2 * Copyright 2007 David Gibson, IBM Corporation.
4 * Based on earlier code:
5 * Matt Porter <mporter@kernel.crashing.org>
6 * Copyright 2002-2005 MontaVista Software Inc.
8 * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
9 * Copyright (c) 2003, 2004 Zultys Technologies
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.
24 /* Read the 44x memory controller to get size of system memory. */
25 void ibm44x_fixup_memsize(void)
28 unsigned long memsize, bank_config;
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);
35 if (bank_config & SDRAM_CONFIG_BANK_ENABLE)
36 memsize += SDRAM_CONFIG_BANK_SIZE(bank_config);
39 dt_fixup_memory(0, memsize);
42 #define SPRN_DBCR0 0x134
43 #define DBCR0_RST_SYSTEM 0x30000000
45 void ibm44x_dbcr_reset(void)
53 : "=&r"(tmp) : "i"(SPRN_DBCR0), "i"(DBCR0_RST_SYSTEM)
58 /* Read 4xx EBC bus bridge registers to get mappings of the peripheral
59 * banks into the OPB address space */
60 void ibm4xx_fixup_ebc_ranges(const char *ebc)
64 u32 ranges[EBC_NUM_BANKS*4];
68 for (i = 0; i < EBC_NUM_BANKS; i++) {
69 mtdcr(DCRN_EBC0_CFGADDR, EBC_BXCR(i));
70 bxcr = mfdcr(DCRN_EBC0_CFGDATA);
72 if ((bxcr & EBC_BXCR_BU) != EBC_BXCR_BU_OFF) {
75 *p++ = bxcr & EBC_BXCR_BAS;
76 *p++ = EBC_BXCR_BANK_SIZE(bxcr);
80 devp = finddevice(ebc);
82 fatal("Couldn't locate EBC node %s\n\r", ebc);
84 setprop(devp, "ranges", ranges, (p - ranges) * sizeof(u32));