1 /* 2 * Copyright (c) 2017-2018, 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.h> 13 #include <arch_helpers.h> 14 #include <common/bl_common.h> 15 #include <common/debug.h> 16 #include <lib/xlat_tables/xlat_tables_v2.h> 17 18 #include <k3_console.h> 19 #include <k3_gicv3.h> 20 #include <ti_sci.h> 21 22 /* Table of regions to map using the MMU */ 23 const mmap_region_t plat_k3_mmap[] = { 24 MAP_REGION_FLAT(K3_USART_BASE, K3_USART_SIZE, MT_DEVICE | MT_RW | MT_SECURE), 25 MAP_REGION_FLAT(K3_GIC_BASE, K3_GIC_SIZE, MT_DEVICE | MT_RW | MT_SECURE), 26 MAP_REGION_FLAT(SEC_PROXY_RT_BASE, SEC_PROXY_RT_SIZE, MT_DEVICE | MT_RW | MT_SECURE), 27 MAP_REGION_FLAT(SEC_PROXY_SCFG_BASE, SEC_PROXY_SCFG_SIZE, MT_DEVICE | MT_RW | MT_SECURE), 28 MAP_REGION_FLAT(SEC_PROXY_DATA_BASE, SEC_PROXY_DATA_SIZE, MT_DEVICE | MT_RW | MT_SECURE), 29 { /* sentinel */ } 30 }; 31 32 /* 33 * Placeholder variables for maintaining information about the next image(s) 34 */ 35 static entry_point_info_t bl32_image_ep_info; 36 static entry_point_info_t bl33_image_ep_info; 37 38 /******************************************************************************* 39 * Gets SPSR for BL33 entry 40 ******************************************************************************/ 41 static uint32_t k3_get_spsr_for_bl33_entry(void) 42 { 43 unsigned long el_status; 44 unsigned int mode; 45 uint32_t spsr; 46 47 /* Figure out what mode we enter the non-secure world in */ 48 el_status = read_id_aa64pfr0_el1() >> ID_AA64PFR0_EL2_SHIFT; 49 el_status &= ID_AA64PFR0_ELX_MASK; 50 51 mode = (el_status) ? MODE_EL2 : MODE_EL1; 52 53 spsr = SPSR_64(mode, MODE_SP_ELX, DISABLE_ALL_EXCEPTIONS); 54 return spsr; 55 } 56 57 /******************************************************************************* 58 * Perform any BL3-1 early platform setup, such as console init and deciding on 59 * memory layout. 60 ******************************************************************************/ 61 void bl31_early_platform_setup2(u_register_t arg0, u_register_t arg1, 62 u_register_t arg2, u_register_t arg3) 63 { 64 /* There are no parameters from BL2 if BL31 is a reset vector */ 65 assert(arg0 == 0U); 66 assert(arg1 == 0U); 67 68 bl31_console_setup(); 69 70 #ifdef BL32_BASE 71 /* Populate entry point information for BL32 */ 72 SET_PARAM_HEAD(&bl32_image_ep_info, PARAM_EP, VERSION_1, 0); 73 bl32_image_ep_info.pc = BL32_BASE; 74 bl32_image_ep_info.spsr = SPSR_64(MODE_EL1, MODE_SP_ELX, 75 DISABLE_ALL_EXCEPTIONS); 76 SET_SECURITY_STATE(bl32_image_ep_info.h.attr, SECURE); 77 #endif 78 79 /* Populate entry point information for BL33 */ 80 SET_PARAM_HEAD(&bl33_image_ep_info, PARAM_EP, VERSION_1, 0); 81 bl33_image_ep_info.pc = PRELOADED_BL33_BASE; 82 bl33_image_ep_info.spsr = k3_get_spsr_for_bl33_entry(); 83 SET_SECURITY_STATE(bl33_image_ep_info.h.attr, NON_SECURE); 84 85 #ifdef K3_HW_CONFIG_BASE 86 /* 87 * According to the file ``Documentation/arm64/booting.txt`` of the 88 * Linux kernel tree, Linux expects the physical address of the device 89 * tree blob (DTB) in x0, while x1-x3 are reserved for future use and 90 * must be 0. 91 */ 92 bl33_image_ep_info.args.arg0 = (u_register_t)K3_HW_CONFIG_BASE; 93 bl33_image_ep_info.args.arg1 = 0U; 94 bl33_image_ep_info.args.arg2 = 0U; 95 bl33_image_ep_info.args.arg3 = 0U; 96 #endif 97 } 98 99 void bl31_plat_arch_setup(void) 100 { 101 const mmap_region_t bl_regions[] = { 102 MAP_REGION_FLAT(BL31_START, BL31_END - BL31_START, MT_MEMORY | MT_RW | MT_SECURE), 103 MAP_REGION_FLAT(BL_CODE_BASE, BL_CODE_END - BL_CODE_BASE, MT_CODE | MT_RO | MT_SECURE), 104 MAP_REGION_FLAT(BL_RO_DATA_BASE, BL_RO_DATA_END - BL_RO_DATA_END, MT_RO_DATA | MT_RO | MT_SECURE), 105 { /* sentinel */ } 106 }; 107 108 setup_page_tables(bl_regions, plat_k3_mmap); 109 enable_mmu_el3(0); 110 } 111 112 void bl31_platform_setup(void) 113 { 114 k3_gic_driver_init(K3_GIC_BASE); 115 k3_gic_init(); 116 117 ti_sci_init(); 118 } 119 120 void platform_mem_init(void) 121 { 122 /* Do nothing for now... */ 123 } 124 125 unsigned int plat_get_syscnt_freq2(void) 126 { 127 return SYS_COUNTER_FREQ_IN_TICKS; 128 } 129 130 /* 131 * Empty function to prevent the console from being uninitialized after BL33 is 132 * started and allow us to see messages from BL31. 133 */ 134 void bl31_plat_runtime_setup(void) 135 { 136 } 137 138 /******************************************************************************* 139 * Return a pointer to the 'entry_point_info' structure of the next image 140 * for the security state specified. BL3-3 corresponds to the non-secure 141 * image type while BL3-2 corresponds to the secure image type. A NULL 142 * pointer is returned if the image does not exist. 143 ******************************************************************************/ 144 entry_point_info_t *bl31_plat_get_next_image_ep_info(uint32_t type) 145 { 146 entry_point_info_t *next_image_info; 147 148 assert(sec_state_is_valid(type)); 149 next_image_info = (type == NON_SECURE) ? &bl33_image_ep_info : 150 &bl32_image_ep_info; 151 /* 152 * None of the images on the ARM development platforms can have 0x0 153 * as the entrypoint 154 */ 155 if (next_image_info->pc) 156 return next_image_info; 157 158 NOTICE("Requested nonexistent image\n"); 159 return NULL; 160 } 161