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