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/*
* Copyright (c) 2016, 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 <assert.h>
#include <debug.h>
#include <platform_def.h>
#include <tzc_dmc500.h>
/*******************************************************************************
* Initialize the DMC500-TrustZone Controller for ARM standard platforms.
* Configure both the interfaces on Region 0 with no access, Region 1 with
* secure access only, and the remaining DRAM regions access from the
* given Non-Secure masters.
*
* When booting an EL3 payload, this is simplified: we configure region 0 with
* secure access only and do not enable any other region.
******************************************************************************/
void arm_tzc_dmc500_setup(tzc_dmc500_driver_data_t *plat_driver_data)
{
assert(plat_driver_data);
INFO("Configuring DMC-500 TZ Settings\n");
tzc_dmc500_driver_init(plat_driver_data);
#ifndef EL3_PAYLOAD_BASE
/* Region 0 set to no access by default */
tzc_dmc500_configure_region0(TZC_REGION_S_NONE, 0);
/* Region 1 set to cover Secure part of DRAM */
tzc_dmc500_configure_region(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.*/
tzc_dmc500_configure_region(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_dmc500_configure_region(3,
ARM_DRAM2_BASE,
ARM_DRAM2_END,
TZC_REGION_S_NONE,
PLAT_ARM_TZC_NS_DEV_ACCESS);
#else
/* Allow secure access only to DRAM for EL3 payloads */
tzc_dmc500_configure_region0(TZC_REGION_S_RDWR, 0);
#endif
/*
* Raise an exception if a NS device tries to access secure memory
* TODO: Add interrupt handling support.
*/
tzc_dmc500_set_action(TZC_ACTION_RV_LOWERR);
/*
* Flush the configuration settings to have an affect. Validate
* flush by checking FILTER_EN is set on region 1 attributes
* register.
*/
tzc_dmc500_config_complete();
/*
* Wait for the flush to complete.
* TODO: Have a timeout for this loop
*/
while (tzc_dmc500_verify_complete())
;
}
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