uboot-vybrid_public/arch/arm/cpu/armv7/exynos/tzpc.c

/*
 * Lowlevel setup for SMDK5250 board based on S5PC520
 *
 * Copyright (C) 2012 Samsung Electronics
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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; either version 2 of
 * the License, or (at your option) any later version.
 *
 * 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., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <common.h>
#include <asm/arch/tzpc.h>
#include <asm/io.h>

/* Setting TZPC[TrustZone Protection Controller] */
void tzpc_init(void)
{
	struct exynos_tzpc *tzpc;
	unsigned int addr, start = 0, end = 0;

	start = samsung_get_base_tzpc();

	if (cpu_is_exynos5())
		end = start + ((EXYNOS5_NR_TZPC_BANKS - 1) * TZPC_BASE_OFFSET);
	else if (cpu_is_exynos4())
		end = start + ((EXYNOS4_NR_TZPC_BANKS - 1) * TZPC_BASE_OFFSET);

	for (addr = start; addr <= end; addr += TZPC_BASE_OFFSET) {
		tzpc = (struct exynos_tzpc *)addr;

		if (addr == start)
			writel(R0SIZE, &tzpc->r0size);

		writel(DECPROTXSET, &tzpc->decprot0set);
		writel(DECPROTXSET, &tzpc->decprot1set);

		if (cpu_is_exynos5() && (addr == end))
			break;

		writel(DECPROTXSET, &tzpc->decprot2set);
		writel(DECPROTXSET, &tzpc->decprot3set);
	}
}