1 /* 2 * Copyright (c) 2013, ARM Limited. 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, *bl2_tzram_layout = 0x0; 54 55 /* 56 * Ensure that MMU/Caches and coherency are turned on 57 */ 58 assert(sctlr_el3 | SCTLR_M_BIT); 59 assert(sctlr_el3 | SCTLR_C_BIT); 60 assert(sctlr_el3 | SCTLR_I_BIT); 61 62 /* Perform remaining generic architectural setup from EL3 */ 63 bl1_arch_setup(); 64 65 /* Perform platform setup in BL1. */ 66 bl1_platform_setup(); 67 68 /* Announce our arrival */ 69 printf(FIRMWARE_WELCOME_STR); 70 printf("Built : %s, %s\n\r", __TIME__, __DATE__); 71 72 /* 73 * Find out how much free trusted ram remains after BL1 load 74 * & load the BL2 image at its top 75 */ 76 bl1_tzram_layout = bl1_get_sec_mem_layout(); 77 bl2_base = load_image(&bl1_tzram_layout, 78 (const char *) BL2_IMAGE_NAME, 79 load_type, BL2_BASE); 80 81 /* 82 * Create a new layout of memory for BL2 as seen by BL1 i.e. 83 * tell it the amount of total and free memory available. 84 * This layout is created at the first free address visible 85 * to BL2. BL2 will read the memory layout before using its 86 * memory for other purposes. 87 */ 88 bl2_tzram_layout = (meminfo *) bl1_tzram_layout.free_base; 89 init_bl2_mem_layout(&bl1_tzram_layout, 90 bl2_tzram_layout, 91 load_type, 92 bl2_base); 93 94 if (bl2_base) { 95 bl1_arch_next_el_setup(); 96 spsr = make_spsr(MODE_EL1, MODE_SP_ELX, MODE_RW_64); 97 printf("Booting trusted firmware boot loader stage 2\n\r"); 98 #if DEBUG 99 printf("BL2 address = 0x%llx \n\r", (unsigned long long) bl2_base); 100 printf("BL2 cpsr = 0x%x \n\r", spsr); 101 printf("BL2 memory layout address = 0x%llx \n\r", 102 (unsigned long long) bl2_tzram_layout); 103 #endif 104 run_image(bl2_base, spsr, SECURE, bl2_tzram_layout, 0); 105 } 106 107 /* 108 * TODO: print failure to load BL2 but also add a tzwdog timer 109 * which will reset the system eventually. 110 */ 111 printf("Failed to load boot loader stage 2 (BL2) firmware.\n\r"); 112 return; 113 } 114 115 /******************************************************************************* 116 * Temporary function to print the fact that BL2 has done its job and BL31 is 117 * about to be loaded. This is needed as long as printfs cannot be used 118 ******************************************************************************/ 119 void display_boot_progress(unsigned long entrypoint, 120 unsigned long spsr, 121 unsigned long mem_layout, 122 unsigned long ns_image_info) 123 { 124 printf("Booting trusted firmware boot loader stage 3\n\r"); 125 #if DEBUG 126 printf("BL31 address = 0x%llx \n\r", (unsigned long long) entrypoint); 127 printf("BL31 cpsr = 0x%llx \n\r", (unsigned long long)spsr); 128 printf("BL31 memory layout address = 0x%llx \n\r", (unsigned long long)mem_layout); 129 printf("BL31 non-trusted image info address = 0x%llx\n\r", (unsigned long long)ns_image_info); 130 #endif 131 return; 132 } 133