1 /* 2 * Copyright (c) 2015-2025, 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 #include <plat/common/platform.h> 18 19 /* Weak definitions may be overridden in specific ARM standard platform */ 20 #pragma weak tsp_early_platform_setup 21 #pragma weak tsp_platform_setup 22 #pragma weak tsp_plat_arch_setup 23 24 #define MAP_BL_TSP_TOTAL MAP_REGION_FLAT( \ 25 BL32_BASE, \ 26 BL32_END - BL32_BASE, \ 27 MT_MEMORY | MT_RW | MT_SECURE) 28 29 /******************************************************************************* 30 * Initialize the UART 31 ******************************************************************************/ 32 static console_t arm_tsp_runtime_console; 33 34 void arm_tsp_early_platform_setup(void) 35 { 36 /* 37 * Initialize a different console than already in use to display 38 * messages from TSP 39 */ 40 int rc = console_pl011_register(PLAT_ARM_TSP_UART_BASE, 41 PLAT_ARM_TSP_UART_CLK_IN_HZ, 42 ARM_CONSOLE_BAUDRATE, 43 &arm_tsp_runtime_console); 44 if (rc == 0) 45 panic(); 46 47 console_set_scope(&arm_tsp_runtime_console, 48 CONSOLE_FLAG_BOOT | CONSOLE_FLAG_RUNTIME); 49 } 50 51 void tsp_early_platform_setup(void) 52 { 53 arm_tsp_early_platform_setup(); 54 } 55 56 /******************************************************************************* 57 * Perform platform specific setup placeholder 58 ******************************************************************************/ 59 void tsp_platform_setup(void) 60 { 61 /* 62 * On GICv2 the driver must be initialised before calling the plat_ic_* 63 * functions as they need the data structures. Higher versions don't. 64 */ 65 #if USE_GIC_DRIVER == 2 66 gic_init(plat_my_core_pos()); 67 #endif 68 } 69 70 /******************************************************************************* 71 * Perform the very early platform specific architectural setup here. At the 72 * moment this is only initializes the MMU 73 ******************************************************************************/ 74 void tsp_plat_arch_setup(void) 75 { 76 #if USE_COHERENT_MEM 77 /* Ensure ARM platforms don't use coherent memory in TSP */ 78 assert((BL_COHERENT_RAM_END - BL_COHERENT_RAM_BASE) == 0U); 79 #endif 80 81 const mmap_region_t bl_regions[] = { 82 MAP_BL_TSP_TOTAL, 83 ARM_MAP_BL_RO, 84 {0} 85 }; 86 87 setup_page_tables(bl_regions, plat_arm_get_mmap()); 88 enable_mmu_el1(0); 89 90 #if PLAT_RO_XLAT_TABLES 91 arm_xlat_make_tables_readonly(); 92 #endif 93 } 94