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/*
* Copyright (c) 2016-2018, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <assert.h>
#include <platform_def.h>
#include <common/debug.h>
#include <drivers/arm/tzc_dmc500.h>
#include <plat/arm/common/plat_arm.h>
/*******************************************************************************
* Initialize the DMC500-TrustZone Controller for ARM standard platforms.
* 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,
const arm_tzc_regions_info_t *tzc_regions)
{
#ifndef EL3_PAYLOAD_BASE
unsigned int region_index = 1U;
const arm_tzc_regions_info_t *p;
const arm_tzc_regions_info_t init_tzc_regions[] = {
ARM_TZC_REGIONS_DEF,
{0}
};
#endif
assert(plat_driver_data);
INFO("Configuring DMC-500 TZ Settings\n");
tzc_dmc500_driver_init(plat_driver_data);
#ifndef EL3_PAYLOAD_BASE
if (tzc_regions == NULL)
p = init_tzc_regions;
else
p = tzc_regions;
/* Region 0 set to no access by default */
tzc_dmc500_configure_region0(TZC_REGION_S_NONE, 0);
/* Rest Regions set according to tzc_regions array */
for (; p->base != 0ULL; p++) {
tzc_dmc500_configure_region(region_index, p->base, p->end,
p->sec_attr, p->nsaid_permissions);
region_index++;
}
INFO("Total %u regions set.\n", region_index);
#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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