Changes/updates to /boot stuff. More to come.

Fixes many divide by zero and pointer bugs.

16 files changed, 228 insertions, 92 deletions

diff --git a/sys/arch/i386/stand/Makefile b/sys/arch/i386/stand/Makefile
index e380e37f026..25032315e27 100644
--- a/sys/arch/i386/stand/Makefile
+++ b/sys/arch/i386/stand/Makefile
@@ -1,5 +1,11 @@
-#	$OpenBSD: Makefile,v 1.7 1997/07/28 22:03:25 mickey Exp $
+#	$OpenBSD: Makefile,v 1.8 1998/02/24 22:06:36 weingart Exp $
 
 SUBDIR=	etc libsa libz biosboot installboot boot mbr
 
+test-fd0:
+	sudo mount /dev/fd0a /mnt
+	sudo cp /usr/mdec/boot /mnt
+	sudo /usr/mdec/installboot -v /mnt/boot /usr/mdec/biosboot fd0
+	sudo umount /mnt
+
 .include <bsd.subdir.mk>
diff --git a/sys/arch/i386/stand/README b/sys/arch/i386/stand/README
index e596ac29873..170ef1fb354 100644
--- a/sys/arch/i386/stand/README
+++ b/sys/arch/i386/stand/README
@@ -1,4 +1,4 @@
-$OpenBSD: README,v 1.11 1997/10/17 15:03:16 weingart Exp $
+$OpenBSD: README,v 1.12 1998/02/24 22:06:37 weingart Exp $
 
 # hmm, no copyright
 
@@ -129,10 +129,6 @@ for that drive and other info. APM connect info is passed as well not in
 that apm0 structure, so apm0 will become a slave on bios0 soon.
 To get your /boot installed properly on a hardrive you have to load /bsd
 from that hd/partition (since only boot drive geometry is passed).
-The passed geometry will be used for all the drives, if you
-will try to installboot on other disks (floppies and pseudo-disks will
-honor the disklabel), that might be useful on some bioses,
-esp. SCSI HAs which use fixed translated geometry for all the drives.
 
 
 Mon Oct 13 16:41:18 CDT 1997
@@ -144,3 +140,12 @@ preliminary support for passing a memory map to the kernel, instead of
 cnvmem/extmem.  This should make weird boards easier to support in the
 future.
 
+
+Tue Jan  6 19:51:43 CST 1998
+----------------------------
+
+Query and pass PCI BIOS information to the kernel.  This should help in
+determening the correct configuration mode to use.  Pass in cnvmem/extmem
+as the user sets the amount of memory with the 'set memory' command, or
+the amount calculated by the memory find/probe routines.
+
diff --git a/sys/arch/i386/stand/biosboot/biosboot.S b/sys/arch/i386/stand/biosboot/biosboot.S
index fd4072302c6..a14c286b5a1 100644
--- a/sys/arch/i386/stand/biosboot/biosboot.S
+++ b/sys/arch/i386/stand/biosboot/biosboot.S
@@ -1,4 +1,4 @@
-/*	$OpenBSD: biosboot.S,v 1.21 1997/11/05 02:12:54 mickey Exp $	*/
+/*	$OpenBSD: biosboot.S,v 1.22 1998/02/24 22:06:39 weingart Exp $	*/
 
 /*
  * Copyright (c) 1997 Michael Shalayeff
@@ -94,7 +94,7 @@ ebpb:	.long	16		/* hidden sectors */
 	.word	0		/* physical disk */
 	.byte	0x29		/* signature, needed by NT */
 	.space	4, 0		/* volume serial number */
-	.asciz	"NO LABEL  "
+	.asciz	"UNIX LABEL"
 	.asciz	"UFS 4.4"
 
 	/* boot code */
@@ -179,7 +179,7 @@ ebpb:	.long	16		/* hidden sectors */
 
 	/* read error */
 	puts(2f)
-	jmp	5f
+	jmp	halt
 2:	.asciz	"\r\nRead error\r\n"
 
 3:	/* read next block */
@@ -207,7 +207,7 @@ ebpb:	.long	16		/* hidden sectors */
 	je	3f
 
 	puts(1f)
-5:
+halt:
 	cli
 	hlt
 1:	.ascii	"Bad magic"
diff --git a/sys/arch/i386/stand/boot/conf.c b/sys/arch/i386/stand/boot/conf.c
index ce3572c6e9b..7b6c4629986 100644
--- a/sys/arch/i386/stand/boot/conf.c
+++ b/sys/arch/i386/stand/boot/conf.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: conf.c,v 1.10 1997/10/26 23:22:09 mickey Exp $	*/
+/*	$OpenBSD: conf.c,v 1.11 1998/02/24 22:06:40 weingart Exp $	*/
 
 /*
  * Copyright (c) 1996 Michael Shalayeff
@@ -47,7 +47,7 @@
 #include <biosdev.h>
 #include <dev/cons.h>
 
-const char version[] = "1.06";
+const char version[] = "1.20";
 int	debug;
 
 struct fs_ops file_system[] = {
diff --git a/sys/arch/i386/stand/libsa/Makefile b/sys/arch/i386/stand/libsa/Makefile
index a3ee13f8b14..67be2420a55 100644
--- a/sys/arch/i386/stand/libsa/Makefile
+++ b/sys/arch/i386/stand/libsa/Makefile
@@ -1,4 +1,4 @@
-#	$OpenBSD: Makefile,v 1.29 1997/10/22 23:34:35 mickey Exp $
+#	$OpenBSD: Makefile,v 1.30 1998/02/24 22:06:42 weingart Exp $
 
 
 LIB=	sa
@@ -16,11 +16,13 @@ DIR_KERN=$S/lib/libkern
 SRCS=	gidt.S debug_i386.S alloca.S \
 	machdep.c dev_i386.c exec_i386.c cmd_i386.c \
 	biosdev.c bioscons.c gateA20.c apmprobe.c \
-	memprobe.c diskprobe.c time.c
+	memprobe.c diskprobe.c pciprobe.c smpprobe.c \
+	time.c
 
 # stand routines
 SRCS+=	alloc.c exit.c exec.c getfile.c gets.c globals.c strcmp.c strlen.c \
-	strncmp.c memcmp.c memcpy.c memset.c printf.c strerror.c strncpy.c
+	strncmp.c memcmp.c memcpy.c memset.c printf.c strerror.c strncpy.c \
+	strtol.c
 
 # math for cd9660
 #SRCS+=	divdi3.c qdivrem.c
diff --git a/sys/arch/i386/stand/libsa/alloca.S b/sys/arch/i386/stand/libsa/alloca.S
index 6e14bbd3bc6..d6b2cc40f84 100644
--- a/sys/arch/i386/stand/libsa/alloca.S
+++ b/sys/arch/i386/stand/libsa/alloca.S
@@ -38,10 +38,10 @@
 
 #if defined(LIBC_SCCS)
 	.text
-	.asciz "$OpenBSD: alloca.S,v 1.1 1997/04/30 18:10:06 mickey Exp $"
+	.asciz "$OpenBSD: alloca.S,v 1.2 1998/02/24 22:06:43 weingart Exp $"
 #endif
 
-/* like alloc, but automatic automatic free in return */
+/* like alloc, but automatic free in return */
 
 ENTRY(alloca)
 	popl	%edx		/*  pop return addr */
diff --git a/sys/arch/i386/stand/libsa/apmprobe.c b/sys/arch/i386/stand/libsa/apmprobe.c
index bb6b37b61d8..aee1192594c 100644
--- a/sys/arch/i386/stand/libsa/apmprobe.c
+++ b/sys/arch/i386/stand/libsa/apmprobe.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: apmprobe.c,v 1.3 1997/11/30 21:51:36 mickey Exp $	*/
+/*	$OpenBSD: apmprobe.c,v 1.4 1998/02/24 22:06:44 weingart Exp $	*/
 
 /*
  * Copyright (c) 1997 Michael Shalayeff
@@ -144,7 +144,6 @@ apmprobe()
 #else
 		printf(" apm");
 #endif
-		putchar('\n');
 		addbootarg(BOOTARG_APMINFO, sizeof(ai), &ai);
 	}
 }
diff --git a/sys/arch/i386/stand/libsa/biosdev.c b/sys/arch/i386/stand/libsa/biosdev.c
index 014da740ef1..cb5e4a6599b 100644
--- a/sys/arch/i386/stand/libsa/biosdev.c
+++ b/sys/arch/i386/stand/libsa/biosdev.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: biosdev.c,v 1.49 1997/11/30 21:51:38 mickey Exp $	*/
+/*	$OpenBSD: biosdev.c,v 1.50 1998/02/24 22:06:46 weingart Exp $	*/
 
 /*
  * Copyright (c) 1996 Michael Shalayeff
@@ -89,9 +89,8 @@ bios_getdiskinfo(dev, pdi)
 {
 	u_int rv;
 
-	rv = biosdreset(dev);
-	if(rv)
-		return(1);
+	/* Just reset, don't check return code */
+	biosdreset(dev);
 
 #ifdef BIOS_DEBUG
 	printf("getinfo: try #8, %x,%p\n", dev, pdi);
@@ -105,16 +104,19 @@ bios_getdiskinfo(dev, pdi)
 			    "=b" (pdi->bios_sectors)
 			  : "0" (0x0800), "1" (dev) : "cc");
 
+#ifdef BIOS_DEBUG
+	printf("getinfo: got #8\n");
+	printf("disk 0x%x: %d,%d,%d\n", dev, pdi->bios_cylinders,
+		pdi->bios_heads, pdi->bios_sectors);
+#endif
+	if (rv & 0xff)
+		return(1);
+
 	/* Fix up info */
 	pdi->bios_number = dev;
 	pdi->bios_heads++;
 	pdi->bios_cylinders &= 0x3ff;
 	pdi->bios_cylinders++;
-#ifdef BIOS_DEBUG
-	printf("getinfo: got #8\n");
-#endif
-	if (rv & 0xff || !pdi->bios_cylinders)
-		return(1);
 
 #if 0
 	/* NOTE:
@@ -144,7 +146,7 @@ bios_getdiskinfo(dev, pdi)
 	/*
 	 * NOTE: This seems to hang on certain machines.  Use function #8
 	 * first, and verify with #21 IFF #8 succeeds first.
-	 * don't try this for a:
+	 * Do not try this for floppy 0 (to support CD-ROM boot).
 	 */
 	if (dev) {
 		__asm __volatile (DOINT(0x13) "; setc %b0"
@@ -155,6 +157,14 @@ bios_getdiskinfo(dev, pdi)
 			return(1);
 	}
 
+	/* XXX - Sanity check */
+	if (!pdi->bios_cylinders || !pdi->bios_heads || !pdi->bios_sectors)
+		return(1);
+
+	/* CD-ROMs sometimes return heads == 1 */
+	if (pdi->bios_heads < 2)
+		return(1);
+
 	return(0);
 }
 
@@ -288,6 +298,10 @@ bios_getdisklabel(bd, label)
 	int cyl, head, sect;
 	int error, i;
 
+	/* XXX - Sanity check */
+	if(bd->bios_heads == 0 || bd->bios_sectors == 0)
+		return("failed to read disklabel");
+
 	/* Read MBR */
 	btochs(DOSBBSECTOR, cyl, head, sect, bd->bios_heads, bd->bios_sectors);
 
diff --git a/sys/arch/i386/stand/libsa/cmd_i386.c b/sys/arch/i386/stand/libsa/cmd_i386.c
index 50a5cb36e49..c294da1be5f 100644
--- a/sys/arch/i386/stand/libsa/cmd_i386.c
+++ b/sys/arch/i386/stand/libsa/cmd_i386.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: cmd_i386.c,v 1.19 1997/11/30 21:51:41 mickey Exp $	*/
+/*	$OpenBSD: cmd_i386.c,v 1.20 1998/02/24 22:06:47 weingart Exp $	*/
 
 /*
  * Copyright (c) 1997 Michael Shalayeff, Tobias Weingartner
@@ -42,22 +42,54 @@
 #include "libsa.h"
 #include <cmd.h>
 
-static int Xdiskinfo __P((void));
-static int Xregs __P((void));
+
+extern const char version[];
+
 static int Xboot __P((void));
+static int Xdiskinfo __P((void));
 static int Xmemory __P((void));
+static int Xregs __P((void));
+static int Xcnvmem __P((void));
+static int Xextmem __P((void));
 
 /* From gidt.S */
-int bootbuf __P((int, int));
+int bootbuf __P((void*, int));
 
 const struct cmd_table cmd_machine[] = {
-	{ "diskinfo", CMDT_CMD, Xdiskinfo },
-	{ "regs",     CMDT_CMD, Xregs },
 	{ "boot",     CMDT_CMD, Xboot },
+	{ "diskinfo", CMDT_CMD, Xdiskinfo },
 	{ "memory",   CMDT_CMD, Xmemory },
+	{ "regs",     CMDT_CMD, Xregs },
+	{"cnvmem",    CMDT_CMD, Xcnvmem},
+	{"extmem",    CMDT_CMD, Xextmem},
 	{ NULL, 0 }
 };
 
+
+/* Set size of conventional ram */
+static int
+Xcnvmem()
+{
+	if (cmd.argc != 2)
+		printf("cnvmem %d\n", cnvmem);
+	else
+		cnvmem = strtol(cmd.argv[1], NULL, 0);
+
+	return 0;
+}
+
+/* Set size of extended ram */
+static int
+Xextmem()
+{
+	if (cmd.argc != 2)
+		printf("extmem %d\n", extmem);
+	else
+		extmem = strtol(cmd.argv[1], NULL, 0);
+
+	return 0;
+}
+
 static int
 Xdiskinfo()
 {
@@ -77,10 +109,12 @@ static int
 Xboot()
 {
 	int dev, part, st;
-	char *buf = (void *)0x7c00;
+	char buf[DEV_BSIZE], *dest = (void*)0x7c00;
 
 	if(cmd.argc != 2) {
-		printf("machine boot {fd,hd}[0123][abcd]\n");
+		printf("machine boot {fd,hd}<0123>[abcd]\n");
+		printf("Where [0123] is the disk number,"
+			" and [abcd] is the partition.\n");
 		return 0;
 	}
 
@@ -91,7 +125,7 @@ Xboot()
 		goto bad;
 	if(cmd.argv[1][2] < '0' || cmd.argv[1][2] > '3')
 		goto bad;
-	if(cmd.argv[1][3] < 'a' || cmd.argv[1][3] > 'd')
+	if((cmd.argv[1][3] < 'a' || cmd.argv[1][3] > 'd') && cmd.argv[1][3] != '\0')
 		goto bad;
 
 	printf("Booting from %s ", cmd.argv[1]);
@@ -100,27 +134,29 @@ Xboot()
 	dev += (cmd.argv[1][2] - '0');
 	part = (cmd.argv[1][3] - 'a');
 
-	printf("[%x,%d]\n", dev, part);
+	if (part > 0)
+		printf("[%x,%d]\n", dev, part);
+	else
+		printf("[%x]\n", dev);
 
 	/* Read boot sector from device */
-	st = biosd_io(F_READ, dev, 0, 0, 1, 1, buf);
+	st = biosd_io(F_READ, dev, 0, 0, 0, 1, buf);
 	if(st) goto bad;
 
 	/* Frob boot flag in buffer from HD */
-	if(dev & 0x80){
+	if((dev & 0x80) && (part > 0)){
 		int i, j;
 
 		for(i = 0, j = DOSPARTOFF; i < 4; i++, j += 16)
 			if(part == i)
-				buf[j] = 0x80;
+				buf[j] |= 0x80;
 			else
-				buf[j] = 0x00;
+				buf[j] &= ~0x80;
 	}
 
-	printf("%x %x %x %x %x\n", buf[0], buf[1], buf[2], buf[3], buf[4]);
-
 	/* Load %dl, ljmp */
-	bootbuf(dev, part);
+	bcopy(buf, dest, DEV_BSIZE);
+	bootbuf(dest, dev);
 
 bad:
 	printf("Invalid device!\n");
diff --git a/sys/arch/i386/stand/libsa/debug_i386.S b/sys/arch/i386/stand/libsa/debug_i386.S
index eb3966aa194..35da12bed59 100644
--- a/sys/arch/i386/stand/libsa/debug_i386.S
+++ b/sys/arch/i386/stand/libsa/debug_i386.S
@@ -1,4 +1,4 @@
-/*	$OpenBSD: debug_i386.S,v 1.7 1997/09/18 18:38:00 mickey Exp $	*/
+/*	$OpenBSD: debug_i386.S,v 1.8 1998/02/24 22:06:48 weingart Exp $	*/
 
 /*
  * Copyright (c) 1997 Michael Shalayeff
@@ -52,11 +52,11 @@ alltraps:
 #ifdef DEBUG
 	movl	$0xb8280, %edi
 	movl	0x0c*4(%esp), %eax	# trapno
-	addb	$'@', %al
+	addb	$'0', %al
 	movb	$0x17, %ah
 	shll	$16, %eax
 	movb	0x0d*4(%esp), %al	# error
-	addl	$' ', %al
+	addl	$'0', %al
 	movb	$0x17, %ah
 	movl	%ax, (%edi)
 	hlt
@@ -73,6 +73,7 @@ alltraps:
 	popl	%ds
 	popal
 	addl	$0x8, %esp
+	hlt
 	iret
 
 ENTRY(check_regs)
@@ -98,8 +99,8 @@ ENTRY(check_regs)
 	movl		%ss,  %eax; stosl # %ss
 	movl	0x04*4(%esp), %eax; stosl # %ds
 	movl	0x03*4(%esp), %eax; stosl # %es
-	movl	0x02*4(%esp), %eax; stosl # %ds
-	movl	0x01*4(%esp), %eax; stosl # %es
+	movl	0x02*4(%esp), %eax; stosl # %fs
+	movl	0x01*4(%esp), %eax; stosl # %gs
 
 #ifdef DEBUG
 	movl	$0xb8288, %edi
diff --git a/sys/arch/i386/stand/libsa/diskprobe.c b/sys/arch/i386/stand/libsa/diskprobe.c
index 3342ff37b10..38ef5db6c4c 100644
--- a/sys/arch/i386/stand/libsa/diskprobe.c
+++ b/sys/arch/i386/stand/libsa/diskprobe.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: diskprobe.c,v 1.13 1997/12/22 04:39:22 mickey Exp $	*/
+/*	$OpenBSD: diskprobe.c,v 1.14 1998/02/24 22:06:50 weingart Exp $	*/
 
 /*
  * Copyright (c) 1997 Tobias Weingartner
@@ -176,7 +176,6 @@ diskprobe()
 #endif
 	hardprobe();
 
-
 	/* Checksumming of hard disks */
 	for (i = 0; disksum(i++) && i < MAX_CKSUMLEN; )
 		;
diff --git a/sys/arch/i386/stand/libsa/gateA20.c b/sys/arch/i386/stand/libsa/gateA20.c
index 8e81e1e834b..76837a4b6db 100644
--- a/sys/arch/i386/stand/libsa/gateA20.c
+++ b/sys/arch/i386/stand/libsa/gateA20.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: gateA20.c,v 1.4 1997/07/17 23:00:26 mickey Exp $	*/
+/*	$OpenBSD: gateA20.c,v 1.5 1998/02/24 22:06:51 weingart Exp $	*/
 
 /*
  * Ported to boot 386BSD by Julian Elischer (julian@tfs.com) Sept 1992
@@ -28,17 +28,33 @@
  * the rights to redistribute these changes.
  */
 
+#include <sys/param.h>
 #include <sys/types.h>
 #include <machine/pio.h>
-#include <lib/libsa/stand.h>
 #include <dev/ic/i8042reg.h>
 
+#include "libsa.h"
+
 #define KC_CMD_WOUT	0xd1		/* write output port */
 #define KB_A20		0xdf		/* enable A20,
 					   enable output buffer full interrupt
 					   enable data line
 					   enable clock line */
 
+
+#define A20_KBD		0
+#define A20_0x92	1
+
+/*
+ * Check for an oddball IBM_L40 machine.
+ */
+int
+getA20type()
+{
+	return(A20_KBD);
+}
+
+
 /*
  * Gate A20 for high memory
  */
@@ -46,24 +62,37 @@ void
 gateA20(on)
 	int on;
 {
-#ifdef	IBM_L40
-	outb(0x92, 0x2);
-#else	IBM_L40
-	while (inb(KBSTATP) & KBS_IBF);
-
-	while (inb(KBSTATP) & KBS_DIB)
-		(void)inb(KBDATAP);
-
-	outb(KBCMDP, KC_CMD_WOUT);
-	while (inb(KBSTATP) & KBS_IBF);
-
-	if (on)
-		outb(KBDATAP, KB_A20);
-	else
-		outb(KBDATAP, 0xcd);
-	while (inb(KBSTATP) & KBS_IBF);
-
-	while (inb(KBSTATP) & KBS_DIB)
-		(void)inb(KBDATAP);
-#endif	IBM_L40
+
+	if (getA20type() == A20_0x92) {
+		int data;
+
+		/* Try to use 0x92 to turn on A20 */
+		if (on) {
+			data = inb(0x92);
+			outb(0x92, data | 0x2);
+		} else {
+			data = inb(0x92);
+			outb(0x92, data & ~0x2);
+		}
+	} else {
+
+		/* XXX - These whiles might need to be changed to bounded for loops */
+		while (inb(KBSTATP) & KBS_IBF);
+
+		while (inb(KBSTATP) & KBS_DIB)
+			(void)inb(KBDATAP);
+
+		outb(KBCMDP, KC_CMD_WOUT);
+		while (inb(KBSTATP) & KBS_IBF);
+
+		if (on)
+			outb(KBDATAP, KB_A20);
+		else
+			outb(KBDATAP, 0xcd);
+		while (inb(KBSTATP) & KBS_IBF);
+
+		while (inb(KBSTATP) & KBS_DIB)
+			(void)inb(KBDATAP);
+	}
 }
+
diff --git a/sys/arch/i386/stand/libsa/gidt.S b/sys/arch/i386/stand/libsa/gidt.S
index 35e03b91085..76b3f62b518 100644
--- a/sys/arch/i386/stand/libsa/gidt.S
+++ b/sys/arch/i386/stand/libsa/gidt.S
@@ -1,4 +1,4 @@
-/*	$OpenBSD: gidt.S,v 1.18 1997/10/24 22:22:26 mickey Exp $	*/
+/*	$OpenBSD: gidt.S,v 1.19 1998/02/24 22:06:52 weingart Exp $	*/
 
 /*
  * Copyright (c) 1997 Michael Shalayeff
@@ -216,7 +216,7 @@ idt:
 	idte(xx); idte(xx); idte(xx);  idte(xx); idte(xx); idte(xx)
 	idte(xx); idte(xx); idte(xx);  idte(xx); idte(xx); idte(xx)
 	idte(xx) 
-		/*	Maskable interrupts (32-255) */
+		/* Maskable interrupts (32-255) */
 		/* BIOS entry points (32-63) */
 		/* DOS entry points (64-80) */
 #define idtb(b)	idte(emu/**/b)
@@ -338,6 +338,7 @@ IEMUENT(44); IEMUENT(45); IEMUENT(46); IEMUENT(47)
  * Return:	%eax, %edx, %ecx, %eflags (as returned from BIOS)
  *
  */
+.globl EMUh
 EMUh:
 	/* save %eax */
 	movl	%eax, 3f
@@ -419,10 +420,19 @@ intno	= . - 1
 /* Call buffer at 07c0:0000 in real mode to simulate a BIOS boot */
 ENTRY(bootbuf)
 	popl	%eax		/* Don't need return address */
+	popl	%esi		/* Buffer */
 	popl	%edx		/* Device */
-	popl	%eax		/* Partition - Not used, overwritten */
-	prot2real		/* Switch */
+	prot2real			/* Switch */
+
+	/* Set up stack */
+	cli
+	xorl	%eax, %eax
+	pushl	%ax
+	popl	%ss
+	movl	$0xfffc, %esp
+	sti
+
+	/* Jump to buffer */
 	addr32
-	data32
-	ljmp $0x7c0, $0x000
+	ljmp $0x0, $0x7c00
 
diff --git a/sys/arch/i386/stand/libsa/libsa.h b/sys/arch/i386/stand/libsa/libsa.h
index 54b8b8aee1a..d9148e98684 100644
--- a/sys/arch/i386/stand/libsa/libsa.h
+++ b/sys/arch/i386/stand/libsa/libsa.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: libsa.h,v 1.23 1997/11/30 21:51:44 mickey Exp $	*/
+/*	$OpenBSD: libsa.h,v 1.24 1998/02/24 22:06:54 weingart Exp $	*/
 
 /*
  * Copyright (c) 1996 Michael Shalayeff
@@ -41,6 +41,7 @@ void smpprobe __P((void));
 void memprobe __P((void));
 void diskprobe __P((void));
 void apmprobe __P((void));
+void pciprobe __P((void));
 
 void devboot __P((dev_t, char *));
 void *alloca __P((size_t));
diff --git a/sys/arch/i386/stand/libsa/machdep.c b/sys/arch/i386/stand/libsa/machdep.c
index 366c04e6574..5e4aec98b31 100644
--- a/sys/arch/i386/stand/libsa/machdep.c
+++ b/sys/arch/i386/stand/libsa/machdep.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: machdep.c,v 1.22 1997/11/30 21:51:46 mickey Exp $	*/
+/*	$OpenBSD: machdep.c,v 1.23 1998/02/24 22:06:55 weingart Exp $	*/
 
 /*
  * Copyright (c) 1997 Michael Shalayeff
@@ -55,11 +55,13 @@ machdep()
 	cninit();     CKPT('3');
 #ifndef _TEST
 	memprobe();   CKPT('4');
-	diskprobe();  CKPT('6');
+	diskprobe();  CKPT('5');
 
 	printf("bios:");
-	apmprobe();   CKPT('7');
-	printf("\n");
+	apmprobe();   CKPT('6');
+	pciprobe();   CKPT('7');
+	smpprobe();   CKPT('8');
+	printf("\n\n");
 #endif
-	CKPT('9');
+	CKPT('Z');
 }
diff --git a/sys/arch/i386/stand/libsa/memprobe.c b/sys/arch/i386/stand/libsa/memprobe.c
index 984b19f1efb..1deadbe9616 100644
--- a/sys/arch/i386/stand/libsa/memprobe.c
+++ b/sys/arch/i386/stand/libsa/memprobe.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: memprobe.c,v 1.25 1997/11/30 21:51:47 mickey Exp $	*/
+/*	$OpenBSD: memprobe.c,v 1.26 1998/02/24 22:06:56 weingart Exp $	*/
 
 /*
  * Copyright (c) 1997 Tobias Weingartner, Michael Shalayeff
@@ -37,10 +37,33 @@
 #include <stand/boot/bootarg.h>
 #include "libsa.h"
 
-static int addrprobe __P((u_int));
 u_int cnvmem, extmem;		/* XXX - compatibility */
 bios_memmap_t *memory_map;
 
+
+/* Check gateA20
+ *
+ * A sanity check.
+ */
+static __inline int
+checkA20(void)
+{
+	char *p = (char *)0x100000;
+	char *q = (char *)0x000000;
+	int st;
+
+	/* Simple check */
+	if(*p != *q)
+		return(1);
+
+	/* Complex check */
+	*p = ~(*p);
+	st = (*p != *q);
+	*p = ~(*p);
+
+	return(st);
+}
+
 /* BIOS int 15, AX=E820
  *
  * This is the "prefered" method.
@@ -283,14 +306,23 @@ memprobe()
 	/* XXX - Compatibility, remove later */
 	extmem = cnvmem = 0;
 	for(im = bm; im->type != BIOS_MAP_END; im++) {
-		if (im->type == BIOS_MAP_FREE) {
+		/* Count only "good" memory chunks 4K an up in size */
+		if ((im->type == BIOS_MAP_FREE) && (im->size >= 4)) {
 			printf(" %luK", (u_long)im->size);
 
-			if(im->addr < 0x100000)
+			/* We ignore "good" memory in the 640K-1M hole */
+			if(im->addr < 0xA0000)
 				cnvmem += im->size;
-			else
+			if(im->addr >= 0x100000)
 				extmem += im->size;
 		}
 	}
+
+	/* Check if gate A20 is on */
+	if(checkA20())
+		printf(" [A20 on]");
+	else
+		printf(" [A20 off!]");
+
 	printf("\n");
 }