/*
 * Copyright (c) 1982, 1986 Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)swapgeneric.c	7.5 (Berkeley) 05/07/91
 */

#include "sys/param.h"
#include "sys/conf.h"
#include "sys/buf.h"
#include "sys/systm.h"
#include "sys/reboot.h"

#include "../dev/device.h"

/*
 * Generic configuration;  all in one
 */
dev_t	rootdev = NODEV;
dev_t	argdev = NODEV;
dev_t	dumpdev = NODEV;
int	nswap;
struct	swdevt swdevt[] = {
	{ -1,	1,	0 },
	{ 0,	0,	0 },
};
int	dmmin, dmmax, dmtext;

extern	struct driver rddriver;
extern	struct driver sddriver;
extern struct hp_ctlr hp_cinit[];
extern struct hp_device hp_dinit[];

struct	genericconf {
	caddr_t	gc_driver;
	char	*gc_name;
	dev_t	gc_root;
} genericconf[] = {
	{ (caddr_t)&rddriver,	"rd",	makedev(2, 0),	},
	{ (caddr_t)&sddriver,	"sd",	makedev(4, 0),	},
	{ 0 },
};

setconf()
{
	register struct hp_ctlr *hc;
	register struct hp_device *hd;
	register struct genericconf *gc;
	register char *cp;
	int unit, swaponroot = 0;

	if (rootdev != NODEV)
		goto doswap;
	unit = 0;
	if (boothowto & RB_ASKNAME) {
		char name[128];
retry:
		printf("root device? ");
		gets(name);
		for (gc = genericconf; gc->gc_driver; gc++)
			if (gc->gc_name[0] == name[0] &&
			    gc->gc_name[1] == name[1])
				goto gotit;
		printf("use one of:");
		for (gc = genericconf; gc->gc_driver; gc++)
			printf(" %s%%d", gc->gc_name);
		printf("\n");
		goto retry;
gotit:
		if (*++cp < '0' || *cp > '9') {
			printf("bad/missing unit number\n");
			goto retry;
		}
		while (*cp >= '0' && *cp <= '9')
			unit = 10 * unit + *cp++ - '0';
		if (*cp == '*')
			swaponroot++;
		goto found;
	}
	for (gc = genericconf; gc->gc_driver; gc++) {
		for (hd = hp_dinit; hd->hp_driver; hd++) {
			if (hd->hp_alive == 0)
				continue;
			if (hd->hp_unit == 0 && hd->hp_driver ==
			    (struct driver *)gc->gc_driver) {
				printf("root on %s0\n", hd->hp_driver->d_name);
				goto found;
			}
		}
	}
	printf("no suitable root\n");
	asm("stop #0x2700");
found:
	gc->gc_root = makedev(major(gc->gc_root), unit*8);
	rootdev = gc->gc_root;
doswap:
	swdevt[0].sw_dev = argdev = dumpdev =
	    makedev(major(rootdev), minor(rootdev)+1);
	/* swap size and dumplo set during autoconfigure */
	if (swaponroot)
		rootdev = dumpdev;
}

gets(cp)
	char *cp;
{
	register char *lp;
	register c;

	lp = cp;
	for (;;) {
		cnputc(c = cngetc());
		switch (c) {
		case '\n':
		case '\r':
			*lp++ = '\0';
			return;
		case '\b':
		case '\177':
			if (lp > cp) {
				lp--;
				cnputc(' ');
				cnputc('\b');
			}
			continue;
		case '#':
			lp--;
			if (lp < cp)
				lp = cp;
			continue;
		case '@':
		case 'u'&037:
			lp = cp;
			cnputc('\n');
			continue;
		default:
			*lp++ = c;
		}
	}
}