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Add a standalone routine for fetching the memory size from the

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core module on an ARM Integrator board.
This commit is contained in:
thorpej 2002-04-18 05:30:45 +00:00
parent 86920876dd
commit 0f3cb4bcae
1 changed files with 90 additions and 0 deletions
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sys/arch/evbarm/stand/board/integrator_mem.c Normal file
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/* $NetBSD: integrator_mem.c,v 1.1 2002/04/18 05:30:45 thorpej Exp $ */
/*
* Copyright (c) 2002 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 ARM Integrator
* core modules.
*/
#include <sys/types.h>
#include <lib/libsa/stand.h>
#include "board.h"
#define INL(x) *((__volatile uint32_t *) (x))
void
mem_init(void)
{
uint32_t cm_sdram;
uint32_t heap, size;
cm_sdram = INL(0x10000020);
switch ((cm_sdram >> 2) & 0x7) {
case 0:
size = 16 * 1024 * 1024;
break;
case 1:
size = 32 * 1024 * 1024;
break;
case 2:
size = 64 * 1024 * 1024;
break;
case 3:
size = 128 * 1024 * 1024;
break;
case 4:
size = 256 * 1024 * 1024;
break;
default:
printf("** CM_SDRAM retuns unknown value, using 16M\n");
size = 16 * 1024 * 1024;
break;
}
/* Start is always 0. */
heap = size - 0x30000;
printf(">> RAM 0x%x - 0x%x, heap at 0x%x\n", 0, size - 1, heap);
setheap((void *)heap, (void *)size);
}