src/soc/samsung/exynos5420/trustzone.c

/*
 * This file is part of the coreboot project.
 *
 * Copyright 2013 Google Inc.
 * Copyright (C) 2012 Samsung Electronics
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <arch/io.h>
#include "trustzone.h"

/* Setting TZPC[TrustZone Protection Controller]
 * We pretty much disable it all, as the kernel
 * expects it that way -- and that's not the default.
 */
void trustzone_init(void)
{
	struct exynos_tzpc *tzpc;
	unsigned int addr;

	for (addr = TZPC10_BASE; addr <= TZPC9_BASE; addr += TZPC_BASE_OFFSET) {
		tzpc = (struct exynos_tzpc *)addr;
		if (addr == TZPC0_BASE)
			writel(R0SIZE, &tzpc->r0size);
		writel(DECPROTXSET, &tzpc->decprot0set);
		writel(DECPROTXSET, &tzpc->decprot1set);
		writel(DECPROTXSET, &tzpc->decprot2set);
		writel(DECPROTXSET, &tzpc->decprot3set);
	}
}