1 files changed, 294 insertions, 0 deletions
diff --git a/sys/arch/amd64/stand/libsa/diskprobe.c b/sys/arch/amd64/stand/libsa/diskprobe.c
new file mode 100644
index 00000000000..117e1ebad98
--- /dev/null
+++ b/sys/arch/amd64/stand/libsa/diskprobe.c
@@ -0,0 +1,294 @@
+/*	$OpenBSD: diskprobe.c,v 1.1 2004/02/03 12:09:47 mickey Exp $	*/
+
+/*
+ * Copyright (c) 1997 Tobias Weingartner
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+/* We want the disk type names from disklabel.h */
+#undef DKTYPENAMES
+
+#include <sys/param.h>
+#include <sys/queue.h>
+#include <sys/reboot.h>
+#include <sys/disklabel.h>
+#include <stand/boot/bootarg.h>
+#include <machine/biosvar.h>
+#include <lib/libz/zlib.h>
+#include "disk.h"
+#include "biosdev.h"
+#include "libsa.h"
+
+#define MAX_CKSUMLEN MAXBSIZE / DEV_BSIZE	/* Max # of blks to cksum */
+
+/* Local Prototypes */
+static int disksum(int);
+
+/* List of disk devices we found/probed */
+struct disklist_lh disklist;
+
+/* Pointer to boot device */
+struct diskinfo *bootdev_dip;
+
+extern int debug;
+
+/* Probe for all BIOS floppies */
+static void
+floppyprobe(void)
+{
+	struct diskinfo *dip;
+	int i;
+
+	/* Floppies */
+	for(i = 0; i < 4; i++) {
+		dip = alloc(sizeof(struct diskinfo));
+		bzero(dip, sizeof(*dip));
+
+		if(bios_getdiskinfo(i, &dip->bios_info)) {
+#ifdef BIOS_DEBUG
+			if (debug)
+				printf(" <!fd%u>", i);
+#endif
+			free(dip, 0);
+			break;
+		}
+
+		printf(" fd%u", i);
+
+		/* Fill out best we can - (fd?) */
+		dip->bios_info.bsd_dev = MAKEBOOTDEV(2, 0, 0, i, RAW_PART);
+
+		/*
+		 * Delay reading the disklabel until we're sure we want
+		 * to boot from the floppy. Doing this avoids a delay
+		 * (sometimes very long) when trying to read the label
+		 * and the drive is unplugged.
+		 */
+		dip->bios_info.flags |= BDI_BADLABEL;
+
+		/* Add to queue of disks */
+		TAILQ_INSERT_TAIL(&disklist, dip, list);
+	}
+}
+
+
+/* Probe for all BIOS hard disks */
+static void
+hardprobe(void)
+{
+	struct diskinfo *dip;
+	int i;
+	u_int bsdunit, type;
+	u_int scsi = 0, ide = 0;
+	const char *dc = (const char *)((0x40 << 4) + 0x75);
+
+	/* Hard disks */
+	for (i = 0x80; i < (0x80 + *dc); i++) {
+		dip = alloc(sizeof(struct diskinfo));
+		bzero(dip, sizeof(*dip));
+
+		if(bios_getdiskinfo(i, &dip->bios_info)) {
+#ifdef BIOS_DEBUG
+			if (debug)
+				printf(" <!hd%u>", i&0x7f);
+#endif
+			free(dip, 0);
+			break;
+		}
+
+		printf(" hd%u%s", i&0x7f, (dip->bios_info.bios_edd > 0?"+":""));
+
+		/* Try to find the label, to figure out device type */
+		if((bios_getdisklabel(&dip->bios_info, &dip->disklabel)) ) {
+			printf("*");
+			bsdunit = ide++;
+			type = 0;	/* XXX let it be IDE */
+		} else {
+			/* Best guess */
+			switch (dip->disklabel.d_type) {
+			case DTYPE_SCSI:
+				type = 4;
+				bsdunit = scsi++;
+				dip->bios_info.flags |= BDI_GOODLABEL;
+				break;
+
+			case DTYPE_ESDI:
+			case DTYPE_ST506:
+				type = 0;
+				bsdunit = ide++;
+				dip->bios_info.flags |= BDI_GOODLABEL;
+				break;
+
+			default:
+				dip->bios_info.flags |= BDI_BADLABEL;
+				type = 0;	/* XXX Suggest IDE */
+				bsdunit = ide++;
+			}
+		}
+
+		dip->bios_info.checksum = 0; /* just in case */
+		/* Fill out best we can */
+		dip->bios_info.bsd_dev = MAKEBOOTDEV(type, 0, 0, bsdunit, RAW_PART);
+
+		/* Add to queue of disks */
+		TAILQ_INSERT_TAIL(&disklist, dip, list);
+	}
+}
+
+
+/* Probe for all BIOS supported disks */
+u_int32_t bios_cksumlen;
+void
+diskprobe(void)
+{
+	struct diskinfo *dip;
+	int i;
+
+	/* These get passed to kernel */
+	bios_diskinfo_t *bios_diskinfo;
+
+	/* Init stuff */
+	printf("disk:");
+	TAILQ_INIT(&disklist);
+
+	/* Do probes */
+	floppyprobe();
+#ifdef BIOS_DEBUG
+	if (debug)
+		printf(";");
+#endif
+	hardprobe();
+
+	/* Checksumming of hard disks */
+	for (i = 0; disksum(i++) && i < MAX_CKSUMLEN; )
+		;
+	bios_cksumlen = i;
+
+	/* Get space for passing bios_diskinfo stuff to kernel */
+	for(i = 0, dip = TAILQ_FIRST(&disklist); dip; dip = TAILQ_NEXT(dip, list))
+		i++;
+	bios_diskinfo = alloc(++i * sizeof(bios_diskinfo_t));
+
+	/* Copy out the bios_diskinfo stuff */
+	for(i = 0, dip = TAILQ_FIRST(&disklist); dip; dip = TAILQ_NEXT(dip, list))
+		bios_diskinfo[i++] = dip->bios_info;
+
+	bios_diskinfo[i++].bios_number = -1;
+	/* Register for kernel use */
+	addbootarg(BOOTARG_CKSUMLEN, sizeof(u_int32_t), &bios_cksumlen);
+	addbootarg(BOOTARG_DISKINFO, i * sizeof(bios_diskinfo_t), bios_diskinfo);
+
+	printf("\n");
+}
+
+
+/* Find info on given BIOS disk */
+struct diskinfo *
+dklookup(int dev)
+{
+	struct diskinfo *dip;
+
+	for(dip = TAILQ_FIRST(&disklist); dip; dip = TAILQ_NEXT(dip, list))
+		if(dip->bios_info.bios_number == dev)
+			return(dip);
+
+	return(NULL);
+}
+
+void
+dump_diskinfo(void)
+{
+	struct diskinfo *dip;
+
+	printf("Disk\tBIOS#\tType\tCyls\tHeads\tSecs\tFlags\tChecksum\n");
+	for(dip = TAILQ_FIRST(&disklist); dip; dip = TAILQ_NEXT(dip, list)){
+		bios_diskinfo_t *bdi = &dip->bios_info;
+		int d = bdi->bios_number;
+
+		printf("%cd%d\t0x%x\t%s\t%d\t%d\t%d\t0x%x\t0x%x\n",
+		    (d & 0x80)?'h':'f', d & 0x7F, d,
+			(bdi->flags & BDI_BADLABEL)?"*none*":"label",
+		    bdi->bios_cylinders, bdi->bios_heads, bdi->bios_sectors,
+		    bdi->flags, bdi->checksum);
+	}
+}
+
+/* Find BIOS portion on given BIOS disk
+ * XXX - Use dklookup() instead.
+ */
+bios_diskinfo_t *
+bios_dklookup(int dev)
+{
+	struct diskinfo *dip;
+
+	dip = dklookup(dev);
+	if(dip)
+		return(&dip->bios_info);
+
+	return(NULL);
+}
+
+/*
+ * Checksum one more block on all harddrives
+ *
+ * Use the adler32() function from libz,
+ * as it is quick, small, and available.
+ */
+int
+disksum(int blk)
+{
+	struct diskinfo *dip, *dip2;
+	int st, reprobe = 0;
+	char *buf;
+
+	buf = alloca(DEV_BSIZE);
+	for(dip = TAILQ_FIRST(&disklist); dip; dip = TAILQ_NEXT(dip, list)){
+		bios_diskinfo_t *bdi = &dip->bios_info;
+
+		/* Skip this disk if it is not a HD or has had an I/O error */
+		if (!(bdi->bios_number & 0x80) || bdi->flags & BDI_INVALID)
+			continue;
+
+		/* Adler32 checksum */
+		st = biosd_io(F_READ, bdi, blk, 1, buf);
+		if (st) {
+			bdi->flags |= BDI_INVALID;
+			continue;
+		}
+		bdi->checksum = adler32(bdi->checksum, buf, DEV_BSIZE);
+
+		for(dip2 = TAILQ_FIRST(&disklist); dip2 != dip;
+				dip2 = TAILQ_NEXT(dip2, list)){
+			bios_diskinfo_t *bd = &dip2->bios_info;
+			if ((bd->bios_number & 0x80) &&
+			    !(bd->flags & BDI_INVALID) &&
+			    bdi->checksum == bd->checksum)
+				reprobe = 1;
+		}
+	}
+
+	return (reprobe);
+}
+