1 /* 2 * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <arm_def.h> 8 #include <assert.h> 9 #include <debug.h> 10 #include <platform_def.h> 11 #include <tzc_dmc500.h> 12 13 /******************************************************************************* 14 * Initialize the DMC500-TrustZone Controller for ARM standard platforms. 15 * Configure both the interfaces on Region 0 with no access, Region 1 with 16 * secure access only, and the remaining DRAM regions access from the 17 * given Non-Secure masters. 18 * 19 * When booting an EL3 payload, this is simplified: we configure region 0 with 20 * secure access only and do not enable any other region. 21 ******************************************************************************/ 22 void arm_tzc_dmc500_setup(tzc_dmc500_driver_data_t *plat_driver_data) 23 { 24 assert(plat_driver_data); 25 26 INFO("Configuring DMC-500 TZ Settings\n"); 27 28 tzc_dmc500_driver_init(plat_driver_data); 29 30 #ifndef EL3_PAYLOAD_BASE 31 /* Region 0 set to no access by default */ 32 tzc_dmc500_configure_region0(TZC_REGION_S_NONE, 0); 33 34 /* Region 1 set to cover Secure part of DRAM */ 35 tzc_dmc500_configure_region(1, ARM_AP_TZC_DRAM1_BASE, 36 ARM_EL3_TZC_DRAM1_END, 37 TZC_REGION_S_RDWR, 38 0); 39 40 /* Region 2 set to cover Non-Secure access to 1st DRAM address range.*/ 41 tzc_dmc500_configure_region(2, 42 ARM_NS_DRAM1_BASE, 43 ARM_NS_DRAM1_END, 44 ARM_TZC_NS_DRAM_S_ACCESS, 45 PLAT_ARM_TZC_NS_DEV_ACCESS); 46 47 /* Region 3 set to cover Non-Secure access to 2nd DRAM address range */ 48 tzc_dmc500_configure_region(3, 49 ARM_DRAM2_BASE, 50 ARM_DRAM2_END, 51 ARM_TZC_NS_DRAM_S_ACCESS, 52 PLAT_ARM_TZC_NS_DEV_ACCESS); 53 #else 54 /* Allow secure access only to DRAM for EL3 payloads */ 55 tzc_dmc500_configure_region0(TZC_REGION_S_RDWR, 0); 56 #endif 57 /* 58 * Raise an exception if a NS device tries to access secure memory 59 * TODO: Add interrupt handling support. 60 */ 61 tzc_dmc500_set_action(TZC_ACTION_RV_LOWERR); 62 63 /* 64 * Flush the configuration settings to have an affect. Validate 65 * flush by checking FILTER_EN is set on region 1 attributes 66 * register. 67 */ 68 tzc_dmc500_config_complete(); 69 70 /* 71 * Wait for the flush to complete. 72 * TODO: Have a timeout for this loop 73 */ 74 while (tzc_dmc500_verify_complete()) 75 ; 76 } 77
