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 <stdio.h> 39 #include "bl1_private.h" 40 41 /******************************************************************************* 42 * Runs BL2 from the given entry point. It results in dropping the 43 * exception level 44 ******************************************************************************/ 45 static void __dead2 bl1_run_bl2(entry_point_info_t *bl2_ep) 46 { 47 bl1_arch_next_el_setup(); 48 49 /* Tell next EL what we want done */ 50 bl2_ep->args.arg0 = RUN_IMAGE; 51 52 if (GET_SECURITY_STATE(bl2_ep->h.attr) == NON_SECURE) 53 change_security_state(GET_SECURITY_STATE(bl2_ep->h.attr)); 54 55 write_spsr_el3(bl2_ep->spsr); 56 write_elr_el3(bl2_ep->pc); 57 58 eret(bl2_ep->args.arg0, 59 bl2_ep->args.arg1, 60 bl2_ep->args.arg2, 61 bl2_ep->args.arg3, 62 bl2_ep->args.arg4, 63 bl2_ep->args.arg5, 64 bl2_ep->args.arg6, 65 bl2_ep->args.arg7); 66 } 67 68 69 /******************************************************************************* 70 * Function to perform late architectural and platform specific initialization. 71 * It also locates and loads the BL2 raw binary image in the trusted DRAM. Only 72 * called by the primary cpu after a cold boot. 73 * TODO: Add support for alternative image load mechanism e.g using virtio/elf 74 * loader etc. 75 ******************************************************************************/ 76 void bl1_main(void) 77 { 78 #if DEBUG 79 unsigned long sctlr_el3 = read_sctlr_el3(); 80 #endif 81 unsigned int load_type = TOP_LOAD; 82 image_info_t bl2_image_info = { {0} }; 83 entry_point_info_t bl2_ep = { {0} }; 84 meminfo_t *bl1_tzram_layout; 85 meminfo_t *bl2_tzram_layout = 0x0; 86 int err; 87 88 /* 89 * Ensure that MMU/Caches and coherency are turned on 90 */ 91 assert(sctlr_el3 | SCTLR_M_BIT); 92 assert(sctlr_el3 | SCTLR_C_BIT); 93 assert(sctlr_el3 | SCTLR_I_BIT); 94 95 /* Perform remaining generic architectural setup from EL3 */ 96 bl1_arch_setup(); 97 98 /* Perform platform setup in BL1. */ 99 bl1_platform_setup(); 100 101 /* Announce our arrival */ 102 printf(FIRMWARE_WELCOME_STR); 103 printf("%s\n\r", build_message); 104 105 SET_PARAM_HEAD(&bl2_image_info, PARAM_IMAGE_BINARY, VERSION_1, 0); 106 SET_PARAM_HEAD(&bl2_ep, PARAM_EP, VERSION_1, 0); 107 108 /* 109 * Find out how much free trusted ram remains after BL1 load 110 * & load the BL2 image at its top 111 */ 112 bl1_tzram_layout = bl1_plat_sec_mem_layout(); 113 err = load_image(bl1_tzram_layout, 114 (const char *) BL2_IMAGE_NAME, 115 load_type, 116 BL2_BASE, 117 &bl2_image_info, 118 &bl2_ep); 119 if (err) { 120 /* 121 * TODO: print failure to load BL2 but also add a tzwdog timer 122 * which will reset the system eventually. 123 */ 124 printf("Failed to load boot loader stage 2 (BL2) firmware.\n"); 125 panic(); 126 } 127 /* 128 * Create a new layout of memory for BL2 as seen by BL1 i.e. 129 * tell it the amount of total and free memory available. 130 * This layout is created at the first free address visible 131 * to BL2. BL2 will read the memory layout before using its 132 * memory for other purposes. 133 */ 134 bl2_tzram_layout = (meminfo_t *) bl1_tzram_layout->free_base; 135 init_bl2_mem_layout(bl1_tzram_layout, 136 bl2_tzram_layout, 137 load_type, 138 bl2_image_info.image_base); 139 140 bl1_plat_set_bl2_ep_info(&bl2_image_info, &bl2_ep); 141 bl2_ep.args.arg1 = (unsigned long)bl2_tzram_layout; 142 printf("Booting trusted firmware boot loader stage 2\n"); 143 #if DEBUG 144 printf("BL2 address = 0x%llx\n", 145 (unsigned long long) bl2_ep.pc); 146 printf("BL2 cpsr = 0x%x\n", bl2_ep.spsr); 147 printf("BL2 memory layout address = 0x%llx\n", 148 (unsigned long long) bl2_tzram_layout); 149 #endif 150 bl1_run_bl2(&bl2_ep); 151 152 return; 153 } 154 155 /******************************************************************************* 156 * Temporary function to print the fact that BL2 has done its job and BL31 is 157 * about to be loaded. This is needed as long as printfs cannot be used 158 ******************************************************************************/ 159 void display_boot_progress(entry_point_info_t *bl31_ep_info) 160 { 161 printf("Booting trusted firmware boot loader stage 3\n\r"); 162 #if DEBUG 163 printf("BL31 address = 0x%llx\n", (unsigned long long)bl31_ep_info->pc); 164 printf("BL31 cpsr = 0x%llx\n", (unsigned long long)bl31_ep_info->spsr); 165 printf("BL31 params address = 0x%llx\n", 166 (unsigned long long)bl31_ep_info->args.arg0); 167 printf("BL31 plat params address = 0x%llx\n", 168 (unsigned long long)bl31_ep_info->args.arg1); 169 #endif 170 return; 171 } 172