platform/copper/platform.c

/*
 * Copyright (c) 2012, Code Aurora Forum. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * 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.
 *  * Neither the name of Google, Inc. nor the names of its contributors
 *    may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "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
 * COPYRIGHT OWNER OR CONTRIBUTORS 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.
 */

#include <debug.h>
#include <reg.h>
#include <platform/iomap.h>
#include <qgic.h>

static void platform_init_timer(void);

static uint32_t ticks_per_sec = 0;

#define MB (1024*1024)

void platform_early_init(void)
{
	qgic_init();
	platform_init_timer();
}

void platform_init(void)
{
	dprintf(INFO, "platform_init()\n");
}

void platform_uninit(void)
{
}

/* Initialize Qtimer */
static void platform_init_timer(void)
{
	uint32_t freq;

	/* program the Global counter frequency to 19.2 MHz
	 * Currently, this is the only frequency allowed.
	 * and this routine is a no-op since the simulation
	 * has already set to this frequency.
	 */
	freq = (192*1000*100);

	__asm__("mcr p15, 0, %0, c14, c0, 0" : : "r" (freq));

	ticks_per_sec = 192*1000*100;
}

/* Returns timer ticks per sec */
uint32_t platform_tick_rate(void)
{
	return ticks_per_sec;
}