11123346bf
The ebony_exit() function which resets the Ebony board should in fact be common to most if not all 44x boards. This moves the function out into 44x.c, renaming it, so it can be used by other 44x platforms. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
57 lines
1.3 KiB
C
57 lines
1.3 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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