1 /* $NetBSD: becc_mem.c,v 1.3 2006/01/16 19:34:53 he Exp $ */ 2 3 /* 4 * Copyright (c) 2002, 2003 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe 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 * ADI BECC companion chip. 41 */ 42 43 #include <sys/types.h> 44 #include <lib/libsa/stand.h> 45 46 #include <arm/xscale/beccreg.h> 47 48 #include <dev/pci/pcireg.h> 49 50 #include "board.h" 51 52 #define BECC_PCICORE_READ(x) \ 53 *((volatile uint32_t *) \ 54 (BECC_PCI_CONF_BASE | (1U << BECC_IDSEL_BIT) | (x))) 55 56 #define BECC_PCICORE_WRITE(x, v) \ 57 *((volatile uint32_t *) \ 58 (BECC_PCI_CONF_BASE | (1U << BECC_IDSEL_BIT) | (x))) = (v) 59 60 #define BECC_SDRAM_BAR (PCI_MAPREG_START + 0x08) 61 62 void 63 mem_init(void) 64 { 65 uint32_t start, size, reg, save, heap; 66 67 start = BECC_SDRAM_BASE; 68 69 /* 70 * BECC <= Rev7 can only address 64M through the inbound PCI 71 * windows. Limit memory to 64M on those revs. 72 * 73 * On >= Rev8, there is a BAR which covers all of SDRAM which 74 * we can probe for the memory size. 75 */ 76 reg = BECC_PCICORE_READ(PCI_CLASS_REG); 77 #ifdef BECC_SUPPORT_V7 78 if (PCI_REVISION(reg) <= BECC_REV_V7) 79 size = (64U * 1024 * 1024); 80 else { 81 #endif 82 save = BECC_PCICORE_READ(BECC_SDRAM_BAR); 83 BECC_PCICORE_WRITE(BECC_SDRAM_BAR, 0xffffffffU); 84 reg = BECC_PCICORE_READ(BECC_SDRAM_BAR); 85 BECC_PCICORE_WRITE(BECC_SDRAM_BAR, save); 86 save = BECC_PCICORE_READ(BECC_SDRAM_BAR); 87 88 size = PCI_MAPREG_MEM_SIZE(reg); 89 #ifdef BECC_SUPPORT_V7 90 } 91 #endif 92 93 heap = (start + size) - BOARD_HEAP_SIZE; 94 95 printf(">> RAM 0x%x - 0x%x, heap at 0x%x\n", 96 start, (start + size) - 1, heap); 97 setheap((void *)heap, (void *)(start + size - 1)); 98 } 99