/* $NetBSD: ixp425_mem.c,v 1.1 2020/02/12 06:57:35 thorpej Exp $ */

/* $NetBSD: ixp425_mem.c,v 1.1 2020/02/12 06:57:35 thorpej Exp $ */

/*
* Copyright (c) 2003 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Steve C. Woodford for Wasabi Systems, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/

/*
* This file provides the mem_init() function for boards using the
* Intel IXP425 Network Processor.
*/

#include <sys/types.h>
#include <lib/libsa/stand.h>

#include <arm/xscale/ixp425reg.h>

#include "board.h"

#define MCU_REG_READ(x) (*(volatile uint32_t *)(IXP425_MCU_HWBASE + (x)))

static const uint32_t sdram_64bit[] = {
0x00800000, /* 8M: One 2M x 32 chip */
0x01000000, /* 16M: Two 2M x 32 chips */
0x01000000, /* 16M: One 4M x 32 chip */
0x02000000, /* 32M: Two 4M x 32 chips */
0, 0, 0, 0
};

static const uint32_t sdram_other[] = {
0x02000000, /* 32M: Two 8M x 16 chips */
0x04000000, /* 64M: Four 8M x 16 chips */
0x04000000, /* 64M: Two 16M x 16 chips */
0x08000000, /* 128M: Four 16M x 16 chips */
0x08000000, /* 128M: Two 32M x 16 chips */
0x10000000, /* 256M: Four 32M x 16 chips */
0, 0
};

void
mem_init(void)
{
uint32_t sdr_config;
uint32_t start, size, heap;

sdr_config = MCU_REG_READ(MCU_SDR_CONFIG);

start = 0x00000000; /* fixed SDRAM base address */

if (sdr_config & MCU_SDR_CONFIG_64MBIT)
size = sdram_64bit[MCU_SDR_CONFIG_MCONF(sdr_config)];
else
size = sdram_other[MCU_SDR_CONFIG_MCONF(sdr_config)];

if (size == 0) {
printf("** SDR_CONFIG returns unknown value, using 32M\n");
size = 32 * 1024 * 1024;
}

heap = (start + size) - BOARD_HEAP_SIZE;

printf(">> RAM 0x%x - 0x%x, heap at 0x%x\n",
start, (start + size) - 1, heap);
setheap((void *)heap, (void *)(start + size - 1));
}