Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

===================================================================
RCS file: /ftp/cvs/cvsroot/src/sys/arch/prep/stand/boot/io.c,v
rcsdiff: /ftp/cvs/cvsroot/src/sys/arch/prep/stand/boot/io.c,v: warning: Unknown phrases like `commitid ...;' are present.
retrieving revision 1.1
retrieving revision 1.1.64.2
diff -u -p -r1.1 -r1.1.64.2
--- src/sys/arch/prep/stand/boot/io.c	2000/02/29 15:21:49	1.1
+++ src/sys/arch/prep/stand/boot/io.c	2006/05/24 10:57:10	1.1.64.2
@@ -1,4 +1,4 @@
-/*	$NetBSD: io.c,v 1.1 2000/02/29 15:21:49 nonaka Exp $	*/
+/*	$NetBSD: io.c,v 1.1.64.2 2006/05/24 10:57:10 yamt Exp $	*/
 
 /*-
  * Copyright (C) 1995-1997 Gary Thomas (gdt@linuxppc.org)
@@ -33,32 +33,115 @@
  */
 
 #include <lib/libsa/stand.h>
+#include <sys/bswap.h>
 #include "boot.h"
 
+#define PCI_NSLOTS	8
+#define PCI_NREGS	5
+#define PCI_DEVID	0
+#define PCI_CMD		1
+#define PCI_CLASS	2
+#define PCI_MEMBASE	4
+
+
 volatile u_char *ISA_io  = (u_char *)0x80000000;
-volatile u_char *ISA_mem = (u_char *)0xC0000000;
+volatile u_char *ISA_mem = (u_char *)0xc0000000;
+volatile char *videomem = (char *)0xc00b8000; /* + vram offset */
+
+struct PCI_cinfo {
+	u_long *config_addr;
+	u_long regs[PCI_NREGS];
+} PCI_slots[PCI_NSLOTS] = {
+	{ (u_long *)0x80808000, {0xDEADBEEF,} },
+	{ (u_long *)0x80800800, {0xDEADBEEF,} },
+	{ (u_long *)0x80801000, {0xDEADBEEF,} },
+	{ (u_long *)0x80802000, {0xDEADBEEF,} },
+	{ (u_long *)0x80804000, {0xDEADBEEF,} },
+	{ (u_long *)0x80810000, {0xDEADBEEF,} },
+	{ (u_long *)0x80820000, {0xDEADBEEF,} },
+	{ (u_long *)0x80840000, {0xDEADBEEF,} },
+};
 
 void
-outb(port, val)
-	int port;
-	char val;
+outb(int port, char val)
 {
 
 	ISA_io[port] = val;
 }
 
+inline void
+outw(int port, u_int16_t val)
+{
+        outb(port, val>>8);
+        outb(port+1, val);
+}
+
 u_char
-inb(port)
-	int port;
+inb(int port)
 {
 
 	return (ISA_io[port]);
 }
 
 u_long
-local_to_PCI(addr)
-	u_long addr;
+local_to_PCI(u_long addr)
 {
 
 	return ((addr & 0x7FFFFFFF) | 0x80000000);
 }
+
+void
+unlockVideo(int slot)
+{
+	volatile u_int8_t *ppci;
+
+	ppci = (u_int8_t *)PCI_slots[slot].config_addr;
+	ppci[4] = 0x0003;	/* enable memory and IO Access */
+	ppci[0x10] = 0x00000;	/* Turn off memory mapping */
+	ppci[0x11] = 0x00000;	/* mem base = 0 */
+	ppci[0x12] = 0x00000;
+	ppci[0x13] = 0x00000;
+	__asm__ volatile("eieio");
+
+	outb(0x3d4, 0x11);
+	outb(0x3d5, 0x0e);   /* unlock CR0-CR7 */
+}
+
+int
+scan_PCI(int start)
+{
+	int slot, r;
+	struct PCI_cinfo *pslot;
+	int VGAslot = -1;
+	int highVGAslot = 0;
+
+	for (slot = start + 1; slot < PCI_NSLOTS; slot++) {
+		pslot = &PCI_slots[slot];
+		for (r = 0; r < PCI_NREGS; r++)
+			pslot->regs[r] = bswap32(pslot->config_addr[r]);
+		if (pslot->regs[PCI_DEVID] != 0xffffffff) {
+			/* we have a card */
+			if (((pslot->regs[PCI_CLASS] & 0xffffff00) == 
+				0x03000000) ||
+			    ((pslot->regs[PCI_CLASS] & 0xffffff00) ==
+				0x00010000)) {
+				/* it's a VGA card */
+				highVGAslot = slot;
+				if ((pslot->regs[PCI_CMD] & 0x03)) {
+					/* fW enabled it */
+					VGAslot = slot;
+					break;
+				}
+			}
+		}
+	}
+	return VGAslot;
+}
+
+int
+PCI_vendor(int slotnum)
+{
+	struct PCI_cinfo *pslot = &PCI_slots[slotnum];
+
+	return (pslot->regs[PCI_DEVID] & 0xffff);
+}