diff -ur linux.old/arch/mips/kernel/head.S linux.dev/arch/mips/kernel/head.S
--- linux.old/arch/mips/kernel/head.S	2006-12-06 17:30:27.000000000 +0100
+++ linux.dev/arch/mips/kernel/head.S	2006-12-06 18:34:43.000000000 +0100
@@ -129,15 +129,20 @@
 #endif
 	.endm
 
-
 	j kernel_entry
 	nop
-
+	nop
+	
 	/*
 	 * Reserved space for exception handlers.
 	 * Necessary for machines which link their kernels at KSEG0.
+	 * Use as temporary storage for the kernel command line, so that it
+	 * can be updated easily without having to relink the kernel.
 	 */
-	.fill	0x400
+	 
+EXPORT(_image_cmdline)
+	.ascii "CMDLINE:"
+	.fill	0x3ec
 
 EXPORT(stext)					# used for profiling
 EXPORT(_stext)
diff -ur linux.old/arch/mips/adm5120/prom.c linux.dev/arch/mips/adm5120/prom.c
--- linux.old/arch/mips/adm5120/prom.c	2006-12-06 17:30:27.000000000 +0100
+++ linux.dev/arch/mips/adm5120/prom.c	2006-12-06 17:41:40.000000000 +0100
@@ -100,6 +100,7 @@
 }
 
 
+extern char _image_cmdline;
 /*
  * initialize the prom module.
  */
@@ -112,8 +112,10 @@
 	mips_machtype = adm5120_board.mach_type;
 
 	/* init command line, register a default kernel command line */
-	strcpy(&(arcs_cmdline[0]), CONFIG_CMDLINE);
+	char *cmd = &_image_cmdline + 8;
+	if( strlen(cmd) > 0) strcpy( &(arcs_cmdline[0]), cmd);
+		else strcpy(&(arcs_cmdline[0]), CONFIG_CMDLINE);
 
 	/* init memory map */
 	prom_meminit();
 }