86 lines
2.0 KiB
C
86 lines
2.0 KiB
C
/*
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* Copyright 2007 David Gibson, IBM Corporation.
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*
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* Based on earlier code:
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* Matt Porter <mporter@kernel.crashing.org>
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* Copyright 2002-2005 MontaVista Software Inc.
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*
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* Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
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* Copyright (c) 2003, 2004 Zultys Technologies
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <stddef.h>
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#include "types.h"
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#include "string.h"
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#include "stdio.h"
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#include "ops.h"
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#include "reg.h"
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#include "dcr.h"
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/* Read the 44x memory controller to get size of system memory. */
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void ibm44x_fixup_memsize(void)
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{
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int i;
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unsigned long memsize, bank_config;
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memsize = 0;
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for (i = 0; i < ARRAY_SIZE(sdram_bxcr); i++) {
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mtdcr(DCRN_SDRAM0_CFGADDR, sdram_bxcr[i]);
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bank_config = mfdcr(DCRN_SDRAM0_CFGDATA);
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if (bank_config & SDRAM_CONFIG_BANK_ENABLE)
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memsize += SDRAM_CONFIG_BANK_SIZE(bank_config);
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}
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dt_fixup_memory(0, memsize);
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}
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#define SPRN_DBCR0 0x134
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#define DBCR0_RST_SYSTEM 0x30000000
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void ibm44x_dbcr_reset(void)
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{
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unsigned long tmp;
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asm volatile (
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"mfspr %0,%1\n"
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"oris %0,%0,%2@h\n"
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"mtspr %1,%0"
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: "=&r"(tmp) : "i"(SPRN_DBCR0), "i"(DBCR0_RST_SYSTEM)
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);
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}
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/* Read 4xx EBC bus bridge registers to get mappings of the peripheral
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* banks into the OPB address space */
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void ibm4xx_fixup_ebc_ranges(const char *ebc)
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{
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void *devp;
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u32 bxcr;
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u32 ranges[EBC_NUM_BANKS*4];
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u32 *p = ranges;
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int i;
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for (i = 0; i < EBC_NUM_BANKS; i++) {
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mtdcr(DCRN_EBC0_CFGADDR, EBC_BXCR(i));
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bxcr = mfdcr(DCRN_EBC0_CFGDATA);
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if ((bxcr & EBC_BXCR_BU) != EBC_BXCR_BU_OFF) {
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*p++ = i;
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*p++ = 0;
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*p++ = bxcr & EBC_BXCR_BAS;
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*p++ = EBC_BXCR_BANK_SIZE(bxcr);
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}
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}
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devp = finddevice(ebc);
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if (! devp)
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fatal("Couldn't locate EBC node %s\n\r", ebc);
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setprop(devp, "ranges", ranges, (p - ranges) * sizeof(u32));
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}
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