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 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