1 /* 2 * Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * Redistributions of source code must retain the above copyright notice, this 8 * list of conditions and the following disclaimer. 9 * 10 * Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 14 * Neither the name of ARM nor the names of its contributors may be used 15 * to endorse or promote products derived from this software without specific 16 * prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include <arch.h> 32 #include <arch_helpers.h> 33 #include <assert.h> 34 #include <bl_common.h> 35 #include <bl1.h> 36 #include <debug.h> 37 #include <platform.h> 38 #include <platform_def.h> 39 #include <stdio.h> 40 #include "bl1_private.h" 41 42 /******************************************************************************* 43 * Runs BL2 from the given entry point. It results in dropping the 44 * exception level 45 ******************************************************************************/ 46 static void __dead2 bl1_run_bl2(entry_point_info_t *bl2_ep) 47 { 48 bl1_arch_next_el_setup(); 49 50 /* Tell next EL what we want done */ 51 bl2_ep->args.arg0 = RUN_IMAGE; 52 53 if (GET_SECURITY_STATE(bl2_ep->h.attr) == NON_SECURE) 54 change_security_state(GET_SECURITY_STATE(bl2_ep->h.attr)); 55 56 write_spsr_el3(bl2_ep->spsr); 57 write_elr_el3(bl2_ep->pc); 58 59 eret(bl2_ep->args.arg0, 60 bl2_ep->args.arg1, 61 bl2_ep->args.arg2, 62 bl2_ep->args.arg3, 63 bl2_ep->args.arg4, 64 bl2_ep->args.arg5, 65 bl2_ep->args.arg6, 66 bl2_ep->args.arg7); 67 } 68 69 70 /******************************************************************************* 71 * Function to perform late architectural and platform specific initialization. 72 * It also locates and loads the BL2 raw binary image in the trusted DRAM. Only 73 * called by the primary cpu after a cold boot. 74 * TODO: Add support for alternative image load mechanism e.g using virtio/elf 75 * loader etc. 76 ******************************************************************************/ 77 void bl1_main(void) 78 { 79 #if DEBUG 80 unsigned long sctlr_el3 = read_sctlr_el3(); 81 #endif 82 unsigned int load_type = TOP_LOAD; 83 image_info_t bl2_image_info = { {0} }; 84 entry_point_info_t bl2_ep = { {0} }; 85 meminfo_t *bl1_tzram_layout; 86 meminfo_t *bl2_tzram_layout = 0x0; 87 int err; 88 89 /* 90 * Ensure that MMU/Caches and coherency are turned on 91 */ 92 assert(sctlr_el3 | SCTLR_M_BIT); 93 assert(sctlr_el3 | SCTLR_C_BIT); 94 assert(sctlr_el3 | SCTLR_I_BIT); 95 96 /* Perform remaining generic architectural setup from EL3 */ 97 bl1_arch_setup(); 98 99 /* Perform platform setup in BL1. */ 100 bl1_platform_setup(); 101 102 /* Announce our arrival */ 103 printf(FIRMWARE_WELCOME_STR); 104 printf("%s\n\r", build_message); 105 106 SET_PARAM_HEAD(&bl2_image_info, PARAM_IMAGE_BINARY, VERSION_1, 0); 107 SET_PARAM_HEAD(&bl2_ep, PARAM_EP, VERSION_1, 0); 108 109 /* 110 * Find out how much free trusted ram remains after BL1 load 111 * & load the BL2 image at its top 112 */ 113 bl1_tzram_layout = bl1_plat_sec_mem_layout(); 114 err = load_image(bl1_tzram_layout, 115 (const char *) BL2_IMAGE_NAME, 116 load_type, 117 BL2_BASE, 118 &bl2_image_info, 119 &bl2_ep); 120 if (err) { 121 /* 122 * TODO: print failure to load BL2 but also add a tzwdog timer 123 * which will reset the system eventually. 124 */ 125 printf("Failed to load boot loader stage 2 (BL2) firmware.\n"); 126 panic(); 127 } 128 /* 129 * Create a new layout of memory for BL2 as seen by BL1 i.e. 130 * tell it the amount of total and free memory available. 131 * This layout is created at the first free address visible 132 * to BL2. BL2 will read the memory layout before using its 133 * memory for other purposes. 134 */ 135 bl2_tzram_layout = (meminfo_t *) bl1_tzram_layout->free_base; 136 init_bl2_mem_layout(bl1_tzram_layout, 137 bl2_tzram_layout, 138 load_type, 139 bl2_image_info.image_base); 140 141 bl1_plat_set_bl2_ep_info(&bl2_image_info, &bl2_ep); 142 bl2_ep.args.arg1 = (unsigned long)bl2_tzram_layout; 143 printf("Booting trusted firmware boot loader stage 2\n"); 144 #if DEBUG 145 printf("BL2 address = 0x%llx\n", 146 (unsigned long long) bl2_ep.pc); 147 printf("BL2 cpsr = 0x%x\n", bl2_ep.spsr); 148 printf("BL2 memory layout address = 0x%llx\n", 149 (unsigned long long) bl2_tzram_layout); 150 #endif 151 bl1_run_bl2(&bl2_ep); 152 153 return; 154 } 155 156 /******************************************************************************* 157 * Temporary function to print the fact that BL2 has done its job and BL31 is 158 * about to be loaded. This is needed as long as printfs cannot be used 159 ******************************************************************************/ 160 void display_boot_progress(entry_point_info_t *bl31_ep_info) 161 { 162 printf("Booting trusted firmware boot loader stage 3\n\r"); 163 #if DEBUG 164 printf("BL31 address = 0x%llx\n", (unsigned long long)bl31_ep_info->pc); 165 printf("BL31 cpsr = 0x%llx\n", (unsigned long long)bl31_ep_info->spsr); 166 printf("BL31 params address = 0x%llx\n", 167 (unsigned long long)bl31_ep_info->args.arg0); 168 printf("BL31 plat params address = 0x%llx\n", 169 (unsigned long long)bl31_ep_info->args.arg1); 170 #endif 171 return; 172 } 173