1 files changed, 40 insertions, 0 deletions

diff --git a/arch/powerpc/boot/44x.c b/arch/powerpc/boot/44x.c
new file mode 100644
index 000000000000..d51377d9024f
--- /dev/null
+++ b/arch/powerpc/boot/44x.c
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2007 David Gibson, IBM Corporation.
+ *
+ * Based on earlier code:
+ *   Matt Porter <mporter@kernel.crashing.org>
+ *   Copyright 2002-2005 MontaVista Software Inc.
+ *
+ *   Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
+ *   Copyright (c) 2003, 2004 Zultys Technologies
+ *
+ * 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.
+ */
+#include <stddef.h>
+#include "types.h"
+#include "string.h"
+#include "stdio.h"
+#include "ops.h"
+#include "reg.h"
+#include "dcr.h"
+
+/* Read the 44x memory controller to get size of system memory. */
+void ibm44x_fixup_memsize(void)
+{
+        int i;
+        unsigned long memsize, bank_config;
+
+        memsize = 0;
+        for (i = 0; i < ARRAY_SIZE(sdram_bxcr); i++) {
+                mtdcr(DCRN_SDRAM0_CFGADDR, sdram_bxcr[i]);
+                bank_config = mfdcr(DCRN_SDRAM0_CFGDATA);
+
+                if (bank_config & SDRAM_CONFIG_BANK_ENABLE)
+                        memsize += SDRAM_CONFIG_BANK_SIZE(bank_config);
+        }
+
+        dt_fixup_memory(0, memsize);
+}