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