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