ixp425_mem.c revision 1.1 
1/*	$NetBSD: ixp425_mem.c,v 1.1 2020/02/12 06:57:35 thorpej Exp $	*/
2
3/*
4 * Copyright (c) 2003 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Steve C. Woodford for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *	This product includes software developed for the NetBSD Project by
20 *	Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 *    or promote products derived from this software without specific prior
23 *    written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38/*
39 * This file provides the mem_init() function for boards using the
40 * Intel IXP425 Network Processor.
41 */
42
43#include <sys/types.h>
44#include <lib/libsa/stand.h>
45
46#include <arm/xscale/ixp425reg.h>
47
48#include "board.h"
49
50#define	MCU_REG_READ(x)	(*(volatile uint32_t *)(IXP425_MCU_HWBASE + (x)))
51
52static const uint32_t sdram_64bit[] = {
53	0x00800000,	/* 8M:  One 2M x 32 chip */
54	0x01000000,	/* 16M: Two 2M x 32 chips */
55	0x01000000,	/* 16M: One 4M x 32 chip */
56	0x02000000,	/* 32M: Two 4M x 32 chips */
57	0, 0, 0, 0
58};
59
60static const uint32_t sdram_other[] = {
61	0x02000000,	/*  32M: Two   8M x 16 chips */
62	0x04000000,	/*  64M: Four  8M x 16 chips */
63	0x04000000,	/*  64M: Two  16M x 16 chips */
64	0x08000000,	/* 128M: Four 16M x 16 chips */
65	0x08000000,	/* 128M: Two  32M x 16 chips */
66	0x10000000,	/* 256M: Four 32M x 16 chips */
67	0, 0
68};
69
70void
71mem_init(void)
72{
73	uint32_t sdr_config;
74	uint32_t start, size, heap;
75
76	sdr_config = MCU_REG_READ(MCU_SDR_CONFIG);
77
78	start = 0x00000000;		/* fixed SDRAM base address */
79
80	if (sdr_config & MCU_SDR_CONFIG_64MBIT)
81		size = sdram_64bit[MCU_SDR_CONFIG_MCONF(sdr_config)];
82	else
83		size = sdram_other[MCU_SDR_CONFIG_MCONF(sdr_config)];
84
85	if (size == 0) {
86		printf("** SDR_CONFIG returns unknown value, using 32M\n");
87		size = 32 * 1024 * 1024;
88	}
89
90	heap = (start + size) - BOARD_HEAP_SIZE;
91
92	printf(">> RAM 0x%x - 0x%x, heap at 0x%x\n",
93	    start, (start + size) - 1, heap);
94	setheap((void *)heap, (void *)(start + size - 1));
95}
96