xref: /src/sys/arch/evbarm/stand/board/smdk2410.c

/* $NetBSD: smdk2410.c,v 1.1 2003/09/03 03:18:30 mycroft Exp $ */

/*
 * Copyright (c) 2003 By Noon Software, Inc.  All rights reserved.
 *
 * 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. The names of the authors may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``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 THE AUTHORS 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.
 */

/*
 * Board initialization routines for the Samsung's SMDK2410.
 */

#include <sys/types.h>
#include <lib/libsa/stand.h>
#include <arch/arm/s3c2xx0/s3c2410reg.h>

#include "board.h"

void
board_init(void)
{

	mem_init();
}

void
board_fini(void)
{

}

void
mem_init(void)
{
	uint32_t start, size, heap;

	start = S3C2410_SDRAM_START;
	size = SDRAM_SIZE;

	heap = (start + size) - HEAP_SIZE;

	printf(">> RAM 0x%x - 0x%x, heap at 0x%x\n",
	    start, (start + size) - 1, heap);
	setheap((void *)heap, (void *)(heap + HEAP_SIZE - 1));
}

long get_com_freq(void);
long
get_com_freq(void)
{
	long clk;
	uint32_t pllcon = *(volatile uint32_t *)(S3C2410_CLKMAN_BASE+CLKMAN_MPLLCON);
	uint32_t clkdivn = *(volatile uint32_t *)(S3C2410_CLKMAN_BASE+CLKMAN_CLKDIVN);

	int mdiv = (pllcon & PLLCON_MDIV_MASK) >> PLLCON_MDIV_SHIFT;
	int pdiv = (pllcon & PLLCON_PDIV_MASK) >> PLLCON_PDIV_SHIFT;
	int sdiv = (pllcon & PLLCON_SDIV_MASK) >> PLLCON_SDIV_SHIFT;

#if XTAL_CLK < 1000   /* in MHz */
	clk = (XTAL_CLK * 1000000 * (8 + mdiv)) / ((pdiv + 2) << sdiv);
#else /* in Hz */
	clk = (XTAL_CLK * (8 + mdiv)) / ((pdiv + 2) << sdiv);
#endif

	if (clkdivn & CLKDIVN_HDIVN)
		clk /= 2;
	if (clkdivn & CLKDIVN_PDIVN)
		clk /= 2;

	return clk;
}