Add support for picking up the size of SDRAM by reading the memory
controller's config register.
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scw
parent
37efcf9045
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40db825e26
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@ -1,9 +1,10 @@
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# $NetBSD: files.ixp425,v 1.5 2003/11/16 12:41:03 scw Exp $
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# $NetBSD: files.ixp425,v 1.6 2003/12/08 14:41:11 scw Exp $
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#
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# Configuration info for Intel IXP4xx CPU support
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#
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file arch/arm/xscale/ixp425_intr.c
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file arch/arm/xscale/ixp425_mem.c
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file arch/arm/arm32/irq_dispatch.S
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file arch/arm/xscale/xscale_pmc.c perfctrs
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/* $NetBSD: ixp425_mem.c,v 1.1 2003/12/08 14:41:11 scw Exp $ */
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/*
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* Copyright (c) 2003 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Steve C. Woodford 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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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: ixp425_mem.c,v 1.1 2003/12/08 14:41:11 scw Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <arm/xscale/ixp425reg.h>
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#include <arm/xscale/ixp425var.h>
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static uint32_t sdram_64bit[] = {
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0x00800000, /* 8M: One 2M x 32 chip */
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0x01000000, /* 16M: Two 2M x 32 chips */
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0x01000000, /* 16M: One 4M x 32 chip */
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0x02000000, /* 32M: Two 4M x 32 chips */
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0, 0, 0, 0
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};
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static uint32_t sdram_other[] = {
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0x02000000, /* 32M: Two 8M x 16 chips */
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0x04000000, /* 64M: Four 8M x 16 chips */
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0x04000000, /* 64M: Two 16M x 16 chips */
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0x08000000, /* 128M: Four 16M x 16 chips */
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0x08000000, /* 128M: Two 32M x 16 chips */
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0x10000000, /* 256M: Four 32M x 16 chips */
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0, 0
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};
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#define MCU_REG_READ(x) (*(volatile uint32_t *)(IXP425_MCU_VBASE + (x)))
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uint32_t
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ixp425_sdram_size(void)
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{
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uint32_t size, sdr_config;
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sdr_config = MCU_REG_READ(MCU_SDR_CONFIG);
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if (sdr_config & MCU_SDR_CONFIG_64MBIT)
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size = sdram_64bit[MCU_SDR_CONFIG_MCONF(sdr_config)];
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else
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size = sdram_other[MCU_SDR_CONFIG_MCONF(sdr_config)];
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if (size == 0) {
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printf("** SDR_CONFIG retuns unknown value, using 32M\n");
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size = 32 * 1024 * 1024;
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}
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return (size);
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}
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@ -1,4 +1,4 @@
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/* $NetBSD: ixp425reg.h,v 1.15 2003/12/08 13:40:33 scw Exp $ */
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/* $NetBSD: ixp425reg.h,v 1.16 2003/12/08 14:41:11 scw Exp $ */
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/*
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* Copyright (c) 2003
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* Ichiro FUKUHARA <ichiro@ichiro.org>.
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@ -445,7 +445,12 @@
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* SDRAM Configuration Register
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*/
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#define IXP425_MCU_HWBASE 0xcc000000UL
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#define IXP425_MCU_VBASE (IXP425_PCI_VBASE + IXP425_PCI_SIZE)
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/* 0xf0012000 */
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#define IXP425_MCU_SIZE 0x1000 /* Actually only 256 bytes */
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#define MCU_SDR_CONFIG 0x00
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#define MCU_SDR_CONFIG_MCONF(x) ((x) & 0x7)
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#define MCU_SDR_CONFIG_64MBIT (1u << 5)
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#define MCU_SDR_REFRESH 0x04
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#define MCU_SDR_IR 0x08
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@ -1,4 +1,4 @@
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/* $NetBSD: ixp425var.h,v 1.7 2003/11/02 21:24:39 scw Exp $ */
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/* $NetBSD: ixp425var.h,v 1.8 2003/12/08 14:41:11 scw Exp $ */
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/*
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* Copyright (c) 2003
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@ -148,5 +148,6 @@ void ixp425_intr_init(void);
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void *ixp425_intr_establish(int, int, int (*)(void *), void *);
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void ixp425_intr_disestablish(void *);
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uint32_t ixp425_sdram_size(void);
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#endif /* _IXP425VAR_H_ */
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