1 /* 2 * Copyright (c) 2016-2023, Arm Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <assert.h> 8 9 #include <bl32/sp_min/platform_sp_min.h> 10 #include <common/debug.h> 11 #include <lib/fconf/fconf.h> 12 #include <lib/fconf/fconf_dyn_cfg_getter.h> 13 #include <plat/arm/common/plat_arm.h> 14 15 #include "../fvp_private.h" 16 17 void plat_arm_sp_min_early_platform_setup(u_register_t arg0, u_register_t arg1, 18 u_register_t arg2, u_register_t arg3) 19 { 20 const struct dyn_cfg_dtb_info_t *tos_fw_config_info __unused; 21 22 /* Initialize the console to provide early debug support */ 23 arm_console_boot_init(); 24 25 #if !RESET_TO_SP_MIN && !RESET_TO_BL2 26 27 INFO("SP_MIN FCONF: FW_CONFIG address = %lx\n", (uintptr_t)arg1); 28 /* Fill the properties struct with the info from the config dtb */ 29 fconf_populate("FW_CONFIG", arg1); 30 31 tos_fw_config_info = FCONF_GET_PROPERTY(dyn_cfg, dtb, TOS_FW_CONFIG_ID); 32 if (tos_fw_config_info != NULL) { 33 arg1 = tos_fw_config_info->config_addr; 34 } 35 #endif /* !RESET_TO_SP_MIN && !RESET_TO_BL2 */ 36 37 arm_sp_min_early_platform_setup((void *)arg0, arg1, arg2, (void *)arg3); 38 39 /* Initialize the platform config for future decision making */ 40 fvp_config_setup(); 41 42 /* 43 * Initialize the correct interconnect for this cluster during cold 44 * boot. No need for locks as no other CPU is active. 45 */ 46 fvp_interconnect_init(); 47 48 /* 49 * Enable coherency in interconnect for the primary CPU's cluster. 50 * Earlier bootloader stages might already do this (e.g. Trusted 51 * Firmware's BL1 does it) but we can't assume so. There is no harm in 52 * executing this code twice anyway. 53 * FVP PSCI code will enable coherency for other clusters. 54 */ 55 fvp_interconnect_enable(); 56 } 57 58 void sp_min_plat_arch_setup(void) 59 { 60 int rc __unused; 61 const struct dyn_cfg_dtb_info_t *hw_config_info __unused; 62 uintptr_t hw_config_base_align __unused; 63 size_t mapped_size_align __unused; 64 65 arm_sp_min_plat_arch_setup(); 66 67 /* 68 * For RESET_TO_SP_MIN systems, SP_MIN(BL32) is the first bootloader 69 * to run. So there is no BL2 to load the HW_CONFIG dtb into memory 70 * before control is passed to SP_MIN. 71 * Also, BL2 skips loading HW_CONFIG dtb for 72 * RESET_TO_BL2 builds. 73 * The code below relies on dynamic mapping capability, 74 * which is not supported by xlat tables lib V1. 75 * TODO: remove the ARM_XLAT_TABLES_LIB_V1 check when its support 76 * gets deprecated. 77 */ 78 #if !RESET_TO_SP_MIN && !RESET_TO_BL2 && !ARM_XLAT_TABLES_LIB_V1 79 hw_config_info = FCONF_GET_PROPERTY(dyn_cfg, dtb, HW_CONFIG_ID); 80 assert(hw_config_info != NULL); 81 assert(hw_config_info->config_addr != 0UL); 82 83 INFO("SP_MIN FCONF: HW_CONFIG address = %p\n", 84 (void *)hw_config_info->config_addr); 85 86 /* 87 * Preferably we expect this address and size are page aligned, 88 * but if they are not then align it. 89 */ 90 hw_config_base_align = page_align(hw_config_info->config_addr, DOWN); 91 mapped_size_align = page_align(hw_config_info->config_max_size, UP); 92 93 if ((hw_config_info->config_addr != hw_config_base_align) && 94 (hw_config_info->config_max_size == mapped_size_align)) { 95 mapped_size_align += PAGE_SIZE; 96 } 97 98 /* 99 * map dynamically HW config region with its aligned base address and 100 * size 101 */ 102 rc = mmap_add_dynamic_region((unsigned long long)hw_config_base_align, 103 hw_config_base_align, 104 mapped_size_align, 105 MT_RO_DATA); 106 if (rc != 0) { 107 ERROR("Error while mapping HW_CONFIG device tree (%d).\n", rc); 108 panic(); 109 } 110 111 /* Populate HW_CONFIG device tree with the mapped address */ 112 fconf_populate("HW_CONFIG", hw_config_info->config_addr); 113 114 /* unmap the HW_CONFIG memory region */ 115 rc = mmap_remove_dynamic_region(hw_config_base_align, mapped_size_align); 116 if (rc != 0) { 117 ERROR("Error while unmapping HW_CONFIG device tree (%d).\n", 118 rc); 119 panic(); 120 } 121 #endif /*!RESET_TO_SP_MIN && !RESET_TO_BL2 && !ARM_XLAT_TABLES_LIB_V1*/ 122 } 123