1 /* 2 * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <assert.h> 8 #include <string.h> 9 10 #include <platform_def.h> 11 12 #include <arch_helpers.h> 13 #include <common/bl_common.h> 14 #include <drivers/generic_delay_timer.h> 15 #include <plat/arm/common/plat_arm.h> 16 #include <plat/common/platform.h> 17 18 /* Weak definitions may be overridden in specific ARM standard platform */ 19 #pragma weak bl2u_platform_setup 20 #pragma weak bl2u_early_platform_setup 21 #pragma weak bl2u_plat_arch_setup 22 23 #define MAP_BL2U_TOTAL MAP_REGION_FLAT( \ 24 BL2U_BASE, \ 25 BL2U_LIMIT - BL2U_BASE, \ 26 MT_MEMORY | MT_RW | MT_SECURE) 27 28 /* 29 * Perform ARM standard platform setup for BL2U 30 */ 31 void arm_bl2u_platform_setup(void) 32 { 33 /* Initialize the secure environment */ 34 plat_arm_security_setup(); 35 } 36 37 void bl2u_platform_setup(void) 38 { 39 arm_bl2u_platform_setup(); 40 } 41 42 void arm_bl2u_early_platform_setup(struct meminfo *mem_layout, void *plat_info) 43 { 44 /* Initialize the console to provide early debug support */ 45 arm_console_boot_init(); 46 47 generic_delay_timer_init(); 48 } 49 50 /******************************************************************************* 51 * BL1 can pass platform dependent information to BL2U in x1. 52 * In case of ARM CSS platforms x1 contains SCP_BL2U image info. 53 * In case of ARM FVP platforms x1 is not used. 54 * In both cases, x0 contains the extents of the memory available to BL2U 55 ******************************************************************************/ 56 void bl2u_early_platform_setup(struct meminfo *mem_layout, void *plat_info) 57 { 58 arm_bl2u_early_platform_setup(mem_layout, plat_info); 59 } 60 61 /******************************************************************************* 62 * Perform the very early platform specific architectural setup here. At the 63 * moment this is only initializes the mmu in a quick and dirty way. 64 * The memory that is used by BL2U is only mapped. 65 ******************************************************************************/ 66 void arm_bl2u_plat_arch_setup(void) 67 { 68 69 #if USE_COHERENT_MEM 70 /* Ensure ARM platforms dont use coherent memory in BL2U */ 71 assert((BL_COHERENT_RAM_END - BL_COHERENT_RAM_BASE) == 0U); 72 #endif 73 74 const mmap_region_t bl_regions[] = { 75 MAP_BL2U_TOTAL, 76 ARM_MAP_BL_RO, 77 #if USE_ROMLIB 78 ARM_MAP_ROMLIB_CODE, 79 ARM_MAP_ROMLIB_DATA, 80 #endif 81 {0} 82 }; 83 84 setup_page_tables(bl_regions, plat_arm_get_mmap()); 85 86 #ifdef __aarch64__ 87 enable_mmu_el1(0); 88 #else 89 enable_mmu_svc_mon(0); 90 #endif 91 arm_setup_romlib(); 92 } 93 94 void bl2u_plat_arch_setup(void) 95 { 96 arm_bl2u_plat_arch_setup(); 97 } 98