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
52 static 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
60 static 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
70 void
mem_init(void)71 mem_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