1 /* 2 * Copyright (c) 2013, 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 <stdio.h> 32 #include <string.h> 33 #include <assert.h> 34 #include <arch_helpers.h> 35 #include <platform.h> 36 #include <semihosting.h> 37 #include <bl1.h> 38 39 void bl1_arch_next_el_setup(void); 40 41 /******************************************************************************* 42 * Function to perform late architectural and platform specific initialization. 43 * It also locates and loads the BL2 raw binary image in the trusted DRAM. Only 44 * called by the primary cpu after a cold boot. 45 * TODO: Add support for alternative image load mechanism e.g using virtio/elf 46 * loader etc. 47 ******************************************************************************/ 48 void bl1_main(void) 49 { 50 unsigned long sctlr_el3 = read_sctlr(); 51 unsigned long bl2_base; 52 unsigned int load_type = TOP_LOAD, spsr; 53 meminfo *bl1_tzram_layout; 54 meminfo *bl2_tzram_layout = 0x0; 55 56 /* 57 * Ensure that MMU/Caches and coherency are turned on 58 */ 59 assert(sctlr_el3 | SCTLR_M_BIT); 60 assert(sctlr_el3 | SCTLR_C_BIT); 61 assert(sctlr_el3 | SCTLR_I_BIT); 62 63 /* Perform remaining generic architectural setup from EL3 */ 64 bl1_arch_setup(); 65 66 /* Perform platform setup in BL1. */ 67 bl1_platform_setup(); 68 69 /* Announce our arrival */ 70 printf(FIRMWARE_WELCOME_STR); 71 printf("Built : %s, %s\n\r", __TIME__, __DATE__); 72 73 /* 74 * Find out how much free trusted ram remains after BL1 load 75 * & load the BL2 image at its top 76 */ 77 bl1_tzram_layout = bl1_plat_sec_mem_layout(); 78 bl2_base = load_image(bl1_tzram_layout, 79 (const char *) BL2_IMAGE_NAME, 80 load_type, BL2_BASE); 81 82 /* 83 * Create a new layout of memory for BL2 as seen by BL1 i.e. 84 * tell it the amount of total and free memory available. 85 * This layout is created at the first free address visible 86 * to BL2. BL2 will read the memory layout before using its 87 * memory for other purposes. 88 */ 89 bl2_tzram_layout = (meminfo *) bl1_tzram_layout->free_base; 90 init_bl2_mem_layout(bl1_tzram_layout, 91 bl2_tzram_layout, 92 load_type, 93 bl2_base); 94 95 if (bl2_base) { 96 bl1_arch_next_el_setup(); 97 spsr = make_spsr(MODE_EL1, MODE_SP_ELX, MODE_RW_64); 98 printf("Booting trusted firmware boot loader stage 2\n\r"); 99 #if DEBUG 100 printf("BL2 address = 0x%llx \n\r", (unsigned long long) bl2_base); 101 printf("BL2 cpsr = 0x%x \n\r", spsr); 102 printf("BL2 memory layout address = 0x%llx \n\r", 103 (unsigned long long) bl2_tzram_layout); 104 #endif 105 run_image(bl2_base, spsr, SECURE, bl2_tzram_layout, 0); 106 } 107 108 /* 109 * TODO: print failure to load BL2 but also add a tzwdog timer 110 * which will reset the system eventually. 111 */ 112 printf("Failed to load boot loader stage 2 (BL2) firmware.\n\r"); 113 return; 114 } 115 116 /******************************************************************************* 117 * Temporary function to print the fact that BL2 has done its job and BL31 is 118 * about to be loaded. This is needed as long as printfs cannot be used 119 ******************************************************************************/ 120 void display_boot_progress(unsigned long entrypoint, 121 unsigned long spsr, 122 unsigned long mem_layout, 123 unsigned long ns_image_info) 124 { 125 printf("Booting trusted firmware boot loader stage 3\n\r"); 126 #if DEBUG 127 printf("BL31 address = 0x%llx \n\r", (unsigned long long) entrypoint); 128 printf("BL31 cpsr = 0x%llx \n\r", (unsigned long long)spsr); 129 printf("BL31 memory layout address = 0x%llx \n\r", (unsigned long long)mem_layout); 130 printf("BL31 non-trusted image info address = 0x%llx\n\r", (unsigned long long)ns_image_info); 131 #endif 132 return; 133 } 134