This patch adds support for a new arm920 cp15 command to access
coporocessor registers from the ocmmand line.

Signed-off-by: Harald Welte <laforge@openmoko.org>

Index: u-boot/common/Makefile
===================================================================
--- u-boot.orig/common/Makefile	2007-02-26 14:11:57.000000000 +0100
+++ u-boot/common/Makefile	2007-02-26 14:14:16.000000000 +0100
@@ -27,7 +27,7 @@
 
 AOBJS	=
 
-COBJS	= main.o ACEX1K.o altera.o bedbug.o circbuf.o cmd_autoscript.o \
+COBJS	= main.o ACEX1K.o altera.o bedbug.o circbuf.o cmd_arm920.o cmd_autoscript.o \
 	  cmd_bdinfo.o cmd_bedbug.o cmd_bmp.o cmd_boot.o cmd_bootm.o \
 	  cmd_cache.o cmd_console.o \
 	  cmd_date.o cmd_dcr.o cmd_diag.o cmd_display.o cmd_doc.o cmd_dtt.o \
Index: u-boot/common/cmd_arm920.c
===================================================================
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ u-boot/common/cmd_arm920.c	2007-02-26 14:14:36.000000000 +0100
@@ -0,0 +1,64 @@
+/*
+ * (C) Copyright 2006 by OpenMoko, Inc.
+ * Author: Harald Welte <laforge@openmoko.org>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/*
+ * Boot support
+ */
+#include <common.h>
+#include <command.h>
+#include <net.h>		/* for print_IPaddr */
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#if (CONFIG_COMMANDS & CFG_CMD_BDI)
+
+extern unsigned long read_p15_c1(void);
+extern void write_p15_c1(unsigned long);
+
+int do_arm920 ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+	int i;
+
+	if (strcmp(argv[1], "cp15c1")) {
+		printf("Usage:\n%s\n", cmdtp->usage);
+		return 1;
+	}
+
+	if (!strcmp(argv[2], "write")) {
+		ulong val = simple_strtoul(argv[3], NULL, 16);
+		printf("setting cp15c1 to 0x%08x\n", val);
+		write_p15_c1(val);
+	} else if (!strcmp(argv[2], "read"))
+		printf("cp15c1 = 0x%08x\n", read_p15_c1());
+
+	return 0;
+}
+
+/* -------------------------------------------------------------------- */
+
+U_BOOT_CMD(
+	arm920,	4,	1,	do_arm920,
+	"arm920_cp15  - print cp15\n",
+	NULL
+);
+#endif	/* CFG_CMD_BDI */
Index: u-boot/cpu/arm920t/cpu.c
===================================================================
--- u-boot.orig/cpu/arm920t/cpu.c	2007-02-26 04:37:19.000000000 +0100
+++ u-boot/cpu/arm920t/cpu.c	2007-02-26 14:13:31.000000000 +0100
@@ -38,7 +38,7 @@
 #endif
 
 /* read co-processor 15, register #1 (control register) */
-static unsigned long read_p15_c1 (void)
+unsigned long read_p15_c1 (void)
 {
 	unsigned long value;
 
@@ -55,7 +55,7 @@
 }
 
 /* write to co-processor 15, register #1 (control register) */
-static void write_p15_c1 (unsigned long value)
+void write_p15_c1 (unsigned long value)
 {
 #ifdef MMU_DEBUG
 	printf ("write %08lx to p15/c1\n", value);