blob: 990d8d4a6edc2ae5c1f5102f51c81521ab3fe05c [file] [log] [blame]
/*
* Copyright (c) 2014-2015, ARM Limited and Contributors. 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 ARM 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 HOLDER 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 <arm_def.h>
#include <debug.h>
#include <platform_def.h>
#include <tzc400.h>
/* Weak definitions may be overridden in specific ARM standard platform */
#pragma weak plat_arm_security_setup
/*******************************************************************************
* Initialize the TrustZone Controller for ARM standard platforms.
* Configure Region 0 with no access, Region 1 with secure access only, and
* the remaining DRAM regions access from the given Non-Secure masters.
******************************************************************************/
void arm_tzc_setup(void)
{
INFO("Configuring TrustZone Controller\n");
tzc_init(PLAT_ARM_TZC_BASE);
/* Disable filters. */
tzc_disable_filters();
/* Region 0 set to no access by default */
tzc_configure_region0(TZC_REGION_S_NONE, 0);
/* Region 1 set to cover Secure part of DRAM */
tzc_configure_region(PLAT_ARM_TZC_FILTERS, 1,
ARM_AP_TZC_DRAM1_BASE, ARM_AP_TZC_DRAM1_END,
TZC_REGION_S_RDWR,
0);
/* Region 2 set to cover Non-Secure access to 1st DRAM address range.
* Apply the same configuration to given filters in the TZC. */
tzc_configure_region(PLAT_ARM_TZC_FILTERS, 2,
ARM_NS_DRAM1_BASE, ARM_NS_DRAM1_END,
TZC_REGION_S_NONE,
PLAT_ARM_TZC_NS_DEV_ACCESS);
/* Region 3 set to cover Non-Secure access to 2nd DRAM address range */
tzc_configure_region(PLAT_ARM_TZC_FILTERS, 3,
ARM_DRAM2_BASE, ARM_DRAM2_END,
TZC_REGION_S_NONE,
PLAT_ARM_TZC_NS_DEV_ACCESS);
/*
* Raise an exception if a NS device tries to access secure memory
* TODO: Add interrupt handling support.
*/
tzc_set_action(TZC_ACTION_ERR);
/* Enable filters. */
tzc_enable_filters();
}
void plat_arm_security_setup(void)
{
arm_tzc_setup();
}