| David Gibson | f6dfc80 | 2007-05-08 14:10:01 +1000 | [diff] [blame^] | 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. */ |
| 25 | void 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 | } |