1/*
2 * Copyright 2007 David Gibson, IBM Corporation.
3 *
4 * Based on earlier code:
5 *   Matt Porter <mporter@kernel.crashing.org>
6 *   Copyright 2002-2005 MontaVista Software Inc.
7 *
8 *   Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
9 *   Copyright (c) 2003, 2004 Zultys Technologies
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
15 */
16#include <stddef.h>
17#include "types.h"
18#include "string.h"
19#include "stdio.h"
20#include "ops.h"
21#include "reg.h"
22#include "dcr.h"
23
24/* Read the 44x memory controller to get size of system memory. */
25void ibm44x_fixup_memsize(void)
26{
27	int i;
28	unsigned long memsize, bank_config;
29
30	memsize = 0;
31	for (i = 0; i < ARRAY_SIZE(sdram_bxcr); i++) {
32		mtdcr(DCRN_SDRAM0_CFGADDR, sdram_bxcr[i]);
33		bank_config = mfdcr(DCRN_SDRAM0_CFGDATA);
34
35		if (bank_config & SDRAM_CONFIG_BANK_ENABLE)
36			memsize += SDRAM_CONFIG_BANK_SIZE(bank_config);
37	}
38
39	dt_fixup_memory(0, memsize);
40}
41