (int)((x+15)&07)
+
+/* clicks to bytes */
+#define        ctob(x) (x<<6)
+
+/* bytes to clicks */
+#define        btoc(x) ((((unsigned)x+63)>>6))
+
+/* major part of a device */
+#define        major(x)        (int)(((unsigned)x>>8))
+
+/* minor part of a device */
+#define        minor(x)        (int)(x&0377)
+
+/* make a device number */
+#define        makedev(x,y)    (dev_t)((x)<<8 | (y))
+
+typedef        struct { int r[1]; } *  physadr;
+typedef        long            daddr_t;
+typedef char *         caddr_t;
+typedef        unsigned int    ino_t;
+typedef        long            time_t;
+typedef        int             label_t[6];     /* regs 2-7 */
+typedef        int             dev_t;
+typedef        long            off_t;
+
+/*
+ * Machine-dependent bits and macros
+ */
+#define        UMODE   0170000         /* usermode bits */
+#define        USERMODE(ps)    ((ps & UMODE)==UMODE)
+
+#define        INTPRI  0340            /* Priority bits */
+#define        BASEPRI(ps)     ((ps & INTPRI) != 0)