Thanks Bill, 
Here is some trial stuff:

machdep.c ----- sys/arch/macppc/macppc/machdep.c
syncicache.c -- sys/lib/libkern/arch/powerpc/syncicache.c    

Parts to check:
                                             machdepc. syncicache.c
(1) consinit removed                         x        
(2) cpu_probe_cache/before install_extint    x

(3) syncicache.c (half) reverted to 20020313           x
(4) add printf-cacheinfo                     x
(5) - no cninit                              x
(6) - no ddb init                            x

Status up to yesterday:
 (1)   (2)   (3)
 YES               works
 YES   YES         works
       YES         stops after start=0x100000
       YES   YES   works

Todays addition:
              +----syncicache-half-revert
              |
              |     +-- add printf-cacheinfo
              |     |
              |     |     +-- no cninit
              |     |     |
 (1)   (2)   (3)   (4)   (5)
             YES   YES        works (*1)
             YES   YES   YES  works (*1)
                   YES   YES  works (*1)
(*1) but no cacheinfo printed --- to early to use printf ?

I will attache diff to 20020314 for case (3)+(4)+(5)

cvs diff -u syssrc/sys/arch/macppc > ~/macppc/paren-5
cvs diff -u syssrc/sys/arch/powerpc >> ~/macppc/paren-5
cvs diff -u syssrc/sys/lib/libkern/arch/powerpc >> ~/macppc/paren-5
---
Makoto Fujiwara, 
Index: syssrc/sys/arch/macppc/macppc/machdep.c
===================================================================
RCS file: /cvsroot/syssrc/sys/arch/macppc/macppc/machdep.c,v
retrieving revision 1.110
diff -u -r1.110 machdep.c
--- machdep.c	2002/03/02 00:44:08	1.110
+++ machdep.c	2002/06/18 23:42:14
@@ -107,6 +107,7 @@
 struct proc *fpuproc;
 #endif
 
+extern void consinit_early(void);
 extern struct user *proc0paddr;
 extern int ofmsr;
 
@@ -381,8 +382,13 @@
 	 * but I really think the console should be initialized
 	 * as early as possible.
 	 */
-	consinit();
+	consinit_early();
 
+	printf("Cache info: ");
+	printf("isize %u, ilinesize %u, dsize %u, dlinesize %u\n",
+		ci->ci_ci.icache_size, ci->ci_ci.icache_line_size,
+		ci->ci_ci.dcache_size, ci->ci_ci.dcache_line_size);
+
 	/*
 	 * Set the page size.
 	 */
@@ -1090,3 +1096,38 @@
 #endif
 }
 #endif /* MULTIPROCESSOR */
+
+/*
+ * consinit
+ * Initialize system console.
+ */
+void
+consinit_early()
+{
+	static int initted;
+
+	if (initted)
+		return;
+	initted = 1;
+	/* cninit(); */
+
+#ifdef DDB
+	ddb_init((int)((u_int)endsym - (u_int)startsym), startsym, endsym);
+	if (boothowto & RB_KDB)
+		Debugger();
+#endif
+
+#ifdef IPKDB
+	ipkdb_init();
+	if (boothowto & RB_KDB)
+		ipkdb_connect(0);
+#endif
+
+#ifdef KGDB
+#if NZSC > 0
+	zs_kgdb_init();
+#endif
+	if (boothowto & RB_KDB)
+		kgdb_connect(1);
+#endif
+}
Index: syssrc/sys/lib/libkern/arch/powerpc/syncicache.c
===================================================================
RCS file: /cvsroot/syssrc/sys/lib/libkern/arch/powerpc/syncicache.c,v
retrieving revision 1.5
diff -u -r1.5 syncicache.c
--- syncicache.c	2002/03/13 00:59:29	1.5
+++ syncicache.c	2002/06/18 23:43:01
@@ -103,8 +103,8 @@
 		getcachelinesize();
 #endif	
 
-	if (CACHEINFO.dcache_size > 0) {
-		linesz = CACHEINFO.dcache_line_size;
+	if (1 > 0) {
+		linesz = 32;
 		off = (u_int)from & (linesz - 1);
 		l = len += off;
 		p = (char *)from - off;
@@ -115,8 +115,8 @@
 	}
 	__asm__ __volatile ("sync");
 
-	if (CACHEINFO.icache_size > 0 ) {
-		linesz = CACHEINFO.icache_line_size;
+	if (1 > 0 ) {
+		linesz = 32;
 		off = (u_int)from & (linesz - 1);
 		p = (char *)from - off;
 		do {