From: Ken Thompson <ken@research.uucp>
Date: Sat, 24 Feb 1979 14:36:01 +0000 (-0500)
Subject: Research V7 development
X-Git-Tag: Bell-32V^2~135
X-Git-Url: https://git.subgeniuskitty.com/unix-history/.git/commitdiff_plain/e976a5e8b34f9461e832ab6f9b4d2c0cfcb66df0?ds=inline

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
index 0000000000..33ed643500
--- /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)