77 lines
2.2 KiB
C
77 lines
2.2 KiB
C
/*
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* Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <arm_def.h>
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#include <assert.h>
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#include <debug.h>
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#include <platform_def.h>
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#include <tzc_dmc500.h>
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/*******************************************************************************
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* Initialize the DMC500-TrustZone Controller for ARM standard platforms.
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* Configure both the interfaces on Region 0 with no access, Region 1 with
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* secure access only, and the remaining DRAM regions access from the
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* given Non-Secure masters.
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*
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* When booting an EL3 payload, this is simplified: we configure region 0 with
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* secure access only and do not enable any other region.
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******************************************************************************/
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void arm_tzc_dmc500_setup(tzc_dmc500_driver_data_t *plat_driver_data)
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{
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assert(plat_driver_data);
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INFO("Configuring DMC-500 TZ Settings\n");
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tzc_dmc500_driver_init(plat_driver_data);
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#ifndef EL3_PAYLOAD_BASE
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/* Region 0 set to no access by default */
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tzc_dmc500_configure_region0(TZC_REGION_S_NONE, 0);
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/* Region 1 set to cover Secure part of DRAM */
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tzc_dmc500_configure_region(1, ARM_AP_TZC_DRAM1_BASE,
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ARM_AP_TZC_DRAM1_END,
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TZC_REGION_S_RDWR,
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0);
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/* Region 2 set to cover Non-Secure access to 1st DRAM address range.*/
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tzc_dmc500_configure_region(2,
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ARM_NS_DRAM1_BASE,
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ARM_NS_DRAM1_END,
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TZC_REGION_S_NONE,
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PLAT_ARM_TZC_NS_DEV_ACCESS);
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/* Region 3 set to cover Non-Secure access to 2nd DRAM address range */
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tzc_dmc500_configure_region(3,
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ARM_DRAM2_BASE,
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ARM_DRAM2_END,
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TZC_REGION_S_NONE,
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PLAT_ARM_TZC_NS_DEV_ACCESS);
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#else
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/* Allow secure access only to DRAM for EL3 payloads */
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tzc_dmc500_configure_region0(TZC_REGION_S_RDWR, 0);
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#endif
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/*
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* Raise an exception if a NS device tries to access secure memory
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* TODO: Add interrupt handling support.
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*/
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tzc_dmc500_set_action(TZC_ACTION_RV_LOWERR);
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/*
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* Flush the configuration settings to have an affect. Validate
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* flush by checking FILTER_EN is set on region 1 attributes
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* register.
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*/
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tzc_dmc500_config_complete();
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/*
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* Wait for the flush to complete.
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* TODO: Have a timeout for this loop
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*/
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while (tzc_dmc500_verify_complete())
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;
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}
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