99 lines
3.3 KiB
C
99 lines
3.3 KiB
C
/* $NetBSD: becc_mem.c,v 1.3 2006/01/16 19:34:53 he Exp $ */
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/*
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* Copyright (c) 2002, 2003 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Jason R. Thorpe for Wasabi Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* This file provides the mem_init() function for boards using the
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* ADI BECC companion chip.
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*/
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#include <sys/types.h>
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#include <lib/libsa/stand.h>
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#include <arm/xscale/beccreg.h>
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#include <dev/pci/pcireg.h>
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#include "board.h"
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#define BECC_PCICORE_READ(x) \
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*((volatile uint32_t *) \
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(BECC_PCI_CONF_BASE | (1U << BECC_IDSEL_BIT) | (x)))
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#define BECC_PCICORE_WRITE(x, v) \
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*((volatile uint32_t *) \
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(BECC_PCI_CONF_BASE | (1U << BECC_IDSEL_BIT) | (x))) = (v)
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#define BECC_SDRAM_BAR (PCI_MAPREG_START + 0x08)
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void
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mem_init(void)
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{
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uint32_t start, size, reg, save, heap;
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start = BECC_SDRAM_BASE;
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/*
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* BECC <= Rev7 can only address 64M through the inbound PCI
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* windows. Limit memory to 64M on those revs.
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*
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* On >= Rev8, there is a BAR which covers all of SDRAM which
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* we can probe for the memory size.
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*/
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reg = BECC_PCICORE_READ(PCI_CLASS_REG);
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#ifdef BECC_SUPPORT_V7
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if (PCI_REVISION(reg) <= BECC_REV_V7)
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size = (64U * 1024 * 1024);
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else {
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#endif
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save = BECC_PCICORE_READ(BECC_SDRAM_BAR);
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BECC_PCICORE_WRITE(BECC_SDRAM_BAR, 0xffffffffU);
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reg = BECC_PCICORE_READ(BECC_SDRAM_BAR);
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BECC_PCICORE_WRITE(BECC_SDRAM_BAR, save);
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save = BECC_PCICORE_READ(BECC_SDRAM_BAR);
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size = PCI_MAPREG_MEM_SIZE(reg);
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#ifdef BECC_SUPPORT_V7
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}
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#endif
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heap = (start + size) - BOARD_HEAP_SIZE;
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printf(">> RAM 0x%x - 0x%x, heap at 0x%x\n",
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start, (start + size) - 1, heap);
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setheap((void *)heap, (void *)(start + size - 1));
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}
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