1 /* 2 * Copyright (c) 2015-2020, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <assert.h> 8 9 #include <platform_def.h> 10 11 #include <bl32/tsp/platform_tsp.h> 12 #include <common/bl_common.h> 13 #include <common/debug.h> 14 #include <drivers/arm/pl011.h> 15 #include <drivers/console.h> 16 #include <plat/arm/common/plat_arm.h> 17 18 /* Weak definitions may be overridden in specific ARM standard platform */ 19 #pragma weak tsp_early_platform_setup 20 #pragma weak tsp_platform_setup 21 #pragma weak tsp_plat_arch_setup 22 23 #define MAP_BL_TSP_TOTAL MAP_REGION_FLAT( \ 24 BL32_BASE, \ 25 BL32_END - BL32_BASE, \ 26 MT_MEMORY | MT_RW | MT_SECURE) 27 28 /******************************************************************************* 29 * Initialize the UART 30 ******************************************************************************/ 31 static console_t arm_tsp_runtime_console; 32 33 void arm_tsp_early_platform_setup(void) 34 { 35 /* 36 * Initialize a different console than already in use to display 37 * messages from TSP 38 */ 39 int rc = console_pl011_register(PLAT_ARM_TSP_UART_BASE, 40 PLAT_ARM_TSP_UART_CLK_IN_HZ, 41 ARM_CONSOLE_BAUDRATE, 42 &arm_tsp_runtime_console); 43 if (rc == 0) 44 panic(); 45 46 console_set_scope(&arm_tsp_runtime_console, 47 CONSOLE_FLAG_BOOT | CONSOLE_FLAG_RUNTIME); 48 } 49 50 void tsp_early_platform_setup(void) 51 { 52 arm_tsp_early_platform_setup(); 53 } 54 55 /******************************************************************************* 56 * Perform platform specific setup placeholder 57 ******************************************************************************/ 58 void tsp_platform_setup(void) 59 { 60 plat_arm_gic_driver_init(); 61 } 62 63 /******************************************************************************* 64 * Perform the very early platform specific architectural setup here. At the 65 * moment this is only intializes the MMU 66 ******************************************************************************/ 67 void tsp_plat_arch_setup(void) 68 { 69 #if USE_COHERENT_MEM 70 /* Ensure ARM platforms don't use coherent memory in TSP */ 71 assert((BL_COHERENT_RAM_END - BL_COHERENT_RAM_BASE) == 0U); 72 #endif 73 74 const mmap_region_t bl_regions[] = { 75 MAP_BL_TSP_TOTAL, 76 ARM_MAP_BL_RO, 77 {0} 78 }; 79 80 setup_page_tables(bl_regions, plat_arm_get_mmap()); 81 enable_mmu_el1(0); 82 83 #if PLAT_RO_XLAT_TABLES 84 arm_xlat_make_tables_readonly(); 85 #endif 86 } 87