V4/nsys/ken/main.c

#include "/sys/nsys/param.h"
#include "/sys/nsys/user.h"
#include "/sys/nsys/systm.h"
#include "/sys/nsys/proc.h"
#include "/sys/nsys/text.h"
#include "/sys/nsys/inode.h"

#define	KISA	0172340
#define	UISD	0177600
#define	UISA	0177640
#define	RO	02
#define	RW	06
#define	WO	04
#define	ED	010
struct	{
	int	integ;
};
struct {
	int	r[8];
};
int	icode[]
{
	0104413,
	0000014,
	0000010,
	0000777,
	0000014,
	0000000,
	0062457,
	0061564,
	0064457,
	0064556,
	0000164,
	-1
};

main()
{
	extern schar;
	extern char end[], data[], etext[];
	int i, i1, *p;

	/*
	 * zero and free all of core
	 */

	UISA->r[0] = KISA->r[6] + USIZE;
	UISD->r[0] = 6;
	for(; fubyte(0) >= 0; UISA->r[0]++) {
		clearseg(UISA->r[0]);
		mfree(coremap, 1, UISA->r[0]);
	}
	mfree(swapmap, NSWAP, SWPLO);

	/*
	 * set up system process
	 */

	proc[0].p_addr = KISA->r[6];
	proc[0].p_size = USIZE;
	proc[0].p_stat = SRUN;
	proc[0].p_flag =| SLOAD|SSYS;
	u.u_procp = &proc[0];

	/*
	 * set up 'known' i-nodes
	 */

	sureg();
	LKS->integ = 0115;
	cinit();
	binit();
	iinit();
	rootdir = iget(ROOTDEV, ROOTINO);
	rootdir->i_flag =& ~ILOCK;
	u.u_cdir = iget(ROOTDEV, ROOTINO);
	u.u_cdir->i_flag =& ~ILOCK;

	/*
	 * make init process
	 * enter scheduling loop
	 * with system process
	 */

	if(newproc()) {
		expand(USIZE+1);
		u.u_uisa[0] = USIZE;
		u.u_uisd[0] = 6;
		sureg();
		for(i=0; icode[i] != -1; i++)
			suword(i*2, icode[i]);
		return;
	}
	sched();
}

sureg()
{
	register *up, *rp, a;

	a = u.u_procp->p_addr;
	up = &u.u_uisa[0];
	rp = &UISA->r[0];
	while(rp < &UISA->r[8])
		*rp++ = *up++ + a;
	if((up=u.u_procp->p_textp) != NULL)
		a =- up->x_caddr;
	up = &u.u_uisd[0];
	rp = &UISD->r[0];
	while(rp < &UISD->r[8]) {
		*rp = *up++;
		if((*rp++ & WO) == 0)
			rp[(UISA-UISD)/2-1] =- a;
	}
}

estabur(nt, nd, ns)
{
	register a, *ap, *dp;

	if(nseg(nt)+nseg(nd)+nseg(ns) > 8 || nt+nd+ns > MAXMEM) {
		u.u_error = ENOMEM;
		return(-1);
	}
	a = 0;
	ap = &u.u_uisa[0];
	dp = &u.u_uisd[0];
	while(nt >= 128) {
		*dp++ = (127<<8) | RO;
		*ap++ = a;
		a =+ 128;
		nt =- 128;
	}
	if(nt) {
		*dp++ = ((nt-1)<<8) | RO;
		*ap++ = a;
		a =+ nt;
	}
	a = USIZE;
	while(nd >= 128) {
		*dp++ = (127<<8) | RW;
		*ap++ = a;
		a =+ 128;
		nd =- 128;
	}
	if(nd) {
		*dp++ = ((nd-1)<<8) | RW;
		*ap++ = a;
		a =+ nd;
	}
	while(ap < &u.u_uisa[8]) {
		*dp++ = 0;
		*ap++ = 0;
	}
	a =+ ns;
	while(ns >= 128) {
		a =- 128;
		ns =- 128;
		*--dp = (127<<8) | RW;
		*--ap = a;
	}
	if(ns) {
		*--dp = ((128-ns)<<8) | RW | ED;
		*--ap = a-128;
	}
	sureg();
	return(0);
}

nseg(n)
{

	return((n+127)>>7);
}