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/common/platform.h> 16 17 #include <arm_def.h> 18 #include <plat_arm.h> 19 20 /* Weak definitions may be overridden in specific ARM standard platform */ 21 #pragma weak bl2u_platform_setup 22 #pragma weak bl2u_early_platform_setup 23 #pragma weak bl2u_plat_arch_setup 24 25 #define MAP_BL2U_TOTAL MAP_REGION_FLAT( \ 26 BL2U_BASE, \ 27 BL2U_LIMIT - BL2U_BASE, \ 28 MT_MEMORY | MT_RW | MT_SECURE) 29 30 /* 31 * Perform ARM standard platform setup for BL2U 32 */ 33 void arm_bl2u_platform_setup(void) 34 { 35 /* Initialize the secure environment */ 36 plat_arm_security_setup(); 37 } 38 39 void bl2u_platform_setup(void) 40 { 41 arm_bl2u_platform_setup(); 42 } 43 44 void arm_bl2u_early_platform_setup(struct meminfo *mem_layout, void *plat_info) 45 { 46 /* Initialize the console to provide early debug support */ 47 arm_console_boot_init(); 48 49 generic_delay_timer_init(); 50 } 51 52 /******************************************************************************* 53 * BL1 can pass platform dependent information to BL2U in x1. 54 * In case of ARM CSS platforms x1 contains SCP_BL2U image info. 55 * In case of ARM FVP platforms x1 is not used. 56 * In both cases, x0 contains the extents of the memory available to BL2U 57 ******************************************************************************/ 58 void bl2u_early_platform_setup(struct meminfo *mem_layout, void *plat_info) 59 { 60 arm_bl2u_early_platform_setup(mem_layout, plat_info); 61 } 62 63 /******************************************************************************* 64 * Perform the very early platform specific architectural setup here. At the 65 * moment this is only initializes the mmu in a quick and dirty way. 66 * The memory that is used by BL2U is only mapped. 67 ******************************************************************************/ 68 void arm_bl2u_plat_arch_setup(void) 69 { 70 71 #if USE_COHERENT_MEM 72 /* Ensure ARM platforms dont use coherent memory in BL2U */ 73 assert((BL_COHERENT_RAM_END - BL_COHERENT_RAM_BASE) == 0U); 74 #endif 75 76 const mmap_region_t bl_regions[] = { 77 MAP_BL2U_TOTAL, 78 ARM_MAP_BL_RO, 79 #if USE_ROMLIB 80 ARM_MAP_ROMLIB_CODE, 81 ARM_MAP_ROMLIB_DATA, 82 #endif 83 {0} 84 }; 85 86 setup_page_tables(bl_regions, plat_arm_get_mmap()); 87 88 #ifdef AARCH32 89 enable_mmu_svc_mon(0); 90 #else 91 enable_mmu_el1(0); 92 #endif 93 arm_setup_romlib(); 94 } 95 96 void bl2u_plat_arch_setup(void) 97 { 98 arm_bl2u_plat_arch_setup(); 99 } 100