From f07fe57a662cc941b2c7331cd42ba9f52e0e967d Mon Sep 17 00:00:00 2001
From: pefo <pefo@openbsd.org>
Date: Mon, 17 Mar 1997 08:11:11 +0000
Subject: [PATCH] Serial console trouble again...

---
 sys/arch/arc/arc/machdep.c | 53 ++++++++++++++++++++++++++++++++------
 sys/dev/ic/com.c           | 11 +++++---
 2 files changed, 52 insertions(+), 12 deletions(-)

diff --git a/sys/arch/arc/arc/machdep.c b/sys/arch/arc/arc/machdep.c
index 98ea7203f16..4615d24396f 100644
--- a/sys/arch/arc/arc/machdep.c
+++ b/sys/arch/arc/arc/machdep.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: machdep.c,v 1.21 1997/03/12 19:16:43 pefo Exp $	*/
+/*	$OpenBSD: machdep.c,v 1.22 1997/03/17 08:11:12 pefo Exp $	*/
 /*
  * Copyright (c) 1988 University of Utah.
  * Copyright (c) 1992, 1993
@@ -38,7 +38,7 @@
  * SUCH DAMAGE.
  *
  *	from: @(#)machdep.c	8.3 (Berkeley) 1/12/94
- *      $Id: machdep.c,v 1.21 1997/03/12 19:16:43 pefo Exp $
+ *      $Id: machdep.c,v 1.22 1997/03/17 08:11:12 pefo Exp $
  */
 
 /* from: Utah Hdr: machdep.c 1.63 91/04/24 */
@@ -96,11 +96,13 @@
 #include <arc/dti/desktech.h>
 #include <arc/algor/algor.h>
 
+#if 0
 #include <asc.h>
 
 #if NASC > 0
 #include <arc/dev/ascreg.h>
 #endif
+#endif
 
 extern struct consdev *cn_tab;
 extern char kernel_start[];
@@ -147,6 +149,7 @@ int	(*Mach_splstatclock)() = splhigh;
 
 static void tlb_init_pica();
 static void tlb_init_tyne();
+static int get_simm_size(int *fadr, int max);
 
 
 /*
@@ -225,14 +228,14 @@ mips_init(argc, argv, code)
 		strcpy(cpu_model, "Deskstation rPC44");
 		arc_bus.isa_io_base = 0xb0000000;		/*XXX*/
 		arc_bus.isa_mem_base = 0xa0000000;		/*XXX*/
-		CONADDR = 0xa0000000+0x3f8;	/* Standard PC Com0 address */
+		CONADDR = 0; /* Don't screew the mouse... */
 		break;
 
 	case DESKSTATION_TYNE:
 		strcpy(cpu_model, "Deskstation Tyne");
 		arc_bus.isa_io_base = TYNE_V_ISA_IO;
 		arc_bus.isa_mem_base = TYNE_V_ISA_MEM;
-		CONADDR = TYNE_V_ISA_MEM+0x3f8;	/* Standard PC Com0 address */
+		CONADDR = 0; /* Don't screew the mouse... */
 		break;
 
 	case -1:	/* Not identified as an ARC system. We have a couple */
@@ -253,8 +256,9 @@ mips_init(argc, argv, code)
 		mem_layout[0].mem_start = 0;
 		mem_layout[0].mem_size = mips_trunc_page(CACHED_TO_PHYS(kernel_start));
 		mem_layout[1].mem_start = CACHED_TO_PHYS((int)sysend);
-		mem_layout[1].mem_size = 0x800000 - (int)(CACHED_TO_PHYS(sysend));
-		physmem = 8192 * 1024;
+		i = get_simm_size((int *)0, 128*1024*1024);
+		mem_layout[1].mem_size = i - (int)(CACHED_TO_PHYS(sysend));
+		physmem = i;
 #if 0
 		mem_layout[2].mem_start = 0x800000;
 		mem_layout[2].mem_size = 0x1000000;
@@ -494,8 +498,6 @@ mips_init(argc, argv, code)
 	 * Clear allocated memory.
 	 */
 	bzero(start, sysend - start);
-consinit();
-mdbpanic();
 
 	/*
 	 * Initialize the virtual memory system.
@@ -570,6 +572,41 @@ tlb_init_tyne()
 
 }
 
+/*
+ * Simple routine to figure out SIMM module size.
+ */
+static int
+get_simm_size(fadr, max)
+	int *fadr;
+	int max;
+{
+	int msave;
+	int msize;
+
+	fadr = (int *)PHYS_TO_UNCACHED(CACHED_TO_PHYS((int)fadr));
+
+	msize = 1024*1024;
+
+	while(max >= msize) {
+		msave = fadr[0];
+		fadr[0] = 0xC0DEB00F;
+		if(fadr[msize/4] == 0xC0DEB00F) {
+			fadr[0] = msave;
+			if(fadr[msize/4] == msave) {
+				break;	/* Wrap around */
+			}
+		}
+		fadr[0] = msave;
+		msize += msize;
+	}
+	if(msize <= max) {
+		return(msize);
+	}
+	else {
+		return(-1);
+	}
+}
+
 /*
  * Console initialization: called early on from main,
  * before vm init or startup.  Do enough configuration
diff --git a/sys/dev/ic/com.c b/sys/dev/ic/com.c
index 9aaf899d440..ee2251969b0 100644
--- a/sys/dev/ic/com.c
+++ b/sys/dev/ic/com.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: com.c,v 1.32 1997/03/12 20:17:37 pefo Exp $	*/
+/*	$OpenBSD: com.c,v 1.33 1997/03/17 08:11:11 pefo Exp $	*/
 /*	$NetBSD: com.c,v 1.82.4.1 1996/06/02 09:08:00 mrg Exp $	*/
 
 /*-
@@ -1433,9 +1433,7 @@ ohfudge:
  */
 #include <dev/cons.h>
 
-#if NCOM_PICA
-#include <arc/arc/arctype.h>
-	extern int cputype;
+#if NCOM_LOCALBUS
 #undef CONADDR
 	extern int CONADDR;
 #endif
@@ -1453,6 +1451,11 @@ comcnprobe(cp)
 	bus_space_handle_t ioh;
 	int found;
 
+	if(CONADDR == 0) {
+		cp->cn_pri = CN_DEAD;
+		return;
+	}
+
 	comconsiot = iot;
 	if (bus_space_map(iot, CONADDR, COM_NPORTS, 0, &ioh)) {
 		cp->cn_pri = CN_DEAD;
-- 
2.20.1